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// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:analyzer/error/error.dart';
import 'analyzer_error_code.dart';
export 'package:analyzer/src/analysis_options/error/option_codes.dart';
export 'package:analyzer/src/dart/error/hint_codes.dart';
export 'package:analyzer/src/dart/error/lint_codes.dart';
export 'package:analyzer/src/dart/error/todo_codes.dart';
// It is hard to visually separate each code's _doc comment_ from its published
// _documentation comment_ when each is written as an end-of-line comment.
// ignore_for_file: slash_for_doc_comments
/**
* The error codes used for compile time errors. The convention for this class
* is for the name of the error code to indicate the problem that caused the
* error to be generated and for the error message to explain what is wrong and,
* when appropriate, how the problem can be corrected.
*/
class CompileTimeErrorCode extends AnalyzerErrorCode {
static const CompileTimeErrorCode ABSTRACT_FIELD_CONSTRUCTOR_INITIALIZER =
CompileTimeErrorCode('ABSTRACT_FIELD_CONSTRUCTOR_INITIALIZER',
'Abstract fields cannot have initializers.',
correction:
"Try removing the field initializer or the 'abstract' keyword "
"from the field declaration.");
static const CompileTimeErrorCode ABSTRACT_FIELD_INITIALIZER =
CompileTimeErrorCode('ABSTRACT_FIELD_INITIALIZER',
'Abstract fields cannot have initializers.',
correction:
"Try removing the initializer or the 'abstract' keyword.");
/**
* Parameters:
* 0: the display name for the kind of the found abstract member
* 1: the name of the member
*/
// #### Description
//
// The analyzer produces this diagnostic when an inherited member is
// referenced using `super`, but there is no concrete implementation of the
// member in the superclass chain. Abstract members can't be invoked.
//
// #### Examples
//
// The following code produces this diagnostic because `B` doesn't inherit a
// concrete implementation of `a`:
//
// ```dart
// abstract class A {
// int get a;
// }
// class B extends A {
// int get a => super.[!a!];
// }
// ```
//
// #### Common fixes
//
// Remove the invocation of the abstract member, possibly replacing it with an
// invocation of a concrete member.
// TODO(brianwilkerson) This either needs to be generalized (use 'member'
// rather than '{0}') or split into multiple codes.
static const CompileTimeErrorCode ABSTRACT_SUPER_MEMBER_REFERENCE =
CompileTimeErrorCode('ABSTRACT_SUPER_MEMBER_REFERENCE',
"The {0} '{1}' is always abstract in the supertype.",
hasPublishedDocs: true);
/**
* Enum proposal: It is also a compile-time error to explicitly instantiate an
* enum via 'new' or 'const' or to access its private fields.
*/
static const CompileTimeErrorCode ACCESS_PRIVATE_ENUM_FIELD =
CompileTimeErrorCode(
'ACCESS_PRIVATE_ENUM_FIELD',
"The private fields of an enum can't be accessed, even within the "
"same library.");
/**
* 14.2 Exports: It is a compile-time error if a name <i>N</i> is re-exported
* by a library <i>L</i> and <i>N</i> is introduced into the export namespace
* of <i>L</i> by more than one export, unless each all exports refer to same
* declaration for the name N.
*
* Parameters:
* 0: the name of the ambiguous element
* 1: the name of the first library in which the type is found
* 2: the name of the second library in which the type is found
*/
static const CompileTimeErrorCode AMBIGUOUS_EXPORT = CompileTimeErrorCode(
'AMBIGUOUS_EXPORT',
"The name '{0}' is defined in the libraries '{1}' and '{2}'.",
correction: "Try removing the export of one of the libraries, or "
"explicitly hiding the name in one of the export directives.");
/**
* Parameters:
* 0: the name of the member
* 1: the name of the first declaring extension
* 2: the name of the second declaring extension
*/
// #### Description
//
// When code refers to a member of an object (for example, `o.m()` or `o.m` or
// `o[i]`) where the static type of `o` doesn't declare the member (`m` or
// `[]`, for example), then the analyzer tries to find the member in an
// extension. For example, if the member is `m`, then the analyzer looks for
// extensions that declare a member named `m` and have an extended type that
// the static type of `o` can be assigned to. When there's more than one such
// extension in scope, the extension whose extended type is most specific is
// selected.
//
// The analyzer produces this diagnostic when none of the extensions has an
// extended type that's more specific than the extended types of all of the
// other extensions, making the reference to the member ambiguous.
//
// #### Examples
//
// The following code produces this diagnostic because there's no way to
// choose between the member in `E1` and the member in `E2`:
//
// ```dart
// extension E1 on String {
// int get charCount => 1;
// }
//
// extension E2 on String {
// int get charCount => 2;
// }
//
// void f(String s) {
// print(s.[!charCount!]);
// }
// ```
//
// #### Common fixes
//
// If you don't need both extensions, then you can delete or hide one of them.
//
// If you need both, then explicitly select the one you want to use by using
// an extension override:
//
// ```dart
// extension E1 on String {
// int get charCount => length;
// }
//
// extension E2 on String {
// int get charCount => length;
// }
//
// void f(String s) {
// print(E2(s).charCount);
// }
// ```
/*
* TODO(brianwilkerson) This message doesn't handle the possible case where
* there are more than 2 extensions, nor does it handle well the case where
* one or more of the extensions is unnamed.
*/
static const CompileTimeErrorCode AMBIGUOUS_EXTENSION_MEMBER_ACCESS =
CompileTimeErrorCode(
'AMBIGUOUS_EXTENSION_MEMBER_ACCESS',
"A member named '{0}' is defined in extensions '{1}' and '{2}' and "
"neither is more specific.",
correction:
"Try using an extension override to specify the extension "
"you want to to be chosen.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the ambiguous type
* 1: the name of the first library that the type is found
* 2: the name of the second library that the type is found
*/
// #### Description
//
// The analyzer produces this diagnostic when a name is referenced that is
// declared in two or more imported libraries.
//
// #### Examples
//
// Given a library (`a.dart`) that defines a class (`C` in this example):
//
// ```dart
// %uri="lib/a.dart"
// class A {}
// class C {}
// ```
//
// And a library (`b.dart`) that defines a different class with the same name:
//
// ```dart
// %uri="lib/b.dart"
// class B {}
// class C {}
// ```
//
// The following code produces this diagnostic:
//
// ```dart
// import 'a.dart';
// import 'b.dart';
//
// void f([!C!] c1, [!C!] c2) {}
// ```
//
// #### Common fixes
//
// If any of the libraries aren't needed, then remove the import directives
// for them:
//
// ```dart
// import 'a.dart';
//
// void f(C c1, C c2) {}
// ```
//
// If the name is still defined by more than one library, then add a `hide`
// clause to the import directives for all except one library:
//
// ```dart
// import 'a.dart' hide C;
// import 'b.dart';
//
// void f(C c1, C c2) {}
// ```
//
// If you must be able to reference more than one of these types, then add a
// prefix to each of the import directives, and qualify the references with
// the appropriate prefix:
//
// ```dart
// import 'a.dart' as a;
// import 'b.dart' as b;
//
// void f(a.C c1, b.C c2) {}
// ```
static const CompileTimeErrorCode AMBIGUOUS_IMPORT = CompileTimeErrorCode(
'AMBIGUOUS_IMPORT', "The name '{0}' is defined in the libraries {1}.",
correction: "Try using 'as prefix' for one of the import directives, or "
"hiding the name from all but one of the imports.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// Because map and set literals use the same delimiters (`{` and `}`), the
// analyzer looks at the type arguments and the elements to determine which
// kind of literal you meant. When there are no type arguments and all of the
// elements are spread elements (which are allowed in both kinds of literals),
// then the analyzer uses the types of the expressions that are being spread.
// If all of the expressions have the type `Iterable`, then it's a set
// literal; if they all have the type `Map`, then it's a map literal.
//
// The analyzer produces this diagnostic when some of the expressions being
// spread have the type `Iterable` and others have the type `Map`, making it
// impossible for the analyzer to determine whether you are writing a map
// literal or a set literal.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// union(Map<String, String> a, List<String> b, Map<String, String> c) =>
// [!{...a, ...b, ...c}!];
// ```
//
// The list `b` can only be spread into a set, and the maps `a` and `c` can
// only be spread into a map, and the literal can't be both.
//
// #### Common fixes
//
// There are two common ways to fix this problem. The first is to remove all
// of the spread elements of one kind or another, so that the elements are
// consistent. In this case, that likely means removing the list and deciding
// what to do about the now unused parameter:
//
// ```dart
// union(Map<String, String> a, List<String> b, Map<String, String> c) =>
// {...a, ...c};
// ```
//
// The second fix is to change the elements of one kind into elements that are
// consistent with the other elements. For example, you can add the elements
// of the list as keys that map to themselves:
//
// ```dart
// union(Map<String, String> a, List<String> b, Map<String, String> c) =>
// {...a, for (String s in b) s: s, ...c};
// ```
static const CompileTimeErrorCode AMBIGUOUS_SET_OR_MAP_LITERAL_BOTH =
CompileTimeErrorCode(
'AMBIGUOUS_SET_OR_MAP_LITERAL_BOTH',
"This literal contains both 'Map' and 'Iterable' spreads, "
"which makes it impossible to determine whether the literal is "
"a map or a set.",
correction:
"Try removing or changing some of the elements so that all of "
"the elements are consistent.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// Because map and set literals use the same delimiters (`{` and `}`), the
// analyzer looks at the type arguments and the elements to determine which
// kind of literal you meant. When there are no type arguments and all of the
// elements are spread elements (which are allowed in both kinds of literals)
// then the analyzer uses the types of the expressions that are being spread.
// If all of the expressions have the type `Iterable`, then it's a set
// literal; if they all have the type `Map`, then it's a map literal.
//
// This diagnostic is produced when none of the expressions being spread have
// a type that allows the analyzer to decide whether you were writing a map
// literal or a set literal.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// union(a, b) => [!{...a, ...b}!];
// ```
//
// The problem occurs because there are no type arguments, and there is no
// information about the type of either `a` or `b`.
//
// #### Common fixes
//
// There are three common ways to fix this problem. The first is to add type
// arguments to the literal. For example, if the literal is intended to be a
// map literal, you might write something like this:
//
// ```dart
// union(a, b) => <String, String>{...a, ...b};
// ```
//
// The second fix is to add type information so that the expressions have
// either the type `Iterable` or the type `Map`. You can add an explicit cast
// or, in this case, add types to the declarations of the two parameters:
//
// ```dart
// union(List<int> a, List<int> b) => {...a, ...b};
// ```
//
// The third fix is to add context information. In this case, that means
// adding a return type to the function:
//
// ```dart
// Set<String> union(a, b) => {...a, ...b};
// ```
//
// In other cases, you might add a type somewhere else. For example, say the
// original code looks like this:
//
// ```dart
// union(a, b) {
// var x = [!{...a, ...b}!];
// return x;
// }
// ```
//
// You might add a type annotation on `x`, like this:
//
// ```dart
// union(a, b) {
// Map<String, String> x = {...a, ...b};
// return x;
// }
// ```
static const CompileTimeErrorCode AMBIGUOUS_SET_OR_MAP_LITERAL_EITHER =
CompileTimeErrorCode(
'AMBIGUOUS_SET_OR_MAP_LITERAL_EITHER',
"This literal must be either a map or a set, but the elements don't "
"have enough information for type inference to work.",
correction:
"Try adding type arguments to the literal (one for sets, two "
"for maps).",
hasPublishedDocs: true);
/**
* 15 Metadata: The constant expression given in an annotation is type checked
* and evaluated in the scope surrounding the declaration being annotated.
*
* 16.12.2 Const: It is a compile-time error if <i>T</i> is not a class
* accessible in the current scope, optionally followed by type arguments.
*
* 16.12.2 Const: If <i>e</i> is of the form <i>const T.id(a<sub>1</sub>,
* &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
* x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a compile-time error if
* <i>T</i> is not a class accessible in the current scope, optionally
* followed by type arguments.
*
* Parameters:
* 0: the name of the non-type element
*/
static const CompileTimeErrorCode ANNOTATION_WITH_NON_CLASS =
CompileTimeErrorCode(
'ANNOTATION_WITH_NON_CLASS', "The name '{0}' isn't a class.",
correction: "Try importing the library that declares the class, "
"correcting the name to match a defined class, or "
"defining a class with the given name.");
/**
* Parameters:
* 0: the name of the actual argument type
* 1: the name of the expected type
*/
// #### Description
//
// The analyzer produces this diagnostic when the static type of an argument
// can't be assigned to the static type of the corresponding parameter.
//
// #### Examples
//
// The following code produces this diagnostic because a `num` can't be
// assigned to a `String`:
//
// ```dart
// String f(String x) => x;
// String g(num y) => f([!y!]);
// ```
//
// #### Common fixes
//
// If possible, rewrite the code so that the static type is assignable. In the
// example above you might be able to change the type of the parameter `y`:
//
// ```dart
// String f(String x) => x;
// String g(String y) => f(y);
// ```
//
// If that fix isn't possible, then add code to handle the case where the
// argument value isn't the required type. One approach is to coerce other
// types to the required type:
//
// ```dart
// String f(String x) => x;
// String g(num y) => f(y.toString());
// ```
//
// Another approach is to add explicit type tests and fallback code:
//
// ```dart
// String f(String x) => x;
// String g(num y) => f(y is String ? y : '');
// ```
//
// If you believe that the runtime type of the argument will always be the
// same as the static type of the parameter, and you're willing to risk having
// an exception thrown at runtime if you're wrong, then add an explicit cast:
//
// ```dart
// String f(String x) => x;
// String g(num y) => f(y as String);
// ```
static const CompileTimeErrorCode ARGUMENT_TYPE_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'ARGUMENT_TYPE_NOT_ASSIGNABLE',
"The argument type '{0}' can't be assigned to the parameter type "
"'{1}'.",
hasPublishedDocs: true);
static const CompileTimeErrorCode ASSERT_IN_REDIRECTING_CONSTRUCTOR =
CompileTimeErrorCode('ASSERT_IN_REDIRECTING_CONSTRUCTOR',
"A redirecting constructor can't have an 'assert' initializer.");
/**
* 5 Variables: Attempting to assign to a final variable elsewhere will cause
* a NoSuchMethodError to be thrown, because no setter is defined for it. The
* assignment will also give rise to a static warning for the same reason.
*
* A constant variable is always implicitly final.
*/
static const CompileTimeErrorCode ASSIGNMENT_TO_CONST = CompileTimeErrorCode(
'ASSIGNMENT_TO_CONST', "Constant variables can't be assigned a value.",
correction: "Try removing the assignment, or "
"remove the modifier 'const' from the variable.");
/**
* Parameters:
* 0: the name of the final variable
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds an invocation of a
// setter, but there's no setter because the field with the same name was
// declared to be `final` or `const`.
//
// #### Examples
//
// The following code produces this diagnostic because `v` is final:
//
// ```dart
// class C {
// final v = 0;
// }
//
// f(C c) {
// c.[!v!] = 1;
// }
// ```
//
// #### Common fixes
//
// If you need to be able to set the value of the field, then remove the
// modifier `final` from the field:
//
// ```dart
// class C {
// int v = 0;
// }
//
// f(C c) {
// c.v = 1;
// }
// ```
static const CompileTimeErrorCode ASSIGNMENT_TO_FINAL = CompileTimeErrorCode(
'ASSIGNMENT_TO_FINAL',
"'{0}' can't be used as a setter because it's final.",
correction: "Try finding a different setter, or making '{0}' non-final.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a local variable that was
// declared to be final is assigned after it was initialized.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is final, so it
// can't have a value assigned to it after it was initialized:
//
// ```dart
// void f() {
// final x = 0;
// [!x!] = 3;
// print(x);
// }
// ```
//
// #### Common fixes
//
// Remove the keyword `final`, and replace it with `var` if there's no type
// annotation:
//
// ```dart
// void f() {
// var x = 0;
// x = 3;
// print(x);
// }
// ```
static const CompileTimeErrorCode ASSIGNMENT_TO_FINAL_LOCAL =
CompileTimeErrorCode('ASSIGNMENT_TO_FINAL_LOCAL',
"The final variable '{0}' can only be set once.",
correction: "Try making '{0}' non-final.", hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a reference to a setter is
// found; there is no setter defined for the type; but there is a getter
// defined with the same name.
//
// #### Examples
//
// The following code produces this diagnostic because there is no setter
// named `x` in `C`, but there is a getter named `x`:
//
// ```dart
// class C {
// int get x => 0;
// set y(int p) {}
// }
//
// void f(C c) {
// c.[!x!] = 1;
// }
// ```
//
// #### Common fixes
//
// If you want to invoke an existing setter, then correct the name:
//
// ```dart
// class C {
// int get x => 0;
// set y(int p) {}
// }
//
// void f(C c) {
// c.y = 1;
// }
// ```
//
// If you want to invoke the setter but it just doesn't exist yet, then
// declare it:
//
// ```dart
// class C {
// int get x => 0;
// set x(int p) {}
// set y(int p) {}
// }
//
// void f(C c) {
// c.x = 1;
// }
// ```
static const CompileTimeErrorCode ASSIGNMENT_TO_FINAL_NO_SETTER =
CompileTimeErrorCode('ASSIGNMENT_TO_FINAL_NO_SETTER',
"There isn’t a setter named '{0}' in class '{1}'.",
correction:
"Try correcting the name to reference an existing setter, or "
"declare the setter.",
hasPublishedDocs: true);
/**
* 12.18 Assignment: It is as static warning if an assignment of the form
* <i>v = e</i> occurs inside a top level or static function (be it function,
* method, getter, or setter) or variable initializer and there is neither a
* local variable declaration with name <i>v</i> nor setter declaration with
* name <i>v=</i> in the lexical scope enclosing the assignment.
*/
static const CompileTimeErrorCode ASSIGNMENT_TO_FUNCTION =
CompileTimeErrorCode(
'ASSIGNMENT_TO_FUNCTION', "Functions can't be assigned a value.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the target of an assignment is a
// method.
//
// #### Examples
//
// The following code produces this diagnostic because `f` can't be assigned a
// value because it's a method:
//
// ```dart
// class C {
// void f() {}
//
// void g() {
// [!f!] = null;
// }
// }
// ```
//
// #### Common fixes
//
// Rewrite the code so that there isn't an assignment to a method.
static const CompileTimeErrorCode ASSIGNMENT_TO_METHOD = CompileTimeErrorCode(
'ASSIGNMENT_TO_METHOD', "Methods can't be assigned a value.",
hasPublishedDocs: true);
/**
* 12.18 Assignment: It is as static warning if an assignment of the form
* <i>v = e</i> occurs inside a top level or static function (be it function,
* method, getter, or setter) or variable initializer and there is neither a
* local variable declaration with name <i>v</i> nor setter declaration with
* name <i>v=</i> in the lexical scope enclosing the assignment.
*/
static const CompileTimeErrorCode ASSIGNMENT_TO_TYPE = CompileTimeErrorCode(
'ASSIGNMENT_TO_TYPE', "Types can't be assigned a value.");
/**
* 17.6.3 Asynchronous For-in: It is a compile-time error if an asynchronous
* for-in statement appears inside a synchronous function.
*/
static const CompileTimeErrorCode ASYNC_FOR_IN_WRONG_CONTEXT =
CompileTimeErrorCode('ASYNC_FOR_IN_WRONG_CONTEXT',
"The async for-in can only be used in an async function.",
correction:
"Try marking the function body with either 'async' or 'async*', "
"or removing the 'await' before the for loop.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a local variable that has the
// 'late' modifier uses an 'await' expression in the initializer.
//
// #### Example
//
// The following code produces this diagnostic because an 'await' expression
// is used in the initializer for 'v', a local variable that is marked 'late':
//
// ```dart
// %experiments=non-nullable
// Future<int> f() async {
// late v = [!await!] 42;
// return v;
// }
// ```
//
// #### Common fixes
//
// If the initializer can be rewritten to not use 'await', then rewrite it:
//
// ```dart
// %experiments=non-nullable
// Future<int> f() async {
// late v = 42;
// return v;
// }
// ```
//
// If the initializer can't be rewritten, then remove the 'late' modifier:
//
// ```dart
// %experiments=non-nullable
// Future<int> f() async {
// var v = await 42;
// return v;
// }
// ```
static const CompileTimeErrorCode AWAIT_IN_LATE_LOCAL_VARIABLE_INITIALIZER =
CompileTimeErrorCode(
'AWAIT_IN_LATE_LOCAL_VARIABLE_INITIALIZER',
"The 'await' expression can't be used in a 'late' local variable's "
"initializer.",
correction:
"Try removing the 'late' modifier, or rewriting the initializer "
"without using the 'await' expression.");
/**
* 16.30 Await Expressions: It is a compile-time error if the function
* immediately enclosing _a_ is not declared asynchronous. (Where _a_ is the
* await expression.)
*/
static const CompileTimeErrorCode AWAIT_IN_WRONG_CONTEXT =
CompileTimeErrorCode('AWAIT_IN_WRONG_CONTEXT',
"The await expression can only be used in an async function.",
correction:
"Try marking the function body with either 'async' or 'async*'.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function has a
// return type that's [potentially non-nullable][] but would implicitly return
// `null` if control reached the end of the function.
//
// #### Example
//
// The following code produces this diagnostic because the method `m` has an
// implicit return of `null` inserted at the end of the method, but the method
// is declared to not return `null`:
//
// ```dart
// %experiments=non-nullable
// class C {
// int [!m!](int t) {
// print(t);
// }
// }
// ```
//
// The following code produces this diagnostic because the method `m` has an
// implicit return of `null` inserted at the end of the method, but because
// the class `C` can be instantiated with a non-nullable type argument, the
// method is effectively declared to not return `null`:
//
// ```dart
// %experiments=non-nullable
// class C<T> {
// T [!m!](T t) {
// print(t);
// }
// }
// ```
//
// #### Common fixes
//
// If there's a reasonable value that can be returned, then add a `return`
// statement at the end of the method:
//
// ```dart
// %experiments=non-nullable
// class C<T> {
// T m(T t) {
// print(t);
// return t;
// }
// }
// ```
//
// If the method won't reach the implicit return, then add a `throw` at the
// end of the method:
//
// ```dart
// %experiments=non-nullable
// class C<T> {
// T m(T t) {
// print(t);
// throw '';
// }
// }
// ```
//
// If the method intentionally returns `null` at the end, then change the
// return type so that it's valid to return `null`:
//
// ```dart
// %experiments=non-nullable
// class C<T> {
// T? m(T t) {
// print(t);
// }
// }
// ```
static const CompileTimeErrorCode BODY_MIGHT_COMPLETE_NORMALLY =
CompileTimeErrorCode(
'BODY_MIGHT_COMPLETE_NORMALLY',
"The body might complete normally, causing 'null' to be returned, "
"but the return type is a potentially non-nullable type.",
correction:
"Try adding either a return or a throw statement at the end.",
hasPublishedDocs: true);
static const CompileTimeErrorCode BREAK_LABEL_ON_SWITCH_MEMBER =
CompileTimeErrorCode('BREAK_LABEL_ON_SWITCH_MEMBER',
"Break label resolves to case or default statement");
/**
* Parameters:
* 0: the built-in identifier that is being used
*/
// #### Description
//
// The analyzer produces this diagnostic when the name of an extension is a
// built-in identifier. Built-in identifiers can’t be used as extension names.
//
// #### Examples
//
// The following code produces this diagnostic because `mixin` is a built-in
// identifier:
//
// ```dart
// extension [!mixin!] on int {}
// ```
//
// #### Common fixes
//
// Choose a different name for the extension.
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_EXTENSION_NAME =
CompileTimeErrorCode('BUILT_IN_IDENTIFIER_AS_EXTENSION_NAME',
"The built-in identifier '{0}' can't be used as an extension name.",
correction: "Try choosing a different name for the extension.",
hasPublishedDocs: true);
/**
* 16.33 Identifier Reference: It is a compile-time error if a built-in
* identifier is used as the declared name of a prefix, class, type parameter
* or type alias.
*
* Parameters:
* 0: the built-in identifier that is being used
*/
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_PREFIX_NAME =
CompileTimeErrorCode('BUILT_IN_IDENTIFIER_AS_PREFIX_NAME',
"The built-in identifier '{0}' can't be used as a prefix name.",
correction: "Try choosing a different name for the prefix.");
/**
* Parameters:
* 0: the built-in identifier that is being used
*/
// #### Description
//
// The analyzer produces this diagnostic when a built-in identifier is used
// where a type name is expected.
//
// #### Examples
//
// The following code produces this diagnostic because `import` can't be used
// as a type because it's a built-in identifier:
//
// ```dart
// [!import!]<int> x;
// ```
//
// #### Common fixes
//
// Replace the built-in identifier with the name of a valid type:
//
// ```dart
// List<int> x;
// ```
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE =
CompileTimeErrorCode('BUILT_IN_IDENTIFIER_AS_TYPE',
"The built-in identifier '{0}' can't be used as a type.",
correction: "Try correcting the name to match an existing type.",
hasPublishedDocs: true);
/**
* 16.33 Identifier Reference: It is a compile-time error if a built-in
* identifier is used as the declared name of a prefix, class, type parameter
* or type alias.
*
* Parameters:
* 0: the built-in identifier that is being used
*/
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_NAME =
CompileTimeErrorCode('BUILT_IN_IDENTIFIER_AS_TYPE_NAME',
"The built-in identifier '{0}' can't be used as a type name.",
correction: "Try choosing a different name for the type.");
/**
* 16.33 Identifier Reference: It is a compile-time error if a built-in
* identifier is used as the declared name of a prefix, class, type parameter
* or type alias.
*
* Parameters:
* 0: the built-in identifier that is being used
*/
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME =
CompileTimeErrorCode(
'BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME',
"The built-in identifier '{0}' can't be used as a type parameter "
"name.",
correction: "Try choosing a different name for the type parameter.");
/**
* 16.33 Identifier Reference: It is a compile-time error if a built-in
* identifier is used as the declared name of a prefix, class, type parameter
* or type alias.
*
* Parameters:
* 0: the built-in identifier that is being used
*/
static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME =
CompileTimeErrorCode('BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME',
"The built-in identifier '{0}' can't be used as a typedef name.",
correction: "Try choosing a different name for the typedef.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the last statement in a `case`
// block isn't one of the required terminators: `break`, `continue`,
// `rethrow`, `return`, or `throw`.
//
// #### Examples
//
// The following code produces this diagnostic because the `case` block ends
// with an assignment:
//
// ```dart
// void f(int x) {
// switch (x) {
// [!case!] 0:
// x += 2;
// default:
// x += 1;
// }
// }
// ```
//
// #### Common fixes
//
// Add one of the required terminators:
//
// ```dart
// void f(int x) {
// switch (x) {
// case 0:
// x += 2;
// break;
// default:
// x += 1;
// }
// }
// ```
static const CompileTimeErrorCode CASE_BLOCK_NOT_TERMINATED =
CompileTimeErrorCode(
'CASE_BLOCK_NOT_TERMINATED',
"The last statement of the 'case' should be 'break', 'continue', "
"'rethrow', 'return', or 'throw'.",
correction: "Try adding one of the required statements.",
hasPublishedDocs: true);
/**
* 13.9 Switch: It is a compile-time error if the class <i>C</i> implements
* the operator <i>==</i>.
*
* Parameters:
* 0: the this of the switch case expression
*/
static const CompileTimeErrorCode CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS =
CompileTimeErrorCode(
'CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS',
"The switch case expression type '{0}' can't override the == "
"operator.");
/**
* Parameters:
* 0: the type of the case expression
* 1: the type of the switch expression
*/
// #### Description
//
// The analyzer produces this diagnostic when the expression following `case`
// in a `switch` statement has a static type that isn't a subtype of the
// static type of the expression following `switch`.
//
// #### Example
//
// The following code produces this diagnostic because `1` is an `int`, which
// isn't a subtype of `String` (the type of `s`):
//
// ```dart
// %experiments=non-nullable
// void f(String s) {
// switch (s) {
// case [!1!]:
// break;
// }
// }
// ```
//
// #### Common fixes
//
// If the value of the `case` expression is wrong, then change the `case`
// expression so that it has the required type:
//
// ```dart
// %experiments=non-nullable
// void f(String s) {
// switch (s) {
// case '1':
// break;
// }
// }
// ```
//
// If the value of the `case` expression is correct, then change the `switch`
// expression to have the required type:
//
// ```dart
// %experiments=non-nullable
// void f(int s) {
// switch (s) {
// case 1:
// break;
// }
// }
// ```
static const CompileTimeErrorCode
CASE_EXPRESSION_TYPE_IS_NOT_SWITCH_EXPRESSION_SUBTYPE =
CompileTimeErrorCode(
'CASE_EXPRESSION_TYPE_IS_NOT_SWITCH_EXPRESSION_SUBTYPE',
"The switch case expression type '{0}' must be a subtype of the "
"switch expression type '{1}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the name following the `as` in a
// cast expression is defined to be something other than a type.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is a variable, not
// a type:
//
// ```dart
// num x = 0;
// int y = x as [!x!];
// ```
//
// #### Common fixes
//
// Replace the name with the name of a type:
//
// ```dart
// num x = 0;
// int y = x as int;
// ```
static const CompileTimeErrorCode CAST_TO_NON_TYPE = CompileTimeErrorCode(
'CAST_TO_NON_TYPE',
"The name '{0}' isn't a type, so it can't be used in an 'as' expression.",
correction: "Try changing the name to the name of an existing type, or "
"creating a type with the name '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the abstract method
* 1: the name of the enclosing class
*/
// #### Description
//
// The analyzer produces this diagnostic when a member of a concrete class is
// found that doesn't have a concrete implementation. Concrete classes aren't
// allowed to contain abstract members.
//
// #### Examples
//
// The following code produces this diagnostic because `m` is an abstract
// method but `C` isn't an abstract class:
//
// ```dart
// class C {
// [!void m();!]
// }
// ```
//
// #### Common fixes
//
// If it's valid to create instances of the class, provide an implementation
// for the member:
//
// ```dart
// class C {
// void m() {}
// }
// ```
//
// If it isn't valid to create instances of the class, mark the class as being
// abstract:
//
// ```dart
// abstract class C {
// void m();
// }
// ```
static const CompileTimeErrorCode CONCRETE_CLASS_WITH_ABSTRACT_MEMBER =
CompileTimeErrorCode('CONCRETE_CLASS_WITH_ABSTRACT_MEMBER',
"'{0}' must have a method body because '{1}' isn't abstract.",
correction: "Try making '{1}' abstract, or adding a body to '{0}'.",
hasPublishedDocs: true);
/**
* 10.11 Class Member Conflicts: Let `C` be a class. It is a compile-time
* error if `C` declares a constructor named `C.n`, and a static member with
* basename `n`.
*
* Parameters:
* 0: the name of the constructor
*/
static const CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_AND_STATIC_FIELD =
CompileTimeErrorCode(
'CONFLICTING_CONSTRUCTOR_AND_STATIC_FIELD',
"'{0}' can't be used to name both a constructor and a static field "
"in this class.",
correction: "Try renaming either the constructor or the field.");
/**
* 10.11 Class Member Conflicts: Let `C` be a class. It is a compile-time
* error if `C` declares a constructor named `C.n`, and a static member with
* basename `n`.
*
* Parameters:
* 0: the name of the constructor
*/
static const CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_AND_STATIC_METHOD =
CompileTimeErrorCode(
'CONFLICTING_CONSTRUCTOR_AND_STATIC_METHOD',
"'{0}' can't be used to name both a constructor and a static method "
"in this class.",
correction: "Try renaming either the constructor or the method.");
/**
* 10.11 Class Member Conflicts: Let `C` be a class. It is a compile-time
* error if `C` declares a getter or a setter with basename `n`, and has a
* method named `n`.
*
* Parameters:
* 0: the name of the class defining the conflicting field
* 1: the name of the conflicting field
* 2: the name of the class defining the method with which the field conflicts
*/
static const CompileTimeErrorCode CONFLICTING_FIELD_AND_METHOD =
CompileTimeErrorCode(
'CONFLICTING_FIELD_AND_METHOD',
"Class '{0}' can't define field '{1}' and have method '{2}.{1}' "
"with the same name.",
correction: "Try converting the getter to a method, or "
"renaming the field to a name that doesn't conflict.");
/**
* Parameters:
* 0: the name of the type parameter
* 1: detail text explaining why the type could not be inferred
*/
static const CompileTimeErrorCode COULD_NOT_INFER = CompileTimeErrorCode(
'COULD_NOT_INFER', "Couldn't infer type parameter '{0}'.{1}");
/**
* 10.10 Superinterfaces: It is a compile-time error if a class `C` has two
* superinterfaces that are different instantiations of the same generic
* class. For example, a class may not have both `List<int>` and `List<num>`
* as superinterfaces.
*
* Parameters:
* 0: the name of the class implementing the conflicting interface
* 1: the first conflicting type
* 2: the second conflicting type
*/
static const CompileTimeErrorCode CONFLICTING_GENERIC_INTERFACES =
CompileTimeErrorCode(
'CONFLICTING_GENERIC_INTERFACES',
"The class '{0}' cannot implement both '{1}' and '{2}' because the "
"type arguments are different.");
/**
* 10.11 Class Member Conflicts: Let `C` be a class. It is a compile-time
* error if `C` declares a method named `n`, and has a getter or a setter
* with basename `n`.
*
* Parameters:
* 0: the name of the class defining the conflicting method
* 1: the name of the conflicting method
* 2: the name of the class defining the field with which the method conflicts
*/
static const CompileTimeErrorCode CONFLICTING_METHOD_AND_FIELD =
CompileTimeErrorCode(
'CONFLICTING_METHOD_AND_FIELD',
"Class '{0}' can't define method '{1}' and have field '{2}.{1}' "
"with the same name.",
correction: "Try converting the method to a getter, or "
"renaming the method to a name that doesn't conflict.");
/**
* 10.11 Class Member Conflicts: Let `C` be a class. It is a compile-time
* error if `C` declares a static member with basename `n`, and has an
* instance member with basename `n`.
*
* Parameters:
* 0: the name of the class defining the conflicting member
* 1: the name of the conflicting static member
* 2: the name of the class defining the field with which the method conflicts
*/
static const CompileTimeErrorCode CONFLICTING_STATIC_AND_INSTANCE =
CompileTimeErrorCode(
'CONFLICTING_STATIC_AND_INSTANCE',
"Class '{0}' can't define static member '{1}' and have instance "
"member '{2}.{1}' with the same name.",
correction:
"Try renaming the member to a name that doesn't conflict.");
/**
* 7. Classes: It is a compile time error if a generic class declares a type
* variable with the same name as the class or any of its members or
* constructors.
*
* Parameters:
* 0: the name of the type variable
*/
static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_CLASS =
CompileTimeErrorCodeWithUniqueName(
'CONFLICTING_TYPE_VARIABLE_AND_CONTAINER',
'CONFLICTING_TYPE_VARIABLE_AND_CLASS',
"'{0}' can't be used to name both a type variable and the class in "
"which the type variable is defined.",
correction: "Try renaming either the type variable or the class.");
/**
* It is a compile time error if an extension declares a type parameter with
* the same name as the extension.
*
* Parameters:
* 0: the name of the type variable
*/
static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_EXTENSION =
CompileTimeErrorCodeWithUniqueName(
'CONFLICTING_TYPE_VARIABLE_AND_CONTAINER',
'CONFLICTING_TYPE_VARIABLE_AND_EXTENSION',
"'{0}' can't be used to name both a type variable and the extension "
"in which the type variable is defined.",
correction:
"Try renaming either the type variable or the extension.");
/**
* 7. Classes: It is a compile time error if a generic class declares a type
* variable with the same name as the class or any of its members or
* constructors.
*
* Parameters:
* 0: the name of the type variable
*/
static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_MEMBER_CLASS =
CompileTimeErrorCodeWithUniqueName(
'CONFLICTING_TYPE_VARIABLE_AND_MEMBER',
'CONFLICTING_TYPE_VARIABLE_AND_MEMBER_CLASS',
"'{0}' can't be used to name both a type variable and a member in "
"this class.",
correction: "Try renaming either the type variable or the member.");
/**
* It is a compile time error if a generic extension declares a member with
* the same basename as the name of any of the extension's type parameters.
*/
static const CompileTimeErrorCode
CONFLICTING_TYPE_VARIABLE_AND_MEMBER_EXTENSION =
CompileTimeErrorCodeWithUniqueName(
'CONFLICTING_TYPE_VARIABLE_AND_MEMBER',
'CONFLICTING_TYPE_VARIABLE_AND_MEMBER_EXTENSION',
"'{0}' can't be used to name both a type variable and a member in "
"this extension.",
correction: "Try renaming either the type variable or the member.");
/**
* 16.12.2 Const: It is a compile-time error if evaluation of a constant
* object results in an uncaught exception being thrown.
*/
static const CompileTimeErrorCode CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH =
CompileTimeErrorCode(
'CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH',
"In a const constructor, a value of type '{0}' can't be assigned to the "
"field '{1}', which has type '{2}'.",
correction: "Try using a subtype, or removing the keyword 'const'.",
);
/**
* Parameters:
* 0: The type of the runtime value of the argument
* 1: The static type of the parameter
*/
// #### Description
//
// The analyzer produces this diagnostic when the runtime type of a constant
// value can't be assigned to the static type of a constant constructor's
// parameter.
//
// #### Example
//
// The following code produces this diagnostic because the runtime type of `i`
// is `int`, which can't be assigned to the static type of `s`:
//
// ```dart
// class C {
// final String s;
//
// const C(this.s);
// }
//
// const dynamic i = 0;
//
// void f() {
// const C([!i!]);
// }
// ```
//
// #### Common fixes
//
// Pass a value of the correct type to the constructor:
//
// ```dart
// class C {
// final String s;
//
// const C(this.s);
// }
//
// const dynamic i = 0;
//
// void f() {
// const C('$i');
// }
// ```
static const CompileTimeErrorCode CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH =
CompileTimeErrorCode(
'CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH',
"A value of type '{0}' can't be assigned to a parameter of type "
"'{1}' in a const constructor.",
correction: "Try using a subtype, or removing the keyword 'const'.",
hasPublishedDocs: true);
/**
* 16.12.2 Const: It is a compile-time error if evaluation of a constant
* object results in an uncaught exception being thrown.
*/
static const CompileTimeErrorCode CONST_CONSTRUCTOR_THROWS_EXCEPTION =
CompileTimeErrorCode('CONST_CONSTRUCTOR_THROWS_EXCEPTION',
"Const constructors can't throw exceptions.",
correction: "Try removing the throw statement, or "
"removing the keyword 'const'.");
/**
* Parameters:
* 0: the name of the field
*/
// #### Description
//
// The analyzer produces this diagnostic when a constructor has the keyword
// `const`, but a field in the class is initialized to a non-constant value.
//
// #### Example
//
// The following code produces this diagnostic because the field `s` is
// initialized to a non-constant value:
//
// ```dart
// class C {
// final String s = 3.toString();
// [!const!] C();
// }
// ```
//
// #### Common fixes
//
// If the field can be initialized to a constant value, then change the
// initializer to a constant expression:
//
// ```dart
// class C {
// final String s = '3';
// const C();
// }
// ```
//
// If the field can't be initialized to a constant value, then remove the
// keyword `const` from the constructor:
//
// ```dart
// class C {
// final String s = 3.toString();
// C();
// }
// ```
static const CompileTimeErrorCode
CONST_CONSTRUCTOR_WITH_FIELD_INITIALIZED_BY_NON_CONST =
CompileTimeErrorCode(
'CONST_CONSTRUCTOR_WITH_FIELD_INITIALIZED_BY_NON_CONST',
"Can't define the 'const' constructor because the field '{0}' is "
"initialized with a non-constant value.",
correction: "Try initializing the field to a constant value, or "
"removing the keyword 'const' from the constructor.");
/**
* 7.6.3 Constant Constructors: The superinitializer that appears, explicitly
* or implicitly, in the initializer list of a constant constructor must
* specify a constant constructor of the superclass of the immediately
* enclosing class or a compile-time error occurs.
*
* 12.1 Mixin Application: For each generative constructor named ... an
* implicitly declared constructor named ... is declared. If Sq is a
* generative const constructor, and M does not declare any fields, Cq is
* also a const constructor.
*
* Parameters:
* 0: the name of the instance field.
*/
static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELD =
CompileTimeErrorCodeWithUniqueName(
'CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELD',
'CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELD',
"This constructor can't be declared 'const' because a mixin adds the "
"instance field: {0}.",
correction: "Try removing the 'const' keyword or removing the 'with' "
"clause from the class declaration, or removing the field from "
"the mixin class.");
/**
* 7.6.3 Constant Constructors: The superinitializer that appears, explicitly
* or implicitly, in the initializer list of a constant constructor must
* specify a constant constructor of the superclass of the immediately
* enclosing class or a compile-time error occurs.
*
* 12.1 Mixin Application: For each generative constructor named ... an
* implicitly declared constructor named ... is declared. If Sq is a
* generative const constructor, and M does not declare any fields, Cq is
* also a const constructor.
*
* Parameters:
* 0: the names of the instance fields.
*/
static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELDS =
CompileTimeErrorCodeWithUniqueName(
'CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELD',
'CONST_CONSTRUCTOR_WITH_MIXIN_WITH_FIELDS',
"This constructor can't be declared 'const' because the mixins add "
"the instance fields: {0}.",
correction: "Try removing the 'const' keyword or removing the 'with' "
"clause from the class declaration, or removing the fields from "
"the mixin classes.");
/**
* 7.6.3 Constant Constructors: The superinitializer that appears, explicitly
* or implicitly, in the initializer list of a constant constructor must
* specify a constant constructor of the superclass of the immediately
* enclosing class or a compile-time error occurs.
*
* Parameters:
* 0: the name of the superclass
*/
static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER =
CompileTimeErrorCode(
'CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER',
"Constant constructor can't call non-constant super constructor of "
"'{0}'.",
correction: "Try calling a const constructor in the superclass, or "
"removing the keyword 'const' from the constructor.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a constructor is marked as a
// const constructor, but the constructor is defined in a class that has at
// least one non-final instance field (either directly or by inheritance).
//
// #### Examples
//
// The following code produces this diagnostic because the field `x` isn't
// final:
//
// ```dart
// class C {
// int x;
//
// const [!C!](this.x);
// }
// ```
//
// #### Common fixes
//
// If it's possible to mark all of the fields as final, then do so:
//
// ```dart
// class C {
// final int x;
//
// const C(this.x);
// }
// ```
//
// If it isn't possible to mark all of the fields as final, then remove the
// keyword `const` from the constructor:
//
// ```dart
// class C {
// int x;
//
// C(this.x);
// }
// ```
static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD =
CompileTimeErrorCode('CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD',
"Can't define a const constructor for a class with non-final fields.",
correction: "Try making all of the fields final, or "
"removing the keyword 'const' from the constructor.",
hasPublishedDocs: true);
/**
* 12.12.2 Const: It is a compile-time error if <i>T</i> is a deferred type.
*/
static const CompileTimeErrorCode CONST_DEFERRED_CLASS = CompileTimeErrorCode(
'CONST_DEFERRED_CLASS', "Deferred classes can't be created with 'const'.",
correction: "Try using 'new' to create the instance, or "
"changing the import to not be deferred.");
/**
* 16.12.2 Const: It is a compile-time error if evaluation of a constant
* object results in an uncaught exception being thrown.
*/
static const CompileTimeErrorCode CONST_EVAL_THROWS_EXCEPTION =
CompileTimeErrorCode('CONST_EVAL_THROWS_EXCEPTION',
"Evaluation of this constant expression throws an exception.");
/**
* 16.12.2 Const: It is a compile-time error if evaluation of a constant
* object results in an uncaught exception being thrown.
*/
static const CompileTimeErrorCode CONST_EVAL_THROWS_IDBZE =
CompileTimeErrorCode(
'CONST_EVAL_THROWS_IDBZE',
"Evaluation of this constant expression throws an "
"IntegerDivisionByZeroException.");
/**
* 16.12.2 Const: An expression of one of the forms !e, e1 && e2 or e1 || e2,
* where e, e1 and e2 are constant expressions that evaluate to a boolean
* value.
*/
static const CompileTimeErrorCode CONST_EVAL_TYPE_BOOL = CompileTimeErrorCode(
'CONST_EVAL_TYPE_BOOL',
"In constant expressions, operands of this operator must be of type "
"'bool'.");
/**
* 16.12.2 Const: An expression of one of the forms !e, e1 && e2 or e1 || e2,
* where e, e1 and e2 are constant expressions that evaluate to a boolean
* value.
*/
static const CompileTimeErrorCode CONST_EVAL_TYPE_BOOL_INT =
CompileTimeErrorCode(
'CONST_EVAL_TYPE_BOOL_INT',
"In constant expressions, operands of this operator must be of type "
"'bool' or 'int'.");
/**
* 16.12.2 Const: An expression of one of the forms e1 == e2 or e1 != e2 where
* e1 and e2 are constant expressions that evaluate to a numeric, string or
* boolean value or to null.
*/
static const CompileTimeErrorCode CONST_EVAL_TYPE_BOOL_NUM_STRING =
CompileTimeErrorCode(
'CONST_EVAL_TYPE_BOOL_NUM_STRING',
"In constant expressions, operands of this operator must be of type "
"'bool', 'num', 'String' or 'null'.");
/**
* 16.12.2 Const: An expression of one of the forms ~e, e1 ^ e2, e1 & e2,
* e1 | e2, e1 >> e2 or e1 << e2, where e, e1 and e2 are constant expressions
* that evaluate to an integer value or to null.
*/
static const CompileTimeErrorCode CONST_EVAL_TYPE_INT = CompileTimeErrorCode(
'CONST_EVAL_TYPE_INT',
"In constant expressions, operands of this operator must be of type "
"'int'.");
/**
* 16.12.2 Const: An expression of one of the forms e, e1 + e2, e1 - e2, e1 *
* e2, e1 / e2, e1 ~/ e2, e1 > e2, e1 < e2, e1 >= e2, e1 <= e2 or e1 % e2,
* where e, e1 and e2 are constant expressions that evaluate to a numeric
* value or to null.
*/
static const CompileTimeErrorCode CONST_EVAL_TYPE_NUM = CompileTimeErrorCode(
'CONST_EVAL_TYPE_NUM',
"In constant expressions, operands of this operator must be of type "
"'num'.");
static const CompileTimeErrorCode CONST_EVAL_TYPE_TYPE = CompileTimeErrorCode(
'CONST_EVAL_TYPE_TYPE',
"In constant expressions, operands of this operator must be of type "
"'Type'.");
/**
* Parameters:
* 0: the name of the type of the initializer expression
* 1: the name of the type of the field
*/
static const CompileTimeErrorCode CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE =
CompileTimeErrorCodeWithUniqueName(
'FIELD_INITIALIZER_NOT_ASSIGNABLE',
'CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE',
"The initializer type '{0}' can't be assigned to the field type "
"'{1}' in a const constructor.",
correction: "Try using a subtype, or removing the 'const' keyword",
hasPublishedDocs: true);
/**
* 6.2 Formal Parameters: It is a compile-time error if a formal parameter is
* declared as a constant variable.
*/
static const CompileTimeErrorCode CONST_FORMAL_PARAMETER =
CompileTimeErrorCode(
'CONST_FORMAL_PARAMETER', "Parameters can't be const.",
correction: "Try removing the 'const' keyword.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a value that isn't statically
// known to be a constant is assigned to a variable that's declared to be a
// 'const' variable.
//
// #### Examples
//
// The following code produces this diagnostic because `x` isn't declared to
// be `const`:
//
// ```dart
// var x = 0;
// const y = [!x!];
// ```
//
// #### Common fixes
//
// If the value being assigned can be declared to be `const`, then change the
// declaration:
//
// ```dart
// const x = 0;
// const y = x;
// ```
//
// If the value can't be declared to be `const`, then remove the `const`
// modifier from the variable, possibly using `final` in its place:
//
// ```dart
// var x = 0;
// final y = x;
// ```
static const CompileTimeErrorCode CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE =
CompileTimeErrorCode('CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE',
"Const variables must be initialized with a constant value.",
correction:
"Try changing the initializer to be a constant expression.",
hasPublishedDocs: true);
/**
* 5 Variables: A constant variable must be initialized to a compile-time
* constant or a compile-time error occurs.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode
CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used to "
"initialized a const variable.",
correction:
"Try initializing the variable without referencing members of "
"the deferred library, or changing the import to not be "
"deferred.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an instance field is marked as
// being const.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is an instance
// field:
//
// ```dart
// class C {
// [!const!] int f = 3;
// }
// ```
//
// #### Common fixes
//
// If the field needs to be an instance field, then remove the keyword
// `const`, or replace it with `final`:
//
// ```dart
// class C {
// final int f = 3;
// }
// ```
//
// If the field really should be a const field, then make it a static field:
//
// ```dart
// class C {
// static const int f = 3;
// }
// ```
static const CompileTimeErrorCode CONST_INSTANCE_FIELD = CompileTimeErrorCode(
'CONST_INSTANCE_FIELD', "Only static fields can be declared as const.",
correction: "Try declaring the field as final, or adding the keyword "
"'static'.",
hasPublishedDocs: true);
/**
* 12.8 Maps: It is a compile-time error if the key of an entry in a constant
* map literal is an instance of a class that implements the operator
* <i>==</i> unless the key is a string or integer.
*
* Parameters:
* 0: the type of the entry's key
*/
static const CompileTimeErrorCode
CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS = CompileTimeErrorCode(
'CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS',
"The constant map entry key expression type '{0}' can't override "
"the == operator.",
correction: "Try using a different value for the key, or "
"removing the keyword 'const' from the map.");
/**
* Parameters:
* 0: the name of the uninitialized final variable
*/
// #### Description
//
// The analyzer produces this diagnostic when a variable that is declared to
// be a constant doesn't have an initializer.
//
// #### Examples
//
// The following code produces this diagnostic because `c` isn't initialized:
//
// ```dart
// const [!c!];
// ```
//
// #### Common fixes
//
// Add an initializer:
//
// ```dart
// const c = 'c';
// ```
static const CompileTimeErrorCode CONST_NOT_INITIALIZED =
CompileTimeErrorCode(
'CONST_NOT_INITIALIZED', "The constant '{0}' must be initialized.",
correction: "Try adding an initialization to the declaration.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the element
*/
static const CompileTimeErrorCode CONST_SET_ELEMENT_TYPE_IMPLEMENTS_EQUALS =
CompileTimeErrorCode(
'CONST_SET_ELEMENT_TYPE_IMPLEMENTS_EQUALS',
"The constant set element type '{0}' can't override "
"the == operator.",
correction: "Try using a different value for the element, or "
"removing the keyword 'const' from the set.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the expression of a spread
// operator in a constant list or set evaluates to something other than a list
// or a set.
//
// #### Examples
//
// The following code produces this diagnostic because the value of `list1` is
// `null`, which is neither a list nor a set:
//
// ```dart
// const List<int> list1 = null;
// const List<int> list2 = [...[!list1!]];
// ```
//
// #### Common fixes
//
// Change the expression to something that evaluates to either a constant list
// or a constant set:
//
// ```dart
// const List<int> list1 = [];
// const List<int> list2 = [...list1];
// ```
static const CompileTimeErrorCode CONST_SPREAD_EXPECTED_LIST_OR_SET =
CompileTimeErrorCode('CONST_SPREAD_EXPECTED_LIST_OR_SET',
"A list or a set is expected in this spread.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the expression of a spread
// operator in a constant map evaluates to something other than a map.
//
// #### Examples
//
// The following code produces this diagnostic because the value of `map1` is
// `null`, which isn't a map:
//
// ```dart
// const Map<String, int> map1 = null;
// const Map<String, int> map2 = {...[!map1!]};
// ```
//
// #### Common fixes
//
// Change the expression to something that evaluates to a constant map:
//
// ```dart
// const Map<String, int> map1 = {};
// const Map<String, int> map2 = {...map1};
// ```
static const CompileTimeErrorCode CONST_SPREAD_EXPECTED_MAP =
CompileTimeErrorCode(
'CONST_SPREAD_EXPECTED_MAP', "A map is expected in this spread.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the keyword `const` is used to
// invoke a constructor that isn't marked with `const`.
//
// #### Examples
//
// The following code produces this diagnostic because the constructor in `A`
// isn't a const constructor:
//
// ```dart
// class A {
// A();
// }
//
// A f() => [!const!] A();
// ```
//
// #### Common fixes
//
// If it's desirable and possible to make the class a constant class (by
// making all of the fields of the class, including inherited fields, final),
// then add the keyword `const` to the constructor:
//
// ```dart
// class A {
// const A();
// }
//
// A f() => const A();
// ```
//
// Otherwise, remove the keyword `const`:
//
// ```dart
// class A {
// A();
// }
//
// A f() => A();
// ```
static const CompileTimeErrorCode CONST_WITH_NON_CONST = CompileTimeErrorCode(
'CONST_WITH_NON_CONST',
"The constructor being called isn't a const constructor.",
correction: "Try removing 'const' from the constructor invocation.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a const constructor is invoked
// with an argument that isn't a constant expression.
//
// #### Examples
//
// The following code produces this diagnostic because `i` isn't a constant:
//
// ```dart
// class C {
// final int i;
// const C(this.i);
// }
// C f(int i) => const C([!i!]);
// ```
//
// #### Common fixes
//
// Either make all of the arguments constant expressions, or remove the
// `const` keyword to use the non-constant form of the constructor:
//
// ```dart
// class C {
// final int i;
// const C(this.i);
// }
// C f(int i) => C(i);
// ```
static const CompileTimeErrorCode CONST_WITH_NON_CONSTANT_ARGUMENT =
CompileTimeErrorCode('CONST_WITH_NON_CONSTANT_ARGUMENT',
"Arguments of a constant creation must be constant expressions.",
correction: "Try making the argument a valid constant, or "
"use 'new' to call the constructor.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the non-type element
*/
static const CompileTimeErrorCode CONST_WITH_NON_TYPE =
CompileTimeErrorCodeWithUniqueName('CREATION_WITH_NON_TYPE',
'CONST_WITH_NON_TYPE', "The name '{0}' isn't a class.",
correction: "Try correcting the name to match an existing class.",
isUnresolvedIdentifier: true);
/**
* 16.12.2 Const: If <i>T</i> is a parameterized type, it is a compile-time
* error if <i>T</i> includes a type variable among its type arguments.
*/
static const CompileTimeErrorCode CONST_WITH_TYPE_PARAMETERS =
CompileTimeErrorCode('CONST_WITH_TYPE_PARAMETERS',
"A constant creation can't use a type parameter as a type argument.",
correction:
"Try replacing the type parameter with a different type.");
/**
* 16.12.2 Const: It is a compile-time error if <i>T.id</i> is not the name of
* a constant constructor declared by the type <i>T</i>.
*
* Parameters:
* 0: the name of the type
* 1: the name of the requested constant constructor
*/
static const CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR =
CompileTimeErrorCode('CONST_WITH_UNDEFINED_CONSTRUCTOR',
"The class '{0}' doesn't have a constant constructor '{1}'.",
correction: "Try calling a different constructor.");
/**
* 16.12.2 Const: It is a compile-time error if <i>T.id</i> is not the name of
* a constant constructor declared by the type <i>T</i>.
*
* Parameters:
* 0: the name of the type
*/
static const CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT =
CompileTimeErrorCode('CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT',
"The class '{0}' doesn't have a default constant constructor.",
correction: "Try calling a different constructor.");
static const CompileTimeErrorCode CONTINUE_LABEL_ON_SWITCH =
CompileTimeErrorCode('CONTINUE_LABEL_ON_SWITCH',
"A continue label resolves to switch, must be loop or switch member");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds a use of the default
// constructor for the class `List` in code that has opted in to null safety.
//
// #### Example
//
// Assuming the following code is opted in to null safety, it produces this
// diagnostic because it uses the default `List` constructor:
//
// ```dart
// %experiments=non-nullable
// var l = [!List<int>!]();
// ```
//
// #### Common fixes
//
// If no initial size is provided, then convert the code to use a list
// literal:
//
// ```dart
// %experiments=non-nullable
// var l = <int>[];
// ```
//
// If an initial size needs to be provided and there is a single reasonable
// initial value for the elements, then use `List.filled`:
//
// ```dart
// %experiments=non-nullable
// var l = List.filled(3, 0);
// ```
//
// If an initial size needs to be provided but each element needs to be
// computed, then use `List.generate`:
//
// ```dart
// %experiments=non-nullable
// var l = List.generate(3, (i) => i);
// ```
static const CompileTimeErrorCode DEFAULT_LIST_CONSTRUCTOR =
CompileTimeErrorCode(
'DEFAULT_LIST_CONSTRUCTOR',
"The default 'List' constructor isn't available when null safety is "
"enabled.",
correction: "Try using a list literal, 'List.filled' or "
"'List.generate'.",
hasPublishedDocs: true);
/**
* 7.6.2 Factories: It is a compile-time error if <i>k</i> explicitly
* specifies a default value for an optional parameter.
*/
static const CompileTimeErrorCode
DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR = CompileTimeErrorCode(
'DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR',
"Default values aren't allowed in factory constructors that redirect "
"to another constructor.",
correction: "Try removing the default value.");
/**
* No parameters.
*/
/* #### Description
//
// The analyzer produces this diagnostic when a named parameter has both the
// `required` modifier and a default value. If the parameter is required, then
// a value for the parameter is always provided at the call sites, so the
// default value can never be used.
//
// #### Examples
//
// The following code generates this diagnostic:
//
// ```dart
// void log({required String [!message!] = 'no message'}) {}
// ```
//
// #### Common fixes
//
// If the parameter is really required, then remove the default value:
//
// ```dart
// void log({required String message}) {}
// ```
//
// If the parameter isn't always required, then remove the `required`
// modifier:
//
// ```dart
// void log({String message = 'no message'}) {}
// ``` */
static const CompileTimeErrorCode DEFAULT_VALUE_ON_REQUIRED_PARAMETER =
CompileTimeErrorCode('DEFAULT_VALUE_ON_REQUIRED_PARAMETER',
"Required named parameters can't have a default value.",
correction: "Try removing either the default value or the 'required' "
"modifier.");
/**
* No parameters.
*/
static const CompileTimeErrorCode DEFERRED_IMPORT_OF_EXTENSION =
CompileTimeErrorCode('DEFERRED_IMPORT_OF_EXTENSION',
"Imports of deferred libraries must hide all extensions",
correction:
"Try adding either a show combinator listing the names you need "
"to reference or a hide combinator listing all of the "
"extensions.");
/**
* Parameters:
* 0: the name of the variable that is invalid
*/
// #### Description
//
// The analyzer produces this diagnostic when
// [definite assignment](https://github.com/dart-lang/language/blob/master/resources/type-system/flow-analysis.md)
// analysis shows that a local variable that's marked as `late` is read before
// being assigned.
//
// #### Example
//
// The following code produces this diagnostic because `x` wasn't assigned a
// value before being read:
//
// ```dart
// %experiments=non-nullable
// void f(bool b) {
// late int x;
// print([!x!]);
// }
// ```
//
// #### Common fixes
//
// Assign a value to the variable before reading from it:
//
// ```dart
// %experiments=non-nullable
// void f(bool b) {
// late int x;
// x = b ? 1 : 0;
// print(x);
// }
// ```
static const CompileTimeErrorCode DEFINITELY_UNASSIGNED_LATE_LOCAL_VARIABLE =
CompileTimeErrorCode(
'DEFINITELY_UNASSIGNED_LATE_LOCAL_VARIABLE',
"The late local variable '{0}' is definitely unassigned at this "
"point.",
correction:
"Ensure that it is assigned on necessary execution paths.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class declares more than one
// unnamed constructor or when it declares more than one constructor with the
// same name.
//
// #### Examples
//
// The following code produces this diagnostic because there are two
// declarations for the unnamed constructor:
//
// ```dart
// class C {
// C();
//
// [!C!]();
// }
// ```
//
// The following code produces this diagnostic because there are two
// declarations for the constructor named `m`:
//
// ```dart
// class C {
// C.m();
//
// [!C.m!]();
// }
// ```
//
// #### Common fixes
//
// If there are multiple unnamed constructors and all of the constructors are
// needed, then give all of them, or all except one of them, a name:
//
// ```dart
// class C {
// C();
//
// C.n();
// }
// ```
//
// If there are multiple unnamed constructors and all except one of them are
// unneeded, then remove the constructors that aren't needed:
//
// ```dart
// class C {
// C();
// }
// ```
//
// If there are multiple named constructors and all of the constructors are
// needed, then rename all except one of them:
//
// ```dart
// class C {
// C.m();
//
// C.n();
// }
// ```
//
// If there are multiple named constructors and all except one of them are
// unneeded, then remove the constructorsthat aren't needed:
//
// ```dart
// class C {
// C.m();
// }
// ```
static const CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_DEFAULT =
CompileTimeErrorCodeWithUniqueName(
'DUPLICATE_CONSTRUCTOR',
'DUPLICATE_CONSTRUCTOR_DEFAULT',
"The default constructor is already defined.",
correction: "Try giving one of the constructors a name.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the duplicate entity
*/
static const CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_NAME =
CompileTimeErrorCodeWithUniqueName(
'DUPLICATE_CONSTRUCTOR',
'DUPLICATE_CONSTRUCTOR_NAME',
"The constructor with name '{0}' is already defined.",
correction: "Try renaming one of the constructors.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the duplicate entity
*/
// #### Description
//
// The analyzer produces this diagnostic when a name is declared, and there is
// a previous declaration with the same name in the same scope.
//
// #### Examples
//
// The following code produces this diagnostic because the name `x` is
// declared twice:
//
// ```dart
// int x = 0;
// int [!x!] = 1;
// ```
//
// #### Common fixes
//
// Choose a different name for one of the declarations.
//
// ```dart
// int x = 0;
// int y = 1;
// ```
static const CompileTimeErrorCode DUPLICATE_DEFINITION = CompileTimeErrorCode(
'DUPLICATE_DEFINITION', "The name '{0}' is already defined.",
correction: "Try renaming one of the declarations.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the parameter that was duplicated
*/
// #### Description
//
// The analyzer produces this diagnostic when an invocation has two or more
// named arguments that have the same name.
//
// #### Examples
//
// The following code produces this diagnostic because there are two arguments
// with the name `a`:
//
// ```dart
// void f(C c) {
// c.m(a: 0, [!a!]: 1);
// }
//
// class C {
// void m({int a, int b}) {}
// }
// ```
//
// #### Common fixes
//
// If one of the arguments should have a different name, then change the name:
//
// ```dart
// void f(C c) {
// c.m(a: 0, b: 1);
// }
//
// class C {
// void m({int a, int b}) {}
// }
// ```
//
// If one of the arguments is wrong, then remove it:
//
// ```dart
// void f(C c) {
// c.m(a: 1);
// }
//
// class C {
// void m({int a, int b}) {}
// }
// ```
static const CompileTimeErrorCode DUPLICATE_NAMED_ARGUMENT =
CompileTimeErrorCode('DUPLICATE_NAMED_ARGUMENT',
"The argument for the named parameter '{0}' was already specified.",
correction: "Try removing one of the named arguments, or "
"correcting one of the names to reference a different named "
"parameter.",
hasPublishedDocs: true);
/**
* 18.3 Parts: It's a compile-time error if the same library contains two part
* directives with the same URI.
*
* Parameters:
* 0: the URI of the duplicate part
*/
static const CompileTimeErrorCode DUPLICATE_PART = CompileTimeErrorCode(
'DUPLICATE_PART',
"The library already contains a part with the uri '{0}'.",
correction:
"Try removing all but one of the duplicated part directives.");
static const CompileTimeErrorCode ENUM_CONSTANT_SAME_NAME_AS_ENCLOSING =
CompileTimeErrorCode('ENUM_CONSTANT_SAME_NAME_AS_ENCLOSING',
"The name of the enum constant can't be the same as the enum's name.",
correction: "Try renaming the constant.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when two elements in a constant set
// literal have the same value. The set can only contain each value once,
// which means that one of the values is unnecessary.
//
// #### Examples
//
// The following code produces this diagnostic because the string `'a'` is
// specified twice:
//
// ```dart
// const Set<String> set = {'a', [!'a'!]};
// ```
//
// #### Common fixes
//
// Remove one of the duplicate values:
//
// ```dart
// const Set<String> set = {'a'};
// ```
//
// Note that literal sets preserve the order of their elements, so the choice
// of which element to remove might affect the order in which elements are
// returned by an iterator.
static const CompileTimeErrorCode EQUAL_ELEMENTS_IN_CONST_SET =
CompileTimeErrorCode('EQUAL_ELEMENTS_IN_CONST_SET',
"Two elements in a constant set literal can't be equal.",
correction: "Change or remove the duplicate element.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a key in a constant map is the
// same as a previous key in the same map. If two keys are the same, then the
// second value would overwrite the first value, which makes having both pairs
// pointless.
//
// #### Examples
//
// The following code produces this diagnostic because the key `1` is used
// twice:
//
// ```dart
// const map = <int, String>{1: 'a', 2: 'b', [!1!]: 'c', 4: 'd'};
// ```
//
// #### Common fixes
//
// If both entries should be included in the map, then change one of the keys
// to be different:
//
// ```dart
// const map = <int, String>{1: 'a', 2: 'b', 3: 'c', 4: 'd'};
// ```
//
// If only one of the entries is needed, then remove the one that isn't
// needed:
//
// ```dart
// const map = <int, String>{1: 'a', 2: 'b', 4: 'd'};
// ```
//
// Note that literal maps preserve the order of their entries, so the choice
// of which entry to remove might affect the order in which keys and values
// are returned by an iterator.
static const CompileTimeErrorCode EQUAL_KEYS_IN_CONST_MAP =
CompileTimeErrorCode('EQUAL_KEYS_IN_CONST_MAP',
"Two keys in a constant map literal can't be equal.",
correction: "Change or remove the duplicate key.",
hasPublishedDocs: true);
/**
* 12.7 Lists: A fresh instance (7.6.1) <i>a</i>, of size <i>n</i>, whose
* class implements the built-in class <i>List&lt;E></i> is allocated.
*
* Parameters:
* 0: the number of provided type arguments
*/
static const CompileTimeErrorCode EXPECTED_ONE_LIST_TYPE_ARGUMENTS =
CompileTimeErrorCode(
'EXPECTED_ONE_LIST_TYPE_ARGUMENTS',
"List literals require exactly one type argument or none, "
"but {0} found.",
correction: "Try adjusting the number of type arguments.");
/**
* Parameters:
* 0: the number of provided type arguments
*/
static const CompileTimeErrorCode EXPECTED_ONE_SET_TYPE_ARGUMENTS =
CompileTimeErrorCode(
'EXPECTED_ONE_SET_TYPE_ARGUMENTS',
"Set literals require exactly one type argument or none, "
"but {0} found.",
correction: "Try adjusting the number of type arguments.");
/**
* 12.8 Maps: A fresh instance (7.6.1) <i>m</i>, of size <i>n</i>, whose class
* implements the built-in class <i>Map&lt;K, V></i> is allocated.
*
* Parameters:
* 0: the number of provided type arguments
*/
static const CompileTimeErrorCode EXPECTED_TWO_MAP_TYPE_ARGUMENTS =
CompileTimeErrorCode(
'EXPECTED_TWO_MAP_TYPE_ARGUMENTS',
"Map literals require exactly two type arguments or none, "
"but {0} found.",
correction: "Try adjusting the number of type arguments.");
/**
* SDK implementation libraries can be exported only by other SDK libraries.
*
* Parameters:
* 0: the uri pointing to a library
*/
static const CompileTimeErrorCode EXPORT_INTERNAL_LIBRARY =
CompileTimeErrorCode('EXPORT_INTERNAL_LIBRARY',
"The library '{0}' is internal and can't be exported.");
/**
* Parameters:
* 0: the name of a symbol defined in a legacy library
*/
// #### Description
//
// The analyzer produces this diagnostic when a library that was opted in to
// null safety exports another library, and the exported library is opted out
// of null safety.
//
// #### Example
//
// Given a library that is opted out of null safety:
//
// ```dart
// %uri="lib/optedOut.dart"
// // @dart = 2.8
// String s;
// ```
//
// The following code produces this diagnostic because it's exporting symbols
// from an opted-out library:
//
// ```dart
// %experiments=non-nullable
// export [!'optedOut.dart'!];
//
// class C {}
// ```
//
// #### Common fixes
//
// If you're able to do so, migrate the exported library so that it doesn't
// need to opt out:
//
// ```dart
// %experiments=non-nullable
// String? s;
// ```
//
// If you can't migrate the library, then remove the export:
//
// ```dart
// class C {}
// ```
//
// If the exported library (the one that is opted out) itself exports an
// opted-in library, then it's valid for your library to indirectly export the
// symbols from the opted-in library. You can do so by adding a hide
// combinator to the export directive in your library that hides all of the
// names declared in the opted-out library.
static const CompileTimeErrorCode EXPORT_LEGACY_SYMBOL = CompileTimeErrorCode(
'EXPORT_LEGACY_SYMBOL',
"The symbol '{0}' is defined in a legacy library, and can't be "
"re-exported from a library with null safety enabled.",
correction: "Try removing the export or migrating the legacy library.",
hasPublishedDocs: true);
/**
* 14.2 Exports: It is a compile-time error if the compilation unit found at
* the specified URI is not a library declaration.
*
* Parameters:
* 0: the uri pointing to a non-library declaration
*/
static const CompileTimeErrorCode EXPORT_OF_NON_LIBRARY =
CompileTimeErrorCode('EXPORT_OF_NON_LIBRARY',
"The exported library '{0}' can't have a part-of directive.",
correction: "Try exporting the library that the part is a part of.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the analyzer finds an
// expression, rather than a map entry, in what appears to be a map literal.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// var map = <String, int>{'a': 0, 'b': 1, [!'c'!]};
// ```
//
// #### Common fixes
//
// If the expression is intended to compute either a key or a value in an
// entry, fix the issue by replacing the expression with the key or the value.
// For example:
//
// ```dart
// var map = <String, int>{'a': 0, 'b': 1, 'c': 2};
// ```
static const CompileTimeErrorCode EXPRESSION_IN_MAP = CompileTimeErrorCode(
'EXPRESSION_IN_MAP', "Expressions can't be used in a map literal.",
correction: "Try removing the expression or converting it to be a map "
"entry.",
hasPublishedDocs: true);
/**
* 7.9 Superclasses: It is a compile-time error if the extends clause of a
* class <i>C</i> includes a deferred type expression.
*
* Parameters:
* 0: the name of the type that cannot be extended
*
* See [IMPLEMENTS_DEFERRED_CLASS], and [MIXIN_DEFERRED_CLASS].
*/
static const CompileTimeErrorCode EXTENDS_DEFERRED_CLASS =
CompileTimeErrorCode(
'EXTENDS_DEFERRED_CLASS', "Classes can't extend deferred classes.",
correction: "Try specifying a different superclass, or "
"removing the extends clause.");
/**
* Parameters:
* 0: The name of the disallowed type
*/
// #### Description
//
// The analyzer produces this diagnostic when one of the restricted classes is
// used in either an `extends`, `implements`, `with`, or `on` clause. The
// classes `bool`, `double`, `FutureOr`, `int`, `Null`, `num`, and `String`
// are all restricted in this way, to allow for more efficient
// implementations.
//
// #### Example
//
// The following code produces this diagnostic because `String` is used in an
// `extends` clause:
//
// ```dart
// class A extends [!String!] {}
// ```
//
// The following code produces this diagnostic because `String` is used in an
// `implements` clause:
//
// ```dart
// class B implements [!String!] {}
// ```
//
// The following code produces this diagnostic because `String` is used in a
// `with` clause:
//
// ```dart
// class C with [!String!] {}
// ```
//
// The following code produces this diagnostic because `String` is used in an
// `on` clause:
//
// ```dart
// mixin M on [!String!] {}
// ```
//
// #### Common fixes
//
// If a different type should be specified, then replace the type:
//
// ```dart
// class A extends Object {}
// ```
//
// If there isn't a different type that would be appropriate, then remove the
// type, and possibly the whole clause:
//
// ```dart
// class B {}
// ```
static const CompileTimeErrorCode EXTENDS_DISALLOWED_CLASS =
// TODO(scheglov) We might want to restore specific code with FrontEnd.
// https://github.com/dart-lang/sdk/issues/31821
CompileTimeErrorCodeWithUniqueName('SUBTYPE_OF_DISALLOWED_TYPE',
'EXTENDS_DISALLOWED_CLASS', "Classes can't extend '{0}'.",
correction: "Try specifying a different superclass, or "
"removing the extends clause.");
/**
* Parameters:
* 0: the name in the extends clause
*/
// #### Description
//
// The analyzer produces this diagnostic when an `extends` clause contains a
// name that is declared to be something other than a class.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is declared to be a
// function:
//
// ```dart
// void f() {}
//
// class C extends [!f!] {}
// ```
//
// #### Common fixes
//
// If you want the class to extend a class other than `Object`, then replace
// the name in the `extends` clause with the name of that class:
//
// ```dart
// void f() {}
//
// class C extends B {}
//
// class B {}
// ```
//
// If you want the class to extend `Object`, then remove the `extends` clause:
//
// ```dart
// void f() {}
//
// class C {}
// ```
static const CompileTimeErrorCode EXTENDS_NON_CLASS = CompileTimeErrorCode(
'EXTENDS_NON_CLASS', "Classes can only extend other classes.",
correction:
"Try specifying a different superclass, or removing the extends "
"clause.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* Parameters:
* 0: the name of the extension
*/
// #### Description
//
// The analyzer produces this diagnostic when the name of an extension is used
// in an expression other than in an extension override or to qualify an
// access to a static member of the extension. Because classes define a type,
// the name of a class can be used to refer to the instance of `Type`
// representing the type of the class. Extensions, on the other hand, don't
// define a type and can't be used as a type literal.
//
// #### Examples
//
// The following code produces this diagnostic because `E` is an extension:
//
// ```dart
// extension E on int {
// static String m() => '';
// }
//
// var x = [!E!];
// ```
//
// #### Common fixes
//
// Replace the name of the extension with a name that can be referenced, such
// as a static member defined on the extension:
//
// ```dart
// extension E on int {
// static String m() => '';
// }
//
// var x = E.m();
// ```
static const CompileTimeErrorCode EXTENSION_AS_EXPRESSION =
CompileTimeErrorCode('EXTENSION_AS_EXPRESSION',
"Extension '{0}' can't be used as an expression.",
correction: "Try replacing it with a valid expression.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the extension defining the conflicting member
* 1: the name of the conflicting static member
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension declaration
// contains both an instance member and a static member that have the same
// name. The instance member and the static member can't have the same name
// because it's unclear which member is being referenced by an unqualified use
// of the name within the body of the extension.
//
// #### Examples
//
// The following code produces this diagnostic because the name `a` is being
// used for two different members:
//
// ```dart
// extension E on Object {
// int get a => 0;
// static int [!a!]() => 0;
// }
// ```
//
// #### Common fixes
//
// Rename or remove one of the members:
//
// ```dart
// extension E on Object {
// int get a => 0;
// static int b() => 0;
// }
// ```
static const CompileTimeErrorCode EXTENSION_CONFLICTING_STATIC_AND_INSTANCE =
CompileTimeErrorCode(
'EXTENSION_CONFLICTING_STATIC_AND_INSTANCE',
"Extension '{0}' can't define static member '{1}' and an instance "
"member with the same name.",
correction:
"Try renaming the member to a name that doesn't conflict.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension declaration
// declares a member with the same name as a member declared in the class
// `Object`. Such a member can never be used because the member in `Object` is
// always found first.
//
// #### Examples
//
// The following code produces this diagnostic because `toString` is defined
// by `Object`:
//
// ```dart
// extension E on String {
// String [!toString!]() => this;
// }
// ```
//
// #### Common fixes
//
// Remove the member or rename it so that the name doesn't conflict with the
// member in `Object`:
//
// ```dart
// extension E on String {
// String displayString() => this;
// }
// ```
static const CompileTimeErrorCode EXTENSION_DECLARES_MEMBER_OF_OBJECT =
CompileTimeErrorCode(
'EXTENSION_DECLARES_MEMBER_OF_OBJECT',
"Extensions can't declare members with the same name as a member "
"declared by 'Object'.",
correction: "Try specifying a different name for the member.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is the
// receiver of the invocation of a static member. Similar to static members in
// classes, the static members of an extension should be accessed using the
// name of the extension, not an extension override.
//
// #### Examples
//
// The following code produces this diagnostic because `m` is static:
//
// ```dart
// extension E on String {
// static void m() {}
// }
//
// void f() {
// E('').[!m!]();
// }
// ```
//
// #### Common fixes
//
// Replace the extension override with the name of the extension:
//
// ```dart
// extension E on String {
// static void m() {}
// }
//
// void f() {
// E.m();
// }
// ```
static const CompileTimeErrorCode EXTENSION_OVERRIDE_ACCESS_TO_STATIC_MEMBER =
CompileTimeErrorCode(
'EXTENSION_OVERRIDE_ACCESS_TO_STATIC_MEMBER',
"An extension override can't be used to access a static member from "
"an extension.",
correction: "Try using just the name of the extension.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the argument
* 1: the extended type
*/
// #### Description
//
// The analyzer produces this diagnostic when the argument to an extension
// override isn't assignable to the type being extended by the extension.
//
// #### Examples
//
// The following code produces this diagnostic because `3` isn't a `String`:
//
// ```dart
// extension E on String {
// void method() {}
// }
//
// void f() {
// E([!3!]).method();
// }
// ```
//
// #### Common fixes
//
// If you're using the correct extension, then update the argument to have the
// correct type:
//
// ```dart
// extension E on String {
// void method() {}
// }
//
// void f() {
// E(3.toString()).method();
// }
// ```
//
// If there's a different extension that's valid for the type of the argument,
// then either replace the name of the extension or unwrap the argument so
// that the correct extension is found.
static const CompileTimeErrorCode EXTENSION_OVERRIDE_ARGUMENT_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'EXTENSION_OVERRIDE_ARGUMENT_NOT_ASSIGNABLE',
"The type of the argument to the extension override '{0}' "
"isn't assignable to the extended type '{1}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is used as
// the receiver of a cascade expression. The value of a cascade expression
// `e..m` is the value of the receiver `e`, but extension overrides aren't
// expressions and don't have a value.
//
// #### Examples
//
// The following code produces this diagnostic because `E(3)` isn't an
// expression:
//
// ```dart
// extension E on int {
// void m() {}
// }
// f() {
// [!E!](3)..m();
// }
// ```
//
// #### Common fixes
//
// Use '.' rather than '..':
//
// ```dart
// extension E on int {
// void m() {}
// }
// f() {
// E(3).m();
// }
// ```
//
// If there are multiple cascaded accesses, you'll need to duplicate the
// extension override for each one.
static const CompileTimeErrorCode EXTENSION_OVERRIDE_WITH_CASCADE =
CompileTimeErrorCode(
'EXTENSION_OVERRIDE_WITH_CASCADE',
"Extension overrides have no value so they can't be used as the "
"receiver of a cascade expression.",
correction: "Try using '.' instead of '..'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is found
// that isn't being used to access one of the members of the extension. The
// extension override syntax doesn't have any runtime semantics; it only
// controls which member is selected at compile time.
//
// #### Examples
//
// The following code produces this diagnostic because `E(i)` isn't an
// expression:
//
// ```dart
// extension E on int {
// int get a => 0;
// }
//
// void f(int i) {
// print([!E(i)!]);
// }
// ```
//
// #### Common fixes
//
// If you want to invoke one of the members of the extension, then add the
// invocation:
//
// ```dart
// extension E on int {
// int get a => 0;
// }
//
// void f(int i) {
// print(E(i).a);
// }
// ```
//
// If you don't want to invoke a member, then unwrap the argument:
//
// ```dart
// extension E on int {
// int get a => 0;
// }
//
// void f(int i) {
// print(i);
// }
// ```
static const CompileTimeErrorCode EXTENSION_OVERRIDE_WITHOUT_ACCESS =
CompileTimeErrorCode('EXTENSION_OVERRIDE_WITHOUT_ACCESS',
"An extension override can only be used to access instance members.",
correction: "Consider adding an access to an instance member.",
hasPublishedDocs: true);
static const CompileTimeErrorCode EXTERNAL_FIELD_CONSTRUCTOR_INITIALIZER =
CompileTimeErrorCode('EXTERNAL_FIELD_CONSTRUCTOR_INITIALIZER',
'External fields cannot have initializers.',
correction:
"Try removing the field initializer or the 'external' keyword "
"from the field declaration.");
static const CompileTimeErrorCode EXTERNAL_FIELD_INITIALIZER =
CompileTimeErrorCode('EXTERNAL_FIELD_INITIALIZER',
'External fields cannot have initializers.',
correction:
"Try removing the initializer or the 'external' keyword.");
static const CompileTimeErrorCode EXTERNAL_VARIABLE_INITIALIZER =
CompileTimeErrorCode('EXTERNAL_VARIABLE_INITIALIZER',
'External variables cannot have initializers.',
correction:
"Try removing the initializer or the 'external' keyword.");
/**
* Parameters:
* 0: the maximum number of positional arguments
* 1: the actual number of positional arguments given
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function invocation
// has more positional arguments than the method or function allows.
//
// #### Examples
//
// The following code produces this diagnostic because `f` defines 2
// parameters but is invoked with 3 arguments:
//
// ```dart
// void f(int a, int b) {}
// void g() {
// f[!(1, 2, 3)!];
// }
// ```
//
// #### Common fixes
//
// Remove the arguments that don't correspond to parameters:
//
// ```dart
// void f(int a, int b) {}
// void g() {
// f(1, 2);
// }
// ```
static const CompileTimeErrorCode EXTRA_POSITIONAL_ARGUMENTS =
CompileTimeErrorCode('EXTRA_POSITIONAL_ARGUMENTS',
"Too many positional arguments: {0} expected, but {1} found.",
correction: "Try removing the extra arguments.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the maximum number of positional arguments
* 1: the actual number of positional arguments given
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function invocation
// has more positional arguments than the method or function allows, but the
// method or function defines named parameters.
//
// #### Examples
//
// The following code produces this diagnostic because `f` defines 2
// positional parameters but has a named parameter that could be used for the
// third argument:
//
// ```dart
// void f(int a, int b, {int c}) {}
// void g() {
// f[!(1, 2, 3)!];
// }
// ```
//
// #### Common fixes
//
// If some of the arguments should be values for named parameters, then add
// the names before the arguments:
//
// ```dart
// void f(int a, int b, {int c}) {}
// void g() {
// f(1, 2, c: 3);
// }
// ```
//
// Otherwise, remove the arguments that don't correspond to positional
// parameters:
//
// ```dart
// void f(int a, int b, {int c}) {}
// void g() {
// f(1, 2);
// }
// ```
static const CompileTimeErrorCode EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED =
CompileTimeErrorCode('EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED',
"Too many positional arguments: {0} expected, but {1} found.",
correction: "Try removing the extra positional arguments, "
"or specifying the name for named arguments.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It
* is a compile time error if more than one initializer corresponding to a
* given instance variable appears in <i>k</i>'s list.
*
* Parameters:
* 0: the name of the field being initialized multiple times
*/
static const CompileTimeErrorCode FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS =
CompileTimeErrorCode('FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS',
"The field '{0}' can't be initialized twice in the same constructor.",
correction: "Try removing one of the initializations.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a final field is initialized in
// both the declaration of the field and in an initializer in a constructor.
// Final fields can only be assigned once, so it can't be initialized in both
// places.
//
// #### Example
//
// The following code produces this diagnostic because `f` is :
//
// ```dart
// class C {
// final int f = 0;
// C() : [!f!] = 1;
// }
// ```
//
// #### Common fixes
//
// If the initialization doesn't depend on any values passed to the
// constructor, and if all of the constructors need to initialize the field to
// the same value, then remove the initializer from the constructor:
//
// ```dart
// class C {
// final int f = 0;
// C();
// }
// ```
//
// If the initialization depends on a value passed to the constructor, or if
// different constructors need to initialize the field differently, then
// remove the initializer in the field's declaration:
//
// ```dart
// class C {
// final int f;
// C() : f = 1;
// }
// ```
static const CompileTimeErrorCode
FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION = CompileTimeErrorCode(
'FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION',
"Fields can't be initialized in the constructor if they are final "
"and were already initialized at their declaration.",
correction: "Try removing one of the initializations.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It
* is a compile time error if <i>k</i>'s initializer list contains an
* initializer for a variable that is initialized by means of an initializing
* formal of <i>k</i>.
*/
static const CompileTimeErrorCode
FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER = CompileTimeErrorCode(
'FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER',
"Fields can't be initialized in both the parameter list and the "
"initializers.",
correction: "Try removing one of the initializations.");
/**
* 7.6.1 Generative Constructors: It is a compile-time error if an
* initializing formal is used by a function other than a non-redirecting
* generative constructor.
*/
static const CompileTimeErrorCode FIELD_INITIALIZER_FACTORY_CONSTRUCTOR =
CompileTimeErrorCode(
'FIELD_INITIALIZER_FACTORY_CONSTRUCTOR',
"Initializing formal parameters can't be used in factory "
"constructors.",
correction: "Try using a normal parameter.");
/**
* Parameters:
* 0: the name of the type of the initializer expression
* 1: the name of the type of the field
*/
// #### Description
//
// The analyzer produces this diagnostic when the initializer list of a
// constructor initializes a field to a value that isn't assignable to the
// field.
//
// #### Example
//
// The following code produces this diagnostic because `0` has the type `int`,
// and an `int` can't be assigned to a field of type `String`:
//
// ```dart
// class C {
// String s;
//
// C() : s = [!0!];
// }
// ```
//
// #### Common fixes
//
// If the type of the field is correct, then change the value assigned to it
// so that the value has a valid type:
//
// ```dart
// class C {
// String s;
//
// C() : s = '0';
// }
// ```
//
// If the type of the value is correct, then change the type of the field to
// allow the assignment:
//
// ```dart
// class C {
// int s;
//
// C() : s = 0;
// }
// ```
static const CompileTimeErrorCode FIELD_INITIALIZER_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'FIELD_INITIALIZER_NOT_ASSIGNABLE',
"The initializer type '{0}' can't be assigned to the field type "
"'{1}'.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: It is a compile-time error if an
* initializing formal is used by a function other than a non-redirecting
* generative constructor.
*/
static const CompileTimeErrorCode FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR =
CompileTimeErrorCode('FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR',
"Initializing formal parameters can only be used in constructors.",
correction: "Try using a normal parameter.");
/**
* 7.6.1 Generative Constructors: A generative constructor may be redirecting,
* in which case its only action is to invoke another generative constructor.
*
* 7.6.1 Generative Constructors: It is a compile-time error if an
* initializing formal is used by a function other than a non-redirecting
* generative constructor.
*/
static const CompileTimeErrorCode FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR =
CompileTimeErrorCode('FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR',
"The redirecting constructor can't have a field initializer.",
correction: "Try using a normal parameter.");
/**
* 7.6.1 Generative Constructors: An initializing formal has the form
* <i>this.id</i>. It is a static warning if the static type of <i>id</i> is
* not assignable to <i>T<sub>id</sub></i>.
*
* Parameters:
* 0: the name of the type of the field formal parameter
* 1: the name of the type of the field
*/
static const CompileTimeErrorCode FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE =
CompileTimeErrorCode('FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE',
"The parameter type '{0}' is incompatible with the field type '{1}'.",
correction: "Try changing or removing the parameter's type, or "
"changing the field's type.");
/**
* 5. Variables: It is a static warning if a final instance variable that has
* been initialized at its point of declaration is also initialized in a
* constructor.
*
* Parameters:
* 0: the name of the field in question
*/
static const CompileTimeErrorCode
FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR = CompileTimeErrorCode(
'FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR',
"'{0}' is final and was given a value when it was declared, "
"so it can't be set to a new value.",
correction: "Try removing one of the initializations.");
/**
* 5 Variables: It is a compile-time error if a final instance variable that
* has is initialized by means of an initializing formal of a constructor is
* also initialized elsewhere in the same constructor.
*
* Parameters:
* 0: the name of the field in question
*/
static const CompileTimeErrorCode FINAL_INITIALIZED_MULTIPLE_TIMES =
CompileTimeErrorCode('FINAL_INITIALIZED_MULTIPLE_TIMES',
"'{0}' is a final field and so can only be set once.",
correction: "Try removing all but one of the initializations.");
/**
* Parameters:
* 0: the name of the uninitialized final variable
*/
// #### Description
//
// The analyzer produces this diagnostic when a final field or variable isn't
// initialized.
//
// #### Examples
//
// The following code produces this diagnostic because `x` doesn't have an
// initializer:
//
// ```dart
// final [!x!];
// ```
//
// #### Common fixes
//
// For variables and static fields, you can add an initializer:
//
// ```dart
// final x = 0;
// ```
//
// For instance fields, you can add an initializer as shown in the previous
// example, or you can initialize the field in every constructor. You can
// initialize the field by using a field formal parameter:
//
// ```dart
// class C {
// final int x;
// C(this.x);
// }
// ```
//
// You can also initialize the field by using an initializer in the
// constructor:
//
// ```dart
// class C {
// final int x;
// C(int y) : x = y * 2;
// }
// ```
static const CompileTimeErrorCode FINAL_NOT_INITIALIZED =
CompileTimeErrorCode('FINAL_NOT_INITIALIZED',
"The final variable '{0}' must be initialized.",
// TODO(brianwilkerson) Split this error code so that we can suggest
// initializing fields in constructors (FINAL_FIELD_NOT_INITIALIZED
// and FINAL_VARIABLE_NOT_INITIALIZED).
correction: "Try initializing the variable.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the uninitialized final variable
*/
// #### Description
//
// The analyzer produces this diagnostic when a class defines one or more
// final instance fields without initializers and has at least one constructor
// that doesn't initialize those fields. All final instance fields must be
// initialized when the instance is created, either by the field's initializer
// or by the constructor.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// class C {
// final String value;
//
// [!C!]();
// }
// ```
//
// #### Common fixes
//
// If the value should be passed in to the constructor directly, then use a
// field formal parameter to initialize the field `value`:
//
// ```dart
// class C {
// final String value;
//
// C(this.value);
// }
// ```
//
// If the value should be computed indirectly from a value provided by the
// caller, then add a parameter and include an initializer:
//
// ```dart
// class C {
// final String value;
//
// C(Object o) : value = o.toString();
// }
// ```
//
// If the value of the field doesn't depend on values that can be passed to
// the constructor, then add an initializer for the field as part of the field
// declaration:
//
// ```dart
// class C {
// final String value = '';
//
// C();
// }
// ```
//
// If the value of the field doesn't depend on values that can be passed to
// the constructor but different constructors need to initialize it to
// different values, then add an initializer for the field in the initializer
// list:
//
// ```dart
// class C {
// final String value;
//
// C() : value = '';
//
// C.named() : value = 'c';
// }
// ```
//
// However, if the value is the same for all instances, then consider using a
// static field instead of an instance field:
//
// ```dart
// class C {
// static const String value = '';
//
// C();
// }
// ```
static const CompileTimeErrorCode FINAL_NOT_INITIALIZED_CONSTRUCTOR_1 =
CompileTimeErrorCodeWithUniqueName(
'FINAL_NOT_INITIALIZED_CONSTRUCTOR',
'FINAL_NOT_INITIALIZED_CONSTRUCTOR_1',
"All final variables must be initialized, but '{0}' isn't.",
correction: "Try adding an initializer for the field.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the uninitialized final variable
* 1: the name of the uninitialized final variable
*/
static const CompileTimeErrorCode FINAL_NOT_INITIALIZED_CONSTRUCTOR_2 =
CompileTimeErrorCodeWithUniqueName(
'FINAL_NOT_INITIALIZED_CONSTRUCTOR',
'FINAL_NOT_INITIALIZED_CONSTRUCTOR_2',
"All final variables must be initialized, but '{0}' and '{1}' "
"aren't.",
correction: "Try adding initializers for the fields.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the uninitialized final variable
* 1: the name of the uninitialized final variable
* 2: the number of additional not initialized variables that aren't listed
*/
static const CompileTimeErrorCode FINAL_NOT_INITIALIZED_CONSTRUCTOR_3_PLUS =
CompileTimeErrorCodeWithUniqueName(
'FINAL_NOT_INITIALIZED_CONSTRUCTOR',
'FINAL_NOT_INITIALIZED_CONSTRUCTOR_3',
"All final variables must be initialized, but '{0}', '{1}', and {2} "
"others aren't.",
correction: "Try adding initializers for the fields.",
hasPublishedDocs: true);
/**
* 17.6.2 For-in. It the iterable expression does not implement Iterable with
* a type argument that can be assigned to the for-in variable's type, this
* warning is reported.
*
* Parameters:
* 0: The type of the iterable expression.
* 1: The sequence type -- Iterable for `for` or Stream for `await for`.
* 2: The loop variable type.
*/
static const CompileTimeErrorCode FOR_IN_OF_INVALID_ELEMENT_TYPE =
CompileTimeErrorCode(
'FOR_IN_OF_INVALID_ELEMENT_TYPE',
"The type '{0}' used in the 'for' loop must implement {1} with a "
"type argument that can be assigned to '{2}'.");
/**
* Parameters:
* 0: The type of the iterable expression.
* 1: The sequence type -- Iterable for `for` or Stream for `await for`.
*/
// #### Description
//
// The analyzer produces this diagnostic when the expression following `in` in
// a for-in loop has a type that isn't a subclass of `Iterable`.
//
// #### Examples
//
// The following code produces this diagnostic because `m` is a `Map`, and
// `Map` isn't a subclass of `Iterable`:
//
// ```dart
// void f(Map<String, String> m) {
// for (String s in [!m!]) {
// print(s);
// }
// }
// ```
//
// #### Common fixes
//
// Replace the expression with one that produces an iterable value:
//
// ```dart
// void f(Map<String, String> m) {
// for (String s in m.values) {
// print(s);
// }
// }
// ```
static const CompileTimeErrorCode FOR_IN_OF_INVALID_TYPE =
CompileTimeErrorCode('FOR_IN_OF_INVALID_TYPE',
"The type '{0}' used in the 'for' loop must implement {1}.",
hasPublishedDocs: true);
static const CompileTimeErrorCode FOR_IN_WITH_CONST_VARIABLE =
CompileTimeErrorCode('FOR_IN_WITH_CONST_VARIABLE',
"A for-in loop-variable can't be 'const'.",
correction: "Try removing the 'const' modifier from the variable, or "
"use a different variable.");
/**
* It is a compile-time error if a generic function type is used as a bound
* for a formal type parameter of a class or a function.
*/
static const CompileTimeErrorCode GENERIC_FUNCTION_TYPE_CANNOT_BE_BOUND =
CompileTimeErrorCode('GENERIC_FUNCTION_TYPE_CANNOT_BE_BOUND',
"Generic function types can't be used as type parameter bounds",
correction: "Try making the free variable in the function type part "
"of the larger declaration signature");
/**
* It is a compile-time error if a generic function type is used as an actual
* type argument.
*/
static const CompileTimeErrorCode
GENERIC_FUNCTION_TYPE_CANNOT_BE_TYPE_ARGUMENT = CompileTimeErrorCode(
'GENERIC_FUNCTION_TYPE_CANNOT_BE_TYPE_ARGUMENT',
"A generic function type can't be a type argument.",
correction: "Try removing type parameters from the generic function "
"type, or using 'dynamic' as the type argument here.");
/**
* 10.3 Setters: It is a compile-time error if a class has a setter named
* `v=` with argument type `T` and a getter named `v` with return type `S`,
* and `S` may not be assigned to `T`.
*
* Parameters:
* 0: the name of the getter
* 1: the type of the getter
* 2: the type of the setter
* 3: the name of the setter
*/
static const CompileTimeErrorCode GETTER_NOT_ASSIGNABLE_SETTER_TYPES =
CompileTimeErrorCode(
'GETTER_NOT_ASSIGNABLE_SETTER_TYPES',
"The return type of getter '{0}' is '{1}' which isn't assignable "
"to the type '{2}' of its setter '{3}'.",
correction: "Try changing the types so that they are compatible.");
/**
* Parameters:
* 0: the name of the getter
* 1: the type of the getter
* 2: the type of the setter
* 3: the name of the setter
*/
// #### Description
//
// The analyzer produces this diagnostic when the return type of a getter
// isn't a subtype of the type of the parameter of a setter with the same
// name.
//
// The subtype relationship is a requirement whether the getter and setter are
// in the same class or whether one of them is in a superclass of the other.
//
// #### Example
//
// The following code produces this diagnostic because the return type of the
// getter `x` is `num`, the parameter type of the setter `x` is `int`, and
// `num` isn't a subtype of `int`:
//
// ```dart
// %experiments=non-nullable
// class C {
// num get [!x!] => 0;
//
// set x(int y) {}
// }
// ```
//
// #### Common fixes
//
// If the type of the getter is correct, then change the type of the setter:
//
// ```dart
// %experiments=non-nullable
// class C {
// num get x => 0;
//
// set x(num y) {}
// }
// ```
//
// If the type of the setter is correct, then change the type of the getter:
//
// ```dart
// %experiments=non-nullable
// class C {
// int get x => 0;
//
// set x(int y) {}
// }
// ```
static const CompileTimeErrorCode GETTER_NOT_SUBTYPE_SETTER_TYPES =
CompileTimeErrorCode(
'GETTER_NOT_SUBTYPE_SETTER_TYPES',
"The return type of getter '{0}' is '{1}' which isn't a subtype "
"of the type '{2}' of its setter '{3}'.",
correction: "Try changing the types so that they are compatible.");
static const CompileTimeErrorCode IF_ELEMENT_CONDITION_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'IF_ELEMENT_CONDITION_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as values in "
"an if condition inside a const collection literal.",
correction: "Try making the deferred import non-deferred.");
/**
* It is a compile-time error if the declared return type of a function marked
* 'async*' is not a supertype of 'Stream<T>' for some type 'T'.
*/
static const CompileTimeErrorCode ILLEGAL_ASYNC_GENERATOR_RETURN_TYPE =
CompileTimeErrorCode(
'ILLEGAL_ASYNC_GENERATOR_RETURN_TYPE',
"Functions marked 'async*' must have a return type that is a "
"supertype of 'Stream<T>' for some type 'T'.",
correction: "Try fixing the return type of the function, or "
"removing the modifier 'async*' from the function body.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the body of a function has the
// `async` modifier even though the return type of the function isn't
// assignable to `Future`.
//
// #### Example
//
// The following code produces this diagnostic because the body of the
// function `f` has the `async` modifier even though the return type isn't
// assignable to `Future`:
//
// ```dart
// [!int!] f() async {
// return 0;
// }
// ```
//
// #### Common fixes
//
// If the function should be asynchronous, then change the return type to be
// assignable to `Future`:
//
// ```dart
// Future<int> f() async {
// return 0;
// }
// ```
//
// If the function should be synchronous, then remove the `async` modifier:
//
// ```dart
// int f() {
// return 0;
// }
// ```
static const CompileTimeErrorCode ILLEGAL_ASYNC_RETURN_TYPE =
CompileTimeErrorCode(
'ILLEGAL_ASYNC_RETURN_TYPE',
"Functions marked 'async' must have a return type assignable to "
"'Future'.",
correction: "Try fixing the return type of the function, or "
"removing the modifier 'async' from the function body.",
hasPublishedDocs: true);
/**
* It is a compile-time error if the declared return type of a function marked
* 'sync*' is not a supertype of 'Iterable<T>' for some type 'T'.
*/
static const CompileTimeErrorCode ILLEGAL_SYNC_GENERATOR_RETURN_TYPE =
CompileTimeErrorCode(
'ILLEGAL_SYNC_GENERATOR_RETURN_TYPE',
"Functions marked 'sync*' must have a return type that is a "
"supertype of 'Iterable<T>' for some type 'T'.",
correction: "Try fixing the return type of the function, or "
"removing the modifier 'sync*' from the function body.");
/**
* 7.10 Superinterfaces: It is a compile-time error if the implements clause
* of a class <i>C</i> specifies a malformed type or deferred type as a
* superinterface.
*
* See [EXTENDS_DEFERRED_CLASS], and [MIXIN_DEFERRED_CLASS].
*/
static const CompileTimeErrorCode IMPLEMENTS_DEFERRED_CLASS =
CompileTimeErrorCode('IMPLEMENTS_DEFERRED_CLASS',
"Classes and mixins can't implement deferred classes.",
correction: "Try specifying a different interface, "
"removing the class from the list, or "
"changing the import to not be deferred.");
/**
* Parameters:
* 0: The name of the disallowed type
*/
static const CompileTimeErrorCode IMPLEMENTS_DISALLOWED_CLASS =
CompileTimeErrorCodeWithUniqueName(
'SUBTYPE_OF_DISALLOWED_TYPE',
'IMPLEMENTS_DISALLOWED_CLASS',
"Classes and mixins can't implement '{0}'.",
correction: "Try specifying a different interface, or "
"remove the class from the list.");
/**
* Parameters:
* 0: the name of the interface that was not found
*/
// #### Description
//
// The analyzer produces this diagnostic when a name used in the `implements`
// clause of a class or mixin declaration is defined to be something other
// than a class or mixin.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is a variable
// rather than a class or mixin:
//
// ```dart
// var x;
// class C implements [!x!] {}
// ```
//
// #### Common fixes
//
// If the name is the name of an existing class or mixin that's already being
// imported, then add a prefix to the import so that the local definition of
// the name doesn't shadow the imported name.
//
// If the name is the name of an existing class or mixin that isn't being
// imported, then add an import, with a prefix, for the library in which it’s
// declared.
//
// Otherwise, either replace the name in the `implements` clause with the name
// of an existing class or mixin, or remove the name from the `implements`
// clause.
static const CompileTimeErrorCode IMPLEMENTS_NON_CLASS = CompileTimeErrorCode(
'IMPLEMENTS_NON_CLASS',
"Classes and mixins can only implement other classes and mixins.",
correction:
"Try specifying a class or mixin, or remove the name from the "
"list.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the interface that is implemented more than once
*/
// #### Description
//
// The analyzer produces this diagnostic when a single class is specified more
// than once in an `implements` clause.
//
// #### Examples
//
// The following code produces this diagnostic because `A` is in the list
// twice:
//
// ```dart
// class A {}
// class B implements A, [!A!] {}
// ```
//
// #### Common fixes
//
// Remove all except one occurrence of the class name:
//
// ```dart
// class A {}
// class B implements A {}
// ```
static const CompileTimeErrorCode IMPLEMENTS_REPEATED = CompileTimeErrorCode(
'IMPLEMENTS_REPEATED', "'{0}' can only be implemented once.",
correction: "Try removing all but one occurrence of the class name.",
hasPublishedDocs: true);
/**
* 7.10 Superinterfaces: It is a compile-time error if the superclass of a
* class <i>C</i> appears in the implements clause of <i>C</i>.
*
* Parameters:
* 0: the name of the class that appears in both "extends" and "implements"
* clauses
*/
static const CompileTimeErrorCode IMPLEMENTS_SUPER_CLASS =
CompileTimeErrorCode('IMPLEMENTS_SUPER_CLASS',
"'{0}' can't be used in both 'extends' and 'implements' clauses.",
correction: "Try removing one of the occurrences.");
/**
* Parameters:
* 0: the name of the instance member
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds a reference to an
// instance member in a constructor's initializer list.
//
// #### Examples
//
// The following code produces this diagnostic because `defaultX` is an
// instance member:
//
// ```dart
// class C {
// int x;
//
// C() : x = [!defaultX!];
//
// int get defaultX => 0;
// }
// ```
//
// #### Common fixes
//
// If the member can be made static, then do so:
//
// ```dart
// class C {
// int x;
//
// C() : x = defaultX;
//
// static int get defaultX => 0;
// }
// ```
//
// If not, then replace the reference in the initializer with a different
// expression that doesn't use an instance member:
//
// ```dart
// class C {
// int x;
//
// C() : x = 0;
//
// int get defaultX => 0;
// }
// ```
static const CompileTimeErrorCode IMPLICIT_THIS_REFERENCE_IN_INITIALIZER =
CompileTimeErrorCode('IMPLICIT_THIS_REFERENCE_IN_INITIALIZER',
"The instance member '{0}' can't be accessed in an initializer.",
correction:
'Try replacing the reference to the instance member with a '
'different expression',
hasPublishedDocs: true);
/**
* Parameters:
* 0: the uri pointing to a library
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds an import whose `dart:`
// URI references an internal library.
//
// #### Example
//
// The following code produces this diagnostic because `_interceptors` is an
// internal library:
//
// ```dart
// import [!'dart:_interceptors'!];
// ```
//
// #### Common fixes
//
// Remove the import directive.
static const CompileTimeErrorCode IMPORT_INTERNAL_LIBRARY =
CompileTimeErrorCode('IMPORT_INTERNAL_LIBRARY',
"The library '{0}' is internal and can't be imported.",
hasPublishedDocs: true);
/**
* 14.1 Imports: It is a compile-time error if the specified URI of an
* immediate import does not refer to a library declaration.
*
* Parameters:
* 0: the uri pointing to a non-library declaration
*/
static const CompileTimeErrorCode IMPORT_OF_NON_LIBRARY =
CompileTimeErrorCode('IMPORT_OF_NON_LIBRARY',
"The imported library '{0}' can't have a part-of directive.",
correction: "Try importing the library that the part is a part of.");
/**
* 13.9 Switch: It is a compile-time error if values of the expressions
* <i>e<sub>k</sub></i> are not instances of the same class <i>C</i>, for all
* <i>1 &lt;= k &lt;= n</i>.
*
* Parameters:
* 0: the expression source code that is the unexpected type
* 1: the name of the expected type
*/
static const CompileTimeErrorCode INCONSISTENT_CASE_EXPRESSION_TYPES =
CompileTimeErrorCode('INCONSISTENT_CASE_EXPRESSION_TYPES',
"Case expressions must have the same types, '{0}' isn't a '{1}'.");
/**
* Parameters:
* 0: the name of the instance member with inconsistent inheritance.
* 1: the list of all inherited signatures for this member.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class inherits two or more
// conflicting signatures for a member and doesn't provide an implementation
// that satisfies all the inherited signatures.
//
// #### Example
//
// The following code produces this diagnostic because `C` is inheriting the
// declaration of `m` from `A`, and that implementation isn't consistent with
// the signature of `m` that's inherited from `B`:
//
// ```dart
// class A {
// void m({int a}) {}
// }
//
// class B {
// void m({int b}) {}
// }
//
// class [!C!] extends A implements B {
// }
// ```
//
// #### Common fixes
//
// Add an implementation of the method that satisfies all the inherited
// signatures:
//
// ```dart
// class A {
// void m({int a}) {}
// }
//
// class B {
// void m({int b}) {}
// }
//
// class C extends A implements B {
// void m({int a, int b}) {}
// }
// ```
static const CompileTimeErrorCode INCONSISTENT_INHERITANCE =
CompileTimeErrorCode('INCONSISTENT_INHERITANCE',
"Superinterfaces don't have a valid override for '{0}': {1}.",
correction:
"Try adding an explicit override that is consistent with all "
"of the inherited members.",
hasPublishedDocs: true);
/**
* 11.1.1 Inheritance and Overriding. Let `I` be the implicit interface of a
* class `C` declared in library `L`. `I` inherits all members of
* `inherited(I, L)` and `I` overrides `m'` if `m' ∈ overrides(I, L)`. It is
* a compile-time error if `m` is a method and `m'` is a getter, or if `m`
* is a getter and `m'` is a method.
*
* Parameters:
* 0: the name of the the instance member with inconsistent inheritance.
* 1: the name of the superinterface that declares the name as a getter.
* 2: the name of the superinterface that declares the name as a method.
*/
static const CompileTimeErrorCode INCONSISTENT_INHERITANCE_GETTER_AND_METHOD =
CompileTimeErrorCode(
'INCONSISTENT_INHERITANCE_GETTER_AND_METHOD',
"'{0}' is inherited as a getter (from '{1}') and also a "
"method (from '{2}').",
correction:
"Try adjusting the supertypes of this class to remove the "
"inconsistency.");
/**
* It is a compile-time error if a part file has a different language version
* override than its library.
*
* https://github.com/dart-lang/language/blob/master/accepted/
* future-releases/language-versioning/feature-specification.md
* #individual-library-language-version-override
*/
static const CompileTimeErrorCode INCONSISTENT_LANGUAGE_VERSION_OVERRIDE =
CompileTimeErrorCode(
'INCONSISTENT_LANGUAGE_VERSION_OVERRIDE',
"Parts must have exactly the same language version override as "
"the library.");
/**
* Parameters:
* 0: the name of the initializing formal that is not an instance variable in
* the immediately enclosing class
*/
// #### Description
//
// The analyzer produces this diagnostic when a constructor initializes a
// field that isn't declared in the class containing the constructor.
// Constructors can't initialize fields that aren't declared and fields that
// are inherited from superclasses.
//
// #### Examples
//
// The following code produces this diagnostic because the initializer is
// initializing `x`, but `x` isn't a field in the class:
//
// ```dart
// class C {
// int y;
//
// C() : [!x = 0!];
// }
// ```
//
// #### Common fixes
//
// If a different field should be initialized, then change the name to the
// name of the field:
//
// ```dart
// class C {
// int y;
//
// C() : y = 0;
// }
// ```
//
// If the field must be declared, then add a declaration:
//
// ```dart
// class C {
// int x;
// int y;
//
// C() : x = 0;
// }
// ```
static const CompileTimeErrorCode INITIALIZER_FOR_NON_EXISTENT_FIELD =
CompileTimeErrorCode('INITIALIZER_FOR_NON_EXISTENT_FIELD',
"'{0}' isn't a field in the enclosing class.",
correction: "Try correcting the name to match an existing field, or "
"defining a field named '{0}'.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It
* is a compile-time error if <i>k</i>'s initializer list contains an
* initializer for a variable that is not an instance variable declared in the
* immediately surrounding class.
*
* Parameters:
* 0: the name of the initializing formal that is a static variable in the
* immediately enclosing class
*
* See [INITIALIZING_FORMAL_FOR_STATIC_FIELD].
*/
static const CompileTimeErrorCode INITIALIZER_FOR_STATIC_FIELD =
CompileTimeErrorCode(
'INITIALIZER_FOR_STATIC_FIELD',
"'{0}' is a static field in the enclosing class. Fields initialized "
"in a constructor can't be static.",
correction: "Try removing the initialization.");
/**
* Parameters:
* 0: the name of the initializing formal that is not an instance variable in
* the immediately enclosing class
*/
// #### Description
//
// The analyzer produces this diagnostic when a field formal parameter is
// found in a constructor in a class that doesn't declare the field being
// initialized. Constructors can't initialize fields that aren't declared and
// fields that are inherited from superclasses.
//
// #### Examples
//
// The following code produces this diagnostic because the field `x` isn't
// defined:
//
// ```dart
// class C {
// int y;
//
// C([!this.x!]);
// }
// ```
//
// #### Common fixes
//
// If the field name was wrong, then change it to the name of an existing
// field:
//
// ```dart
// class C {
// int y;
//
// C(this.y);
// }
// ```
//
// If the field name is correct but hasn't yet been defined, then declare the
// field:
//
// ```dart
// class C {
// int x;
// int y;
//
// C(this.x);
// }
// ```
//
// If the parameter is needed but shouldn't initialize a field, then convert
// it to a normal parameter and use it:
//
// ```dart
// class C {
// int y;
//
// C(int x) : y = x * 2;
// }
// ```
//
// If the parameter isn't needed, then remove it:
//
// ```dart
// class C {
// int y;
//
// C();
// }
// ```
static const CompileTimeErrorCode INITIALIZING_FORMAL_FOR_NON_EXISTENT_FIELD =
CompileTimeErrorCode('INITIALIZING_FORMAL_FOR_NON_EXISTENT_FIELD',
"'{0}' isn't a field in the enclosing class.",
correction: "Try correcting the name to match an existing field, or "
"defining a field named '{0}'.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: An initializing formal has the form
* <i>this.id</i>. It is a compile-time error if <i>id</i> is not the name of
* an instance variable of the immediately enclosing class.
*
* Parameters:
* 0: the name of the initializing formal that is a static variable in the
* immediately enclosing class
*
* See [INITIALIZER_FOR_STATIC_FIELD].
*/
static const CompileTimeErrorCode INITIALIZING_FORMAL_FOR_STATIC_FIELD =
CompileTimeErrorCode(
'INITIALIZING_FORMAL_FOR_STATIC_FIELD',
"'{0}' is a static field in the enclosing class. Fields initialized "
"in a constructor can't be static.",
correction: "Try removing the initialization.");
/**
* Parameters:
* 0: the name of the static member
* 1: the kind of the static member (field, getter, setter, or method)
* 2: the name of the defining class
*/
// #### Description
//
// The analyzer produces this diagnostic when an access operator is used to
// access a static member through an instance of the class.
//
// #### Examples
//
// The following code produces this diagnostic because `zero` is a static
// field, but it’s being accessed as if it were an instance field:
//
// ```dart
// void f(C c) {
// c.[!zero!];
// }
//
// class C {
// static int zero = 0;
// }
// ```
//
// #### Common fixes
//
// Use the class to access the static member:
//
// ```dart
// void f(C c) {
// C.zero;
// }
//
// class C {
// static int zero = 0;
// }
// ```
static const CompileTimeErrorCode INSTANCE_ACCESS_TO_STATIC_MEMBER =
CompileTimeErrorCode('INSTANCE_ACCESS_TO_STATIC_MEMBER',
"Static {1} '{0}' can't be accessed through an instance.",
correction: "Try using the class '{2}' to access the {1}.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a factory constructor contains
// an unqualified reference to an instance member. In a generative
// constructor, the instance of the class is created and initialized before
// the body of the constructor is executed, so the instance can be bound to
// `this` and accessed just like it would be in an instance method. But, in a
// factory constructor, the instance isn't created before executing the body,
// so `this` can't be used to reference it.
//
// #### Examples
//
// The following code produces this diagnostic because `x` isn't in scope in
// the factory constructor:
//
// ```dart
// class C {
// int x;
// factory C() {
// return C._([!x!]);
// }
// C._(this.x);
// }
// ```
//
// #### Common fixes
//
// Rewrite the code so that it doesn't reference the instance member:
//
// ```dart
// class C {
// int x;
// factory C() {
// return C._(0);
// }
// C._(this.x);
// }
// ```
static const CompileTimeErrorCode INSTANCE_MEMBER_ACCESS_FROM_FACTORY =
CompileTimeErrorCode('INSTANCE_MEMBER_ACCESS_FROM_FACTORY',
"Instance members can't be accessed from a factory constructor.",
correction: "Try removing the reference to the instance member.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a static method contains an
// unqualified reference to an instance member.
//
// #### Examples
//
// The following code produces this diagnostic because the instance field `x`
// is being referenced in a static method:
//
// ```dart
// class C {
// int x;
//
// static int m() {
// return [!x!];
// }
// }
// ```
//
// #### Common fixes
//
// If the method must reference the instance member, then it can't be static,
// so remove the keyword:
//
// ```dart
// class C {
// int x;
//
// int m() {
// return x;
// }
// }
// ```
//
// If the method can't be made an instance method, then add a parameter so
// that an instance of the class can be passed in:
//
// ```dart
// class C {
// int x;
//
// static int m(C c) {
// return c.x;
// }
// }
// ```
static const CompileTimeErrorCode INSTANCE_MEMBER_ACCESS_FROM_STATIC =
CompileTimeErrorCode('INSTANCE_MEMBER_ACCESS_FROM_STATIC',
"Instance members can't be accessed from a static method.",
correction: "Try removing the reference to the instance member, or "
"removing the keyword 'static' from the method.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds a constructor
// invocation and the constructor is declared in an abstract class. Even
// though you can't create an instance of an abstract class, abstract classes
// can declare constructors that can be invoked by subclasses.
//
// #### Examples
//
// The following code produces this diagnostic because `C` is an abstract
// class:
//
// ```dart
// abstract class C {}
//
// var c = new [!C!]();
// ```
//
// #### Common fixes
//
// If there's a concrete subclass of the abstract class that can be used, then
// create an instance of the concrete subclass.
static const CompileTimeErrorCode INSTANTIATE_ABSTRACT_CLASS =
CompileTimeErrorCode('INSTANTIATE_ABSTRACT_CLASS',
"Abstract classes can't be instantiated.",
correction: "Try creating an instance of a concrete subtype.",
hasPublishedDocs: true);
/**
* Enum proposal: It is also a compile-time error to explicitly instantiate an
* enum via 'new' or 'const' or to access its private fields.
*/
static const CompileTimeErrorCode INSTANTIATE_ENUM = CompileTimeErrorCode(
'INSTANTIATE_ENUM', "Enums can't be instantiated.",
correction: "Try using one of the defined constants.");
/**
* An integer literal with static type `double` and numeric value `i`
* evaluates to an instance of the `double` class representing the value `i`.
* It is a compile-time error if the value `i` cannot be represented
* _precisely_ by the an instace of `double`.
*/
static const CompileTimeErrorCode INTEGER_LITERAL_IMPRECISE_AS_DOUBLE =
CompileTimeErrorCode(
'INTEGER_LITERAL_IMPRECISE_AS_DOUBLE',
"The integer literal is being used as a double, but can't be "
"represented as a 64 bit double without overflow and/or loss of "
"precision: {0}",
correction:
"Try using the BigInt class, or switch to the closest valid "
"double: {1}");
static const CompileTimeErrorCode INTEGER_LITERAL_OUT_OF_RANGE =
CompileTimeErrorCode('INTEGER_LITERAL_OUT_OF_RANGE',
"The integer literal {0} can't be represented in 64 bits.",
correction:
"Try using the BigInt class if you need an integer larger than "
"9,223,372,036,854,775,807 or less than "
"-9,223,372,036,854,775,808.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an annotation is found that is
// using something that is neither a variable marked as `const` or the
// invocation of a `const` constructor.
//
// Getters can't be used as annotations.
//
// #### Example
//
// The following code produces this diagnostic because the variable `v` isn't
// a `const` variable:
//
// ```dart
// var v = 0;
//
// [!@v!]
// void f() {
// }
// ```
//
// The following code produces this diagnostic because `f` isn't a variable:
//
// ```dart
// [!@f!]
// void f() {
// }
// ```
//
// The following code produces this diagnostic because `f` isn't a
// constructor:
//
// ```dart
// [!@f()!]
// void f() {
// }
// ```
//
// The following code produces this diagnostic because `g` is a getter:
//
// ```dart
// [!@g!]
// int get g => 0;
// ```
//
// #### Common fixes
//
// If the annotation is referencing a variable that isn't a `const`
// constructor, add the keyword `const` to the variable's declaration:
//
// ```dart
// const v = 0;
//
// @v
// void f() {
// }
// ```
//
// If the annotation isn't referencing a variable, then remove it:
//
// ```dart
// int v = 0;
//
// void f() {
// }
// ```
static const CompileTimeErrorCode INVALID_ANNOTATION = CompileTimeErrorCode(
'INVALID_ANNOTATION',
"Annotation must be either a const variable reference or const "
"constructor invocation.");
/**
* 15 Metadata: Metadata consists of a series of annotations, each of which
* begin with the character @, followed by a constant expression that must be
* either a reference to a compile-time constant variable, or a call to a
* constant constructor.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode INVALID_ANNOTATION_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'INVALID_ANNOTATION_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as "
"annotations.",
correction: "Try removing the annotation, or "
"changing the import to not be deferred.");
/**
* No parameters.
*/
static const CompileTimeErrorCode INVALID_ANNOTATION_GETTER =
CompileTimeErrorCodeWithUniqueName('INVALID_ANNOTATION',
'INVALID_ANNOTATION_GETTER', "Getters can't be used as annotations.",
correction: "Try using a top-level variable or a field.");
/**
* Parameters:
* 0: the name of the right hand side type
* 1: the name of the left hand side type
*/
// #### Description
//
// The analyzer produces this diagnostic when the static type of an expression
// that is assigned to a variable isn't assignable to the type of the
// variable.
//
// #### Examples
//
// The following code produces this diagnostic because the type of the
// initializer (`int`) isn't assignable to the type of the variable
// (`String`):
//
// ```dart
// int i = 0;
// String s = [!i!];
// ```
//
// #### Common fixes
//
// If the value being assigned is always assignable at runtime, even though
// the static types don't reflect that, then add an explicit cast.
//
// Otherwise, change the value being assigned so that it has the expected
// type. In the previous example, this might look like:
//
// ```dart
// int i = 0;
// String s = i.toString();
// ```
//
// If you can’t change the value, then change the type of the variable to be
// compatible with the type of the value being assigned:
//
// ```dart
// int i = 0;
// int s = i;
// ```
static const CompileTimeErrorCode INVALID_ASSIGNMENT = CompileTimeErrorCode(
'INVALID_ASSIGNMENT',
"A value of type '{0}' can't be assigned to a variable of type "
"'{1}'.",
correction: "Try changing the type of the variable, or "
"casting the right-hand type to '{1}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the function
* 1: the expected function type
*/
static const CompileTimeErrorCode INVALID_CAST_FUNCTION = CompileTimeErrorCode(
'INVALID_CAST_FUNCTION',
"The function '{0}' has type '{1}' that isn't of expected type "
"'{2}'. This means its parameter or return type doesn't match what "
"is expected.");
/**
* Parameters:
* 0: the type of the torn-off function expression
* 1: the expected function type
*/
static const CompileTimeErrorCode INVALID_CAST_FUNCTION_EXPR =
CompileTimeErrorCode(
'INVALID_CAST_FUNCTION_EXPR',
"The function expression type '{0}' isn't of type '{1}'. "
"This means its parameter or return type doesn't match what is "
"expected. Consider changing parameter type(s) or the returned "
"type(s).");
/**
* Parameters:
* 0: the type of the literal
* 1: the expected type
*/
static const CompileTimeErrorCode INVALID_CAST_LITERAL = CompileTimeErrorCode(
'INVALID_CAST_LITERAL',
"The literal '{0}' with type '{1}' isn't of expected type '{2}'.");
/**
* Parameters:
* 0: the type of the list literal
* 1: the expected type
*/
static const CompileTimeErrorCode INVALID_CAST_LITERAL_LIST =
CompileTimeErrorCode(
'INVALID_CAST_LITERAL_LIST',
"The list literal type '{0}' isn't of expected type '{1}'. The "
"list's type can be changed with an explicit generic type "
"argument or by changing the element types.");
/**
* Parameters:
* 0: the type of the map literal
* 1: the expected type
*/
static const CompileTimeErrorCode INVALID_CAST_LITERAL_MAP =
CompileTimeErrorCode(
'INVALID_CAST_LITERAL_MAP',
"The map literal type '{0}' isn't of expected type '{1}'. The maps's "
"type can be changed with an explicit generic type arguments or "
"by changing the key and value types.");
/**
* Parameters:
* 0: the type of the set literal
* 1: the expected type
*/
static const CompileTimeErrorCode INVALID_CAST_LITERAL_SET =
CompileTimeErrorCode(
'INVALID_CAST_LITERAL_SET',
"The set literal type '{0}' isn't of expected type '{1}'. The set's "
"type can be changed with an explicit generic type argument or "
"by changing the element types.");
/**
* Parameters:
* 0: the type of the torn-off method
* 1: the expected function type
*/
static const CompileTimeErrorCode INVALID_CAST_METHOD = CompileTimeErrorCode(
'INVALID_CAST_METHOD',
"The method tear-off '{0}' has type '{1}' that isn't of expected type "
"'{2}'. This means its parameter or return type doesn't match what "
"is expected.");
/**
* Parameters:
* 0: the type of the instantiated object
* 1: the expected type
*/
static const CompileTimeErrorCode INVALID_CAST_NEW_EXPR = CompileTimeErrorCode(
'INVALID_CAST_NEW_EXPR',
"The constructor returns type '{0}' that isn't of expected type '{1}'.");
/**
* TODO(brianwilkerson) Remove this when we have decided on how to report
* errors in compile-time constants. Until then, this acts as a placeholder
* for more informative errors.
*
* See TODOs in ConstantVisitor
*/
static const CompileTimeErrorCode INVALID_CONSTANT =
CompileTimeErrorCode('INVALID_CONSTANT', "Invalid constant value.");
/**
* 7.6 Constructors: It is a compile-time error if the name of a constructor
* is not a constructor name.
*/
static const CompileTimeErrorCode INVALID_CONSTRUCTOR_NAME =
CompileTimeErrorCode(
'INVALID_CONSTRUCTOR_NAME', "Invalid constructor name.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override doesn't
// have exactly one argument. The argument is the expression used to compute
// the value of `this` within the extension method, so there must be one
// argument.
//
// #### Examples
//
// The following code produces this diagnostic because there are no arguments:
//
// ```dart
// extension E on String {
// String join(String other) => '$this $other';
// }
//
// void f() {
// E[!()!].join('b');
// }
// ```
//
// And, the following code produces this diagnostic because there's more than
// one argument:
//
// ```dart
// extension E on String {
// String join(String other) => '$this $other';
// }
//
// void f() {
// E[!('a', 'b')!].join('c');
// }
// ```
//
// #### Common fixes
//
// Provide one argument for the extension override:
//
// ```dart
// extension E on String {
// String join(String other) => '$this $other';
// }
//
// void f() {
// E('a').join('b');
// }
// ```
static const CompileTimeErrorCode INVALID_EXTENSION_ARGUMENT_COUNT =
CompileTimeErrorCode(
'INVALID_EXTENSION_ARGUMENT_COUNT',
"Extension overrides must have exactly one argument: "
"the value of 'this' in the extension method.",
correction: "Try specifying exactly one argument.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the name of a factory
// constructor isn't the same as the name of the surrounding class.
//
// #### Examples
//
// The following code produces this diagnostic because the name of the factory
// constructor (`A`) isn't the same as the surrounding class (`C`):
//
// ```dart
// class A {}
//
// class C {
// factory [!A!]() => throw 0;
// }
// ```
//
// #### Common fixes
//
// If the factory returns an instance of the surrounding class, then rename
// the factory:
//
// ```dart
// class A {}
//
// class C {
// factory C() => throw 0;
// }
// ```
//
// If the factory returns an instance of a different class, then move the
// factory to that class:
//
// ```dart
// class A {
// factory A() => throw 0;
// }
//
// class C {}
// ```
//
// If the factory returns an instance of a different class, but you can't
// modify that class or don't want to move the factory, then convert it to be
// a static method:
//
// ```dart
// class A {}
//
// class C {
// static A a() => throw 0;
// }
// ```
static const CompileTimeErrorCode INVALID_FACTORY_NAME_NOT_A_CLASS =
CompileTimeErrorCode(
'INVALID_FACTORY_NAME_NOT_A_CLASS',
"The name of a factory constructor must be the same as the name of "
"the immediately enclosing class.",
hasPublishedDocs: true);
static const CompileTimeErrorCode INVALID_INLINE_FUNCTION_TYPE =
CompileTimeErrorCode(
'INVALID_INLINE_FUNCTION_TYPE',
"Inline function types can't be used for parameters in a generic "
"function type.",
correction: "Try using a generic function type "
"(returnType 'Function(' parameters ')').");
/**
* 9. Functions: It is a compile-time error if an async, async* or sync*
* modifier is attached to the body of a setter or constructor.
*/
static const CompileTimeErrorCode INVALID_MODIFIER_ON_CONSTRUCTOR =
CompileTimeErrorCode('INVALID_MODIFIER_ON_CONSTRUCTOR',
"The modifier '{0}' can't be applied to the body of a constructor.",
correction: "Try removing the modifier.");
/**
* 9. Functions: It is a compile-time error if an async, async* or sync*
* modifier is attached to the body of a setter or constructor.
*/
static const CompileTimeErrorCode INVALID_MODIFIER_ON_SETTER =
CompileTimeErrorCode('INVALID_MODIFIER_ON_SETTER',
"The modifier '{0}' can't be applied to the body of a setter.",
correction: "Try removing the modifier.");
/**
* Parameters:
* 0: the name of the declared member that is not a valid override.
* 1: the name of the interface that declares the member.
* 2: the type of the declared member in the interface.
* 3. the name of the interface with the overridden member.
* 4. the type of the overridden member.
*/
// #### Description
//
// The analyzer produces this diagnostic when a member of a class is found
// that overrides a member from a supertype and the override isn't valid. An
// override is valid if all of these are true:
// * It allows all of the arguments allowed by the overridden member.
// * It doesn't require any arguments that aren't required by the overridden
// member.
// * The type of every parameter of the overridden member is assignable to the
// corresponding parameter of the override.
// * The return type of the override is assignable to the return type of the
// overridden member.
//
// #### Examples
//
// The following code produces this diagnostic because the type of the
// parameter `s` (`String`) isn't assignable to the type of the parameter `i`
// (`int`):
//
// ```dart
// class A {
// void m(int i) {}
// }
//
// class B extends A {
// void [!m!](String s) {}
// }
// ```
//
// #### Common fixes
//
// If the invalid method is intended to override the method from the
// superclass, then change it to conform:
//
// ```dart
// class A {
// void m(int i) {}
// }
//
// class B extends A {
// void m(int i) {}
// }
// ```
//
// If it isn't intended to override the method from the superclass, then
// rename it:
//
// ```dart
// class A {
// void m(int i) {}
// }
//
// class B extends A {
// void m2(String s) {}
// }
// ```
static const CompileTimeErrorCode INVALID_OVERRIDE = CompileTimeErrorCode(
'INVALID_OVERRIDE',
"'{1}.{0}' ('{2}') isn't a valid override of '{3}.{0}' ('{4}').",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when `this` is used outside of an
// instance method or a generative constructor. The reserved word `this` is
// only defined in the context of an instance method or a generative
// constructor.
//
// #### Examples
//
// The following code produces this diagnostic because `v` is a top-level
// variable:
//
// ```dart
// C f() => [!this!];
//
// class C {}
// ```
//
// #### Common fixes
//
// Use a variable of the appropriate type in place of `this`, declaring it if
// necessary:
//
// ```dart
// C f(C c) => c;
//
// class C {}
// ```
static const CompileTimeErrorCode INVALID_REFERENCE_TO_THIS =
CompileTimeErrorCode('INVALID_REFERENCE_TO_THIS',
"Invalid reference to 'this' expression.",
hasPublishedDocs: true);
static const CompileTimeErrorCode INVALID_SUPER_INVOCATION =
CompileTimeErrorCode('INVALID_SUPER_INVOCATION',
"The super call must be last in an initializer list: '{0}'.");
/**
* 12.6 Lists: It is a compile time error if the type argument of a constant
* list literal includes a type parameter.
*
* Parameters:
* 0: the name of the type parameter
*/
static const CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_LIST =
CompileTimeErrorCode(
'INVALID_TYPE_ARGUMENT_IN_CONST_LIST',
"Constant list literals can't include a type parameter as a type "
"argument, such as '{0}'.",
correction:
"Try replacing the type parameter with a different type.");
/**
* 12.7 Maps: It is a compile time error if the type arguments of a constant
* map literal include a type parameter.
*
* Parameters:
* 0: the name of the type parameter
*/
static const CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_MAP =
CompileTimeErrorCode(
'INVALID_TYPE_ARGUMENT_IN_CONST_MAP',
"Constant map literals can't include a type parameter as a type "
"argument, such as '{0}'.",
correction:
"Try replacing the type parameter with a different type.");
static const CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_SET =
CompileTimeErrorCode(
'INVALID_TYPE_ARGUMENT_IN_CONST_SET',
"Constant set literals can't include a type parameter as a type "
"argument, such as '{0}'.",
correction:
"Try replacing the type parameter with a different type.");
/**
* Parameters:
* 0: the URI that is invalid
*/
// #### Description
//
// The analyzer produces this diagnostic when a URI in a directive doesn't
// conform to the syntax of a valid URI.
//
// #### Examples
//
// The following code produces this diagnostic because `'#'` isn't a valid
// URI:
//
// ```dart
// import [!'#'!];
// ```
//
// #### Common fixes
//
// Replace the invalid URI with a valid URI.
static const CompileTimeErrorCode INVALID_URI = CompileTimeErrorCode(
'INVALID_URI', "Invalid URI syntax: '{0}'.",
hasPublishedDocs: true);
/**
* The 'covariant' keyword was found in an inappropriate location.
*/
static const CompileTimeErrorCode INVALID_USE_OF_COVARIANT =
CompileTimeErrorCode(
'INVALID_USE_OF_COVARIANT',
"The 'covariant' keyword can only be used for parameters in instance "
"methods or before non-final instance fields.",
correction: "Try removing the 'covariant' keyword.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an expression whose value will
// always be `null` is dererenced.
//
// #### Example
//
// The following code produces this diagnostic because `x` will always be
// `null`:
//
// ```dart
// %experiments=non-nullable
// int f(Null x) {
// return [!x!].length;
// }
// ```
//
// #### Common fixes
//
// If the value is allowed to be something other than `null`, then change the
// type of the expression:
//
// ```dart
// %experiments=non-nullable
// int f(String? x) {
// return x!.length;
// }
// ```
static const CompileTimeErrorCode INVALID_USE_OF_NULL_VALUE =
CompileTimeErrorCode('INVALID_USE_OF_NULL_VALUE',
"An expression whose value is always 'null' can't be dereferenced.",
correction: "Try changing the type of the expression.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the extension
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is used to
// invoke a function but the extension doesn't declare a `call` method.
//
// #### Examples
//
// The following code produces this diagnostic because the extension `E`
// doesn't define a `call` method:
//
// ```dart
// extension E on String {}
//
// void f() {
// [!E('')!]();
// }
// ```
//
// #### Common fixes
//
// If the extension is intended to define a `call` method, then declare it:
//
// ```dart
// extension E on String {
// int call() => 0;
// }
//
// void f() {
// E('')();
// }
// ```
//
// If the extended type defines a `call` method, then remove the extension
// override.
//
// If the `call` method isn't defined, then rewrite the code so that it
// doesn't invoke the `call` method.
static const CompileTimeErrorCode INVOCATION_OF_EXTENSION_WITHOUT_CALL =
CompileTimeErrorCode(
'INVOCATION_OF_EXTENSION_WITHOUT_CALL',
"The extension '{0}' doesn't define a 'call' method so the override "
"can't be used in an invocation.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the identifier that is not a function type
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds a function invocation,
// but the name of the function being invoked is defined to be something other
// than a function.
//
// #### Examples
//
// The following code produces this diagnostic because `Binary` is the name of
// a function type, not a function:
//
// ```dart
// typedef Binary = int Function(int, int);
//
// int f() {
// return [!Binary!](1, 2);
// }
// ```
//
// #### Common fixes
//
// Replace the name with the name of a function.
static const CompileTimeErrorCode INVOCATION_OF_NON_FUNCTION =
CompileTimeErrorCode(
'INVOCATION_OF_NON_FUNCTION', "'{0}' isn't a function.",
// TODO(brianwilkerson) Split this error code so that we can provide
// better error and correction messages.
correction:
"Try correcting the name to match an existing function, or "
"define a method or function named '{0}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a function invocation is found,
// but the name being referenced isn't the name of a function, or when the
// expression computing the function doesn't compute a function.
//
// #### Examples
//
// The following code produces this diagnostic because `x` isn't a function:
//
// ```dart
// int x = 0;
//
// int f() => x;
//
// var y = [!x!]();
// ```
//
// The following code produces this diagnostic because `f()` doesn't return a
// function:
//
// ```dart
// int x = 0;
//
// int f() => x;
//
// var y = [!f()!]();
// ```
//
// #### Common fixes
//
// If you need to invoke a function, then replace the code before the argument
// list with the name of a function or with an expression that computes a
// function:
//
// ```dart
// int x = 0;
//
// int f() => x;
//
// var y = f();
// ```
static const CompileTimeErrorCode INVOCATION_OF_NON_FUNCTION_EXPRESSION =
CompileTimeErrorCode(
'INVOCATION_OF_NON_FUNCTION_EXPRESSION',
"The expression doesn't evaluate to a function, so it can't be "
"invoked.",
hasPublishedDocs: true);
/**
* 13.13 Break: It is a compile-time error if no such statement
* <i>s<sub>E</sub></i> exists within the innermost function in which
* <i>s<sub>b</sub></i> occurs.
*
* 13.14 Continue: It is a compile-time error if no such statement or case
* clause <i>s<sub>E</sub></i> exists within the innermost function in which
* <i>s<sub>c</sub></i> occurs.
*
* Parameters:
* 0: the name of the unresolvable label
*/
static const CompileTimeErrorCode LABEL_IN_OUTER_SCOPE = CompileTimeErrorCode(
'LABEL_IN_OUTER_SCOPE',
"Can't reference label '{0}' declared in an outer method.");
/**
* 13.13 Break: It is a compile-time error if no such statement
* <i>s<sub>E</sub></i> exists within the innermost function in which
* <i>s<sub>b</sub></i> occurs.
*
* 13.14 Continue: It is a compile-time error if no such statement or case
* clause <i>s<sub>E</sub></i> exists within the innermost function in which
* <i>s<sub>c</sub></i> occurs.
*
* Parameters:
* 0: the name of the unresolvable label
*/
static const CompileTimeErrorCode LABEL_UNDEFINED = CompileTimeErrorCode(
'LABEL_UNDEFINED', "Can't reference undefined label '{0}'.",
correction: "Try defining the label, or "
"correcting the name to match an existing label.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class that has at least one
// `const` constructor also has a field marked both `late` and `final`.
//
// #### Example
//
// The following code produces this diagnostic because the class `A` has a
// `const` constructor and the `final` field `f` is marked as `late`:
//
// ```dart
// %experiments=non-nullable
// class A {
// [!late!] final int f;
//
// const A();
// }
// ```
//
// #### Common fixes
//
// If the field doesn't need to be marked `late`, then remove the `late`
// modifier from the field:
//
// ```dart
// class A {
// final int f = 0;
//
// const A();
// }
// ```
//
// If the field must be marked `late`, then remove the `const` modifier from
// the constructors:
//
// ```dart
// %experiments=non-nullable
// class A {
// late final int f;
//
// A();
// }
// ```
static const CompileTimeErrorCode LATE_FINAL_FIELD_WITH_CONST_CONSTRUCTOR =
CompileTimeErrorCode('LATE_FINAL_FIELD_WITH_CONST_CONSTRUCTOR',
"Can't have a late final field in a class with a const constructor.",
correction: "Try removing the 'late' modifier, or don't declare "
"'const' constructors.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the analyzer can prove that a
// local variable marked as both `late` and `final` was already assigned a
// value at the point where another assignment occurs.
//
// Because `final` variables can only be assigned once, subsequent assignments
// are guaranteed to fail, so they're flagged.
//
// #### Example
//
// The following code produces this diagnostic because the `final` variable
// `v` is assigned a value in two places:
//
// ```dart
// %experiments=non-nullable
// int f() {
// late final int v;
// v = 0;
// [!v!] += 1;
// return v;
// }
// ```
//
// #### Common fixes
//
// If you need to be able to reassign the variable, then remove the `final`
// keyword:
//
// ```dart
// %experiments=non-nullable
// int f() {
// late int v;
// v = 0;
// v += 1;
// return v;
// }
// ```
//
// If you don't need to reassign the variable, then remove all except the
// first of the assignments:
//
// ```dart
// %experiments=non-nullable
// int f() {
// late final int v;
// v = 0;
// return v;
// }
// ```
static const CompileTimeErrorCode LATE_FINAL_LOCAL_ALREADY_ASSIGNED =
CompileTimeErrorCode('LATE_FINAL_LOCAL_ALREADY_ASSIGNED',
"The late final local variable is already assigned.",
correction: "Try removing the 'final' modifier, or don't reassign "
"the value.");
/**
* Parameters:
* 0: the actual type of the list element
* 1: the expected type of the list element
*/
// #### Description
//
// The analyzer produces this diagnostic when the type of an element in a list
// literal isn't assignable to the element type of the list.
//
// #### Examples
//
// The following code produces this diagnostic because `2.5` is a double, and
// the list can hold only integers:
//
// ```dart
// List<int> x = [1, [!2.5!], 3];
// ```
//
// #### Common fixes
//
// If you intended to add a different object to the list, then replace the
// element with an expression that computes the intended object:
//
// ```dart
// List<int> x = [1, 2, 3];
// ```
//
// If the object shouldn't be in the list, then remove the element:
//
// ```dart
// List<int> x = [1, 3];
// ```
//
// If the object being computed is correct, then widen the element type of the
// list to allow all of the different types of objects it needs to contain:
//
// ```dart
// List<num> x = [1, 2.5, 3];
// ```
static const CompileTimeErrorCode LIST_ELEMENT_TYPE_NOT_ASSIGNABLE =
CompileTimeErrorCode('LIST_ELEMENT_TYPE_NOT_ASSIGNABLE',
"The element type '{0}' can't be assigned to the list type '{1}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a map entry (a key/value pair)
// is found in a set literal.
//
// #### Examples
//
// The following code produces this diagnostic because the literal has a map
// entry even though it's a set literal:
//
// ```dart
// const collection = <String>{[!'a' : 'b'!]};
// ```
//
// #### Common fixes
//
// If you intended for the collection to be a map, then change the code so
// that it is a map. In the previous example, you could do this by adding
// another type argument:
//
// ```dart
// const collection = <String, String>{'a' : 'b'};
// ```
//
// In other cases, you might need to change the explicit type from `Set` to
// `Map`.
//
// If you intended for the collection to be a set, then remove the map entry,
// possibly by replacing the colon with a comma if both values should be
// included in the set:
//
// ```dart
// const collection = <String>{'a', 'b'};
// ```
static const CompileTimeErrorCode MAP_ENTRY_NOT_IN_MAP = CompileTimeErrorCode(
'MAP_ENTRY_NOT_IN_MAP', "Map entries can only be used in a map literal.",
correction: "Try converting the collection to a map or removing the map "
"entry.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the expression being used as a key
* 1: the type of keys declared for the map
*/
// #### Description
//
// The analyzer produces this diagnostic when a key of a key-value pair in a
// map literal has a type that isn't assignable to the key type of the map.
//
// #### Examples
//
// The following code produces this diagnostic because `2` is an `int`, but
// the keys of the map are required to be `String`s:
//
// ```dart
// var m = <String, String>{[!2!] : 'a'};
// ```
//
// #### Common fixes
//
// If the type of the map is correct, then change the key to have the correct
// type:
//
// ```dart
// var m = <String, String>{'2' : 'a'};
// ```
//
// If the type of the key is correct, then change the key type of the map:
//
// ```dart
// var m = <int, String>{2 : 'a'};
// ```
static const CompileTimeErrorCode MAP_KEY_TYPE_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'MAP_KEY_TYPE_NOT_ASSIGNABLE',
"The element type '{0}' can't be assigned to the map key type "
"'{1}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the expression being used as a value
* 1: the type of values declared for the map
*/
// #### Description
//
// The analyzer produces this diagnostic when a value of a key-value pair in a
// map literal has a type that isn't assignable to the the value type of the
// map.
//
// #### Examples
//
// The following code produces this diagnostic because `2` is an `int`, but/
// the values of the map are required to be `String`s:
//
// ```dart
// var m = <String, String>{'a' : [!2!]};
// ```
//
// #### Common fixes
//
// If the type of the map is correct, then change the value to have the
// correct type:
//
// ```dart
// var m = <String, String>{'a' : '2'};
// ```
//
// If the type of the value is correct, then change the value type of the map:
//
// ```dart
// var m = <String, int>{'a' : 2};
// ```
static const CompileTimeErrorCode MAP_VALUE_TYPE_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'MAP_VALUE_TYPE_NOT_ASSIGNABLE',
"The element type '{0}' can't be assigned to the map value type "
"'{1}'.",
hasPublishedDocs: true);
/**
* 12.1 Constants: A constant expression is ... a constant list literal.
*/
static const CompileTimeErrorCode MISSING_CONST_IN_LIST_LITERAL =
CompileTimeErrorCode(
'MISSING_CONST_IN_LIST_LITERAL',
"List literals must be prefixed with 'const' when used as a constant "
"expression.",
correction: "Try adding the keyword 'const' before the literal.");
/**
* 12.1 Constants: A constant expression is ... a constant map literal.
*/
static const CompileTimeErrorCode MISSING_CONST_IN_MAP_LITERAL =
CompileTimeErrorCode(
'MISSING_CONST_IN_MAP_LITERAL',
"Map literals must be prefixed with 'const' when used as a constant "
"expression.",
correction: "Try adding the keyword 'const' before the literal.");
/**
* 12.1 Constants: A constant expression is ... a constant set literal.
*/
static const CompileTimeErrorCode MISSING_CONST_IN_SET_LITERAL =
CompileTimeErrorCode(
'MISSING_CONST_IN_SET_LITERAL',
"Set literals must be prefixed with 'const' when used as a constant "
"expression.",
correction: "Try adding the keyword 'const' before the literal.");
static const CompileTimeErrorCode MISSING_DART_LIBRARY = CompileTimeErrorCode(
'MISSING_DART_LIBRARY', "Required library '{0}' is missing.",
correction: "Check your Dart SDK installation for completeness.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an optional parameter, whether
// positional or named, has a [potentially non-nullable][] type and doesn't
// specify a default value. Optional parameters that have no explicit default
// value have an implicit default value of `null`. If the type of the
// parameter doesn't allow the parameter to have a value of `null`, then the
// implicit default value isn't valid.
//
// #### Example
//
// The following code produces this diagnostic because `x` can't be `null`,
// and no non-`null` default value is specified:
//
// ```dart
// %experiments=non-nullable
// void f([int [!x!]]) {}
// ```
//
// As does this:
//
// ```dart
// %experiments=non-nullable
// void g({int [!x!]}) {}
// ```
//
// #### Common fixes
//
// If you want to use `null` to indicate that no value was provided, then you
// need to make the type nullable:
//
// ```dart
// %experiments=non-nullable
// void f([int? x]) {}
// void g({int? x}) {}
// ```
//
// If the parameter can't be null, then either provide a default value:
//
// ```dart
// %experiments=non-nullable
// void f([int x = 1]) {}
// void g({int x = 2}) {}
// ```
//
// or make the parameter a required parameter:
//
// ```dart
// %experiments=non-nullable
// void f(int x) {}
// void g({required int x}) {}
// ```
static const CompileTimeErrorCode MISSING_DEFAULT_VALUE_FOR_PARAMETER =
CompileTimeErrorCode(
'MISSING_DEFAULT_VALUE_FOR_PARAMETER',
"The parameter '{0}' can't have a value of 'null' because of its "
"type, and no non-null default value is provided.",
correction:
"Try adding either a default value or the 'required' modifier.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the parameter
*/
// #### Description
//
// The analyzer produces this diagnostic when an invocation of a function is
// missing a required named parameter.
//
// #### Example
//
// The following code produces this diagnostic because the invocation of `f`
// doesn't include a value for the required named parameter `end`:
//
// ```dart
// %experiments=non-nullable
// void f(int start, {required int end}) {}
// void g() {
// [!f!](3);
// }
// ```
//
// #### Common fixes
//
// Add a named argument corresponding to the missing required parameter:
//
// ```dart
// %experiments=non-nullable
// void f(int start, {required int end}) {}
// void g() {
// f(3, end: 5);
// }
// ```
static const CompileTimeErrorCode MISSING_REQUIRED_ARGUMENT =
CompileTimeErrorCode(
'MISSING_REQUIRED_ARGUMENT',
"The named parameter '{0}' is required, but there's no corresponding "
"argument.",
correction: "Try adding the required argument.",
hasPublishedDocs: true);
/**
* It's a compile-time error to apply a mixin containing super-invocations to
* a class that doesn't have a concrete implementation of the super-invoked
* members compatible with the super-constraint interface.
*
* This ensures that if more than one super-constraint interface declares a
* member with the same name, at least one of those members is more specific
* than the rest, and this is the unique signature that super-invocations
* are allowed to invoke.
*
* Parameters:
* 0: the name of the super-invoked member
* 1: the display name of the type of the super-invoked member in the mixin
* 2: the display name of the type of the concrete member in the class
*/
static const CompileTimeErrorCode
MIXIN_APPLICATION_CONCRETE_SUPER_INVOKED_MEMBER_TYPE =
CompileTimeErrorCode(
'MIXIN_APPLICATION_CONCRETE_SUPER_INVOKED_MEMBER_TYPE',
"The super-invoked member '{0}' has the type '{1}', but the "
"concrete member in the class has type '{2}'.");
/**
* It's a compile-time error to apply a mixin containing super-invocations to
* a class that doesn't have a concrete implementation of the super-invoked
* members compatible with the super-constraint interface.
*
* Parameters:
* 0: the display name of the member without a concrete implementation
*/
static const CompileTimeErrorCode
MIXIN_APPLICATION_NO_CONCRETE_SUPER_INVOKED_MEMBER = CompileTimeErrorCode(
'MIXIN_APPLICATION_NO_CONCRETE_SUPER_INVOKED_MEMBER',
"The class doesn't have a concrete implementation of the "
"super-invoked member '{0}'.");
/**
* It's a compile-time error to apply a mixin to a class that doesn't
* implement all the `on` type requirements of the mixin declaration.
*
* Parameters:
* 0: the display name of the mixin
* 1: the display name of the superclass
* 2: the display name of the type that is not implemented
*/
static const CompileTimeErrorCode
MIXIN_APPLICATION_NOT_IMPLEMENTED_INTERFACE = CompileTimeErrorCode(
'MIXIN_APPLICATION_NOT_IMPLEMENTED_INTERFACE',
"'{0}' can't be mixed onto '{1}' because '{1}' doesn't implement "
"'{2}'.",
correction: "Try extending the class '{0}'.");
/**
* 9 Mixins: It is a compile-time error if a declared or derived mixin
* explicitly declares a constructor.
*
* Parameters:
* 0: the name of the mixin that is invalid
*/
static const CompileTimeErrorCode MIXIN_CLASS_DECLARES_CONSTRUCTOR =
CompileTimeErrorCode(
'MIXIN_CLASS_DECLARES_CONSTRUCTOR',
"The class '{0}' can't be used as a mixin because it declares a "
"constructor.");
/**
* The <i>mixinMember</i> production allows the same instance or static
* members that a class would allow, but no constructors (for now).
*/
static const CompileTimeErrorCode MIXIN_DECLARES_CONSTRUCTOR =
CompileTimeErrorCode(
'MIXIN_DECLARES_CONSTRUCTOR', "Mixins can't declare constructors.");
/**
* 9.1 Mixin Application: It is a compile-time error if the with clause of a
* mixin application <i>C</i> includes a deferred type expression.
*
* Parameters:
* 0: the name of the type that cannot be extended
*
* See [EXTENDS_DEFERRED_CLASS], and [IMPLEMENTS_DEFERRED_CLASS].
*/
static const CompileTimeErrorCode MIXIN_DEFERRED_CLASS = CompileTimeErrorCode(
'MIXIN_DEFERRED_CLASS', "Classes can't mixin deferred classes.",
correction: "Try changing the import to not be deferred.");
static const CompileTimeErrorCode
MIXIN_INFERENCE_INCONSISTENT_MATCHING_CLASSES = CompileTimeErrorCode(
'MIXIN_INFERENCE_INCONSISTENT_MATCHING_CLASSES',
"Type parameters couldn't be inferred for the mixin '{0}' because "
"the base class implements the mixin's supertype constraint "
"'{1}' in multiple conflicting ways");
static const CompileTimeErrorCode MIXIN_INFERENCE_NO_MATCHING_CLASS =
CompileTimeErrorCode(
'MIXIN_INFERENCE_NO_MATCHING_CLASS',
"Type parameters couldn't be inferred for the mixin '{0}' because "
"the base class doesn't implement the mixin's supertype "
"constraint '{1}'");
static const CompileTimeErrorCode MIXIN_INFERENCE_NO_POSSIBLE_SUBSTITUTION =
CompileTimeErrorCode(
'MIXIN_INFERENCE_NO_POSSIBLE_SUBSTITUTION',
"Type parameters couldn't be inferred for the mixin '{0}' because "
"no type parameter substitution could be found matching the "
"mixin's supertype constraints");
/**
* 9 Mixins: It is a compile-time error if a mixin is derived from a class
* whose superclass is not Object.
*
* Parameters:
* 0: the name of the mixin that is invalid
*/
static const CompileTimeErrorCode MIXIN_INHERITS_FROM_NOT_OBJECT =
CompileTimeErrorCode(
'MIXIN_INHERITS_FROM_NOT_OBJECT',
"The class '{0}' can't be used as a mixin because it extends a class "
"other than Object.");
/**
* A mixin declaration introduces a mixin and an interface, but not a class.
*/
static const CompileTimeErrorCode MIXIN_INSTANTIATE = CompileTimeErrorCode(
'MIXIN_INSTANTIATE', "Mixins can't be instantiated.");
/**
* Parameters:
* 0: The name of the disallowed type
*/
static const CompileTimeErrorCode MIXIN_OF_DISALLOWED_CLASS =
CompileTimeErrorCodeWithUniqueName('SUBTYPE_OF_DISALLOWED_TYPE',
'MIXIN_OF_DISALLOWED_CLASS', "Classes can't mixin '{0}'.",
correction: "Try specifying a different class or mixin, or "
"remove the class or mixin from the list.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a name in a `with` clause is
// defined to be something other than a mixin or a class.
//
// #### Examples
//
// The following code produces this diagnostic because `F` is defined to be a
// function type:
//
// ```dart
// typedef F = int Function(String);
//
// class C with [!F!] {}
// ```
//
// #### Common fixes
//
// Remove the invalid name from the list, possibly replacing it with the name
// of the intended mixin or class:
//
// ```dart
// typedef F = int Function(String);
//
// class C {}
// ```
static const CompileTimeErrorCode MIXIN_OF_NON_CLASS = CompileTimeErrorCode(
'MIXIN_OF_NON_CLASS', "Classes can only mix in mixins and classes.",
hasPublishedDocs: true);
/**
* No parameters.
*/
static const CompileTimeErrorCode
MIXIN_SUPER_CLASS_CONSTRAINT_DEFERRED_CLASS = CompileTimeErrorCode(
'MIXIN_SUPER_CLASS_CONSTRAINT_DEFERRED_CLASS',
"Deferred classes can't be used as super-class constraints.",
correction: "Try changing the import to not be deferred.");
/**
* Parameters:
* 0: The name of the disallowed type
*/
static const CompileTimeErrorCode
MIXIN_SUPER_CLASS_CONSTRAINT_DISALLOWED_CLASS =
CompileTimeErrorCodeWithUniqueName(
'SUBTYPE_OF_DISALLOWED_TYPE',
'MIXIN_SUPER_CLASS_CONSTRAINT_DISALLOWED_CLASS',
"''{0}' can't be used as a superclass constraint.",
correction: "Try specifying a different super-class constraint, or "
"remove the 'on' clause.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a type following the `on`
// keyword in a mixin declaration is neither a class nor a mixin.
//
// #### Examples
//
// The following code produces this diagnostic because `F` is neither a class
// nor a mixin:
//
// ```dart
// typedef F = void Function();
//
// mixin M on [!F!] {}
// ```
//
// #### Common fixes
//
// If the type was intended to be a class but was mistyped, then replace the
// name.
//
// Otherwise, remove the type from the `on` clause.
static const CompileTimeErrorCode MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE =
CompileTimeErrorCode('MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE',
"Only classes and mixins can be used as superclass constraints.",
hasPublishedDocs: true);
/**
* 9.1 Mixin Application: It is a compile-time error if <i>S</i> does not
* denote a class available in the immediately enclosing scope.
*/
static const CompileTimeErrorCode MIXIN_WITH_NON_CLASS_SUPERCLASS =
CompileTimeErrorCode('MIXIN_WITH_NON_CLASS_SUPERCLASS',
"Mixin can only be applied to class.");
/**
* Technically this is [IMPLEMENTS_SUPER_CLASS].
* See https://github.com/dart-lang/sdk/issues/25765#issuecomment-307422593
*
* Parameters:
* 0: the name of the class that appears in both "extends" and "with" clauses
*/
static const CompileTimeErrorCode MIXINS_SUPER_CLASS = CompileTimeErrorCode(
'MIXINS_SUPER_CLASS',
"'{0}' can't be used in both 'extends' and 'with' clauses.",
correction: "Try removing one of the occurrences.");
/**
* 7.6.1 Generative Constructors: A generative constructor may be redirecting,
* in which case its only action is to invoke another generative constructor.
*/
static const CompileTimeErrorCode
MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS = CompileTimeErrorCode(
'MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS',
"Constructors can have at most one 'this' redirection.",
correction: "Try removing all but one of the redirections.");
/**
* 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor.
* Then <i>k</i> may include at most one superinitializer in its initializer
* list or a compile time error occurs.
*/
static const CompileTimeErrorCode MULTIPLE_SUPER_INITIALIZERS =
CompileTimeErrorCode('MULTIPLE_SUPER_INITIALIZERS',
"Constructor may have at most one 'super' initializer.",
correction: "Try removing all but one of the 'super' initializers.");
/**
* Parameters:
* 0: the name of the non-type element
*/
// #### Description
//
// The analyzer produces this diagnostic when an instance creation using
// either `new` or `const` specifies a name that isn't defined as a class.
//
// #### Example
//
// The following code produces this diagnostic because `f` is a function
// rather than a class:
//
// ```dart
// int f() => 0;
//
// void g() {
// new [!f!]();
// }
// ```
//
// #### Common fixes
//
// If a class should be created, then replace the invalid name with the name
// of a valid class:
//
// ```dart
// int f() => 0;
//
// void g() {
// new Object();
// }
// ```
//
// If the name is the name of a function and you want that function to be
// invoked, then remove the `new` or `const` keyword:
//
// ```dart
// int f() => 0;
//
// void g() {
// f();
// }
// ```
static const CompileTimeErrorCode NEW_WITH_NON_TYPE =
CompileTimeErrorCodeWithUniqueName('CREATION_WITH_NON_TYPE',
'NEW_WITH_NON_TYPE', "The name '{0}' isn't a class.",
correction: "Try correcting the name to match an existing class.",
isUnresolvedIdentifier: true);
/**
* 12.11.1 New: If <i>T</i> is a class or parameterized type accessible in the
* current scope then:
* 1. If <i>e</i> is of the form <i>new T.id(a<sub>1</sub>, &hellip;,
* a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;,
* x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a static warning if
* <i>T.id</i> is not the name of a constructor declared by the type
* <i>T</i>.
* If <i>e</i> of the form <i>new T(a<sub>1</sub>, &hellip;, a<sub>n</sub>,
* x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;, x<sub>n+k</sub>:
* a<sub>n+kM/sub>)</i> it is a static warning if the type <i>T</i> does not
* declare a constructor with the same name as the declaration of <i>T</i>.
*/
static const CompileTimeErrorCode NEW_WITH_UNDEFINED_CONSTRUCTOR =
CompileTimeErrorCode('NEW_WITH_UNDEFINED_CONSTRUCTOR',
"The class '{0}' doesn't have a constructor named '{1}'.",
correction: "Try invoking a different constructor, or "
"define a constructor named '{1}'.");
/**
* Parameters:
* 0: the name of the class being instantiated
*/
// #### Description
//
// The analyzer produces this diagnostic when an unnamed constructor is
// invoked on a class that defines named constructors but the class doesn’t
// have an unnamed constructor.
//
// #### Examples
//
// The following code produces this diagnostic because `A` doesn't define an
// unnamed constructor:
//
// ```dart
// class A {
// A.a();
// }
//
// A f() => [!A!]();
// ```
//
// #### Common fixes
//
// If one of the named constructors does what you need, then use it:
//
// ```dart
// class A {
// A.a();
// }
//
// A f() => A.a();
// ```
//
// If none of the named constructors does what you need, and you're able to
// add an unnamed constructor, then add the constructor:
//
// ```dart
// class A {
// A();
// A.a();
// }
//
// A f() => A();
// ```
static const CompileTimeErrorCode NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT =
CompileTimeErrorCode('NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT',
"The class '{0}' doesn't have a default constructor.",
correction:
"Try using one of the named constructors defined in '{0}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an annotation consists of a
// single identifier, but that identifier is the name of a class rather than a
// variable. To create an instance of the class, the identifier must be
// followed by an argument list.
//
// #### Examples
//
// The following code produces this diagnostic because `C` is a class, and a
// class can't be used as an annotation without invoking a `const` constructor
// from the class:
//
// ```dart
// class C {
// const C();
// }
//
// [!@C!]
// var x;
// ```
//
// #### Common fixes
//
// Add the missing argument list:
//
// ```dart
// class C {
// const C();
// }
//
// @C()
// var x;
// ```
static const CompileTimeErrorCode NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS =
CompileTimeErrorCode('NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS',
"Annotation creation must have arguments.",
correction: "Try adding an empty argument list.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the class where override error was detected
* 1: the list of candidate signatures which cannot be combined
*/
// #### Description
//
// The analyzer produces this diagnostic when there is a method declaration
// for which one or more types needs to be inferred, and those types can't be
// inferred because none of the overridden methods has a function type that is
// a supertype of all the other overridden methods, as specified by
// [override inference][].
//
// #### Example
//
// The following code produces this diagnostic because the method `m` declared
// in the class `C` is missing both the return type and the type of the
// parameter `a`, and neither of the missing types can be inferred for it:
//
// ```dart
// abstract class A {
// A m(String a);
// }
//
// abstract class B {
// B m(int a);
// }
//
// abstract class C implements A, B {
// [!m!](a);
// }
// ```
//
// In this example, override inference can't be performed because the
// overridden methods are incompatible in these ways:
// - Neither parameter type (`String` and `int`) is a supertype of the other.
// - Neither return type is a subtype of the other.
//
// #### Common fixes
//
// If possible, add types to the method in the subclass that are consistent
// with the types from all the overridden methods:
//
// ```dart
// abstract class A {
// A m(String a);
// }
//
// abstract class B {
// B m(int a);
// }
//
// abstract class C implements A, B {
// C m(Object a);
// }
// ```
static const CompileTimeErrorCode NO_COMBINED_SUPER_SIGNATURE =
CompileTimeErrorCode('NO_COMBINED_SUPER_SIGNATURE',
"Can't infer missing types in '{0}' from overridden methods: {1}.",
correction: "Try providing explicit types for this method's "
"parameters and return type.");
/**
* Parameters:
* 0: the name of the superclass that does not define an implicitly invoked
* constructor
*/
static const CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT =
CompileTimeErrorCodeWithUniqueName(
'NO_DEFAULT_SUPER_CONSTRUCTOR',
'NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT',
"The superclass '{0}' doesn't have a zero argument constructor.",
correction: "Try declaring a zero argument constructor in '{0}', or "
"explicitly invoking a different constructor in '{0}'.");
/**
* User friendly specialized error for [NON_GENERATIVE_CONSTRUCTOR]. This
* handles the case of `class E extends Exception` which will never work
* because [Exception] has no generative constructors.
*/
static const CompileTimeErrorCode NO_GENERATIVE_CONSTRUCTORS_IN_SUPERCLASS =
CompileTimeErrorCode(
'NO_GENERATIVE_CONSTRUCTOR_IN_SUPERCLASS',
"The class '{0}' cannot extend '{1}' because '{1}' only has factory "
"constructors (no generative constructors), and '{0}' has at "
"least one generative constructor.",
correction: "Try implementing the class instead, adding a generative "
"(not factory) constructor to the superclass {0}, or a factory "
"constructor to the subclass.");
/**
* Parameters:
* 0: the name of the superclass that does not define an implicitly invoked
* constructor
* 1: the name of the subclass that does not contain any explicit constructors
*/
static const CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT =
CompileTimeErrorCodeWithUniqueName(
'NO_DEFAULT_SUPER_CONSTRUCTOR',
'NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT',
"The superclass '{0}' doesn't have a zero argument constructor.",
correction: "Try declaring a zero argument constructor in '{0}', or "
"declaring a constructor in {1} that explicitly invokes a "
"constructor in '{0}'.");
/**
* Parameters:
* 0: the name of the first member
* 1: the name of the second member
* 2: the name of the third member
* 3: the name of the fourth member
* 4: the number of additional missing members that aren't listed
*/
static const CompileTimeErrorCode
NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS =
CompileTimeErrorCodeWithUniqueName(
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER',
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS',
"Missing concrete implementations of '{0}', '{1}', '{2}', '{3}', and "
"{4} more.",
correction: "Try implementing the missing methods, or make the class "
"abstract.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the first member
* 1: the name of the second member
* 2: the name of the third member
* 3: the name of the fourth member
*/
static const CompileTimeErrorCode
NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR =
CompileTimeErrorCodeWithUniqueName(
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER',
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR',
"Missing concrete implementations of '{0}', '{1}', '{2}', and '{3}'.",
correction: "Try implementing the missing methods, or make the class "
"abstract.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the member
*/
// #### Description
//
// The analyzer produces this diagnostic when a concrete class inherits one or
// more abstract members, and doesn't provide or inherit an implementation for
// at least one of those abstract members.
//
// #### Examples
//
// The following code produces this diagnostic because the class `B` doesn't
// have a concrete implementation of `m`:
//
// ```dart
// abstract class A {
// void m();
// }
//
// class [!B!] extends A {}
// ```
//
// #### Common fixes
//
// If the subclass can provide a concrete implementation for some or all of
// the abstract inherited members, then add the concrete implementations:
//
// ```dart
// abstract class A {
// void m();
// }
//
// class B extends A {
// void m() {}
// }
// ```
//
// If there is a mixin that provides an implementation of the inherited
// methods, then apply the mixin to the subclass:
//
// ```dart
// abstract class A {
// void m();
// }
//
// class B extends A with M {}
//
// mixin M {
// void m() {}
// }
// ```
//
// If the subclass can't provide a concrete implementation for all of the
// abstract inherited members, then mark the subclass as being abstract:
//
// ```dart
// abstract class A {
// void m();
// }
//
// abstract class B extends A {}
// ```
static const CompileTimeErrorCode
NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE =
CompileTimeErrorCodeWithUniqueName(
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER',
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE',
"Missing concrete implementation of '{0}'.",
correction: "Try implementing the missing method, or make the class "
"abstract.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the first member
* 1: the name of the second member
* 2: the name of the third member
*/
static const CompileTimeErrorCode
NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE =
CompileTimeErrorCodeWithUniqueName(
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER',
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE',
"Missing concrete implementations of '{0}', '{1}', and '{2}'.",
correction: "Try implementing the missing methods, or make the class "
"abstract.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the first member
* 1: the name of the second member
*/
static const CompileTimeErrorCode
NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO =
CompileTimeErrorCodeWithUniqueName(
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER',
'NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO',
"Missing concrete implementations of '{0}' and '{1}'.",
correction: "Try implementing the missing methods, or make the class "
"abstract.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a condition, such as an `if` or
// `while` loop, doesn't have the static type `bool`.
//
// #### Examples
//
// The following code produces this diagnostic because `x` has the static type
// `int`:
//
// ```dart
// void f(int x) {
// if ([!x!]) {
// // ...
// }
// }
// ```
//
// #### Common fixes
//
// Change the condition so that it produces a Boolean value:
//
// ```dart
// void f(int x) {
// if (x == 0) {
// // ...
// }
// }
// ```
static const CompileTimeErrorCode NON_BOOL_CONDITION = CompileTimeErrorCode(
'NON_BOOL_CONDITION', "Conditions must have a static type of 'bool'.",
correction: "Try changing the condition.", hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the first expression in an
// assert has a type other than `bool`.
//
// #### Examples
//
// The following code produces this diagnostic because the type of `p` is
// `int`, but a `bool` is required:
//
// ```dart
// void f(int p) {
// assert([!p!]);
// }
// ```
//
// #### Common fixes
//
// Change the expression so that it has the type `bool`:
//
// ```dart
// void f(int p) {
// assert(p > 0);
// }
// ```
static const CompileTimeErrorCode NON_BOOL_EXPRESSION = CompileTimeErrorCode(
'NON_BOOL_EXPRESSION',
"The expression in an assert must be of type 'bool'.",
correction: "Try changing the expression.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the operand of the unary
// negation operator (`!`) doesn't have the type `bool`.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is an `int` when it
// must be a `bool`:
//
// ```dart
// int x = 0;
// bool y = ![!x!];
// ```
//
// #### Common fixes
//
// Replace the operand with an expression that has the type `bool`:
//
// ```dart
// int x = 0;
// bool y = !(x > 0);
// ```
static const CompileTimeErrorCode NON_BOOL_NEGATION_EXPRESSION =
CompileTimeErrorCode('NON_BOOL_NEGATION_EXPRESSION',
"A negation operand must have a static type of 'bool'.",
correction: "Try changing the operand to the '!' operator.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the lexeme of the logical operator
*/
// #### Description
//
// The analyzer produces this diagnostic when one of the operands of either
// the `&&` or `||` operator doesn't have the type `bool`.
//
// #### Examples
//
// The following code produces this diagnostic because `a` isn't a Boolean
// value:
//
// ```dart
// int a = 3;
// bool b = [!a!] || a > 1;
// ```
//
// #### Common fixes
//
// Change the operand to a Boolean value:
//
// ```dart
// int a = 3;
// bool b = a == 0 || a > 1;
// ```
static const CompileTimeErrorCode NON_BOOL_OPERAND = CompileTimeErrorCode(
'NON_BOOL_OPERAND',
"The operands of the operator '{0}' must be assignable to 'bool'.",
hasPublishedDocs: true);
/**
* 13.2 Expression Statements: It is a compile-time error if a non-constant
* map literal that has no explicit type arguments appears in a place where a
* statement is expected.
*/
static const CompileTimeErrorCode NON_CONST_MAP_AS_EXPRESSION_STATEMENT =
CompileTimeErrorCode(
'NON_CONST_MAP_AS_EXPRESSION_STATEMENT',
"A non-constant map or set literal without type arguments can't be "
"used as an expression statement.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an annotation is the invocation
// of an existing constructor even though the invoked constructor isn't a
// const constructor.
//
// #### Example
//
// The following code produces this diagnostic because the constructor for `C`
// isn't a const constructor:
//
// ```dart
// [!@C()!]
// void f() {
// }
//
// class C {
// C();
// }
// ```
//
// #### Common fixes
//
// If it's valid for the class to have a const constructor, then create a
// const constructor that can be used for the annotation:
//
// ```dart
// @C()
// void f() {
// }
//
// class C {
// const C();
// }
// ```
//
// If it isn't valid for the class to have a const constructor, then either
// remove the annotation or use a different class for the annotation.
static const CompileTimeErrorCode NON_CONSTANT_ANNOTATION_CONSTRUCTOR =
CompileTimeErrorCode('NON_CONSTANT_ANNOTATION_CONSTRUCTOR',
"Annotation creation can only call a const constructor.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the expression in a `case`
// clause isn't a constant expression.
//
// #### Examples
//
// The following code produces this diagnostic because `j` isn't a constant:
//
// ```dart
// void f(int i, int j) {
// switch (i) {
// case [!j!]:
// // ...
// break;
// }
// }
// ```
//
// #### Common fixes
//
// Either make the expression a constant expression, or rewrite the `switch`
// statement as a sequence of `if` statements:
//
// ```dart
// void f(int i, int j) {
// if (i == j) {
// // ...
// }
// }
// ```
static const CompileTimeErrorCode NON_CONSTANT_CASE_EXPRESSION =
CompileTimeErrorCode(
'NON_CONSTANT_CASE_EXPRESSION', "Case expressions must be constant.",
hasPublishedDocs: true);
/**
* 13.9 Switch: Given a switch statement of the form <i>switch (e) {
* label<sub>11</sub> &hellip; label<sub>1j1</sub> case e<sub>1</sub>:
* s<sub>1</sub> &hellip; label<sub>n1</sub> &hellip; label<sub>njn</sub> case
* e<sub>n</sub>: s<sub>n</sub> default: s<sub>n+1</sub>}</i> or the form
* <i>switch (e) { label<sub>11</sub> &hellip; label<sub>1j1</sub> case
* e<sub>1</sub>: s<sub>1</sub> &hellip; label<sub>n1</sub> &hellip;
* label<sub>njn</sub> case e<sub>n</sub>: s<sub>n</sub>}</i>, it is a
* compile-time error if the expressions <i>e<sub>k</sub></i> are not
* compile-time constants, for all <i>1 &lt;= k &lt;= n</i>.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode
NON_CONSTANT_CASE_EXPRESSION_FROM_DEFERRED_LIBRARY = CompileTimeErrorCode(
'NON_CONSTANT_CASE_EXPRESSION_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as a case "
"expression.",
correction:
"Try re-writing the switch as a series of if statements, or "
"changing the import to not be deferred.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an optional parameter, either
// named or positional, has a default value that isn't a compile-time
// constant.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// var defaultValue = 3;
//
// void f([int value = [!defaultValue!]]) {}
// ```
//
// #### Common fixes
//
// If the default value can be converted to be a constant, then convert it:
//
// ```dart
// const defaultValue = 3;
//
// void f([int value = defaultValue]) {}
// ```
//
// If the default value needs to change over time, then apply the default
// value inside the function:
//
// ```dart
// var defaultValue = 3;
//
// void f([int value]) {
// value ??= defaultValue;
// }
// ```
static const CompileTimeErrorCode NON_CONSTANT_DEFAULT_VALUE =
CompileTimeErrorCode('NON_CONSTANT_DEFAULT_VALUE',
"The default value of an optional parameter must be constant.",
hasPublishedDocs: true);
/**
* 6.2.2 Optional Formals: It is a compile-time error if the default value of
* an optional parameter is not a compile-time constant.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode
NON_CONSTANT_DEFAULT_VALUE_FROM_DEFERRED_LIBRARY = CompileTimeErrorCode(
'NON_CONSTANT_DEFAULT_VALUE_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as a default "
"parameter value.",
correction:
"Try leaving the default as null and initializing the parameter "
"inside the function body.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an element in a constant list
// literal isn't a constant value. The list literal can be constant either
// explicitly (because it's prefixed by the `const` keyword) or implicitly
// (because it appears in a [constant context][]).
//
// #### Examples
//
// The following code produces this diagnostic because `x` isn't a constant,
// even though it appears in an implicitly constant list literal:
//
// ```dart
// var x = 2;
// var y = const <int>[0, 1, [!x!]];
// ```
//
// #### Common fixes
//
// If the list needs to be a constant list, then convert the element to be a
// constant. In the example above, you might add the `const` keyword to the
// declaration of `x`:
//
// ```dart
// const x = 2;
// var y = const <int>[0, 1, x];
// ```
//
// If the expression can't be made a constant, then the list can't be a
// constant either, so you must change the code so that the list isn't a
// constant. In the example above this means removing the `const` keyword
// before the list literal:
//
// ```dart
// var x = 2;
// var y = <int>[0, 1, x];
// ```
static const CompileTimeErrorCode NON_CONSTANT_LIST_ELEMENT =
CompileTimeErrorCode('NON_CONSTANT_LIST_ELEMENT',
"The values in a const list literal must be constants.",
correction: "Try removing the keyword 'const' from the list literal.",
hasPublishedDocs: true);
/**
* 12.6 Lists: It is a compile time error if an element of a constant list
* literal is not a compile-time constant.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode
NON_CONSTANT_LIST_ELEMENT_FROM_DEFERRED_LIBRARY = CompileTimeErrorCode(
'NON_CONSTANT_LIST_ELEMENT_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as values in "
"a 'const' list.",
correction:
"Try removing the keyword 'const' from the list literal.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an `if` element or a spread
// element in a constant map isn't a constant element.
//
// #### Examples
//
// The following code produces this diagnostic because it's attempting to
// spread a non-constant map:
//
// ```dart
// var notConst = <int, int>{};
// var map = const <int, int>{...[!notConst!]};
// ```
//
// Similarly, the following code produces this diagnostic because the
// condition in the `if` element isn't a constant expression:
//
// ```dart
// bool notConst = true;
// var map = const <int, int>{if ([!notConst!]) 1 : 2};
// ```
//
// #### Common fixes
//
// If the map needs to be a constant map, then make the elements constants.
// In the spread example, you might do that by making the collection being
// spread a constant:
//
// ```dart
// const notConst = <int, int>{};
// var map = const <int, int>{...notConst};
// ```
//
// If the map doesn't need to be a constant map, then remove the `const`
// keyword:
//
// ```dart
// bool notConst = true;
// var map = <int, int>{if (notConst) 1 : 2};
// ```
static const CompileTimeErrorCode NON_CONSTANT_MAP_ELEMENT =
CompileTimeErrorCode('NON_CONSTANT_MAP_ELEMENT',
"The elements in a const map literal must be constant.",
correction: "Try removing the keyword 'const' from the map literal.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a key in a constant map literal
// isn't a constant value.
//
// #### Examples
//
// The following code produces this diagnostic beause `a` isn't a constant:
//
// ```dart
// var a = 'a';
// var m = const {[!a!]: 0};
// ```
//
// #### Common fixes
//
// If the map needs to be a constant map, then make the key a constant:
//
// ```dart
// const a = 'a';
// var m = const {a: 0};
// ```
//
// If the map doesn't need to be a constant map, then remove the `const`
// keyword:
//
// ```dart
// var a = 'a';
// var m = {a: 0};
// ```
static const CompileTimeErrorCode NON_CONSTANT_MAP_KEY = CompileTimeErrorCode(
'NON_CONSTANT_MAP_KEY',
"The keys in a const map literal must be constant.",
correction: "Try removing the keyword 'const' from the map literal.",
hasPublishedDocs: true);
/**
* 12.7 Maps: It is a compile time error if either a key or a value of an
* entry in a constant map literal is not a compile-time constant.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode NON_CONSTANT_MAP_KEY_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'NON_CONSTANT_MAP_KEY_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as keys in a "
"const map literal.",
correction: "Try removing the keyword 'const' from the map literal.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a value in a constant map
// literal isn't a constant value.
//
// #### Examples
//
// The following code produces this diagnostic because `a` isn't a constant:
//
// ```dart
// var a = 'a';
// var m = const {0: [!a!]};
// ```
//
// #### Common fixes
//
// If the map needs to be a constant map, then make the key a constant:
//
// ```dart
// const a = 'a';
// var m = const {0: a};
// ```
//
// If the map doesn't need to be a constant map, then remove the `const`
// keyword:
//
// ```dart
// var a = 'a';
// var m = {0: a};
// ```
static const CompileTimeErrorCode NON_CONSTANT_MAP_VALUE =
CompileTimeErrorCode('NON_CONSTANT_MAP_VALUE',
"The values in a const map literal must be constant.",
correction: "Try removing the keyword 'const' from the map literal.",
hasPublishedDocs: true);
/**
* 12.7 Maps: It is a compile time error if either a key or a value of an
* entry in a constant map literal is not a compile-time constant.
*
* 12.1 Constants: A qualified reference to a static constant variable that is
* not qualified by a deferred prefix.
*/
static const CompileTimeErrorCode
NON_CONSTANT_MAP_VALUE_FROM_DEFERRED_LIBRARY = CompileTimeErrorCode(
'NON_CONSTANT_MAP_VALUE_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as values in "
"a const map literal.",
correction: "Try removing the keyword 'const' from the map literal.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a constant set literal contains
// an element that isn't a compile-time constant.
//
// #### Examples
//
// The following code produces this diagnostic because `i` isn't a constant:
//
// ```dart
// var i = 0;
//
// var s = const {[!i!]};
// ```
//
// #### Common fixes
//
// If the element can be changed to be a constant, then change it:
//
// ```dart
// const i = 0;
//
// var s = const {i};
// ```
//
// If the element can't be a constant, then remove the keyword `const`:
//
// ```dart
// var i = 0;
//
// var s = {i};
// ```
static const CompileTimeErrorCode NON_CONSTANT_SET_ELEMENT =
CompileTimeErrorCode('NON_CONSTANT_SET_ELEMENT',
"The values in a const set literal must be constants.",
correction: "Try removing the keyword 'const' from the set literal.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: Let <i>C</i> be the class in which the
* superinitializer appears and let <i>S</i> be the superclass of <i>C</i>.
* Let <i>k</i> be a generative constructor. It is a compile-time error if
* class <i>S</i> does not declare a generative constructor named <i>S</i>
* (respectively <i>S.id</i>)
*
* Parameters:
* 0: the non-generative constructor
*/
static const CompileTimeErrorCode NON_GENERATIVE_CONSTRUCTOR =
CompileTimeErrorCode(
'NON_GENERATIVE_CONSTRUCTOR',
"The constructor '{0}' is a factory constructor, but must be a "
"generative constructor to be a valid superinitializer.",
correction:
"Try calling a different constructor of the superclass, or "
"making the called constructor not be a factory constructor.");
/**
* An error code for when a class has no explicit constructor, and therefore
* a constructor is implicitly defined which uses a factory as a
* superinitializer. See [NON_GENERATIVE_CONSTRUCTOR].
*
* Parameters:
* 0: the name of the superclass
* 1: the name of the current class
* 2: the implicitly called factory constructor of the superclass
*/
static const CompileTimeErrorCode NON_GENERATIVE_IMPLICIT_CONSTRUCTOR =
CompileTimeErrorCode(
'NON_GENERATIVE_IMPLICIT_CONSTRUCTOR',
"The default constructor of superclass '{0}' (called by the implicit "
"default constructor of '{1}') must be a generative constructor, "
"but factory found.",
correction: "Try adding an explicit constructor that has a different "
"superinitializer or changing the superclass constructor '{2}' "
"to not be a factory constructor.");
static const CompileTimeErrorCode NON_SYNC_FACTORY = CompileTimeErrorCode(
'NON_SYNC_FACTORY',
"Factory bodies can't use 'async', 'async*', or 'sync*'.");
/**
* Parameters:
* 0: the name appearing where a type is expected
*/
// #### Description
//
// The analyzer produces this diagnostic when an identifier that isn't a type
// is used as a type argument.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is a variable, not
// a type:
//
// ```dart
// var x = 0;
// List<[!x!]> xList = [];
// ```
//
// #### Common fixes
//
// Change the type argument to be a type:
//
// ```dart
// var x = 0;
// List<int> xList = [];
// ```
static const CompileTimeErrorCode NON_TYPE_AS_TYPE_ARGUMENT =
CompileTimeErrorCode('NON_TYPE_AS_TYPE_ARGUMENT',
"The name '{0}' isn't a type so it can't be used as a type argument.",
correction: "Try correcting the name to an existing type, or "
"defining a type named '{0}'.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* Parameters:
* 0: the name of the non-type element
*/
// #### Description
//
// The analyzer produces this diagnostic when the identifier following the
// `on` in a `catch` clause is defined to be something other than a type.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is a function, not
// a type:
//
// ```dart
// void f() {
// try {
// // ...
// } on [!f!] {
// // ...
// }
// }
// ```
//
// #### Common fixes
//
// Change the name to the type of object that should be caught:
//
// ```dart
// void f() {
// try {
// // ...
// } on FormatException {
// // ...
// }
// }
// ```
static const CompileTimeErrorCode NON_TYPE_IN_CATCH_CLAUSE =
CompileTimeErrorCode(
'NON_TYPE_IN_CATCH_CLAUSE',
"The name '{0}' isn't a type and can't be used in an on-catch "
"clause.",
correction: "Try correcting the name to match an existing class.",
hasPublishedDocs: true);
/**
* 7.1.1 Operators: It is a static warning if the return type of the
* user-declared operator []= is explicitly declared and not void.
*/
static const CompileTimeErrorCode NON_VOID_RETURN_FOR_OPERATOR =
CompileTimeErrorCode('NON_VOID_RETURN_FOR_OPERATOR',
"The return type of the operator []= must be 'void'.",
correction: "Try changing the return type to 'void'.");
/**
* 7.3 Setters: It is a static warning if a setter declares a return type
* other than void.
*/
static const CompileTimeErrorCode NON_VOID_RETURN_FOR_SETTER =
CompileTimeErrorCode('NON_VOID_RETURN_FOR_SETTER',
"The return type of the setter must be 'void' or absent.",
correction: "Try removing the return type, or "
"define a method rather than a setter.");
/**
* Parameters:
* 0: the name that is not a type
*/
// #### Description
//
// The analyzer produces this diagnostic when a name is used as a type but
// declared to be something other than a type.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is a function:
//
// ```dart
// f() {}
// g([!f!] v) {}
// ```
//
// #### Common fixes
//
// Replace the name with the name of a type.
static const CompileTimeErrorCode NOT_A_TYPE = CompileTimeErrorCode(
'NOT_A_TYPE', "{0} isn't a type.",
correction: "Try correcting the name to match an existing type.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the variable that is invalid
*/
// #### Description
//
// The analyzer produces this diagnostic when a local variable is referenced
// and has all these characteristics:
// - Has a type that's [potentially non-nullable][].
// - Doesn't have an initializer.
// - Isn't marked as `late`.
// - The analyzer can't prove that the local variable will be assigned before
// the reference based on the specification of
// [definite assignment](https://github.com/dart-lang/language/blob/master/resources/type-system/flow-analysis.md).
//
// #### Example
//
// The following code produces this diagnostic because `x` can't have a value
// of `null`, but is referenced before a value was assigned to it:
//
// ```dart
// %experiments=non-nullable
// String f() {
// int x;
// return [!x!].toString();
// }
// ```
//
// The following code produces this diagnostic because the assignment to `x`
// might not be executed, so it might have a value of `null`:
//
// ```dart
// %experiments=non-nullable
// int g(bool b) {
// int x;
// if (b) {
// x = 1;
// }
// return [!x!] * 2;
// }
// ```
//
// The following code produces this diagnostic because the analyzer can't
// prove, based on definite assignment analysis, that `x` won't be referenced
// without having a value assigned to it:
//
// ```dart
// %experiments=non-nullable
// int h(bool b) {
// int x;
// if (b) {
// x = 1;
// }
// if (b) {
// return [!x!] * 2;
// }
// return 0;
// }
// ```
//
// #### Common fixes
//
// If `null` is a valid value, then make the variable nullable:
//
// ```dart
// %experiments=non-nullable
// String f() {
// int? x;
// return x!.toString();
// }
// ```
//
// If `null` isn’t a valid value, and there's a reasonable default value, then
// add an initializer:
//
// ```dart
// %experiments=non-nullable
// int g(bool b) {
// int x = 2;
// if (b) {
// x = 1;
// }
// return x * 2;
// }
// ```
//
// Otherwise, ensure that a value was assigned on every possible code path
// before the value is accessed:
//
// ```dart
// %experiments=non-nullable
// int g(bool b) {
// int x;
// if (b) {
// x = 1;
// } else {
// x = 2;
// }
// return x * 2;
// }
// ```
//
// You can also mark the variable as `late`, which removes the diagnostic, but
// if the variable isn't assigned a value before it's accessed, then it
// results in an exception being thrown at runtime. This approach should only
// be used if you're sure that the variable will always be assigned, even
// though the analyzer can't prove it based on definite assignment analysis.
//
// ```dart
// %experiments=non-nullable
// int h(bool b) {
// late int x;
// if (b) {
// x = 1;
// }
// if (b) {
// return x * 2;
// }
// return 0;
// }
// ```
static const CompileTimeErrorCode
NOT_ASSIGNED_POTENTIALLY_NON_NULLABLE_LOCAL_VARIABLE =
CompileTimeErrorCode(
'NOT_ASSIGNED_POTENTIALLY_NON_NULLABLE_LOCAL_VARIABLE',
"The non-nullable local variable '{0}' must be assigned before it "
"can be used.",
correction: "Try giving it an initializer expression, or ensure that "
"it's assigned on every execution path.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the expected number of required arguments
* 1: the actual number of positional arguments given
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function invocation
// has fewer positional arguments than the number of required positional
// parameters.
//
// #### Examples
//
// The following code produces this diagnostic because `f` declares two
// required parameters, but only one argument is provided:
//
// ```dart
// void f(int a, int b) {}
// void g() {
// f[!(0)!];
// }
// ```
//
// #### Common fixes
//
// Add arguments corresponding to the remaining parameters:
//
// ```dart
// void f(int a, int b) {}
// void g() {
// f(0, 1);
// }
// ```
static const CompileTimeErrorCode NOT_ENOUGH_POSITIONAL_ARGUMENTS =
CompileTimeErrorCode('NOT_ENOUGH_POSITIONAL_ARGUMENTS',
"{0} positional argument(s) expected, but {1} found.",
correction: "Try adding the missing arguments.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the field that is not initialized
*/
// #### Description
//
// The analyzer produces this diagnostic when a field is declared and has all
// these characteristics:
// - Has a type that's [potentially non-nullable][]
// - Doesn't have an initializer
// - Isn't marked as `late`
//
// #### Example
//
// The following code produces this diagnostic because `x` is implicitly
// initialized to `null` when it isn't allowed to be `null`:
//
// ```dart
// %experiments=non-nullable
// class C {
// int [!x!];
// }
// ```
//
// Similarly, the following code produces this diagnostic because `x` is
// implicitly initialized to `null`, when it isn't allowed to be `null`, by
// one of the constructors, even though it's initialized by other
// constructors:
//
// ```dart
// %experiments=non-nullable
// class C {
// int x;
//
// C(this.x);
//
// [!C!].n();
// }
// ```
//
// #### Common fixes
//
// If there's a reasonable default value for the field that’s the same for all
// instances, then add an initializer expression:
//
// ```dart
// %experiments=non-nullable
// class C {
// int x = 0;
// }
// ```
//
// If the value of the field should be provided when an instance is created,
// then add a constructor that sets the value of the field or update an
// existing constructor:
//
// ```dart
// %experiments=non-nullable
// class C {
// int x;
//
// C(this.x);
// }
// ```
//
// You can also mark the field as `late`, which removes the diagnostic, but if
// the field isn't assigned a value before it's accessed, then it results in
// an exception being thrown at runtime. This approach should only be used if
// you're sure that the field will always be assigned before it's referenced.
//
// ```dart
// %experiments=non-nullable
// class C {
// late int x;
// }
// ```
static const CompileTimeErrorCode
NOT_INITIALIZED_NON_NULLABLE_INSTANCE_FIELD = CompileTimeErrorCode(
'NOT_INITIALIZED_NON_NULLABLE_INSTANCE_FIELD',
"Non-nullable instance field '{0}' must be initialized.",
correction: "Try adding an initializer expression, "
"or a generative constructor that initializes it, "
"or mark it 'late'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the field that is not initialized
*/
static const CompileTimeErrorCode
NOT_INITIALIZED_NON_NULLABLE_INSTANCE_FIELD_CONSTRUCTOR =
CompileTimeErrorCodeWithUniqueName(
'NOT_INITIALIZED_NON_NULLABLE_INSTANCE_FIELD',
'NOT_INITIALIZED_NON_NULLABLE_INSTANCE_FIELD_CONSTRUCTOR',
"Non-nullable instance field '{0}' must be initialized.",
correction: "Try adding an initializer expression, "
"or add a field initializer in this constructor, "
"or mark it 'late'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the variable that is invalid
*/
// #### Description
//
// The analyzer produces this diagnostic when a static field or top-level
// variable has a type that's non-nullable and doesn't have an initializer.
// Fields and variables that don't have an initializer are normally
// initialized to `null`, but the type of the field or variable doesn't allow
// it to be set to `null`, so an explicit initializer must be provided.
//
// #### Example
//
// The following code produces this diagnostic because the field `f` can't be
// initialized to `null`:
//
// ```dart
// %experiments=non-nullable
// class C {
// static int [!f!];
// }
// ```
//
// Similarly, the following code produces this diagnostic because the
// top-level variable `v` can't be initialized to `null`:
//
// ```dart
// %experiments=non-nullable
// int [!v!];
// ```
//
// #### Common fixes
//
// If the field or variable can't be initialized to `null`, then add an
// initializer that sets it to a non-null value:
//
// ```dart
// %experiments=non-nullable
// class C {
// static int f = 0;
// }
// ```
//
// If the field or variable should be initialized to `null`, then change the
// type to be nullable:
//
// ```dart
// %experiments=non-nullable
// int? v;
// ```
//
// If the field or variable can't be initialized in the declaration but will
// always be initialized before it's referenced, then mark it as being `late`:
//
// ```dart
// %experiments=non-nullable
// class C {
// static late int f;
// }
// ```
static const CompileTimeErrorCode NOT_INITIALIZED_NON_NULLABLE_VARIABLE =
CompileTimeErrorCode('NOT_INITIALIZED_NON_NULLABLE_VARIABLE',
"The non-nullable variable '{0}' must be initialized.",
correction: "Try adding an initializer expression.",
hasPublishedDocs: true);
/**
* No parameters.
*/
static const CompileTimeErrorCode NOT_INSTANTIATED_BOUND =
CompileTimeErrorCode('NOT_INSTANTIATED_BOUND',
'Type parameter bound types must be instantiated.',
correction: 'Try adding type arguments to the type parameter bound.');
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the static type of the
// expression of a spread element that appears in either a list literal or a
// set literal doesn't implement the type `Iterable`.
//
// #### Examples
//
// The following code produces this diagnostic:
//
// ```dart
// var m = <String, int>{'a': 0, 'b': 1};
// var s = <String>{...[!m!]};
// ```
//
// #### Common fixes
//
// The most common fix is to replace the expression with one that produces an
// iterable object:
//
// ```dart
// var m = <String, int>{'a': 0, 'b': 1};
// var s = <String>{...m.keys};
// ```
static const CompileTimeErrorCode NOT_ITERABLE_SPREAD = CompileTimeErrorCode(
'NOT_ITERABLE_SPREAD',
"Spread elements in list or set literals must implement 'Iterable'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the static type of the
// expression of a spread element that appears in a map literal doesn't
// implement the type `Map`.
//
// #### Examples
//
// The following code produces this diagnostic because `l` isn't a `Map`:
//
// ```dart
// var l = <String>['a', 'b'];
// var m = <int, String>{...[!l!]};
// ```
//
// #### Common fixes
//
// The most common fix is to replace the expression with one that produces a
// map:
//
// ```dart
// var l = <String>['a', 'b'];
// var m = <int, String>{...l.asMap()};
// ```
static const CompileTimeErrorCode NOT_MAP_SPREAD = CompileTimeErrorCode(
'NOT_MAP_SPREAD', "Spread elements in map literals must implement 'Map'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
static const CompileTimeErrorCode NOT_NULL_AWARE_NULL_SPREAD =
CompileTimeErrorCode(
'NOT_NULL_AWARE_NULL_SPREAD',
"The Null typed expression can't be used with a non-null-aware "
"spread.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class declaration uses an
// `extends` clause to specify a superclass, and the superclass is followed by
// a `?`.
//
// It isn't valid to specify a nullable superclass because doing so would have
// no meaning; it wouldn't change either the interface or implementation being
// inherited by the class containing the `extends` clause.
//
// Note, however, that it _is_ valid to use a nullable type as a type argument
// to the superclass, such as `class A extends B<C?> {}`.
//
// #### Example
//
// The following code produces this diagnostic because `A?` is a nullable
// type, and nullable types can't be used in an `extends` clause:
//
// ```dart
// %experiments=non-nullable
// class A {}
// class B extends [!A?!] {}
// ```
//
// #### Common fixes
//
// Remove the question mark from the type:
//
// ```dart
// %experiments=non-nullable
// class A {}
// class B extends A {}
// ```
static const CompileTimeErrorCode NULLABLE_TYPE_IN_EXTENDS_CLAUSE =
CompileTimeErrorCode('NULLABLE_TYPE_IN_EXTENDS_CLAUSE',
"A class can't extend a nullable type.",
correction: "Try removing the question mark.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class or mixin declaration has
// an `implements` clause, and an interface is followed by a `?`.
//
// It isn't valid to specify a nullable interface because doing so would have
// no meaning; it wouldn't change the interface being inherited by the class
// containing the `implements` clause.
//
// Note, however, that it _is_ valid to use a nullable type as a type argument
// to the interface, such as `class A implements B<C?> {}`.
//
//
// #### Example
//
// The following code produces this diagnostic because `A?` is a nullable
// type, and nullable types can't be used in an `implements` clause:
//
// ```dart
// %experiments=non-nullable
// class A {}
// class B implements [!A?!] {}
// ```
//
// #### Common fixes
//
// Remove the question mark from the type:
//
// ```dart
// %experiments=non-nullable
// class A {}
// class B implements A {}
// ```
static const CompileTimeErrorCode NULLABLE_TYPE_IN_IMPLEMENTS_CLAUSE =
CompileTimeErrorCode('NULLABLE_TYPE_IN_IMPLEMENTS_CLAUSE',
"A class or mixin can't implement a nullable type.",
correction: "Try removing the question mark.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a mixin declaration uses an `on`
// clause to specify a superclass constraint, and the class that's specified
// is followed by a `?`.
//
// It isn't valid to specify a nullable superclass constraint because doing so
// would have no meaning; it wouldn't change the interface being depended on
// by the mixin containing the `on` clause.
//
// Note, however, that it _is_ valid to use a nullable type as a type argument
// to the superclass constraint, such as `mixin A on B<C?> {}`.
//
//
// #### Example
//
// The following code produces this diagnostic because `A?` is a nullable type
// and nullable types can't be used in an `on` clause:
//
// ```dart
// %experiments=non-nullable
// class C {}
// mixin M on [!C?!] {}
// ```
//
// #### Common fixes
//
// Remove the question mark from the type:
//
// ```dart
// %experiments=non-nullable
// class C {}
// mixin M on C {}
// ```
static const CompileTimeErrorCode NULLABLE_TYPE_IN_ON_CLAUSE =
CompileTimeErrorCode('NULLABLE_TYPE_IN_ON_CLAUSE',
"A mixin can't have a nullable type as a superclass constraint.",
correction: "Try removing the question mark.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a class or mixin declaration has
// a `with` clause, and a mixin is followed by a `?`.
//
// It isn't valid to specify a nullable mixin because doing so would have no
// meaning; it wouldn't change either the interface or implementation being
// inherited by the class containing the `with` clause.
//
// Note, however, that it _is_ valid to use a nullable type as a type argument
// to the mixin, such as `class A with B<C?> {}`.
//
// #### Example
//
// The following code produces this diagnostic because `A?` is a nullable
// type, and nullable types can't be used in a `with` clause:
//
// ```dart
// %experiments=non-nullable
// mixin M {}
// class C with [!M?!] {}
// ```
//
// #### Common fixes
//
// Remove the question mark from the type:
//
// ```dart
// %experiments=non-nullable
// mixin M {}
// class C with M {}
// ```
static const CompileTimeErrorCode NULLABLE_TYPE_IN_WITH_CLAUSE =
CompileTimeErrorCode('NULLABLE_TYPE_IN_WITH_CLAUSE',
"A class or mixin can't mix in a nullable type.",
correction: "Try removing the question mark.",
hasPublishedDocs: true);
/**
* 7.9 Superclasses: It is a compile-time error to specify an extends clause
* for class Object.
*/
static const CompileTimeErrorCode OBJECT_CANNOT_EXTEND_ANOTHER_CLASS =
CompileTimeErrorCode('OBJECT_CANNOT_EXTEND_ANOTHER_CLASS',
"The class 'Object' can't extend any other class.");
/**
* 10.10 Superinterfaces: It is a compile-time error if two elements in the
* type list of the implements clause of a class `C` specifies the same
* type `T`.
*
* Parameters:
* 0: the name of the interface that is implemented more than once
*/
static const CompileTimeErrorCode ON_REPEATED = CompileTimeErrorCode(
'ON_REPEATED',
"'{0}' can only be used in super-class constraints only once.",
correction: "Try removing all but one occurrence of the class name.");
/**
* 7.1.1 Operators: It is a compile-time error to declare an optional
* parameter in an operator.
*/
static const CompileTimeErrorCode OPTIONAL_PARAMETER_IN_OPERATOR =
CompileTimeErrorCode('OPTIONAL_PARAMETER_IN_OPERATOR',
"Optional parameters aren't allowed when defining an operator.",
correction: "Try removing the optional parameters.");
/**
* Parameters:
* 0: the name of expected library name
* 1: the non-matching actual library name from the "part of" declaration
*/
// #### Description
//
// The analyzer produces this diagnostic when a library attempts to include a
// file as a part of itself when the other file is a part of a different
// library.
//
// #### Example
//
// Given a file named `part.dart` containing
//
// ```dart
// %uri="package:a/part.dart"
// part of 'library.dart';
// ```
//
// The following code, in any file other than `library.dart`, produces this
// diagnostic because it attempts to include `part.dart` as a part of itself
// when `part.dart` is a part of a different library:
//
// ```dart
// part [!'package:a/part.dart'!];
// ```
//
// #### Common fixes
//
// If the library should be using a different file as a part, then change the
// URI in the part directive to be the URI of the other file.
//
// If the part file should be a part of this library, then update the URI (or
// library name) in the part-of directive to be the URI (or name) of the
// correct library.
static const CompileTimeErrorCode PART_OF_DIFFERENT_LIBRARY =
CompileTimeErrorCode('PART_OF_DIFFERENT_LIBRARY',
"Expected this library to be part of '{0}', not '{1}'.",
correction: "Try including a different part, or changing the name of "
"the library in the part's part-of directive.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the uri pointing to a non-library declaration
*/
// #### Description
//
// The analyzer produces this diagnostic when a part directive is found and
// the referenced file doesn't have a part-of directive.
//
// #### Examples
//
// Given a file (`a.dart`) containing:
//
// ```dart
// %uri="lib/a.dart"
// class A {}
// ```
//
// The following code produces this diagnostic because `a.dart` doesn't
// contain a part-of directive:
//
// ```dart
// part [!'a.dart'!];
// ```
//
// #### Common fixes
//
// If the referenced file is intended to be a part of another library, then
// add a part-of directive to the file:
//
// ```dart
// part of 'test.dart';
//
// class A {}
// ```
//
// If the referenced file is intended to be a library, then replace the part
// directive with an import directive:
//
// ```dart
// import 'a.dart';
// ```
static const CompileTimeErrorCode PART_OF_NON_PART = CompileTimeErrorCode(
'PART_OF_NON_PART',
"The included part '{0}' must have a part-of directive.",
correction: "Try adding a part-of directive to '{0}'.",
hasPublishedDocs: true);
/**
* Parts: It is a static warning if the referenced part declaration <i>p</i>
* names a library that does not have a library tag.
*
* Parameters:
* 0: the URI of the expected library
* 1: the non-matching actual library name from the "part of" declaration
*/
static const CompileTimeErrorCode PART_OF_UNNAMED_LIBRARY =
CompileTimeErrorCode(
'PART_OF_UNNAMED_LIBRARY',
"Library is unnamed. Expected a URI not a library name '{0}' in the "
"part-of directive.",
correction:
"Try changing the part-of directive to a URI, or try including a "
"different part.");
/**
* Parameters:
* 0: The name of the prefix
*/
// #### Description
//
// The analyzer produces this diagnostic when a name is used as both an import
// prefix and the name of a top-level declaration in the same library.
//
// #### Example
//
// The following code produces this diagnostic because `f` is used as both an
// import prefix and the name of a function:
//
// ```dart
// import 'dart:math' as f;
//
// int [!f!]() => f.min(0, 1);
// ```
//
// #### Common fixes
//
// If you want to use the name for the import prefix, then rename the
// top-level declaration:
//
// ```dart
// import 'dart:math' as f;
//
// int g() => f.min(0, 1);
// ```
//
// If you want to use the name for the top-level declaration, then rename the
// import prefix:
//
// ```dart
// import 'dart:math' as math;
//
// int f() => math.min(0, 1);
// ```
static const CompileTimeErrorCode PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER =
CompileTimeErrorCode(
'PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER',
"The name '{0}' is already used as an import prefix and can't be "
"used to name a top-level element.",
correction:
"Try renaming either the top-level element or the prefix.");
/**
* Parameters:
* 0: The name of the prefix
*/
// #### Description
//
// The analyzer produces this diagnostic when an import prefix is used by
// itself, without accessing any of the names declared in the libraries
// associated with the prefix. Prefixes aren't variables, and therefore can't
// be used as a value.
//
// #### Example
//
// The following code produces this diagnostic because the prefix `math` is
// being used as if it were a variable:
//
// ```dart
// import 'dart:math' as math;
//
// void f() {
// print([!math!]);
// }
// ```
//
// #### Common fixes
//
// If the code is incomplete, then reference something in one of the libraries
// associated with the prefix:
//
// ```dart
// import 'dart:math' as math;
//
// void f() {
// print(math.pi);
// }
// ```
//
// If the name is wrong, then correct the name.
static const CompileTimeErrorCode PREFIX_IDENTIFIER_NOT_FOLLOWED_BY_DOT =
CompileTimeErrorCode(
'PREFIX_IDENTIFIER_NOT_FOLLOWED_BY_DOT',
"The name '{0}' refers to an import prefix, so it must be followed "
"by '.'.",
correction:
"Try correcting the name to refer to something other than a "
"prefix, or renaming the prefix.",
hasPublishedDocs: true);
/**
* From the `Static Types` section of the spec:
*
* A type T is malformed if:
* - T has the form id or the form prefix.id, and in the enclosing lexical
* scope, the name id (respectively prefix.id) does not denote a type.
*
* In particular, this means that if an import prefix is shadowed by a local
* declaration, it is an error to try to use it as a prefix for a type name.
*/
static const CompileTimeErrorCode PREFIX_SHADOWED_BY_LOCAL_DECLARATION =
CompileTimeErrorCode(
'PREFIX_SHADOWED_BY_LOCAL_DECLARATION',
"The prefix '{0}' can't be used here because it is shadowed by a "
"local declaration.",
correction:
"Try renaming either the prefix or the local declaration.");
/**
* It is an error for a mixin to add a private name that conflicts with a
* private name added by a superclass or another mixin.
*/
static const CompileTimeErrorCode PRIVATE_COLLISION_IN_MIXIN_APPLICATION =
CompileTimeErrorCode(
'PRIVATE_COLLISION_IN_MIXIN_APPLICATION',
"The private name '{0}', defined by '{1}', "
"conflicts with the same name defined by '{2}'.",
correction: "Try removing '{1}' from the 'with' clause.");
/**
* 6.2.2 Optional Formals: It is a compile-time error if the name of a named
* optional parameter begins with an '_' character.
*/
static const CompileTimeErrorCode PRIVATE_OPTIONAL_PARAMETER =
CompileTimeErrorCode('PRIVATE_OPTIONAL_PARAMETER',
"Named optional parameters can't start with an underscore.");
static const CompileTimeErrorCode PRIVATE_SETTER = CompileTimeErrorCode(
'PRIVATE_SETTER',
"The setter '{0}' is private and can't be accessed outside of the "
"library that declares it.",
correction: "Try making it public.");
static const CompileTimeErrorCode READ_POTENTIALLY_UNASSIGNED_FINAL =
CompileTimeErrorCode(
'READ_POTENTIALLY_UNASSIGNED_FINAL',
"The final variable '{0}' can't be read because it is potentially "
"unassigned at this point.",
correction: "Ensure that it is assigned on necessary execution paths.",
);
/**
* 12.1 Constants: It is a compile-time error if the value of a compile-time
* constant expression depends on itself.
*/
static const CompileTimeErrorCode RECURSIVE_COMPILE_TIME_CONSTANT =
CompileTimeErrorCode('RECURSIVE_COMPILE_TIME_CONSTANT',
"Compile-time constant expression depends on itself.");
/**
* 7.6.1 Generative Constructors: A generative constructor may be redirecting,
* in which case its only action is to invoke another generative constructor.
*
* TODO(scheglov) review this later, there are no explicit "it is a
* compile-time error" in specification. But it was added to the co19 and
* there is same error for factories.
*
* https://code.google.com/p/dart/issues/detail?id=954
*/
static const CompileTimeErrorCode RECURSIVE_CONSTRUCTOR_REDIRECT =
CompileTimeErrorCode('RECURSIVE_CONSTRUCTOR_REDIRECT',
"Cycle in redirecting generative constructors.");
/**
* 7.6.2 Factories: It is a compile-time error if a redirecting factory
* constructor redirects to itself, either directly or indirectly via a
* sequence of redirections.
*/
static const CompileTimeErrorCode RECURSIVE_FACTORY_REDIRECT =
CompileTimeErrorCode('RECURSIVE_FACTORY_REDIRECT',
"Cycle in redirecting factory constructors.");
/**
* 7.10 Superinterfaces: It is a compile-time error if the interface of a
* class <i>C</i> is a superinterface of itself.
*
* 8.1 Superinterfaces: It is a compile-time error if an interface is a
* superinterface of itself.
*
* 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a
* superclass of itself.
*
* Parameters:
* 0: the name of the class that implements itself recursively
* 1: a string representation of the implements loop
*/
static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE =
CompileTimeErrorCode('RECURSIVE_INTERFACE_INHERITANCE',
"'{0}' can't be a superinterface of itself: {1}.");
/**
* 7.10 Superinterfaces: It is a compile-time error if the interface of a
* class <i>C</i> is a superinterface of itself.
*
* 8.1 Superinterfaces: It is a compile-time error if an interface is a
* superinterface of itself.
*
* 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a
* superclass of itself.
*
* Parameters:
* 0: the name of the class that implements itself recursively
*/
static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_EXTENDS =
CompileTimeErrorCode('RECURSIVE_INTERFACE_INHERITANCE_EXTENDS',
"'{0}' can't extend itself.");
/**
* 7.10 Superinterfaces: It is a compile-time error if the interface of a
* class <i>C</i> is a superinterface of itself.
*
* 8.1 Superinterfaces: It is a compile-time error if an interface is a
* superinterface of itself.
*
* 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a
* superclass of itself.
*
* Parameters:
* 0: the name of the class that implements itself recursively
*/
static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_IMPLEMENTS =
CompileTimeErrorCode('RECURSIVE_INTERFACE_INHERITANCE_IMPLEMENTS',
"'{0}' can't implement itself.");
/**
* Parameters:
* 0: the name of the mixin that constraints itself recursively
*/
static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_ON =
CompileTimeErrorCode('RECURSIVE_INTERFACE_INHERITANCE_ON',
"'{0}' can't use itself as a superclass constraint.");
/**
* 7.10 Superinterfaces: It is a compile-time error if the interface of a
* class <i>C</i> is a superinterface of itself.
*
* 8.1 Superinterfaces: It is a compile-time error if an interface is a
* superinterface of itself.
*
* 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a
* superclass of itself.
*
* Parameters:
* 0: the name of the class that implements itself recursively
*/
static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_WITH =
CompileTimeErrorCode('RECURSIVE_INTERFACE_INHERITANCE_WITH',
"'{0}' can't use itself as a mixin.");
/**
* 7.6.1 Generative constructors: A generative constructor may be
* <i>redirecting</i>, in which case its only action is to invoke another
* generative constructor.
*/
static const CompileTimeErrorCode REDIRECT_GENERATIVE_TO_MISSING_CONSTRUCTOR =
CompileTimeErrorCode('REDIRECT_GENERATIVE_TO_MISSING_CONSTRUCTOR',
"The constructor '{0}' couldn't be found in '{1}'.",
correction: "Try redirecting to a different constructor, or "
"defining the constructor named '{0}'.");
/**
* 7.6.1 Generative constructors: A generative constructor may be
* <i>redirecting</i>, in which case its only action is to invoke another
* generative constructor.
*/
static const CompileTimeErrorCode
REDIRECT_GENERATIVE_TO_NON_GENERATIVE_CONSTRUCTOR = CompileTimeErrorCode(
'REDIRECT_GENERATIVE_TO_NON_GENERATIVE_CONSTRUCTOR',
"Generative constructor can't redirect to a factory constructor.",
correction: "Try redirecting to a different constructor.");
/**
* A factory constructor can't redirect to a non-generative constructor of an
* abstract class.
*/
static const CompileTimeErrorCode REDIRECT_TO_ABSTRACT_CLASS_CONSTRUCTOR =
CompileTimeErrorCode(
'REDIRECT_TO_ABSTRACT_CLASS_CONSTRUCTOR',
"The redirecting constructor '{0}' can't redirect to a constructor "
"of the abstract class '{1}'.",
correction: "Try redirecting to a constructor of a different class.");
/**
* Parameters:
* 0: the name of the redirected constructor
* 1: the name of the redirecting constructor
*/
// #### Description
//
// The analyzer produces this diagnostic when a factory constructor attempts
// to redirect to another constructor, but the two have incompatible
// parameters. The parameters are compatible if all of the parameters of the
// redirecting constructor can be passed to the other constructor and if the
// other constructor doesn't require any parameters that aren't declared by
// the redirecting constructor.
//
// #### Examples
//
// The following code produces this diagnostic because the constructor for `A`
// doesn't declare a parameter that the constructor for `B` requires:
//
// ```dart
// abstract class A {
// factory A() = [!B!];
// }
//
// class B implements A {
// B(int x);
// B.zero();
// }
// ```
//
// The following code produces this diagnostic because the constructor for `A`
// declares a named parameter (`y`) that the constructor for `B` doesn't
// allow:
//
// ```dart
// abstract class A {
// factory A(int x, {int y}) = [!B!];
// }
//
// class B implements A {
// B(int x);
// }
// ```
//
// #### Common fixes
//
// If there's a different constructor that is compatible with the redirecting
// constructor, then redirect to that constructor:
//
// ```dart
// abstract class A {
// factory A() = B.zero;
// }
//
// class B implements A {
// B(int x);
// B.zero();
// }
// ```
//
// Otherwise, update the redirecting constructor to be compatible:
//
// ```dart
// abstract class A {
// factory A(int x) = B;
// }
//
// class B implements A {
// B(int x);
// }
// ```
static const CompileTimeErrorCode REDIRECT_TO_INVALID_FUNCTION_TYPE =
CompileTimeErrorCode(
'REDIRECT_TO_INVALID_FUNCTION_TYPE',
"The redirected constructor '{0}' has incompatible parameters with "
"'{1}'.",
correction: "Try redirecting to a different constructor.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the redirected constructor's return type
* 1: the name of the redirecting constructor's return type
*/
// #### Description
//
// The analyzer produces this diagnostic when a factory constructor redirects
// to a constructor whose return type isn't a subtype of the type that the
// factory constructor is declared to produce.
//
// #### Examples
//
// The following code produces this diagnostic because `A` isn't a subclass
// of `C`, which means that the value returned by the constructor `A()`
// couldn't be returned from the constructor `C()`:
//
// ```dart
// class A {}
//
// class B implements C {}
//
// class C {
// factory C() = [!A!];
// }
// ```
//
// #### Common fixes
//
// If the factory constructor is redirecting to a constructor in the wrong
// class, then update the factory constructor to redirect to the correct
// constructor:
//
// ```dart
// class A {}
//
// class B implements C {}
//
// class C {
// factory C() = B;
// }
// ```
//
// If the class defining the constructor being redirected to is the class that
// should be returned, then make it a subtype of the factory's return type:
//
// ```dart
// class A implements C {}
//
// class B implements C {}
//
// class C {
// factory C() = A;
// }
// ```
static const CompileTimeErrorCode REDIRECT_TO_INVALID_RETURN_TYPE =
CompileTimeErrorCode(
'REDIRECT_TO_INVALID_RETURN_TYPE',
"The return type '{0}' of the redirected constructor isn't "
"a subtype of '{1}'.",
correction: "Try redirecting to a different constructor.",
hasPublishedDocs: true);
/**
* 7.6.2 Factories: It is a compile-time error if <i>k</i> is prefixed with
* the const modifier but <i>k'</i> is not a constant constructor.
*/
static const CompileTimeErrorCode REDIRECT_TO_MISSING_CONSTRUCTOR =
CompileTimeErrorCode('REDIRECT_TO_MISSING_CONSTRUCTOR',
"The constructor '{0}' couldn't be found in '{1}'.",
correction: "Try redirecting to a different constructor, or "
"define the constructor named '{0}'.");
/**
* Parameters:
* 0: the name of the non-type referenced in the redirect
*/
// #### Description
//
// One way to implement a factory constructor is to redirect to another
// constructor by referencing the name of the constructor. The analyzer
// produces this diagnostic when the redirect is to something other than a
// constructor.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is a function:
//
// ```dart
// C f() => throw 0;
//
// class C {
// factory C() = [!f!];
// }
// ```
//
// #### Common fixes
//
// If the constructor isn't defined, then either define it or replace it with
// a constructor that is defined.
//
// If the constructor is defined but the class that defines it isn't visible,
// then you probably need to add an import.
//
// If you're trying to return the value returned by a function, then rewrite
// the constructor to return the value from the constructor's body:
//
// ```dart
// C f() => throw 0;
//
// class C {
// factory C() => f();
// }
// ```
static const CompileTimeErrorCode REDIRECT_TO_NON_CLASS =
CompileTimeErrorCode(
'REDIRECT_TO_NON_CLASS',
"The name '{0}' isn't a type and can't be used in a redirected "
"constructor.",
correction: "Try redirecting to a different constructor.",
hasPublishedDocs: true);
/**
* 7.6.2 Factories: It is a compile-time error if <i>k</i> is prefixed with
* the const modifier but <i>k'</i> is not a constant constructor.
*/
static const CompileTimeErrorCode REDIRECT_TO_NON_CONST_CONSTRUCTOR =
CompileTimeErrorCode(
'REDIRECT_TO_NON_CONST_CONSTRUCTOR',
"Constant redirecting constructor can't redirect to a non-constant "
"constructor.",
correction: "Try redirecting to a different constructor.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a variable is referenced before
// it’s declared. In Dart, variables are visible everywhere in the block in
// which they are declared, but can only be referenced after they are
// declared.
//
// The analyzer also produces a context message that indicates where the
// declaration is located.
//
// #### Examples
//
// The following code produces this diagnostic because `i` is used before it
// is declared:
//
// ```dart
// void f() {
// print([!i!]);
// int i = 5;
// }
// ```
//
// #### Common fixes
//
// If you intended to reference the local variable, move the declaration
// before the first reference:
//
// ```dart
// void f() {
// int i = 5;
// print(i);
// }
// ```
//
// If you intended to reference a name from an outer scope, such as a
// parameter, instance field or top-level variable, then rename the local
// declaration so that it doesn't hide the outer variable.
//
// ```dart
// void f(int i) {
// print(i);
// int x = 5;
// print(x);
// }
// ```
static const CompileTimeErrorCode REFERENCED_BEFORE_DECLARATION =
CompileTimeErrorCode('REFERENCED_BEFORE_DECLARATION',
"Local variable '{0}' can't be referenced before it is declared.",
correction: "Try moving the declaration to before the first use, or "
"renaming the local variable so that it doesn't hide a name from "
"an enclosing scope.",
hasPublishedDocs: true);
/**
* 12.8.1 Rethrow: It is a compile-time error if an expression of the form
* <i>rethrow;</i> is not enclosed within a on-catch clause.
*/
static const CompileTimeErrorCode RETHROW_OUTSIDE_CATCH =
CompileTimeErrorCode(
'RETHROW_OUTSIDE_CATCH', "Rethrow must be inside of catch clause.",
correction:
"Try moving the expression into a catch clause, or using a "
"'throw' expression.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a generative constructor
// contains a `return` statement that specifies a value to be returned.
// Generative constructors always return the object that was created, and
// therefore can't return a different object.
//
// #### Example
//
// The following code produces this diagnostic because the `return` statement
// has an expression:
//
// ```dart
// class C {
// C() {
// return [!this!];
// }
// }
// ```
//
// #### Common fixes
//
// If the constructor should create a new instance, then remove either the
// `return` statement or the expression:
//
// ```dart
// class C {
// C();
// }
// ```
//
// If the constructor shouldn't create a new instance, then convert it to be a
// factory constructor:
//
// ```dart
// class C {
// factory C() {
// return _instance;
// }
//
// static C _instance = C._();
//
// C._();
// }
// ```
static const CompileTimeErrorCode RETURN_IN_GENERATIVE_CONSTRUCTOR =
CompileTimeErrorCode('RETURN_IN_GENERATIVE_CONSTRUCTOR',
"Constructors can't return values.",
correction: "Try removing the return statement or using a factory "
"constructor.",
hasPublishedDocs: true);
/**
* 13.12 Return: It is a compile-time error if a return statement of the form
* <i>return e;</i> appears in a generator function.
*/
static const CompileTimeErrorCode RETURN_IN_GENERATOR = CompileTimeErrorCode(
'RETURN_IN_GENERATOR',
"Can't return a value from a generator function (using the '{0}' "
"modifier).",
correction: "Try removing the value, replacing 'return' with 'yield' or "
"changing the method body modifier.");
/**
* Parameters:
* 0: the return type as declared in the return statement
* 1: the expected return type as defined by the method
*/
// #### Description
//
// The analyzer produces this diagnostic when the static type of a returned
// expression isn't assignable to the return type that the closure is required
// to have.
//
// #### Examples
//
// The following code produces this diagnostic because `f` is defined to be a
// function that returns a `String`, but the closure assigned to it returns an
// `int`:
//
// ```dart
// String Function(String) f = (s) => [!3!];
// ```
//
// #### Common fixes
//
// If the return type is correct, then replace the returned value with a value
// of the correct type, possibly by converting the existing value:
//
// ```dart
// String Function(String) f = (s) => 3.toString();
// ```
static const CompileTimeErrorCode RETURN_OF_INVALID_TYPE_FROM_CLOSURE =
CompileTimeErrorCode(
'RETURN_OF_INVALID_TYPE_FROM_CLOSURE',
"The return type '{0}' isn't a '{1}', as required by the closure's "
"context.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the return type as declared in the return statement
* 1: the expected return type as defined by the enclosing class
* 2: the name of the constructor
*/
static const CompileTimeErrorCode RETURN_OF_INVALID_TYPE_FROM_CONSTRUCTOR =
CompileTimeErrorCodeWithUniqueName(
'RETURN_OF_INVALID_TYPE',
'RETURN_OF_INVALID_TYPE_FROM_CONSTRUCTOR',
"A value of type '{0}' can't be returned from constructor '{2}' "
"because it has a return type of '{1}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the return type as declared in the return statement
* 1: the expected return type as defined by the method
* 2: the name of the method
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function returns a
// value whose type isn't assignable to the declared return type.
//
// #### Examples
//
// The following code produces this diagnostic because `f` has a return type
// of `String` but is returning an `int`:
//
// ```dart
// String f() => [!3!];
// ```
//
// #### Common fixes
//
// If the return type is correct, then replace the value being returned with a
// value of the correct type, possibly by converting the existing value:
//
// ```dart
// String f() => 3.toString();
// ```
//
// If the value is correct, then change the return type to match:
//
// ```dart
// int f() => 3;
// ```
static const CompileTimeErrorCode RETURN_OF_INVALID_TYPE_FROM_FUNCTION =
CompileTimeErrorCodeWithUniqueName(
'RETURN_OF_INVALID_TYPE',
'RETURN_OF_INVALID_TYPE_FROM_FUNCTION',
"A value of type '{0}' can't be returned from function '{2}' because "
"it has a return type of '{1}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the return type as declared in the return statement
* 1: the expected return type as defined by the method
* 2: the name of the method
*/
static const CompileTimeErrorCode RETURN_OF_INVALID_TYPE_FROM_METHOD =
CompileTimeErrorCodeWithUniqueName(
'RETURN_OF_INVALID_TYPE',
'RETURN_OF_INVALID_TYPE_FROM_METHOD',
"A value of type '{0}' can't be returned from method '{2}' because "
"it has a return type of '{1}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds a `return` statement
// without an expression in a function that declares a return type.
//
// #### Examples
//
// The following code produces this diagnostic because the function `f` is
// expected to return an `int`, but no value is being returned:
//
// ```dart
// int f() {
// [!return!];
// }
// ```
//
// #### Common fixes
//
// Add an expression that computes the value to be returned:
//
// ```dart
// int f() {
// return 0;
// }
// ```
static const CompileTimeErrorCode RETURN_WITHOUT_VALUE = CompileTimeErrorCode(
'RETURN_WITHOUT_VALUE', "The return value is missing after 'return'.",
hasPublishedDocs: true);
static const CompileTimeErrorCode SET_ELEMENT_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'SET_ELEMENT_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be used as values in "
"a const set.",
correction: "Try making the deferred import non-deferred.");
/**
* Parameters:
* 0: the actual type of the set element
* 1: the expected type of the set element
*/
static const CompileTimeErrorCode SET_ELEMENT_TYPE_NOT_ASSIGNABLE =
CompileTimeErrorCode('SET_ELEMENT_TYPE_NOT_ASSIGNABLE',
"The element type '{0}' can't be assigned to the set type '{1}'.");
/**
* 14.1 Imports: It is a compile-time error if a prefix used in a deferred
* import is used in another import clause.
*/
static const CompileTimeErrorCode SHARED_DEFERRED_PREFIX =
CompileTimeErrorCode(
'SHARED_DEFERRED_PREFIX',
"The prefix of a deferred import can't be used in other import "
"directives.",
correction: "Try renaming one of the prefixes.");
static const CompileTimeErrorCode SPREAD_EXPRESSION_FROM_DEFERRED_LIBRARY =
CompileTimeErrorCode(
'SPREAD_EXPRESSION_FROM_DEFERRED_LIBRARY',
"Constant values from a deferred library can't be spread into a "
"const literal.",
correction: "Try making the deferred import non-deferred.");
/**
* Parameters:
* 0: the name of the instance member
*/
// #### Description
//
// The analyzer produces this diagnostic when a class name is used to access
// an instance field. Instance fields don't exist on a class; they exist only
// on an instance of the class.
//
// #### Examples
//
// The following code produces this diagnostic because `x` is an instance
// field:
//
// ```dart
// class C {
// static int a;
//
// int b;
// }
//
// int f() => C.[!b!];
// ```
//
// #### Common fixes
//
// If you intend to access a static field, then change the name of the field
// to an existing static field:
//
// ```dart
// class C {
// static int a;
//
// int b;
// }
//
// int f() => C.a;
// ```
//
// If you intend to access the instance field, then use an instance of the
// class to access the field:
//
// ```dart
// class C {
// static int a;
//
// int b;
// }
//
// int f(C c) => c.b;
// ```
static const CompileTimeErrorCode STATIC_ACCESS_TO_INSTANCE_MEMBER =
CompileTimeErrorCode('STATIC_ACCESS_TO_INSTANCE_MEMBER',
"Instance member '{0}' can't be accessed using static access.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a member declared inside an
// extension uses the `super` keyword . Extensions aren't classes and don't
// have superclasses, so the `super` keyword serves no purpose.
//
// #### Examples
//
// The following code produces this diagnostic because `super` can't be used
// in an extension:
//
// ```dart
// extension E on Object {
// String get displayString => [!super!].toString();
// }
// ```
//
// #### Common fixes
//
// Remove the `super` keyword :
//
// ```dart
// extension E on Object {
// String get displayString => toString();
// }
// ```
static const CompileTimeErrorCode SUPER_IN_EXTENSION = CompileTimeErrorCode(
'SUPER_IN_EXTENSION',
"The 'super' keyword can't be used in an extension because an "
"extension doesn't have a superclass.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the keyword `super` is used
// outside of a instance method.
//
// #### Examples
//
// The following code produces this diagnostic because `super` is used in a
// top-level function:
//
// ```dart
// void f() {
// [!super!].f();
// }
// ```
//
// #### Common fixes
//
// Rewrite the code to not use `super`.
static const CompileTimeErrorCode SUPER_IN_INVALID_CONTEXT =
CompileTimeErrorCode(
'SUPER_IN_INVALID_CONTEXT', "Invalid context for 'super' invocation.",
hasPublishedDocs: true);
/**
* 7.6.1 Generative Constructors: A generative constructor may be redirecting,
* in which case its only action is to invoke another generative constructor.
*/
static const CompileTimeErrorCode SUPER_IN_REDIRECTING_CONSTRUCTOR =
CompileTimeErrorCode('SUPER_IN_REDIRECTING_CONSTRUCTOR',
"The redirecting constructor can't have a 'super' initializer.");
/**
* 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It
* is a compile-time error if a generative constructor of class Object
* includes a superinitializer.
*/
static const CompileTimeErrorCode SUPER_INITIALIZER_IN_OBJECT =
CompileTimeErrorCode('SUPER_INITIALIZER_IN_OBJECT',
"The class 'Object' can't invoke a constructor from a superclass.");
/**
* It is an error if any case of a switch statement except the last case (the
* default case if present) may complete normally. The previous syntactic
* restriction requiring the last statement of each case to be one of an
* enumerated list of statements (break, continue, return, throw, or rethrow)
* is removed.
*/
static const CompileTimeErrorCode SWITCH_CASE_COMPLETES_NORMALLY =
CompileTimeErrorCode('SWITCH_CASE_COMPLETES_NORMALLY',
"The 'case' should not complete normally.",
correction: "Try adding 'break', or 'return', etc.");
/**
* Parameters:
* 0: The static type of the switch expression
* 1: The static type of the case expressions
*/
// #### Description
//
// The analyzer produces this diagnostic when the type of the expression in a
// `switch` statement isn't assignable to the type of the expressions in the
// `case` clauses.
//
// #### Example
//
// The following code produces this diagnostic because the type of `s`
// (`String`) isn't assignable to the type of `0` (`int`):
//
// ```dart
// void f(String s) {
// switch ([!s!]) {
// case 0:
// break;
// }
// }
// ```
//
// #### Common fixes
//
// If the type of the `case` expressions is correct, then change the
// expression in the `switch` statement to have the correct type:
//
// ```dart
// void f(String s) {
// switch (int.parse(s)) {
// case 0:
// break;
// }
// }
// ```
//
// If the type of the `switch` expression is correct, then change the `case`
// expressions to have the correct type:
//
// ```dart
// void f(String s) {
// switch (s) {
// case '0':
// break;
// }
// }
// ```
static const CompileTimeErrorCode SWITCH_EXPRESSION_NOT_ASSIGNABLE =
CompileTimeErrorCode(
'SWITCH_EXPRESSION_NOT_ASSIGNABLE',
"Type '{0}' of the switch expression isn't assignable to "
"the type '{1}' of case expressions.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type that can't be thrown
*/
// #### Description
//
// The analyzer produces this diagnostic when the type of the expression in a
// throw expression isn't assignable to `Object`. It isn't valid to throw
// `null`, so it isn't valid to use an expression that might evaluate to
// `null`.
//
// #### Example
//
// The following code produces this diagnostic because `s` might be `null`:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// throw [!s!];
// }
// ```
//
// #### Common fixes
//
// Add an explicit null check to the expression:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// throw s!;
// }
// ```
static const CompileTimeErrorCode THROW_OF_INVALID_TYPE = CompileTimeErrorCode(
'THROW_OF_INVALID_TYPE',
"The type '{0}' of the thrown expression must be assignable to 'Object'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the element whose type could not be inferred.
* 1: The [TopLevelInferenceError]'s arguments that led to the cycle.
*/
static const CompileTimeErrorCode TOP_LEVEL_CYCLE = CompileTimeErrorCode(
'TOP_LEVEL_CYCLE',
"The type of '{0}' can't be inferred because it depends on itself "
"through the cycle: {1}.",
correction:
"Try adding an explicit type to one or more of the variables in the "
"cycle in order to break the cycle.");
/**
* 15.3.1 Typedef: Any self reference, either directly, or recursively via
* another typedef, is a compile time error.
*/
static const CompileTimeErrorCode TYPE_ALIAS_CANNOT_REFERENCE_ITSELF =
CompileTimeErrorCode(
'TYPE_ALIAS_CANNOT_REFERENCE_ITSELF',
"Typedefs can't reference themselves directly or recursively via "
"another typedef.");
/**
* 15.1 Static Types: It is a static warning to use a deferred type in a type
* annotation.
*
* Parameters:
* 0: the name of the type that is deferred and being used in a type
* annotation
*/
static const CompileTimeErrorCode TYPE_ANNOTATION_DEFERRED_CLASS =
CompileTimeErrorCode(
'TYPE_ANNOTATION_DEFERRED_CLASS',
"The deferred type '{0}' can't be used in a declaration, cast or "
"type test.",
correction: "Try using a different type, or "
"changing the import to not be deferred.");
/**
* Parameters:
* 0: the name of the type used in the instance creation that should be
* limited by the bound as specified in the class declaration
* 1: the name of the bounding type
*/
// #### Description
//
// The analyzer produces this diagnostic when a type argument isn't the same
// as or a subclass of the bounds of the corresponding type parameter.
//
// #### Examples
//
// The following code produces this diagnostic because `String` isn't a
// subclass of `num`:
//
// ```dart
// class A<E extends num> {}
//
// var a = A<[!String!]>();
// ```
//
// #### Common fixes
//
// Change the type argument to be a subclass of the bounds:
//
// ```dart
// class A<E extends num> {}
//
// var a = A<int>();
// ```
static const CompileTimeErrorCode TYPE_ARGUMENT_NOT_MATCHING_BOUNDS =
CompileTimeErrorCode(
'TYPE_ARGUMENT_NOT_MATCHING_BOUNDS', "'{0}' doesn't extend '{1}'.",
correction: "Try using a type that is or is a subclass of '{1}'.",
hasPublishedDocs: true);
/**
* 10 Generics: However, a type parameter is considered to be a malformed type
* when referenced by a static member.
*
* 15.1 Static Types: Any use of a malformed type gives rise to a static
* warning. A malformed type is then interpreted as dynamic by the static type
* checker and the runtime.
*/
static const CompileTimeErrorCode TYPE_PARAMETER_REFERENCED_BY_STATIC =
CompileTimeErrorCode('TYPE_PARAMETER_REFERENCED_BY_STATIC',
"Static members can't reference type parameters of the class.",
correction: "Try removing the reference to the type parameter, or "
"making the member an instance member.");
/**
* 10 Generics: It is a static type warning if a type parameter is a supertype
* of its upper bound.
*
* Parameters:
* 0: the name of the type parameter
* 1: the name of the bounding type
*
* See [CompileTimeErrorCode.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS].
*/
static const CompileTimeErrorCode TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND =
CompileTimeErrorCode('TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND',
"'{0}' can't be a supertype of its upper bound.",
correction: "Try using a type that is or is a subclass of '{1}'.");
/**
* 12.31 Type Test: It is a static warning if <i>T</i> does not denote a type
* available in the current lexical scope.
*/
static const CompileTimeErrorCode TYPE_TEST_WITH_NON_TYPE =
CompileTimeErrorCode(
'TYPE_TEST_WITH_NON_TYPE',
"The name '{0}' isn't a type and can't be used in an 'is' "
"expression.",
correction: "Try correcting the name to match an existing type.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the name following the `is` in a
// type test expression isn't defined.
//
// #### Examples
//
// The following code produces this diagnostic because the name `Srting` isn't
// defined:
//
// ```dart
// void f(Object o) {
// if (o is [!Srting!]) {
// // ...
// }
// }
// ```
//
// #### Common fixes
//
// Replace the name with the name of a type:
//
// ```dart
// void f(Object o) {
// if (o is String) {
// // ...
// }
// }
// ```
static const CompileTimeErrorCode TYPE_TEST_WITH_UNDEFINED_NAME =
CompileTimeErrorCode(
'TYPE_TEST_WITH_UNDEFINED_NAME',
"The name '{0}' isn't defined, so it can't be used in an 'is' "
"expression.",
correction:
"Try changing the name to the name of an existing type, or "
"creating a type with the name '{0}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when an expression whose type is
// [potentially non-nullable][] is dereferenced without first verifying that
// the value isn't `null`.
//
// #### Example
//
// The following code produces this diagnostic because `s` can be `null` at
// the point where it's referenced:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// if ([!s!].length > 3) {
// // ...
// }
// }
// ```
//
// #### Common fixes
//
// If the value really can be `null`, then add a test to ensure that members
// are only accessed when the value isn't `null`:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// if (s != null && s.length > 3) {
// // ...
// }
// }
// ```
//
// If the expression is a variable and the value should never be `null`, then
// change the type of the variable to be non-nullable:
//
// ```dart
// %experiments=non-nullable
// void f(String s) {
// if (s.length > 3) {
// // ...
// }
// }
// ```
//
// If you believe that the value of the expression should never be `null`, but
// you can't change the type of the variable, and you're willing to risk
// having an exception thrown at runtime if you're wrong, then you can assert
// that the value isn't null:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// if (s!.length > 3) {
// // ...
// }
// }
// ```
static const CompileTimeErrorCode UNCHECKED_USE_OF_NULLABLE_VALUE =
CompileTimeErrorCode(
'UNCHECKED_USE_OF_NULLABLE_VALUE',
"An expression whose value can be 'null' must be null-checked before "
"it can be dereferenced.",
correction:
"Try checking that the value isn't 'null' before dereferencing "
"it.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a name that isn't defined is
// used as an annotation.
//
// #### Examples
//
// The following code produces this diagnostic because the name `undefined`
// isn't defined:
//
// ```dart
// [!@undefined!]
// void f() {}
// ```
//
// #### Common fixes
//
// If the name is correct, but it isn’t declared yet, then declare the name as
// a constant value:
//
// ```dart
// const undefined = 'undefined';
//
// @undefined
// void f() {}
// ```
//
// If the name is wrong, replace the name with the name of a valid constant:
//
// ```dart
// @deprecated
// void f() {}
// ```
//
// Otherwise, remove the annotation.
static const CompileTimeErrorCode UNDEFINED_ANNOTATION = CompileTimeErrorCode(
'UNDEFINED_ANNOTATION', "Undefined name '{0}' used as an annotation.",
correction: "Try defining the name or importing it from another library.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* Parameters:
* 0: the name of the undefined class
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of a class but either isn't defined or isn't visible
// in the scope in which it's being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because `Piont` isn't defined:
//
// ```dart
// class Point {}
//
// void f([!Piont!] p) {}
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// the name of a class that is defined. The example above can be corrected by
// fixing the spelling of the class:
//
// ```dart
// class Point {}
//
// void f(Point p) {}
// ```
//
// If the class is defined but isn't visible, then you probably need to add an
// import.
static const CompileTimeErrorCode UNDEFINED_CLASS = CompileTimeErrorCode(
'UNDEFINED_CLASS', "Undefined class '{0}'.",
correction: "Try changing the name to the name of an existing class, or "
"creating a class with the name '{0}'.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* Same as [CompileTimeErrorCode.UNDEFINED_CLASS], but to catch using
* "boolean" instead of "bool".
*/
static const CompileTimeErrorCode UNDEFINED_CLASS_BOOLEAN =
CompileTimeErrorCode(
'UNDEFINED_CLASS_BOOLEAN', "Undefined class 'boolean'.",
correction: "Try using the type 'bool'.");
/**
* Parameters:
* 0: the name of the superclass that does not define the invoked constructor
* 1: the name of the constructor being invoked
*/
// #### Description
//
// The analyzer produces this diagnostic when a superclass constructor is
// invoked in the initializer list of a constructor, but the superclass
// doesn't define the constructor being invoked.
//
// #### Examples
//
// The following code produces this diagnostic because `A` doesn't have an
// unnamed constructor:
//
// ```dart
// class A {
// A.n();
// }
// class B extends A {
// B() : [!super()!];
// }
// ```
//
// The following code produces this diagnostic because `A` doesn't have a
// constructor named `m`:
//
// ```dart
// class A {
// A.n();
// }
// class B extends A {
// B() : [!super.m()!];
// }
// ```
//
// #### Common fixes
//
// If the superclass defines a constructor that should be invoked, then change
// the constructor being invoked:
//
// ```dart
// class A {
// A.n();
// }
// class B extends A {
// B() : super.n();
// }
// ```
//
// If the superclass doesn't define an appropriate constructor, then define
// the constructor being invoked:
//
// ```dart
// class A {
// A.m();
// A.n();
// }
// class B extends A {
// B() : super.m();
// }
// ```
static const CompileTimeErrorCode UNDEFINED_CONSTRUCTOR_IN_INITIALIZER =
CompileTimeErrorCode('UNDEFINED_CONSTRUCTOR_IN_INITIALIZER',
"The class '{0}' doesn't have a constructor named '{1}'.",
correction: "Try defining a constructor named '{1}' in '{0}', or "
"invoking a different constructor.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the superclass that does not define the invoked constructor
*/
static const CompileTimeErrorCode
UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT =
CompileTimeErrorCodeWithUniqueName(
'UNDEFINED_CONSTRUCTOR_IN_INITIALIZER',
'UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT',
"The class '{0}' doesn't have an unnamed constructor.",
correction: "Try defining an unnamed constructor in '{0}', or "
"invoking a different constructor.");
/**
* Parameters:
* 0: the name of the enumeration constant that is not defined
* 1: the name of the enumeration used to access the constant
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of an enum constant, and the name either isn't
// defined or isn't visible in the scope in which it's being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because `E` doesn't define a
// constant named `c`:
//
// ```dart
// enum E {a, b}
//
// var e = E.[!c!];
// ```
//
// #### Common fixes
//
// If the constant should be defined, then add it to the declaration of the
// enum:
//
// ```dart
// enum E {a, b, c}
//
// var e = E.c;
// ```
//
// If the constant shouldn't be defined, then change the name to the name of
// an existing constant:
//
// ```dart
// enum E {a, b}
//
// var e = E.b;
// ```
static const CompileTimeErrorCode UNDEFINED_ENUM_CONSTANT =
CompileTimeErrorCode('UNDEFINED_ENUM_CONSTANT',
"There's no constant named '{0}' in '{1}'.",
correction:
"Try correcting the name to the name of an existing constant, or "
"defining a constant named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the getter that is undefined
* 1: the name of the extension that was explicitly specified
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is used to
// invoke a getter, but the getter isn't defined by the specified extension.
// The analyzer also produces this diagnostic when a static getter is
// referenced but isn't defined by the specified extension.
//
// #### Examples
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare an instance getter named `b`:
//
// ```dart
// extension E on String {
// String get a => 'a';
// }
//
// extension F on String {
// String get b => 'b';
// }
//
// void f() {
// E('c').[!b!];
// }
// ```
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare a static getter named `a`:
//
// ```dart
// extension E on String {}
//
// var x = E.[!a!];
// ```
//
// #### Common fixes
//
// If the name of the getter is incorrect, then change it to the name of an
// existing getter:
//
// ```dart
// extension E on String {
// String get a => 'a';
// }
//
// extension F on String {
// String get b => 'b';
// }
//
// void f() {
// E('c').a;
// }
// ```
//
// If the name of the getter is correct but the name of the extension is
// wrong, then change the name of the extension to the correct name:
//
// ```dart
// extension E on String {
// String get a => 'a';
// }
//
// extension F on String {
// String get b => 'b';
// }
//
// void f() {
// F('c').b;
// }
// ```
//
// If the name of the getter and extension are both correct, but the getter
// isn't defined, then define the getter:
//
// ```dart
// extension E on String {
// String get a => 'a';
// String get b => 'z';
// }
//
// extension F on String {
// String get b => 'b';
// }
//
// void f() {
// E('c').b;
// }
// ```
static const CompileTimeErrorCode UNDEFINED_EXTENSION_GETTER =
CompileTimeErrorCode('UNDEFINED_EXTENSION_GETTER',
"The getter '{0}' isn't defined for the extension '{1}'.",
correction:
"Try correcting the name to the name of an existing getter, or "
"defining a getter named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the method that is undefined
* 1: the name of the extension that was explicitly specified
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is used to
// invoke a method, but the method isn't defined by the specified extension.
// The analyzer also produces this diagnostic when a static method is
// referenced but isn't defined by the specified extension.
//
// #### Examples
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare an instance method named `b`:
//
// ```dart
// extension E on String {
// String a() => 'a';
// }
//
// extension F on String {
// String b() => 'b';
// }
//
// void f() {
// E('c').[!b!]();
// }
// ```
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare a static method named `a`:
//
// ```dart
// extension E on String {}
//
// var x = E.[!a!]();
// ```
//
// #### Common fixes
//
// If the name of the method is incorrect, then change it to the name of an
// existing method:
//
// ```dart
// extension E on String {
// String a() => 'a';
// }
//
// extension F on String {
// String b() => 'b';
// }
//
// void f() {
// E('c').a();
// }
// ```
//
// If the name of the method is correct, but the name of the extension is
// wrong, then change the name of the extension to the correct name:
//
// ```dart
// extension E on String {
// String a() => 'a';
// }
//
// extension F on String {
// String b() => 'b';
// }
//
// void f() {
// F('c').b();
// }
// ```
//
// If the name of the method and extension are both correct, but the method
// isn't defined, then define the method:
//
// ```dart
// extension E on String {
// String a() => 'a';
// String b() => 'z';
// }
//
// extension F on String {
// String b() => 'b';
// }
//
// void f() {
// E('c').b();
// }
// ```
static const CompileTimeErrorCode UNDEFINED_EXTENSION_METHOD =
CompileTimeErrorCode('UNDEFINED_EXTENSION_METHOD',
"The method '{0}' isn't defined for the extension '{1}'.",
correction:
"Try correcting the name to the name of an existing method, or "
"defining a method named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the operator that is undefined
* 1: the name of the extension that was explicitly specified
*/
static const CompileTimeErrorCode UNDEFINED_EXTENSION_OPERATOR =
CompileTimeErrorCode('UNDEFINED_EXTENSION_OPERATOR',
"The operator '{0}' isn't defined for the extension '{1}'.",
correction: "Try defining the operator '{0}'.");
/**
* Parameters:
* 0: the name of the setter that is undefined
* 1: the name of the extension that was explicitly specified
*/
// #### Description
//
// The analyzer produces this diagnostic when an extension override is used to
// invoke a setter, but the setter isn't defined by the specified extension.
// The analyzer also produces this diagnostic when a static setter is
// referenced but isn't defined by the specified extension.
//
// #### Examples
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare an instance setter named `b`:
//
// ```dart
// extension E on String {
// set a(String v) {}
// }
//
// extension F on String {
// set b(String v) {}
// }
//
// void f() {
// E('c').[!b!] = 'd';
// }
// ```
//
// The following code produces this diagnostic because the extension `E`
// doesn't declare a static setter named `a`:
//
// ```dart
// extension E on String {}
//
// void f() {
// E.[!a!] = 3;
// }
// ```
//
// #### Common fixes
//
// If the name of the setter is incorrect, then change it to the name of an
// existing setter:
//
// ```dart
// extension E on String {
// set a(String v) {}
// }
//
// extension F on String {
// set b(String v) {}
// }
//
// void f() {
// E('c').a = 'd';
// }
// ```
//
// If the name of the setter is correct, but the name of the extension is
// wrong, then change the name of the extension to the correct name:
//
// ```dart
// extension E on String {
// set a(String v) {}
// }
//
// extension F on String {
// set b(String v) {}
// }
//
// void f() {
// F('c').b = 'd';
// }
// ```
//
// If the name of the setter and extension are both correct, but the setter
// isn't defined, then define the setter:
//
// ```dart
// extension E on String {
// set a(String v) {}
// set b(String v) {}
// }
//
// extension F on String {
// set b(String v) {}
// }
//
// void f() {
// E('c').b = 'd';
// }
// ```
static const CompileTimeErrorCode UNDEFINED_EXTENSION_SETTER =
CompileTimeErrorCode('UNDEFINED_EXTENSION_SETTER',
"The setter '{0}' isn't defined for the extension '{1}'.",
correction:
"Try correcting the name to the name of an existing setter, or "
"defining a setter named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the method that is undefined
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of a function but either isn't defined or isn't
// visible in the scope in which it's being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because the name `emty` isn't
// defined:
//
// ```dart
// List<int> empty() => [];
//
// void main() {
// print([!emty!]());
// }
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// the name of a function that is defined. The example above can be corrected
// by fixing the spelling of the function:
//
// ```dart
// List<int> empty() => [];
//
// void main() {
// print(empty());
// }
// ```
//
// If the function is defined but isn't visible, then you probably need to add
// an import or re-arrange your code to make the function visible.
static const CompileTimeErrorCode UNDEFINED_FUNCTION = CompileTimeErrorCode(
'UNDEFINED_FUNCTION', "The function '{0}' isn't defined.",
correction: "Try importing the library that defines '{0}', "
"correcting the name to the name of an existing function, or "
"defining a function named '{0}'.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* Parameters:
* 0: the name of the getter
* 1: the name of the enclosing type where the getter is being looked for
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of a getter but either isn't defined or isn't
// visible in the scope in which it's being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because `String` has no member
// named `len`:
//
// ```dart
// int f(String s) => s.[!len!];
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// the name of a getter that is defined. The example above can be corrected by
// fixing the spelling of the getter:
//
// ```dart
// int f(String s) => s.length;
// ```
static const CompileTimeErrorCode UNDEFINED_GETTER = CompileTimeErrorCode(
'UNDEFINED_GETTER', "The getter '{0}' isn't defined for the type '{1}'.",
correction: "Try importing the library that defines '{0}', "
"correcting the name to the name of an existing getter, or "
"defining a getter or field named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the identifier
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// either isn't defined or isn't visible in the scope in which it's being
// referenced.
//
// #### Examples
//
// The following code produces this diagnostic because the name `rihgt` isn't
// defined:
//
// ```dart
// int min(int left, int right) => left <= [!rihgt!] ? left : right;
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// an identifier that is defined. The example above can be corrected by
// fixing the spelling of the variable:
//
// ```dart
// int min(int left, int right) => left <= right ? left : right;
// ```
//
// If the identifier is defined but isn't visible, then you probably need to
// add an import or re-arrange your code to make the identifier visible.
static const CompileTimeErrorCode UNDEFINED_IDENTIFIER =
CompileTimeErrorCode('UNDEFINED_IDENTIFIER', "Undefined name '{0}'.",
correction: "Try correcting the name to one that is defined, or "
"defining the name.",
hasPublishedDocs: true,
isUnresolvedIdentifier: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the name `await` is used in a
// method or function body without being declared, and the body isn't marked
// with the `async` keyword. The name `await` only introduces an await
// expression in an asynchronous function.
//
// #### Example
//
// The following code produces this diagnostic because the name `await` is
// used in the body of `f` even though the body of `f` isn't marked with the
// `async` keyword:
//
// ```dart
// void f(p) { [!await!] p; }
// ```
//
// #### Common fixes
//
// Add the keyword `async` to the function body:
//
// ```dart
// void f(p) async { await p; }
// ```
static const CompileTimeErrorCode UNDEFINED_IDENTIFIER_AWAIT =
CompileTimeErrorCode('UNDEFINED_IDENTIFIER_AWAIT',
"Undefined name 'await' in function body not marked with 'async'.",
correction: "Try correcting the name to one that is defined, "
"defining the name, or "
"adding 'async' to the enclosing function body.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the method that is undefined
* 1: the resolved type name that the method lookup is happening on
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of a method but either isn't defined or isn't
// visible in the scope in which it's being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because the identifier
// `removeMiddle` isn't defined:
//
// ```dart
// int f(List<int> l) => l.[!removeMiddle!]();
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// the name of a method that is defined. The example above can be corrected by
// fixing the spelling of the method:
//
// ```dart
// int f(List<int> l) => l.removeLast();
// ```
static const CompileTimeErrorCode UNDEFINED_METHOD = CompileTimeErrorCode(
'UNDEFINED_METHOD', "The method '{0}' isn't defined for the type '{1}'.",
correction:
"Try correcting the name to the name of an existing method, or "
"defining a method named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the requested named parameter
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function invocation
// has a named argument, but the method or function being invoked doesn't
// define a parameter with the same name.
//
// #### Examples
//
// The following code produces this diagnostic because `m` doesn't declare a
// named parameter named `a`:
//
// ```dart
// class C {
// m({int b}) {}
// }
//
// void f(C c) {
// c.m([!a!]: 1);
// }
// ```
//
// #### Common fixes
//
// If the argument name is mistyped, then replace it with the correct name.
// The example above can be fixed by changing `a` to `b`:
//
// ```dart
// class C {
// m({int b}) {}
// }
//
// void f(C c) {
// c.m(b: 1);
// }
// ```
//
// If a subclass adds a parameter with the name in question, then cast the
// receiver to the subclass:
//
// ```dart
// class C {
// m({int b}) {}
// }
//
// class D extends C {
// m({int a, int b}) {}
// }
//
// void f(C c) {
// (c as D).m(a: 1);
// }
// ```
//
// If the parameter should be added to the function, then add it:
//
// ```dart
// class C {
// m({int a, int b}) {}
// }
//
// void f(C c) {
// c.m(a: 1);
// }
// ```
static const CompileTimeErrorCode UNDEFINED_NAMED_PARAMETER =
CompileTimeErrorCode('UNDEFINED_NAMED_PARAMETER',
"The named parameter '{0}' isn't defined.",
correction:
"Try correcting the name to an existing named parameter's name, "
"or defining a named parameter with the name '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the operator
* 1: the name of the enclosing type where the operator is being looked for
*/
// #### Description
//
// The analyzer produces this diagnostic when a user-definable operator is
// invoked on an object for which the operator isn't defined.
//
// #### Examples
//
// The following code produces this diagnostic because the class `C` doesn't
// define the operator `+`:
//
// ```dart
// class C {}
//
// C f(C c) => c [!+!] 2;
// ```
//
// #### Common fixes
//
// If the operator should be defined for the class, then define it:
//
// ```dart
// class C {
// C operator +(int i) => this;
// }
//
// C f(C c) => c + 2;
// ```
static const CompileTimeErrorCode UNDEFINED_OPERATOR = CompileTimeErrorCode(
'UNDEFINED_OPERATOR',
"The operator '{0}' isn't defined for the type '{1}'.",
correction: "Try defining the operator '{0}'.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a prefixed identifier is found
// where the prefix is valid, but the identifier isn't declared in any of the
// libraries imported using that prefix.
//
// #### Examples
//
// The following code produces this diagnostic because `dart:core` doesn't
// define anything named `a`:
//
// ```dart
// import 'dart:core' as p;
//
// void f() {
// p.[!a!];
// }
// ```
//
// #### Common fixes
//
// If the library in which the name is declared isn't imported yet, add an
// import for the library.
//
// If the name is wrong, then change it to one of the names that's declared in
// the imported libraries.
static const CompileTimeErrorCode UNDEFINED_PREFIXED_NAME =
CompileTimeErrorCode(
'UNDEFINED_PREFIXED_NAME',
"The name '{0}' is being referenced through the prefix '{1}', but it "
"isn't defined in any of the libraries imported using that "
"prefix.",
correction: "Try correcting the prefix or "
"importing the library that defines '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the setter
* 1: the name of the enclosing type where the setter is being looked for
*/
// #### Description
//
// The analyzer produces this diagnostic when it encounters an identifier that
// appears to be the name of a setter but either isn't defined or isn't
// visible in the scope in which the identifier is being referenced.
//
// #### Examples
//
// The following code produces this diagnostic because there isn't a setter
// named `z`:
//
// ```dart
// class C {
// int x = 0;
// void m(int y) {
// this.[!z!] = y;
// }
// }
// ```
//
// #### Common fixes
//
// If the identifier isn't defined, then either define it or replace it with
// the name of a setter that is defined. The example above can be corrected by
// fixing the spelling of the setter:
//
// ```dart
// class C {
// int x = 0;
// void m(int y) {
// this.x = y;
// }
// }
// ```
static const CompileTimeErrorCode UNDEFINED_SETTER = CompileTimeErrorCode(
'UNDEFINED_SETTER', "The setter '{0}' isn't defined for the type '{1}'.",
correction: "Try importing the library that defines '{0}', "
"correcting the name to the name of an existing setter, or "
"defining a setter or field named '{0}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the getter
* 1: the name of the enclosing type where the getter is being looked for
*/
static const CompileTimeErrorCode UNDEFINED_SUPER_GETTER =
CompileTimeErrorCodeWithUniqueName(
'UNDEFINED_SUPER_MEMBER',
'UNDEFINED_SUPER_GETTER',
"The getter '{0}' isn't defined in a superclass of '{1}'.",
correction:
"Try correcting the name to the name of an existing getter, or "
"defining a getter or field named '{0}' in a superclass.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the method that is undefined
* 1: the resolved type name that the method lookup is happening on
*/
// #### Description
//
// The analyzer produces this diagnostic when an inherited member (method,
// getter, setter, or operator) is referenced using `super`, but there’s no
// member with that name in the superclass chain.
//
// #### Examples
//
// The following code produces this diagnostic because `Object` doesn't define
// a method named `n`:
//
// ```dart
// class C {
// void m() {
// super.[!n!]();
// }
// }
// ```
//
// The following code produces this diagnostic because `Object` doesn't define
// a getter named `g`:
//
// ```dart
// class C {
// void m() {
// super.[!g!];
// }
// }
// ```
//
// #### Common fixes
//
// If the inherited member you intend to invoke has a different name, then
// make the name of the invoked member match the inherited member.
//
// If the member you intend to invoke is defined in the same class, then
// remove the `super.`.
//
// If the member isn’t defined, then either add the member to one of the
// superclasses or remove the invocation.
static const CompileTimeErrorCode UNDEFINED_SUPER_METHOD =
CompileTimeErrorCodeWithUniqueName(
'UNDEFINED_SUPER_MEMBER',
'UNDEFINED_SUPER_METHOD',
"The method '{0}' isn't defined in a superclass of '{1}'.",
correction:
"Try correcting the name to the name of an existing method, or "
"defining a method named '{0}' in a superclass.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the operator
* 1: the name of the enclosing type where the operator is being looked for
*/
static const CompileTimeErrorCode UNDEFINED_SUPER_OPERATOR =
CompileTimeErrorCodeWithUniqueName(
'UNDEFINED_SUPER_MEMBER',
'UNDEFINED_SUPER_OPERATOR',
"The operator '{0}' isn't defined in a superclass of '{1}'.",
correction: "Try defining the operator '{0}' in a superclass.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the setter
* 1: the name of the enclosing type where the setter is being looked for
*/
static const CompileTimeErrorCode UNDEFINED_SUPER_SETTER =
CompileTimeErrorCodeWithUniqueName(
'UNDEFINED_SUPER_MEMBER',
'UNDEFINED_SUPER_SETTER',
"The setter '{0}' isn't defined in a superclass of '{1}'.",
correction:
"Try correcting the name to the name of an existing setter, or "
"defining a setter or field named '{0}' in a superclass.",
hasPublishedDocs: true);
/**
* 12.15.1 Ordinary Invocation: It is a static type warning if <i>T</i> does
* not have an accessible (3.2) instance member named <i>m</i>.
*
* This is a specialization of [INSTANCE_ACCESS_TO_STATIC_MEMBER] that is used
* when we are able to find the name defined in a supertype. It exists to
* provide a more informative error message.
*
* Parameters:
* 0: the name of the defining type
*/
static const CompileTimeErrorCode
UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER = CompileTimeErrorCode(
'UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER',
"Static members from supertypes must be qualified by the name of the "
"defining type.",
correction: "Try adding '{0}.' before the name.");
/**
* Parameters:
* 0: the name of the defining type
*/
// #### Description
//
// The analyzer produces this diagnostic when an undefined name is found, and
// the name is the same as a static member of the extended type or one of its
// superclasses.
//
// #### Examples
//
// The following code produces this diagnostic because `m` is a static member
// of the extended type `C`:
//
// ```dart
// class C {
// static void m() {}
// }
//
// extension E on C {
// void f() {
// [!m!]();
// }
// }
// ```
//
// #### Common fixes
//
// If you're trying to reference a static member that's declared outside the
// extension, then add the name of the class or extension before the reference
// to the member:
//
// ```dart
// class C {
// static void m() {}
// }
//
// extension E on C {
// void f() {
// C.m();
// }
// }
// ```
//
// If you're referencing a member that isn't declared yet, add a declaration:
//
// ```dart
// class C {
// static void m() {}
// }
//
// extension E on C {
// void f() {
// m();
// }
//
// void m() {}
// }
// ```
static const CompileTimeErrorCode
UNQUALIFIED_REFERENCE_TO_STATIC_MEMBER_OF_EXTENDED_TYPE =
CompileTimeErrorCode(
'UNQUALIFIED_REFERENCE_TO_STATIC_MEMBER_OF_EXTENDED_TYPE',
"Static members from the extended type or one of its superclasses "
"must be qualified by the name of the defining type.",
correction: "Try adding '{0}.' before the name.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the URI pointing to a non-existent file
*/
// #### Description
//
// The analyzer produces this diagnostic when an import, export, or part
// directive is found where the URI refers to a file that doesn't exist.
//
// #### Examples
//
// If the file `lib.dart` doesn't exist, the following code produces this
// diagnostic:
//
// ```dart
// import [!'lib.dart'!];
// ```
//
// #### Common fixes
//
// If the URI was mistyped or invalid, then correct the URI.
//
// If the URI is correct, then create the file.
static const CompileTimeErrorCode URI_DOES_NOT_EXIST = CompileTimeErrorCode(
'URI_DOES_NOT_EXIST', "Target of URI doesn't exist: '{0}'.",
correction: "Try creating the file referenced by the URI, or "
"Try using a URI for a file that does exist.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the URI pointing to a non-existent file
*/
// #### Description
//
// The analyzer produces this diagnostic when an import, export, or part
// directive is found where the URI refers to a file that doesn't exist and
// the name of the file ends with a pattern that's commonly produced by code
// generators, such as one of the following:
// - `.g.dart`
// - `.pb.dart`
// - `.pbenum.dart`
// - `.pbserver.dart`
// - `.pbjson.dart`
// - `.template.dart`
//
// #### Examples
//
// If the file `lib.g.dart` doesn't exist, the following code produces this
// diagnostic:
//
// ```dart
// import [!'lib.g.dart'!];
// ```
//
// #### Common fixes
//
// If the file is a generated file, then run the generator that generates the
// file.
//
// If the file isn't a generated file, then check the spelling of the URI or
// create the file.
static const CompileTimeErrorCode URI_HAS_NOT_BEEN_GENERATED =
CompileTimeErrorCode('URI_HAS_NOT_BEEN_GENERATED',
"Target of URI hasn't been generated: '{0}'.",
correction: "Try running the generator that will generate the file "
"referenced by the URI.",
hasPublishedDocs: true);
/**
* 14.1 Imports: It is a compile-time error if <i>x</i> is not a compile-time
* constant, or if <i>x</i> involves string interpolation.
*
* 14.3 Parts: It is a compile-time error if <i>s</i> is not a compile-time
* constant, or if <i>s</i> involves string interpolation.
*
* 14.5 URIs: It is a compile-time error if the string literal <i>x</i> that
* describes a URI is not a compile-time constant, or if <i>x</i> involves
* string interpolation.
*/
static const CompileTimeErrorCode URI_WITH_INTERPOLATION =
CompileTimeErrorCode(
'URI_WITH_INTERPOLATION', "URIs can't use string interpolation.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when it finds an expression whose
// type is `void`, and the expression is used in a place where a value is
// expected, such as before a member access or on the right-hand side of an
// assignment.
//
// #### Examples
//
// The following code produces this diagnostic because `f` doesn't produce an
// object on which `toString` can be invoked:
//
// ```dart
// void f() {}
//
// void g() {
// [!f()!].toString();
// }
// ```
//
// #### Common fixes
//
// Either rewrite the code so that the expression has a value or rewrite the
// code so that it doesn't depend on the value.
static const CompileTimeErrorCode USE_OF_VOID_RESULT = CompileTimeErrorCode(
'USE_OF_VOID_RESULT',
"This expression has a type of 'void' so its value can't be used.",
correction:
"Try checking to see if you're using the correct API; there might "
"be a function or call that returns void you didn't expect. Also "
"check type parameters and variables which might also be void.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the type of the object being assigned.
* 1: the type of the variable being assigned to
*/
// #### Description
//
// The analyzer produces this diagnostic when the evaluation of a constant
// expression would result in a `CastException`.
//
// #### Examples
//
// The following code produces this diagnostic because the value of `x` is an
// `int`, which can't be assigned to `y` because an `int` isn't a `String`:
//
// ```dart
// const Object x = 0;
// const String y = [!x!];
// ```
//
// #### Common fixes
//
// If the declaration of the constant is correct, then change the value being
// assigned to be of the correct type:
//
// ```dart
// const Object x = 0;
// const String y = '$x';
// ```
//
// If the assigned value is correct, then change the declaration to have the
// correct type:
//
// ```dart
// const Object x = 0;
// const int y = x;
// ```
static const CompileTimeErrorCode VARIABLE_TYPE_MISMATCH =
CompileTimeErrorCode(
'VARIABLE_TYPE_MISMATCH',
"A value of type '{0}' can't be assigned to a const variable of type "
"'{1}'.",
correction: "Try using a subtype, or removing the 'const' keyword",
hasPublishedDocs: true);
/**
* Let `C` be a generic class that declares a formal type parameter `X`, and
* assume that `T` is a direct superinterface of `C`.
*
* It is a compile-time error if `X` is explicitly defined as a covariant or
* 'in' type parameter and `X` occurs in a non-covariant position in `T`.
* It is a compile-time error if `X` is explicitly defined as a contravariant
* or 'out' type parameter and `X` occurs in a non-contravariant position in
* `T`.
*
* Parameters:
* 0: the name of the type parameter
* 1: the variance modifier defined for {0}
* 2: the variance position of the type parameter {0} in the
* superinterface {3}
* 3: the name of the superinterface
*/
static const CompileTimeErrorCode
WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE =
CompileTimeErrorCode(
'WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE',
"'{0}' is an '{1}' type parameter and can't be used in an '{2}' position in '{3}'.",
correction: "Try using 'in' type parameters in 'in' positions and 'out' "
"type parameters in 'out' positions in the superinterface.",
);
/**
* Parameters:
* 0: the name of the declared operator
* 1: the number of parameters expected
* 2: the number of parameters found in the operator declaration
*/
// #### Description
//
// The analyzer produces this diagnostic when a declaration of an operator has
// the wrong number of parameters.
//
// #### Examples
//
// The following code produces this diagnostic because the operator `+` must
// have a single parameter corresponding to the right operand:
//
// ```dart
// class C {
// int operator [!+!](a, b) => 0;
// }
// ```
//
// #### Common fixes
//
// Add or remove parameters to match the required number:
//
// ```dart
// class C {
// int operator +(a) => 0;
// }
// ```
// TODO(brianwilkerson) It would be good to add a link to the spec or some
// other documentation that lists the number of parameters for each operator,
// but I don't know what to link to.
static const CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR =
CompileTimeErrorCode(
'WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR',
"Operator '{0}' should declare exactly {1} parameters, but {2} "
"found.",
hasPublishedDocs: true);
/**
* 7.1.1 Operators: It is a compile time error if the arity of the
* user-declared operator - is not 0 or 1.
*
* Parameters:
* 0: the number of parameters found in the operator declaration
*/
static const CompileTimeErrorCode
WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS = CompileTimeErrorCode(
'WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS',
"Operator '-' should declare 0 or 1 parameter, but {0} found.");
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when a setter is found that doesn't
// declare exactly one required positional parameter.
//
// #### Examples
//
// The following code produces this diagnostic because the setter `s` declares
// two required parameters:
//
// ```dart
// class C {
// set [!s!](int x, int y) {}
// }
// ```
//
// The following code produces this diagnostic because the setter `s` declares
// one optional parameter:
//
// ```dart
// class C {
// set [!s!]([int x]) {}
// }
// ```
//
// #### Common fixes
//
// Change the declaration so that there's exactly one required positional
// parameter:
//
// ```dart
// class C {
// set s(int x) {}
// }
// ```
static const CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER =
CompileTimeErrorCode('WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER',
"Setters must declare exactly one required positional parameter.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: the name of the type being referenced (<i>G</i>)
* 1: the number of type parameters that were declared
* 2: the number of type arguments provided
*/
// #### Description
//
// The analyzer produces this diagnostic when a type that has type parameters
// is used and type arguments are provided, but the number of type arguments
// isn't the same as the number of type parameters.
//
// The analyzer also produces this diagnostic when a constructor is invoked
// and the number of type arguments doesn't match the number of type
// parameters declared for the class.
//
// #### Examples
//
// The following code produces this diagnostic because `C` has one type
// parameter but two type arguments are provided when it is used as a type
// annotation:
//
// ```dart
// class C<E> {}
//
// void f([!C<int, int>!] x) {}
// ```
//
// The following code produces this diagnostic because `C` declares one type
// parameter, but two type arguments are provided when creating an instance:
//
// ```dart
// class C<E> {}
//
// var c = [!C<int, int>!]();
// ```
//
// #### Common fixes
//
// Add or remove type arguments, as necessary, to match the number of type
// parameters defined for the type:
//
// ```dart
// class C<E> {}
//
// void f(C<int> x) {}
// ```
static const CompileTimeErrorCode WRONG_NUMBER_OF_TYPE_ARGUMENTS =
CompileTimeErrorCode(
'WRONG_NUMBER_OF_TYPE_ARGUMENTS',
"The type '{0}' is declared with {1} type parameters, "
"but {2} type arguments were given.",
correction:
"Try adjusting the number of type arguments to match the number "
"of type parameters.",
hasPublishedDocs: true);
/**
* It will be a static type warning if <i>m</i> is not a generic method with
* exactly <i>n</i> type parameters.
*
* Parameters:
* 0: the name of the class being instantiated
* 1: the name of the constructor being invoked
*/
static const CompileTimeErrorCode WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR =
CompileTimeErrorCode('WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR',
"The constructor '{0}.{1}' doesn't have type parameters.",
correction: "Try moving type arguments to after the type name.");
/**
* Parameters:
* 0: the name of the extension being referenced
* 1: the number of type parameters that were declared
* 2: the number of type arguments provided
*/
static const CompileTimeErrorCode WRONG_NUMBER_OF_TYPE_ARGUMENTS_EXTENSION =
CompileTimeErrorCode(
'WRONG_NUMBER_OF_TYPE_ARGUMENTS_EXTENSION',
"The extension '{0}' is declared with {1} type parameters, "
"but {2} type arguments were given.",
correction: "Try adjusting the number of type arguments.");
/**
* Parameters:
* 0: the name of the method being referenced (<i>G</i>)
* 1: the number of type parameters that were declared
* 2: the number of type arguments provided
*/
// #### Description
//
// The analyzer produces this diagnostic when a method or function is invoked
// with a different number of type arguments than the number of type
// parameters specified in its declaration. There must either be no type
// arguments or the number of arguments must match the number of parameters.
//
// #### Example
//
// The following code produces this diagnostic because the invocation of the
// method `m` has two type arguments, but the declaration of `m` only has one
// type parameter:
//
// ```dart
// class C {
// int m<A>(A a) => 0;
// }
//
// int f(C c) => c.m[!<int, int>!](2);
// ```
//
// #### Common fixes
//
// If the type arguments are necessary, then make them match the number of
// type parameters by either adding or removing type arguments:
//
// ```dart
// class C {
// int m<A>(A a) => 0;
// }
//
// int f(C c) => c.m<int>(2);
// ```
//
// If the type arguments aren't necessary, then remove them:
//
// ```dart
// class C {
// int m<A>(A a) => 0;
// }
//
// int f(C c) => c.m(2);
// ```
static const CompileTimeErrorCode WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD =
CompileTimeErrorCode(
'WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD',
"The method '{0}' is declared with {1} type parameters, but {2} type "
"arguments are given.",
correction: "Try adjusting the number of type arguments.");
/**
* Let `C` be a generic class that declares a formal type parameter `X`, and
* assume that `T` is a direct superinterface of `C`. It is a compile-time
* error if `X` occurs contravariantly or invariantly in `T`.
*/
static const CompileTimeErrorCode
WRONG_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE = CompileTimeErrorCode(
'WRONG_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE',
"'{0}' can't be used contravariantly or invariantly in '{1}'.",
correction: "Try not using class type parameters in types of formal "
"parameters of function types, nor in explicitly contravariant or "
"invariant superinterfaces.",
);
/**
* Let `C` be a generic class that declares a formal type parameter `X`.
*
* If `X` is explicitly contravariant then it is a compile-time error for
* `X` to occur in a non-contravariant position in a member signature in the
* body of `C`, except when `X` is in a contravariant position in the type
* annotation of a covariant formal parameter.
*
* If `X` is explicitly covariant then it is a compile-time error for
* `X` to occur in a non-covariant position in a member signature in the
* body of `C`, except when `X` is in a covariant position in the type
* annotation of a covariant formal parameter.
*
* Parameters:
* 0: the variance modifier defined for {0}
* 1: the name of the type parameter
* 2: the variance position that the type parameter {1} is in
*/
static const CompileTimeErrorCode WRONG_TYPE_PARAMETER_VARIANCE_POSITION =
CompileTimeErrorCode(
'WRONG_TYPE_PARAMETER_VARIANCE_POSITION',
"The '{0}' type parameter '{1}' can't be used in an '{2}' position.",
correction: "Try removing the type parameter or change the explicit "
"variance modifier declaration for the type parameter to another one "
"of 'in', 'out', or 'inout'.",
);
/**
* ?? Yield: It is a compile-time error if a yield statement appears in a
* function that is not a generator function.
*/
static const CompileTimeErrorCode YIELD_EACH_IN_NON_GENERATOR =
CompileTimeErrorCode(
'YIELD_EACH_IN_NON_GENERATOR',
"Yield-each statements must be in a generator function "
"(one marked with either 'async*' or 'sync*').",
correction:
"Try adding 'async*' or 'sync*' to the enclosing function.");
/**
* ?? Yield: It is a compile-time error if a yield statement appears in a
* function that is not a generator function.
*/
static const CompileTimeErrorCode YIELD_IN_NON_GENERATOR =
CompileTimeErrorCode(
'YIELD_IN_NON_GENERATOR',
"Yield statements must be in a generator function "
"(one marked with either 'async*' or 'sync*').",
correction:
"Try adding 'async*' or 'sync*' to the enclosing function.");
/**
* 17.16.1 Yield: Let T be the static type of e [the expression to the right
* of "yield"] and let f be the immediately enclosing function. It is a
* static type warning if either:
*
* - the body of f is marked async* and the type Stream<T> may not be
* assigned to the declared return type of f.
*
* - the body of f is marked sync* and the type Iterable<T> may not be
* assigned to the declared return type of f.
*
* 17.16.2 Yield-Each: Let T be the static type of e [the expression to the
* right of "yield*"] and let f be the immediately enclosing function. It is
* a static type warning if T may not be assigned to the declared return type
* of f. If f is synchronous it is a static type warning if T may not be
* assigned to Iterable. If f is asynchronous it is a static type warning if
* T may not be assigned to Stream.
*/
static const CompileTimeErrorCode YIELD_OF_INVALID_TYPE =
CompileTimeErrorCode(
'YIELD_OF_INVALID_TYPE',
"The type '{0}' implied by the 'yield' expression must be assignable "
"to '{1}'.");
/**
* Initialize a newly created error code to have the given [name]. The message
* associated with the error will be created from the given [message]
* template. The correction associated with the error will be created from the
* given [correction] template.
*/
const CompileTimeErrorCode(String name, String message,
{String correction,
bool hasPublishedDocs,
bool isUnresolvedIdentifier = false})
: super.temporary(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs,
isUnresolvedIdentifier: isUnresolvedIdentifier);
@override
ErrorSeverity get errorSeverity => ErrorType.COMPILE_TIME_ERROR.severity;
@override
ErrorType get type => ErrorType.COMPILE_TIME_ERROR;
}
class CompileTimeErrorCodeWithUniqueName extends CompileTimeErrorCode {
@override
final String uniqueName;
const CompileTimeErrorCodeWithUniqueName(
String name, this.uniqueName, String message,
{String correction,
bool hasPublishedDocs,
bool isUnresolvedIdentifier = false})
: super(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs,
isUnresolvedIdentifier: isUnresolvedIdentifier);
}
/**
* This class has experimental Language-specific codes.
*
* Currently it only contains codes related to implicit dynamic.
*/
class LanguageCode extends ErrorCode {
/**
* This is appended to the end of an error message about implicit dynamic.
*
* The idea is to make sure the user is aware that this error message is the
* result of turning on a particular option, and they are free to turn it
* back off.
*/
static const String _implicitDynamicCorrection =
"Try adding an explicit type, or remove implicit-dynamic from your "
"analysis options file.";
static const LanguageCode IMPLICIT_DYNAMIC_FIELD = LanguageCode(
'IMPLICIT_DYNAMIC_FIELD', "Missing field type for '{0}'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_FUNCTION = LanguageCode(
'IMPLICIT_DYNAMIC_FUNCTION',
"Missing type arguments for generic function '{0}<{1}>'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_INVOKE = LanguageCode(
'IMPLICIT_DYNAMIC_INVOKE',
"Missing type arguments for calling generic function type '{0}'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_LIST_LITERAL = LanguageCode(
'IMPLICIT_DYNAMIC_LIST_LITERAL',
"Missing type argument for list literal.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_MAP_LITERAL = LanguageCode(
'IMPLICIT_DYNAMIC_MAP_LITERAL', "Missing type arguments for map literal.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_METHOD = LanguageCode(
'IMPLICIT_DYNAMIC_METHOD',
"Missing type arguments for generic method '{0}<{1}>'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_PARAMETER = LanguageCode(
'IMPLICIT_DYNAMIC_PARAMETER', "Missing parameter type for '{0}'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_RETURN = LanguageCode(
'IMPLICIT_DYNAMIC_RETURN', "Missing return type for '{0}'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_TYPE = LanguageCode(
'IMPLICIT_DYNAMIC_TYPE', "Missing type arguments for generic type '{0}'.",
correction: _implicitDynamicCorrection);
static const LanguageCode IMPLICIT_DYNAMIC_VARIABLE = LanguageCode(
'IMPLICIT_DYNAMIC_VARIABLE', "Missing variable type for '{0}'.",
correction: _implicitDynamicCorrection);
@override
final ErrorType type = ErrorType.COMPILE_TIME_ERROR;
/**
* Initialize a newly created language code to have the given [type] and
* [name].
*
* The message associated with the code will be created from the given
* [message] template. The correction associated with the code will be
* created from the optional [correction] template.
*/
const LanguageCode(String name, String message,
{String correction, bool hasPublishedDocs})
: super.temporary(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs ?? false);
@override
ErrorSeverity get errorSeverity => type.severity;
}
/**
* The error codes used for static warnings. The convention for this class is
* for the name of the error code to indicate the problem that caused the error
* to be generated and for the error message to explain what is wrong and, when
* appropriate, how the problem can be corrected.
*/
class StaticWarningCode extends AnalyzerErrorCode {
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic in two cases.
//
// The first is when the left operand of an `??` operator can't be `null`.
// The right operand is only evaluated if the left operand has the value
// `null`, and because the left operand can't be `null`, the right operand is
// never evaluated.
//
// The second is when the left-hand side of an assignment using the `??=`
// operator can't be `null`. The right-hand side is only evaluated if the
// left-hand side has the value `null`, and because the left-hand side can't
// be `null`, the right-hand side is never evaluated.
//
// #### Example
//
// The following code produces this diagnostic because `x` can't be `null`:
//
// ```dart
// %experiments=non-nullable
// int f(int x) {
// return x ?? [!0!];
// }
// ```
//
// The following code produces this diagnostic because `f` can't be `null`:
//
// ```dart
// %experiments=non-nullable
// class C {
// int f = -1;
//
// void m(int x) {
// f ??= [!x!];
// }
// }
// ```
//
// #### Common fixes
//
// If the diagnostic is reported for an `??` operator, then remove the `??`
// operator and the right operand:
//
// ```dart
// %experiments=non-nullable
// int f(int x) {
// return x;
// }
// ```
//
// If the diagnostic is reported for an assignment, and the assignment isn't
// needed, then remove the assignment:
//
// ```dart
// %experiments=non-nullable
// class C {
// int f = -1;
//
// void m(int x) {
// }
// }
// ```
//
// If the assignment is needed, but should be based on a different condition,
// then rewrite the code to use `=` and the different condition:
//
// ```dart
// %experiments=non-nullable
// class C {
// int f = -1;
//
// void m(int x) {
// if (f < 0) {
// f = x;
// }
// }
// }
// ```
static const StaticWarningCode DEAD_NULL_AWARE_EXPRESSION = StaticWarningCode(
'DEAD_NULL_AWARE_EXPRESSION',
"The left operand can't be null, so the right operand is never executed.",
correction: "Try removing the operator and the right operand.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: The null-aware operator that is invalid
* 1: The non-null-aware operator that can replace the invalid operator
*/
// #### Description
//
// The analyzer produces this diagnostic when a null-aware operator (`?.`,
// `?..`, `?[`, `?..[`, or `...?`) is used on a target that's known to be
// non-nullable.
//
// #### Example
//
// The following code produces this diagnostic because `s` can't be `null`:
//
// ```dart
// %experiments=non-nullable
// int? getLength(String s) {
// return s[!?.!]length;
// }
// ```
//
// The following code produces this diagnostic because `a` can't be `null`:
//
// ```dart
// %experiments=non-nullable
// var a = [];
// var b = [[!...?!]a];
// ```
//
// The following code produces this diagnostic because `s?.length` can't
// return `null`:
//
// ```dart
// %experiments=non-nullable
// void f(String? s) {
// s?.length[!?.!]isEven;
// }
// ```
//
// The reason `s?.length` can't return `null` is because the null-aware
// operator following `s` short-circuits the evaluation of both `length` and
// `isEven` if `s` is `null`. In other words, if `s` is `null`, then neither
// `length` nor `isEven` will be invoked, and if `s` is non-`null`, then
// `length` can't return a `null` value. Either way, `isEven` can't be invoked
// on a `null` value, so the null-aware operator is neither necessary nor
// allowed. See
// [Understanding null safety](https://dart.dev/null-safety/understanding-null-safety#smarter-null-aware-methods)
// for more details.
//
// #### Common fixes
//
// Replace the null-aware operator with a non-null-aware equivalent; for
// example, change `?.` to `.`:
//
// ```dart
// %experiments=non-nullable
// int getLength(String s) {
// return s.length;
// }
// ```
//
// (Note that the return type was also changed to be non-nullable, which might
// not be appropriate in some cases.)
static const StaticWarningCode INVALID_NULL_AWARE_OPERATOR =
StaticWarningCode(
'INVALID_NULL_AWARE_OPERATOR',
"The receiver can't be null, so the null-aware operator '{0}' can't "
"be used.",
correction: "Try replacing the operator '{0}' with '{1}'.",
hasPublishedDocs: true);
/**
* Parameters:
* 0: The null-aware operator that is invalid
* 1: The non-null-aware operator that can replace the invalid operator
*/
static const StaticWarningCode
INVALID_NULL_AWARE_OPERATOR_AFTER_SHORT_CIRCUIT =
StaticWarningCodeWithUniqueName(
'INVALID_NULL_AWARE_OPERATOR',
'INVALID_NULL_AWARE_OPERATOR_AFTER_SHORT_CIRCUIT',
"The receiver can't be null because of short-circuiting, so the "
"null-aware operator '{0}' can't be used.",
correction: "Try replacing the operator '{0}' with '{1}'.",
hasPublishedDocs: true);
/**
* 7.1 Instance Methods: It is a static warning if an instance method
* <i>m1</i> overrides an instance member <i>m2</i>, the signature of
* <i>m2</i> explicitly specifies a default value for a formal parameter
* <i>p</i> and the signature of <i>m1</i> specifies a different default value
* for <i>p</i>.
*/
static const StaticWarningCode
INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED = StaticWarningCode(
'INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED',
"Parameters can't override default values, this method overrides "
"'{0}.{1}' where '{2}' has a different value.",
correction: "Try using the same default value in both methods.");
/**
* 7.1 Instance Methods: It is a static warning if an instance method
* <i>m1</i> overrides an instance member <i>m2</i>, the signature of
* <i>m2</i> explicitly specifies a default value for a formal parameter
* <i>p</i> and the signature of <i>m1</i> specifies a different default value
* for <i>p</i>.
*/
static const StaticWarningCode
INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL = StaticWarningCode(
'INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL',
"Parameters can't override default values, this method overrides "
"'{0}.{1}' where this positional parameter has a different "
"value.",
correction: "Try using the same default value in both methods.");
/**
* Parameters:
* 0: the name of the constant that is missing
*/
// #### Description
//
// The analyzer produces this diagnostic when a `switch` statement for an enum
// doesn't include an option for one of the values in the enumeration.
//
// Note that `null` is always a possible value for an enum and therefore also
// must be handled.
//
// #### Examples
//
// The following code produces this diagnostic because the enum constant `e2`
// isn't handled:
//
// ```dart
// enum E { e1, e2 }
//
// void f(E e) {
// [!switch (e)!] {
// case E.e1:
// break;
// }
// }
// ```
//
// #### Common fixes
//
// If there's special handling for the missing values, then add a `case`
// clause for each of the missing values:
//
// ```dart
// enum E { e1, e2 }
//
// void f(E e) {
// switch (e) {
// case E.e1:
// break;
// case E.e2:
// break;
// }
// }
// ```
//
// If the missing values should be handled the same way, then add a `default`
// clause:
//
// ```dart
// enum E { e1, e2 }
//
// void f(E e) {
// switch (e) {
// case E.e1:
// break;
// default:
// break;
// }
// }
// ```
// TODO(brianwilkerson) This documentation will need to be updated when NNBD
// ships.
static const StaticWarningCode MISSING_ENUM_CONSTANT_IN_SWITCH =
StaticWarningCode(
'MISSING_ENUM_CONSTANT_IN_SWITCH', "Missing case clause for '{0}'.",
correction: "Try adding a case clause for the missing constant, or "
"adding a default clause.",
hasPublishedDocs: true);
/**
* No parameters.
*/
// #### Description
//
// The analyzer produces this diagnostic when the operand of the `!` operator
// can't be `null`.
//
// #### Example
//
// The following code produces this diagnostic because `x` can't be `null`:
//
// ```dart
// %experiments=non-nullable
// int f(int x) {
// return x[!!!];
// }
// ```
//
// #### Common fixes
//
// Remove the null check operator (`!`):
//
// ```dart
// %experiments=non-nullable
// int f(int x) {
// return x;
// }
// ```
static const StaticWarningCode UNNECESSARY_NON_NULL_ASSERTION =
StaticWarningCode('UNNECESSARY_NON_NULL_ASSERTION',
"The '!' will have no effect because the receiver can't be null.",
correction: "Try removing the '!' operator.", hasPublishedDocs: true);
/**
* Initialize a newly created error code to have the given [name]. The message
* associated with the error will be created from the given [message]
* template. The correction associated with the error will be created from the
* given [correction] template.
*/
const StaticWarningCode(String name, String message,
{String correction,
bool hasPublishedDocs,
bool isUnresolvedIdentifier = false})
: super.temporary(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs,
isUnresolvedIdentifier: isUnresolvedIdentifier);
@override
ErrorSeverity get errorSeverity => ErrorSeverity.WARNING;
@override
ErrorType get type => ErrorType.STATIC_WARNING;
}
class StaticWarningCodeWithUniqueName extends StaticWarningCode {
@override
final String uniqueName;
const StaticWarningCodeWithUniqueName(
String name, this.uniqueName, String message,
{String correction,
bool hasPublishedDocs,
bool isUnresolvedIdentifier = false})
: super(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs,
isUnresolvedIdentifier: isUnresolvedIdentifier);
}
/**
* This class has Strong Mode specific error codes.
*
* "Strong Mode" was the prototype for Dart 2's sound type system. Many of these
* errors became part of Dart 2. Some of them are optional flags, used for
* stricter checking.
*
* These error codes tend to use the same message across different severity
* levels, so they are grouped for clarity.
*/
class StrongModeCode extends ErrorCode {
/*
* TODO(brianwilkerson) Make the TOP_LEVEL_ error codes be errors rather than
* hints and then clean up the function _errorSeverity in
* test/src/task/strong/strong_test_helper.dart.
*/
/* TODO(leafp) Delete most of these.
*/
static const StrongModeCode TOP_LEVEL_FUNCTION_LITERAL_BLOCK = StrongModeCode(
ErrorType.HINT,
'TOP_LEVEL_FUNCTION_LITERAL_BLOCK',
"The type of the function literal can't be inferred because the "
"literal has a block as its body.",
correction: "Try adding an explicit type to the variable.");
static const StrongModeCode TOP_LEVEL_IDENTIFIER_NO_TYPE = StrongModeCode(
ErrorType.HINT,
'TOP_LEVEL_IDENTIFIER_NO_TYPE',
"The type of '{0}' can't be inferred because the type of '{1}' "
"couldn't be inferred.",
correction:
"Try adding an explicit type to either the variable '{0}' or the "
"variable '{1}'.");
static const StrongModeCode TOP_LEVEL_INSTANCE_GETTER = StrongModeCode(
ErrorType.STATIC_WARNING,
'TOP_LEVEL_INSTANCE_GETTER',
"The type of '{0}' can't be inferred because it refers to an instance "
"getter, '{1}', which has an implicit type.",
correction: "Add an explicit type for either '{0}' or '{1}'.");
static const StrongModeCode TOP_LEVEL_INSTANCE_METHOD = StrongModeCode(
ErrorType.STATIC_WARNING,
'TOP_LEVEL_INSTANCE_METHOD',
"The type of '{0}' can't be inferred because it refers to an instance "
"method, '{1}', which has an implicit type.",
correction: "Add an explicit type for either '{0}' or '{1}'.");
@override
final ErrorType type;
/**
* Initialize a newly created error code to have the given [type] and [name].
*
* The message associated with the error will be created from the given
* [message] template. The correction associated with the error will be
* created from the optional [correction] template.
*/
const StrongModeCode(ErrorType type, String name, String message,
{String correction, bool hasPublishedDocs})
: type = type,
super.temporary(name, message,
correction: correction,
hasPublishedDocs: hasPublishedDocs ?? false);
@override
ErrorSeverity get errorSeverity => type.severity;
}