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dart / sdk.git / 3a8a14e23a43682e9d99d8f14869e3baa23b3e62 / . / pkg / analyzer-experimental / lib / src / generated / resolver.dart
blob: ed1a436d645efbbdf8abb304dd3f4359b4bdfa13 [file] [log] [blame]
// This code was auto-generated, is not intended to be edited, and is subject to
// significant change. Please see the README file for more information.
library engine.resolver;
import 'dart:collection';
import 'java_core.dart';
import 'java_engine.dart';
import 'source.dart';
import 'error.dart';
import 'scanner.dart' show Keyword, TokenType, Token, KeywordToken, StringToken;
import 'utilities_dart.dart';
import 'ast.dart';
import 'element.dart' hide HideCombinator, ShowCombinator;
import 'engine.dart';
import 'element.dart' as __imp_combi show HideCombinator, ShowCombinator;
/**
* Instances of the class {@code CompilationUnitBuilder} build an element model for a single
* compilation unit.
*/
class CompilationUnitBuilder {
/**
* The analysis context in which the element model will be built.
*/
AnalysisContextImpl _analysisContext;
/**
* The listener to which errors will be reported.
*/
AnalysisErrorListener _errorListener;
/**
* Initialize a newly created compilation unit element builder.
* @param analysisContext the analysis context in which the element model will be built
* @param errorListener the listener to which errors will be reported
*/
CompilationUnitBuilder(AnalysisContextImpl analysisContext, AnalysisErrorListener errorListener) {
this._analysisContext = analysisContext;
this._errorListener = errorListener;
}
/**
* Build the compilation unit element for the given source.
* @param source the source describing the compilation unit
* @return the compilation unit element that was built
* @throws AnalysisException if the analysis could not be performed
*/
CompilationUnitElementImpl buildCompilationUnit(Source source) => buildCompilationUnit2(source, _analysisContext.parse2(source, _errorListener));
/**
* Build the compilation unit element for the given source.
* @param source the source describing the compilation unit
* @param unit the AST structure representing the compilation unit
* @return the compilation unit element that was built
* @throws AnalysisException if the analysis could not be performed
*/
CompilationUnitElementImpl buildCompilationUnit2(Source source11, CompilationUnit unit) {
ElementHolder holder = new ElementHolder();
ElementBuilder builder = new ElementBuilder(holder);
unit.accept(builder);
CompilationUnitElementImpl element = new CompilationUnitElementImpl(source11.shortName);
element.accessors = holder.accessors;
element.functions = holder.functions;
element.source = source11;
element.typeAliases = holder.typeAliases;
element.types = holder.types;
element.variables = holder.variables;
unit.element = element;
return element;
}
}
/**
* Instances of the class {@code ElementBuilder} traverse an AST structure and build the element
* model representing the AST structure.
*/
class ElementBuilder extends RecursiveASTVisitor<Object> {
/**
* The element holder associated with the element that is currently being built.
*/
ElementHolder _currentHolder;
/**
* A flag indicating whether a variable declaration is in the context of a field declaration.
*/
bool _inFieldContext = false;
/**
* Initialize a newly created element builder to build the elements for a compilation unit.
* @param initialHolder the element holder associated with the compilation unit being built
*/
ElementBuilder(ElementHolder initialHolder) {
_currentHolder = initialHolder;
}
Object visitCatchClause(CatchClause node) {
SimpleIdentifier exceptionParameter2 = node.exceptionParameter;
if (exceptionParameter2 != null) {
VariableElementImpl exception = new VariableElementImpl.con1(exceptionParameter2);
_currentHolder.addVariable(exception);
exceptionParameter2.element = exception;
SimpleIdentifier stackTraceParameter2 = node.stackTraceParameter;
if (stackTraceParameter2 != null) {
VariableElementImpl stackTrace = new VariableElementImpl.con1(stackTraceParameter2);
_currentHolder.addVariable(stackTrace);
stackTraceParameter2.element = stackTrace;
}
}
node.visitChildren(this);
return null;
}
Object visitClassDeclaration(ClassDeclaration node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier className = node.name;
ClassElementImpl element = new ClassElementImpl(className);
List<ConstructorElement> constructors3 = holder.constructors;
if (constructors3.length == 0) {
ConstructorElementImpl constructor = new ConstructorElementImpl(null);
constructor.synthetic = true;
FunctionTypeImpl type = new FunctionTypeImpl.con1(constructor);
type.returnType = element.type;
constructor.type = type;
constructors3 = <ConstructorElement> [constructor];
}
element.abstract = node.abstractKeyword != null;
element.accessors = holder.accessors;
element.constructors = constructors3;
element.fields = holder.fields;
element.methods = holder.methods;
List<TypeVariableElement> typeVariables4 = holder.typeVariables;
element.typeVariables = typeVariables4;
InterfaceTypeImpl interfaceType = new InterfaceTypeImpl.con1(element);
int typeVariableCount = typeVariables4.length;
List<Type2> typeArguments = new List<Type2>.fixedLength(typeVariableCount);
for (int i = 0; i < typeVariableCount; i++) {
TypeVariableElementImpl typeVariable = (typeVariables4[i] as TypeVariableElementImpl);
TypeVariableTypeImpl typeArgument = new TypeVariableTypeImpl(typeVariable);
typeVariable.type = typeArgument;
typeArguments[i] = typeArgument;
}
interfaceType.typeArguments = typeArguments;
element.type = interfaceType;
_currentHolder.addType(element);
className.element = element;
return null;
}
Object visitClassTypeAlias(ClassTypeAlias node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier className = node.name;
ClassElementImpl element = new ClassElementImpl(className);
element.abstract = node.abstractKeyword != null;
List<TypeVariableElement> typeVariables5 = holder.typeVariables;
element.typeVariables = typeVariables5;
InterfaceTypeImpl interfaceType = new InterfaceTypeImpl.con1(element);
int typeVariableCount = typeVariables5.length;
List<Type2> typeArguments = new List<Type2>.fixedLength(typeVariableCount);
for (int i = 0; i < typeVariableCount; i++) {
TypeVariableElementImpl typeVariable = (typeVariables5[i] as TypeVariableElementImpl);
TypeVariableTypeImpl typeArgument = new TypeVariableTypeImpl(typeVariable);
typeVariable.type = typeArgument;
typeArguments[i] = typeArgument;
}
interfaceType.typeArguments = typeArguments;
element.type = interfaceType;
_currentHolder.addType(element);
className.element = element;
return null;
}
Object visitConstructorDeclaration(ConstructorDeclaration node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier constructorName = node.name;
ConstructorElementImpl element = new ConstructorElementImpl(constructorName);
if (node.factoryKeyword != null) {
element.factory = true;
}
element.functions = holder.functions;
element.labels = holder.labels;
element.localVariables = holder.variables;
element.parameters = holder.parameters;
_currentHolder.addConstructor(element);
node.element = element;
if (constructorName != null) {
constructorName.element = element;
}
return null;
}
Object visitDefaultFormalParameter(DefaultFormalParameter node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node.defaultValue);
FunctionElementImpl initializer = new FunctionElementImpl();
initializer.functions = holder.functions;
initializer.labels = holder.labels;
initializer.localVariables = holder.variables;
initializer.parameters = holder.parameters;
SimpleIdentifier parameterName = node.parameter.identifier;
ParameterElementImpl parameter = new ParameterElementImpl(parameterName);
parameter.const2 = node.isConst();
parameter.final2 = node.isFinal();
parameter.initializer = initializer;
parameter.parameterKind = node.kind;
_currentHolder.addParameter(parameter);
parameterName.element = parameter;
node.parameter.accept(this);
return null;
}
Object visitFieldDeclaration(FieldDeclaration node) {
bool wasInField = _inFieldContext;
_inFieldContext = true;
try {
node.visitChildren(this);
} finally {
_inFieldContext = wasInField;
}
return null;
}
Object visitFieldFormalParameter(FieldFormalParameter node) {
if (node.parent is! DefaultFormalParameter) {
SimpleIdentifier parameterName = node.identifier;
ParameterElementImpl parameter = new ParameterElementImpl(parameterName);
parameter.const2 = node.isConst();
parameter.initializingFormal = true;
parameter.final2 = node.isFinal();
parameter.parameterKind = node.kind;
_currentHolder.addParameter(parameter);
parameterName.element = parameter;
}
node.visitChildren(this);
return null;
}
Object visitFunctionDeclaration(FunctionDeclaration node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier functionName = node.name;
FunctionElementImpl element = new FunctionElementImpl.con1(functionName);
element.functions = holder.functions;
element.labels = holder.labels;
element.localVariables = holder.variables;
element.parameters = holder.parameters;
_currentHolder.addFunction(element);
functionName.element = element;
return null;
}
Object visitFunctionExpression(FunctionExpression node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier functionName = null;
FunctionElementImpl element = new FunctionElementImpl.con1(functionName);
element.functions = holder.functions;
element.labels = holder.labels;
element.localVariables = holder.variables;
element.parameters = holder.parameters;
FunctionTypeImpl type = new FunctionTypeImpl.con1(element);
element.type = type;
_currentHolder.addFunction(element);
node.element = element;
return null;
}
Object visitFunctionTypeAlias(FunctionTypeAlias node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
SimpleIdentifier aliasName = node.name;
List<ParameterElement> parameters10 = holder.parameters;
TypeAliasElementImpl element = new TypeAliasElementImpl(aliasName);
element.parameters = parameters10;
element.typeVariables = holder.typeVariables;
FunctionTypeImpl type = new FunctionTypeImpl.con2(element);
element.type = type;
_currentHolder.addTypeAlias(element);
aliasName.element = element;
return null;
}
Object visitFunctionTypedFormalParameter(FunctionTypedFormalParameter node) {
if (node.parent is! DefaultFormalParameter) {
SimpleIdentifier parameterName = node.identifier;
ParameterElementImpl parameter = new ParameterElementImpl(parameterName);
parameter.parameterKind = node.kind;
_currentHolder.addParameter(parameter);
parameterName.element = parameter;
}
visitChildren(new ElementHolder(), node);
return null;
}
Object visitLabeledStatement(LabeledStatement node) {
bool onSwitchStatement = node.statement is SwitchStatement;
for (Label label in node.labels) {
SimpleIdentifier labelName = label.label;
LabelElementImpl element = new LabelElementImpl(labelName, onSwitchStatement, false);
_currentHolder.addLabel(element);
labelName.element = element;
}
node.visitChildren(this);
return null;
}
Object visitMethodDeclaration(MethodDeclaration node) {
ElementHolder holder = new ElementHolder();
visitChildren(holder, node);
Token property = node.propertyKeyword;
if (property == null) {
Identifier methodName = node.name;
String nameOfMethod = methodName.name;
if (nameOfMethod == TokenType.MINUS.lexeme && node.parameters.parameters.length == 0) {
nameOfMethod = "unary-";
}
MethodElementImpl element = new MethodElementImpl.con2(nameOfMethod, methodName.offset);
Token keyword = node.modifierKeyword;
element.abstract = matches(keyword, Keyword.ABSTRACT);
element.functions = holder.functions;
element.labels = holder.labels;
element.localVariables = holder.variables;
element.parameters = holder.parameters;
element.static = matches(keyword, Keyword.STATIC);
_currentHolder.addMethod(element);
methodName.element = element;
} else {
Identifier propertyNameNode = node.name;
String propertyName = propertyNameNode.name;
FieldElementImpl field = (_currentHolder.getField(propertyName) as FieldElementImpl);
if (field == null) {
field = new FieldElementImpl.con2(node.name.name);
field.final2 = true;
field.static = matches(node.modifierKeyword, Keyword.STATIC);
_currentHolder.addField(field);
}
if (matches(property, Keyword.GET)) {
PropertyAccessorElementImpl getter = new PropertyAccessorElementImpl.con2(propertyNameNode);
getter.functions = holder.functions;
getter.labels = holder.labels;
getter.localVariables = holder.variables;
getter.field = field;
getter.getter = true;
field.getter = getter;
_currentHolder.addAccessor(getter);
propertyNameNode.element = getter;
} else {
PropertyAccessorElementImpl setter = new PropertyAccessorElementImpl.con2(propertyNameNode);
setter.functions = holder.functions;
setter.labels = holder.labels;
setter.localVariables = holder.variables;
setter.parameters = holder.parameters;
setter.field = field;
setter.setter = true;
field.setter = setter;
field.final2 = false;
_currentHolder.addAccessor(setter);
propertyNameNode.element = setter;
}
}
return null;
}
Object visitSimpleFormalParameter(SimpleFormalParameter node) {
if (node.parent is! DefaultFormalParameter) {
SimpleIdentifier parameterName = node.identifier;
ParameterElementImpl parameter = new ParameterElementImpl(parameterName);
parameter.const2 = node.isConst();
parameter.final2 = node.isFinal();
parameter.parameterKind = node.kind;
_currentHolder.addParameter(parameter);
parameterName.element = parameter;
}
node.visitChildren(this);
return null;
}
Object visitSwitchCase(SwitchCase node) {
for (Label label in node.labels) {
SimpleIdentifier labelName = label.label;
LabelElementImpl element = new LabelElementImpl(labelName, false, true);
_currentHolder.addLabel(element);
labelName.element = element;
}
node.visitChildren(this);
return null;
}
Object visitSwitchDefault(SwitchDefault node) {
for (Label label in node.labels) {
SimpleIdentifier labelName = label.label;
LabelElementImpl element = new LabelElementImpl(labelName, false, true);
_currentHolder.addLabel(element);
labelName.element = element;
}
node.visitChildren(this);
return null;
}
Object visitTypeParameter(TypeParameter node) {
SimpleIdentifier parameterName = node.name;
TypeVariableElementImpl element = new TypeVariableElementImpl(parameterName);
TypeVariableTypeImpl type = new TypeVariableTypeImpl(element);
element.type = type;
_currentHolder.addTypeVariable(element);
parameterName.element = element;
node.visitChildren(this);
return null;
}
Object visitVariableDeclaration(VariableDeclaration node) {
VariableElementImpl element;
if (_inFieldContext) {
SimpleIdentifier fieldName = node.name;
FieldElementImpl field = new FieldElementImpl.con1(fieldName);
element = field;
_currentHolder.addField(field);
fieldName.element = field;
} else {
SimpleIdentifier variableName = node.name;
element = new VariableElementImpl.con1(variableName);
_currentHolder.addVariable(element);
variableName.element = element;
}
Token keyword26 = ((node.parent as VariableDeclarationList)).keyword;
bool isFinal = matches(keyword26, Keyword.FINAL);
element.const2 = matches(keyword26, Keyword.CONST);
element.final2 = isFinal;
if (node.initializer != null) {
ElementHolder holder = new ElementHolder();
bool wasInFieldContext = _inFieldContext;
_inFieldContext = false;
try {
visitChildren(holder, node.initializer);
} finally {
_inFieldContext = wasInFieldContext;
}
FunctionElementImpl initializer = new FunctionElementImpl();
initializer.functions = holder.functions;
initializer.labels = holder.labels;
initializer.localVariables = holder.variables;
initializer.synthetic = true;
element.initializer = initializer;
}
if (_inFieldContext) {
FieldElementImpl field = (element as FieldElementImpl);
PropertyAccessorElementImpl getter = new PropertyAccessorElementImpl.con1(field);
getter.getter = true;
_currentHolder.addAccessor(getter);
field.getter = getter;
if (!isFinal) {
PropertyAccessorElementImpl setter = new PropertyAccessorElementImpl.con1(field);
setter.setter = true;
_currentHolder.addAccessor(setter);
field.setter = setter;
}
field.static = matches(((node.parent.parent as FieldDeclaration)).keyword, Keyword.STATIC);
}
node.visitChildren(this);
return null;
}
/**
* Return {@code true} if the given token is a token for the given keyword.
* @param token the token being tested
* @param keyword the keyword being tested for
* @return {@code true} if the given token is a token for the given keyword
*/
bool matches(Token token, Keyword keyword34) => token != null && identical(token.type, TokenType.KEYWORD) && identical(((token as KeywordToken)).keyword, keyword34);
/**
* Make the given holder be the current holder while visiting the children of the given node.
* @param holder the holder that will gather elements that are built while visiting the children
* @param node the node whose children are to be visited
*/
void visitChildren(ElementHolder holder, ASTNode node) {
if (node != null) {
ElementHolder previousHolder = _currentHolder;
_currentHolder = holder;
try {
node.visitChildren(this);
} finally {
_currentHolder = previousHolder;
}
}
}
}
/**
* Instances of the class {@code ElementHolder} hold on to elements created while traversing an AST
* structure so that they can be accessed when creating their enclosing element.
*/
class ElementHolder {
List<PropertyAccessorElement> _accessors = new List<PropertyAccessorElement>();
List<ConstructorElement> _constructors = new List<ConstructorElement>();
List<FieldElement> _fields = new List<FieldElement>();
List<FunctionElement> _functions = new List<FunctionElement>();
List<LabelElement> _labels = new List<LabelElement>();
List<MethodElement> _methods = new List<MethodElement>();
List<TypeAliasElement> _typeAliases = new List<TypeAliasElement>();
List<ParameterElement> _parameters = new List<ParameterElement>();
List<ClassElement> _types = new List<ClassElement>();
List<TypeVariableElement> _typeVariables = new List<TypeVariableElement>();
List<VariableElement> _variables = new List<VariableElement>();
/**
* Initialize a newly created element holder.
*/
ElementHolder() : super() {
}
void addAccessor(PropertyAccessorElement element) {
_accessors.add(element);
}
void addConstructor(ConstructorElement element) {
_constructors.add(element);
}
void addField(FieldElement element) {
_fields.add(element);
}
void addFunction(FunctionElement element) {
_functions.add(element);
}
void addLabel(LabelElement element) {
_labels.add(element);
}
void addMethod(MethodElement element) {
_methods.add(element);
}
void addParameter(ParameterElement element) {
_parameters.add(element);
}
void addType(ClassElement element) {
_types.add(element);
}
void addTypeAlias(TypeAliasElement element) {
_typeAliases.add(element);
}
void addTypeVariable(TypeVariableElement element) {
_typeVariables.add(element);
}
void addVariable(VariableElement element) {
_variables.add(element);
}
List<PropertyAccessorElement> get accessors => new List.from(_accessors);
List<ConstructorElement> get constructors => new List.from(_constructors);
FieldElement getField(String fieldName) {
for (FieldElement field in _fields) {
if (field.name == fieldName) {
return field;
}
}
return null;
}
List<FieldElement> get fields => new List.from(_fields);
List<FunctionElement> get functions => new List.from(_functions);
List<LabelElement> get labels => new List.from(_labels);
List<MethodElement> get methods => new List.from(_methods);
List<ParameterElement> get parameters => new List.from(_parameters);
List<TypeAliasElement> get typeAliases => new List.from(_typeAliases);
List<ClassElement> get types => new List.from(_types);
List<TypeVariableElement> get typeVariables => new List.from(_typeVariables);
List<VariableElement> get variables => new List.from(_variables);
}
/**
* Instances of the class {@code ElementResolver} are used by instances of {@link ResolverVisitor}to resolve references within the AST structure to the elements being referenced. The requirements
* for the element resolver are:
* <ol>
* <li>Every {@link SimpleIdentifier} should be resolved to the element to which it refers.
* Specifically:
* <ul>
* <li>An identifier within the declaration of that name should resolve to the element being
* declared.</li>
* <li>An identifier denoting a prefix should resolve to the element representing the import that
* defines the prefix (an {@link ImportElement}).</li>
* <li>An identifier denoting a variable should resolve to the element representing the variable (a{@link VariableElement}).</li>
* <li>An identifier denoting a parameter should resolve to the element representing the parameter
* (a {@link ParameterElement}).</li>
* <li>An identifier denoting a field should resolve to the element representing the getter or
* setter being invoked (a {@link PropertyAccessorElement}).</li>
* <li>An identifier denoting the name of a method or function being invoked should resolve to the
* element representing the method or function (a {@link ExecutableElement}).</li>
* <li>An identifier denoting a label should resolve to the element representing the label (a{@link LabelElement}).</li>
* </ul>
* The identifiers within directives are exceptions to this rule and are covered below.</li>
* <li>Every node containing a token representing an operator that can be overridden ({@link BinaryExpression}, {@link PrefixExpression}, {@link PostfixExpression}) should resolve to
* the element representing the method invoked by that operator (a {@link MethodElement}).</li>
* <li>Every {@link FunctionExpressionInvocation} should resolve to the element representing the
* function being invoked (a {@link FunctionElement}). This will be the same element as that to
* which the name is resolved if the function has a name, but is provided for those cases where an
* unnamed function is being invoked.</li>
* <li>Every {@link LibraryDirective} and {@link PartOfDirective} should resolve to the element
* representing the library being specified by the directive (a {@link LibraryElement}) unless, in
* the case of a part-of directive, the specified library does not exist.</li>
* <li>Every {@link ImportDirective} and {@link ExportDirective} should resolve to the element
* representing the library being specified by the directive unless the specified library does not
* exist (a {@link LibraryElement}).</li>
* <li>The identifier representing the prefix in an {@link ImportDirective} should resolve to the
* element representing the prefix (a {@link PrefixElement}).</li>
* <li>The identifiers in the hide and show combinators in {@link ImportDirective}s and{@link ExportDirective}s should resolve to the elements that are being hidden or shown,
* respectively, unless those names are not defined in the specified library (or the specified
* library does not exist).</li>
* <li>Every {@link PartDirective} should resolve to the element representing the compilation unit
* being specified by the string unless the specified compilation unit does not exist (a{@link CompilationUnitElement}).</li>
* </ol>
* Note that AST nodes that would represent elements that are not defined are not resolved to
* anything. This includes such things as references to undeclared variables (which is an error) and
* names in hide and show combinators that are not defined in the imported library (which is not an
* error).
*/
class ElementResolver extends SimpleASTVisitor<Object> {
/**
* The resolver driving this participant.
*/
ResolverVisitor _resolver;
/**
* Initialize a newly created visitor to resolve the nodes in a compilation unit.
* @param resolver the resolver driving this participant
*/
ElementResolver(ResolverVisitor resolver) {
this._resolver = resolver;
}
Object visitAssignmentExpression(AssignmentExpression node) {
TokenType operator7 = node.operator.type;
if (operator7 != TokenType.EQ) {
operator7 = operatorFromCompoundAssignment(operator7);
Expression leftNode = node.leftHandSide;
if (leftNode != null) {
Type2 leftType = leftNode.staticType;
if (leftType != null) {
Element leftElement = leftType.element;
if (leftElement != null) {
MethodElement method = lookUpMethod(leftElement, operator7.lexeme, 1, []);
if (method != null) {
node.element = method;
} else {
}
}
}
}
}
return null;
}
Object visitBinaryExpression(BinaryExpression node) {
Token operator8 = node.operator;
if (operator8.isUserDefinableOperator()) {
Type2 leftType = getType(node.leftOperand);
Element leftTypeElement;
if (leftType == null) {
return null;
} else if (leftType is FunctionType) {
leftTypeElement = _resolver.typeProvider.functionType.element;
} else {
leftTypeElement = leftType.element;
}
String methodName = operator8.lexeme;
MethodElement member = lookUpMethod(leftTypeElement, methodName, 1, []);
if (member == null) {
_resolver.reportError2(ResolverErrorCode.CANNOT_BE_RESOLVED, operator8, [methodName]);
} else {
node.element = member;
}
}
return null;
}
Object visitBreakStatement(BreakStatement node) {
SimpleIdentifier labelNode = node.label;
LabelElementImpl labelElement = lookupLabel(node, labelNode);
if (labelElement != null && labelElement.isOnSwitchMember()) {
_resolver.reportError(ResolverErrorCode.BREAK_LABEL_ON_SWITCH_MEMBER, labelNode, []);
}
return null;
}
Object visitConstructorName(ConstructorName node) {
Type2 type10 = node.type.type;
if (type10 is! InterfaceType) {
return null;
}
ClassElement classElement = ((type10 as InterfaceType)).element;
ConstructorElement constructor;
SimpleIdentifier name14 = node.name;
if (name14 == null) {
constructor = classElement.unnamedConstructor;
} else {
constructor = classElement.getNamedConstructor(name14.name);
name14.element = constructor;
}
node.element = constructor;
return null;
}
Object visitContinueStatement(ContinueStatement node) {
SimpleIdentifier labelNode = node.label;
LabelElementImpl labelElement = lookupLabel(node, labelNode);
if (labelElement != null && labelElement.isOnSwitchStatement()) {
_resolver.reportError(ResolverErrorCode.CONTINUE_LABEL_ON_SWITCH, labelNode, []);
}
return null;
}
Object visitFunctionExpressionInvocation(FunctionExpressionInvocation node) => null;
Object visitImportDirective(ImportDirective node) {
SimpleIdentifier prefixNode = node.prefix;
if (prefixNode != null) {
String prefixName = prefixNode.name;
for (PrefixElement prefixElement in _resolver.definingLibrary.prefixes) {
if (prefixElement.name == prefixName) {
recordResolution(prefixNode, prefixElement);
}
return null;
}
}
return null;
}
Object visitIndexExpression(IndexExpression node) {
Type2 arrayType = getType(node.array);
if (arrayType == null) {
return null;
}
Element arrayTypeElement = arrayType.element;
String operator;
if (node.inSetterContext()) {
operator = TokenType.INDEX_EQ.lexeme;
} else {
operator = TokenType.INDEX.lexeme;
}
MethodElement member = lookUpMethod(arrayTypeElement, operator, 1, []);
if (member == null) {
_resolver.reportError(ResolverErrorCode.CANNOT_BE_RESOLVED, node, [operator]);
} else {
node.element = member;
}
return null;
}
Object visitInstanceCreationExpression(InstanceCreationExpression node) {
node.element = node.constructorName.element;
return null;
}
Object visitLibraryIdentifier(LibraryIdentifier node) => null;
Object visitMethodInvocation(MethodInvocation node) {
SimpleIdentifier methodName2 = node.methodName;
Expression target4 = node.target;
Element element;
if (target4 == null) {
element = _resolver.nameScope.lookup(methodName2, _resolver.definingLibrary);
if (element == null) {
element = lookUpMethod(_resolver.enclosingClass, methodName2.name, -1, []);
}
} else {
Type2 targetType = getType(target4);
if (targetType is InterfaceType) {
int parameterCount = 0;
List<String> parameterNames = new List<String>();
ArgumentList argumentList10 = node.argumentList;
for (Expression argument in argumentList10.arguments) {
if (argument is NamedExpression) {
parameterNames.add(((argument as NamedExpression)).name.label.name);
} else {
parameterCount++;
}
}
element = lookUpMethod(targetType.element, methodName2.name, parameterCount, new List.from(parameterNames));
} else if (target4 is SimpleIdentifier) {
Element targetElement = ((target4 as SimpleIdentifier)).element;
if (targetElement is PrefixElement) {
String name9 = "${((target4 as SimpleIdentifier)).name}.${methodName2}";
Identifier functionName = new Identifier_2(name9);
element = _resolver.nameScope.lookup(functionName, _resolver.definingLibrary);
} else {
return null;
}
} else {
return null;
}
}
ExecutableElement invokedMethod = null;
if (element is ExecutableElement) {
invokedMethod = (element as ExecutableElement);
} else if (element is FieldElement) {
} else {
return null;
}
if (invokedMethod == null) {
return null;
}
recordResolution(methodName2, invokedMethod);
return null;
}
Object visitPostfixExpression(PostfixExpression node) {
Token operator9 = node.operator;
if (operator9.isUserDefinableOperator()) {
Type2 operandType = getType(node.operand);
if (operandType == null) {
return null;
}
Element operandTypeElement = operandType.element;
String methodName;
if (identical(operator9.type, TokenType.PLUS_PLUS)) {
methodName = TokenType.PLUS.lexeme;
} else {
methodName = TokenType.MINUS.lexeme;
}
MethodElement member = lookUpMethod(operandTypeElement, methodName, 1, []);
if (member == null) {
_resolver.reportError2(ResolverErrorCode.CANNOT_BE_RESOLVED, operator9, [methodName]);
} else {
node.element = member;
}
}
return null;
}
Object visitPrefixedIdentifier(PrefixedIdentifier node) {
SimpleIdentifier prefix5 = node.prefix;
SimpleIdentifier identifier10 = node.identifier;
Element prefixElement = prefix5.element;
if (prefixElement is PrefixElement) {
Element element = _resolver.nameScope.lookup(node, _resolver.definingLibrary);
if (element == null) {
return null;
}
recordResolution(identifier10, element);
recordResolution(node, element);
return null;
}
if (prefixElement is ClassElement) {
Element memberElement;
if (node.identifier.inSetterContext()) {
memberElement = lookUpSetterInType((prefixElement as ClassElement), identifier10.name);
} else {
memberElement = lookUpGetterInType((prefixElement as ClassElement), identifier10.name);
}
if (memberElement == null) {
MethodElement methodElement = lookUpMethod(prefixElement, identifier10.name, -1, []);
if (methodElement != null) {
recordResolution(identifier10, methodElement);
recordResolution(node, methodElement);
return null;
}
}
if (memberElement == null) {
_resolver.reportError(ResolverErrorCode.CANNOT_BE_RESOLVED, identifier10, [identifier10.name]);
} else {
recordResolution(identifier10, memberElement);
recordResolution(node, memberElement);
}
return null;
}
Element variableType;
if (prefixElement is PropertyAccessorElement) {
PropertyAccessorElement accessor = (prefixElement as PropertyAccessorElement);
if (accessor.isGetter()) {
variableType = accessor.type.returnType.element;
} else {
variableType = accessor.type.normalParameterTypes[0].element;
}
} else if (prefixElement is VariableElement) {
variableType = ((prefixElement as VariableElement)).type.element;
} else {
return null;
}
PropertyAccessorElement memberElement;
if (node.identifier.inGetterContext()) {
memberElement = lookUpGetter(variableType, identifier10.name);
} else {
memberElement = lookUpSetter(variableType, identifier10.name);
}
if (memberElement == null) {
MethodElement methodElement = lookUpMethod(variableType, identifier10.name, -1, []);
if (methodElement != null) {
recordResolution(identifier10, methodElement);
recordResolution(node, methodElement);
return null;
}
}
if (memberElement == null) {
_resolver.reportError(ResolverErrorCode.CANNOT_BE_RESOLVED, identifier10, [identifier10.name]);
} else {
recordResolution(identifier10, memberElement);
recordResolution(node, memberElement);
}
return null;
}
Object visitPrefixExpression(PrefixExpression node) {
Token operator10 = node.operator;
TokenType operatorType = operator10.type;
if (operatorType.isUserDefinableOperator() || identical(operatorType, TokenType.PLUS_PLUS) || identical(operatorType, TokenType.MINUS_MINUS)) {
Type2 operandType = getType(node.operand);
if (operandType == null) {
return null;
}
Element operandTypeElement = operandType.element;
String methodName;
if (identical(operatorType, TokenType.PLUS_PLUS)) {
methodName = TokenType.PLUS.lexeme;
} else if (identical(operatorType, TokenType.MINUS_MINUS)) {
methodName = TokenType.MINUS.lexeme;
} else if (identical(operatorType, TokenType.MINUS)) {
methodName = "unary-";
} else {
methodName = operator10.lexeme;
}
MethodElement member = lookUpMethod(operandTypeElement, methodName, 1, []);
if (member == null) {
_resolver.reportError2(ResolverErrorCode.CANNOT_BE_RESOLVED, operator10, [methodName]);
} else {
node.element = member;
}
}
return null;
}
Object visitPropertyAccess(PropertyAccess node) {
Type2 targetType = getType(node.realTarget);
if (targetType is! InterfaceType) {
return null;
}
ClassElement targetElement = ((targetType as InterfaceType)).element;
SimpleIdentifier identifier = node.propertyName;
PropertyAccessorElement memberElement;
if (identifier.inSetterContext()) {
memberElement = lookUpSetter(targetElement, identifier.name);
} else {
memberElement = lookUpGetter(targetElement, identifier.name);
}
if (memberElement == null) {
MethodElement methodElement = lookUpMethod(targetElement, identifier.name, -1, []);
if (methodElement != null) {
recordResolution(identifier, methodElement);
return null;
}
}
if (memberElement == null) {
_resolver.reportError(ResolverErrorCode.CANNOT_BE_RESOLVED, identifier, [identifier.name]);
} else {
recordResolution(identifier, memberElement);
}
return null;
}
Object visitRedirectingConstructorInvocation(RedirectingConstructorInvocation node) {
ClassElement enclosingClass2 = _resolver.enclosingClass;
if (enclosingClass2 == null) {
return null;
}
SimpleIdentifier name = node.constructorName;
ConstructorElement element;
if (name == null) {
element = enclosingClass2.unnamedConstructor;
} else {
element = enclosingClass2.getNamedConstructor(name.name);
}
if (element == null) {
return null;
}
if (name != null) {
recordResolution(name, element);
}
node.element = element;
return null;
}
Object visitSimpleIdentifier(SimpleIdentifier node) {
if (node.element != null) {
return null;
}
Element element = _resolver.nameScope.lookup(node, _resolver.definingLibrary);
if (element == null) {
if (node.inGetterContext()) {
element = lookUpGetter(_resolver.enclosingClass, node.name);
} else {
element = lookUpSetter(_resolver.enclosingClass, node.name);
}
}
if (element == null) {
element = lookUpMethod(_resolver.enclosingClass, node.name, -1, []);
}
if (element == null) {
}
recordResolution(node, element);
return null;
}
Object visitSuperConstructorInvocation(SuperConstructorInvocation node) {
ClassElement enclosingClass3 = _resolver.enclosingClass;
if (enclosingClass3 == null) {
return null;
}
ClassElement superclass = getSuperclass(enclosingClass3);
if (superclass == null) {
return null;
}
SimpleIdentifier name = node.constructorName;
ConstructorElement element;
if (name == null) {
element = superclass.unnamedConstructor;
} else {
element = superclass.getNamedConstructor(name.name);
}
if (element == null) {
return null;
}
if (name != null) {
recordResolution(name, element);
}
node.element = element;
return null;
}
/**
* Return the element representing the superclass of the given class.
* @param targetClass the class whose superclass is to be returned
* @return the element representing the superclass of the given class
*/
ClassElement getSuperclass(ClassElement targetClass) {
InterfaceType superType = targetClass.supertype;
if (superType == null) {
return null;
}
return superType.element;
}
/**
* Return the type of the given expression that is to be used for type analysis.
* @param expression the expression whose type is to be returned
* @return the type of the given expression
*/
Type2 getType(Expression expression) => expression.staticType;
/**
* Look up the getter with the given name in the given type. Return the element representing the
* getter that was found, or {@code null} if there is no getter with the given name.
* @param element the element representing the type in which the getter is defined
* @param getterName the name of the getter being looked up
* @return the element representing the getter that was found
*/
PropertyAccessorElement lookUpGetter(Element element, String getterName) {
if (identical(element, DynamicTypeImpl.instance)) {
return null;
}
element = resolveTypeVariable(element);
if (element is ClassElement) {
ClassElement classElement = (element as ClassElement);
PropertyAccessorElement member = classElement.lookUpGetter(getterName, _resolver.definingLibrary);
if (member != null) {
return member;
}
return lookUpGetterInInterfaces((element as ClassElement), getterName, new Set<ClassElement>());
}
return null;
}
/**
* Look up the name of a getter in the interfaces implemented by the given type, either directly
* or indirectly. Return the element representing the getter that was found, or {@code null} if
* there is no getter with the given name.
* @param element the element representing the type in which the getter is defined
* @param memberName the name of the getter being looked up
* @param visitedInterfaces a set containing all of the interfaces that have been examined, used
* to prevent infinite recursion and to optimize the search
* @return the element representing the getter that was found
*/
PropertyAccessorElement lookUpGetterInInterfaces(ClassElement targetClass, String memberName, Set<ClassElement> visitedInterfaces) {
if (visitedInterfaces.contains(targetClass)) {
return null;
}
javaSetAdd(visitedInterfaces, targetClass);
PropertyAccessorElement member = lookUpGetterInType(targetClass, memberName);
if (member != null) {
return member;
}
for (InterfaceType interfaceType in targetClass.interfaces) {
member = lookUpGetterInInterfaces(interfaceType.element, memberName, visitedInterfaces);
if (member != null) {
return member;
}
}
ClassElement superclass = getSuperclass(targetClass);
if (superclass == null) {
return null;
}
return lookUpGetterInInterfaces(superclass, memberName, visitedInterfaces);
}
/**
* Look up the name of a getter in the given type. Return the element representing the getter that
* was found, or {@code null} if there is no getter with the given name.
* @param element the element representing the type in which the getter is defined
* @param memberName the name of the getter being looked up
* @return the element representing the getter that was found
*/
PropertyAccessorElement lookUpGetterInType(ClassElement element, String memberName) {
for (PropertyAccessorElement accessor in element.accessors) {
if (accessor.isGetter() && accessor.name == memberName) {
return accessor;
}
}
return null;
}
/**
* Find the element corresponding to the given label node in the current label scope.
* @param parentNode the node containing the given label
* @param labelNode the node representing the label being looked up
* @return the element corresponding to the given label node in the current scope
*/
LabelElementImpl lookupLabel(ASTNode parentNode, SimpleIdentifier labelNode) {
LabelScope labelScope2 = _resolver.labelScope;
LabelElementImpl labelElement = null;
if (labelNode == null) {
if (labelScope2 == null) {
} else {
labelElement = (labelScope2.lookup2(LabelScope.EMPTY_LABEL) as LabelElementImpl);
if (labelElement == null) {
}
}
} else {
if (labelScope2 == null) {
_resolver.reportError(ResolverErrorCode.UNDEFINED_LABEL, labelNode, [labelNode.name]);
} else {
labelElement = (labelScope2.lookup(labelNode) as LabelElementImpl);
if (labelElement == null) {
_resolver.reportError(ResolverErrorCode.UNDEFINED_LABEL, labelNode, [labelNode.name]);
} else {
recordResolution(labelNode, labelElement);
}
}
}
if (labelElement != null) {
ExecutableElement labelContainer = labelElement.getAncestor(ExecutableElement);
if (labelContainer != _resolver.enclosingFunction) {
if (labelNode == null) {
_resolver.reportError(ResolverErrorCode.LABEL_IN_OUTER_SCOPE, parentNode, [""]);
} else {
_resolver.reportError(ResolverErrorCode.LABEL_IN_OUTER_SCOPE, labelNode, [labelNode.name]);
}
labelElement = null;
}
}
return labelElement;
}
/**
* Look up the method with the given name in the given type. Return the element representing the
* method that was found, or {@code null} if there is no method with the given name.
* @param element the element representing the type in which the method is defined
* @param methodName the name of the method being looked up
* @return the element representing the method that was found
*/
MethodElement lookUpMethod(Element element, String methodName, int parameterCount, List<String> parameterNames) {
if (identical(element, DynamicTypeImpl.instance)) {
return null;
}
element = resolveTypeVariable(element);
if (element is ClassElement) {
ClassElement classElement = (element as ClassElement);
MethodElement member = classElement.lookUpMethod(methodName, _resolver.definingLibrary);
if (member != null) {
return member;
}
return lookUpMethodInInterfaces((element as ClassElement), methodName, new Set<ClassElement>());
}
return null;
}
/**
* Look up the name of a member in the interfaces implemented by the given type, either directly
* or indirectly. Return the element representing the member that was found, or {@code null} if
* there is no member with the given name.
* @param element the element representing the type in which the member is defined
* @param memberName the name of the member being looked up
* @param visitedInterfaces a set containing all of the interfaces that have been examined, used
* to prevent infinite recursion and to optimize the search
* @return the element representing the member that was found
*/
MethodElement lookUpMethodInInterfaces(ClassElement targetClass, String memberName, Set<ClassElement> visitedInterfaces) {
if (visitedInterfaces.contains(targetClass)) {
return null;
}
javaSetAdd(visitedInterfaces, targetClass);
MethodElement member = lookUpMethodInType(targetClass, memberName);
if (member != null) {
return member;
}
for (InterfaceType interfaceType in targetClass.interfaces) {
member = lookUpMethodInInterfaces(interfaceType.element, memberName, visitedInterfaces);
if (member != null) {
return member;
}
}
ClassElement superclass = getSuperclass(targetClass);
if (superclass == null) {
return null;
}
return lookUpMethodInInterfaces(superclass, memberName, visitedInterfaces);
}
/**
* Look up the name of a method in the given type. Return the element representing the method that
* was found, or {@code null} if there is no method with the given name.
* @param element the element representing the type in which the method is defined
* @param memberName the name of the method being looked up
* @return the element representing the method that was found
*/
MethodElement lookUpMethodInType(ClassElement element, String memberName) {
for (MethodElement method in element.methods) {
if (method.name == memberName) {
return method;
}
}
return null;
}
/**
* Look up the setter with the given name in the given type. Return the element representing the
* setter that was found, or {@code null} if there is no setter with the given name.
* @param element the element representing the type in which the setter is defined
* @param setterName the name of the setter being looked up
* @return the element representing the setter that was found
*/
PropertyAccessorElement lookUpSetter(Element element, String setterName) {
if (identical(element, DynamicTypeImpl.instance)) {
return null;
}
element = resolveTypeVariable(element);
if (element is ClassElement) {
ClassElement classElement = (element as ClassElement);
PropertyAccessorElement member = classElement.lookUpSetter(setterName, _resolver.definingLibrary);
if (member != null) {
return member;
}
return lookUpSetterInInterfaces((element as ClassElement), setterName, new Set<ClassElement>());
}
return null;
}
/**
* Look up the name of a setter in the interfaces implemented by the given type, either directly
* or indirectly. Return the element representing the setter that was found, or {@code null} if
* there is no setter with the given name.
* @param element the element representing the type in which the setter is defined
* @param memberName the name of the setter being looked up
* @param visitedInterfaces a set containing all of the interfaces that have been examined, used
* to prevent infinite recursion and to optimize the search
* @return the element representing the setter that was found
*/
PropertyAccessorElement lookUpSetterInInterfaces(ClassElement targetClass, String memberName, Set<ClassElement> visitedInterfaces) {
if (visitedInterfaces.contains(targetClass)) {
return null;
}
javaSetAdd(visitedInterfaces, targetClass);
PropertyAccessorElement member = lookUpSetterInType(targetClass, memberName);
if (member != null) {
return member;
}
for (InterfaceType interfaceType in targetClass.interfaces) {
member = lookUpSetterInInterfaces(interfaceType.element, memberName, visitedInterfaces);
if (member != null) {
return member;
}
}
ClassElement superclass = getSuperclass(targetClass);
if (superclass == null) {
return null;
}
return lookUpSetterInInterfaces(superclass, memberName, visitedInterfaces);
}
/**
* Look up the name of a setter in the given type. Return the element representing the setter that
* was found, or {@code null} if there is no setter with the given name.
* @param element the element representing the type in which the setter is defined
* @param memberName the name of the setter being looked up
* @return the element representing the setter that was found
*/
PropertyAccessorElement lookUpSetterInType(ClassElement element, String memberName) {
for (PropertyAccessorElement accessor in element.accessors) {
if (accessor.isSetter() && accessor.name == memberName) {
return accessor;
}
}
return null;
}
/**
* Return the binary operator that is invoked by the given compound assignment operator.
* @param operator the assignment operator being mapped
* @return the binary operator that invoked by the given assignment operator
*/
TokenType operatorFromCompoundAssignment(TokenType operator) {
if (operator == TokenType.AMPERSAND_EQ) {
return TokenType.AMPERSAND;
} else if (operator == TokenType.BAR_EQ) {
return TokenType.BAR;
} else if (operator == TokenType.CARET_EQ) {
return TokenType.CARET;
} else if (operator == TokenType.GT_GT_EQ) {
return TokenType.GT_GT;
} else if (operator == TokenType.LT_LT_EQ) {
return TokenType.LT_LT;
} else if (operator == TokenType.MINUS_EQ) {
return TokenType.MINUS;
} else if (operator == TokenType.PERCENT_EQ) {
return TokenType.PERCENT;
} else if (operator == TokenType.PLUS_EQ) {
return TokenType.PLUS;
} else if (operator == TokenType.SLASH_EQ) {
return TokenType.SLASH;
} else if (operator == TokenType.STAR_EQ) {
return TokenType.STAR;
} else if (operator == TokenType.TILDE_SLASH_EQ) {
return TokenType.TILDE_SLASH;
}
AnalysisEngine.instance.logger.logError("Failed to map ${operator.lexeme} to it's corresponding operator");
return operator;
}
/**
* Record the fact that the given AST node was resolved to the given element.
* @param node the AST node that was resolved
* @param element the element to which the AST node was resolved
*/
void recordResolution(Identifier node, Element element39) {
if (element39 != null) {
node.element = element39;
}
}
/**
* If the given element is a type variable, resolve it to the class that should be used when
* looking up members. Otherwise, return the original element.
* @param element the element that is to be resolved if it is a type variable
* @return the class that should be used in place of the argument if it is a type variable, or the
* original argument if it isn't a type variable
*/
Element resolveTypeVariable(Element element40) {
if (element40 is TypeVariableElement) {
Type2 bound3 = ((element40 as TypeVariableElement)).bound;
if (bound3 == null) {
return _resolver.typeProvider.objectType.element;
}
return bound3.element;
}
return element40;
}
}
class Identifier_2 extends Identifier {
String name9;
Identifier_2(this.name9) : super();
accept(ASTVisitor visitor) => null;
Token get beginToken => null;
Token get endToken => null;
String get name => name9;
void visitChildren(ASTVisitor<Object> visitor) {
}
}
/**
* Instances of the class {@code Library} represent the data about a single library during the
* resolution of some (possibly different) library. They are not intended to be used except during
* the resolution process.
*/
class Library {
/**
* The analysis context in which this library is being analyzed.
*/
AnalysisContextImpl _analysisContext;
/**
* The listener to which analysis errors will be reported.
*/
AnalysisErrorListener _errorListener;
/**
* The source specifying the defining compilation unit of this library.
*/
Source _librarySource;
/**
* The library element representing this library.
*/
LibraryElementImpl _libraryElement;
/**
* A list containing all of the libraries that are imported into this library.
*/
Map<ImportDirective, Library> _importedLibraries = new Map<ImportDirective, Library>();
/**
* A flag indicating whether this library explicitly imports core.
*/
bool _explicitlyImportsCore = false;
/**
* A list containing all of the libraries that are exported from this library.
*/
Map<ExportDirective, Library> _exportedLibraries = new Map<ExportDirective, Library>();
/**
* A table mapping the sources for the compilation units in this library to their corresponding
* AST structures.
*/
Map<Source, CompilationUnit> _astMap = new Map<Source, CompilationUnit>();
/**
* The library scope used when resolving elements within this library's compilation units.
*/
LibraryScope _libraryScope;
/**
* Initialize a newly created data holder that can maintain the data associated with a library.
* @param analysisContext the analysis context in which this library is being analyzed
* @param errorListener the listener to which analysis errors will be reported
* @param librarySource the source specifying the defining compilation unit of this library
*/
Library(AnalysisContextImpl analysisContext, AnalysisErrorListener errorListener, Source librarySource) {
this._analysisContext = analysisContext;
this._errorListener = errorListener;
this._librarySource = librarySource;
this._libraryElement = (analysisContext.getLibraryElementOrNull(librarySource) as LibraryElementImpl);
}
/**
* Record that the given library is exported from this library.
* @param importLibrary the library that is exported from this library
*/
void addExport(ExportDirective directive, Library exportLibrary) {
_exportedLibraries[directive] = exportLibrary;
}
/**
* Record that the given library is imported into this library.
* @param importLibrary the library that is imported into this library
*/
void addImport(ImportDirective directive, Library importLibrary) {
_importedLibraries[directive] = importLibrary;
}
/**
* Return the AST structure associated with the given source.
* @param source the source representing the compilation unit whose AST is to be returned
* @return the AST structure associated with the given source
* @throws AnalysisException if an AST structure could not be created for the compilation unit
*/
CompilationUnit getAST(Source source) {
CompilationUnit unit = _astMap[source];
if (unit == null) {
unit = _analysisContext.parse2(source, _errorListener);
_astMap[source] = unit;
}
return unit;
}
/**
* Return a collection containing the sources for the compilation units in this library.
* @return the sources for the compilation units in this library
*/
Set<Source> get compilationUnitSources => _astMap.keys.toSet();
/**
* Return the AST structure associated with the defining compilation unit for this library.
* @return the AST structure associated with the defining compilation unit for this library
* @throws AnalysisException if an AST structure could not be created for the defining compilation
* unit
*/
CompilationUnit get definingCompilationUnit => getAST(librarySource);
/**
* Return {@code true} if this library explicitly imports core.
* @return {@code true} if this library explicitly imports core
*/
bool get explicitlyImportsCore => _explicitlyImportsCore;
/**
* Return the library exported by the given directive.
* @param directive the directive that exports the library to be returned
* @return the library exported by the given directive
*/
Library getExport(ExportDirective directive) => _exportedLibraries[directive];
/**
* Return an array containing the libraries that are exported from this library.
* @return an array containing the libraries that are exported from this library
*/
List<Library> get exports {
Set<Library> libraries = new Set<Library>();
libraries.addAll(_exportedLibraries.values);
return new List.from(libraries);
}
/**
* Return the library imported by the given directive.
* @param directive the directive that imports the library to be returned
* @return the library imported by the given directive
*/
Library getImport(ImportDirective directive) => _importedLibraries[directive];
/**
* Return an array containing the libraries that are imported into this library.
* @return an array containing the libraries that are imported into this library
*/
List<Library> get imports {
Set<Library> libraries = new Set<Library>();
libraries.addAll(_importedLibraries.values);
return new List.from(libraries);
}
/**
* Return an array containing the libraries that are either imported or exported from this
* library.
* @return the libraries that are either imported or exported from this library
*/
List<Library> get importsAndExports {
Set<Library> libraries = new Set<Library>();
libraries.addAll(_importedLibraries.values);
libraries.addAll(_exportedLibraries.values);
return new List.from(libraries);
}
/**
* Return the library element representing this library, creating it if necessary.
* @return the library element representing this library
*/
LibraryElementImpl get libraryElement {
if (_libraryElement == null) {
_libraryElement = (_analysisContext.getLibraryElement(_librarySource) as LibraryElementImpl);
}
return _libraryElement;
}
/**
* Return the library scope used when resolving elements within this library's compilation units.
* @return the library scope used when resolving elements within this library's compilation units
*/
LibraryScope get libraryScope {
if (_libraryScope == null) {
_libraryScope = new LibraryScope(_libraryElement, _errorListener);
}
return _libraryScope;
}
/**
* Return the source specifying the defining compilation unit of this library.
* @return the source specifying the defining compilation unit of this library
*/
Source get librarySource => _librarySource;
/**
* Return the result of resolving the given URI against the URI of the library, or {@code null} if
* the URI is not valid. If the URI is not valid, report the error.
* @param uriLiteral the string literal specifying the URI to be resolved
* @return the result of resolving the given URI against the URI of the library
*/
Source getSource(StringLiteral uriLiteral) => getSource2(getStringValue(uriLiteral), uriLiteral.offset, uriLiteral.length);
/**
* Set whether this library explicitly imports core to match the given value.
* @param explicitlyImportsCore {@code true} if this library explicitly imports core
*/
void set explicitlyImportsCore(bool explicitlyImportsCore2) {
this._explicitlyImportsCore = explicitlyImportsCore2;
}
/**
* Set the library element representing this library to the given library element.
* @param libraryElement the library element representing this library
*/
void set libraryElement(LibraryElementImpl libraryElement2) {
this._libraryElement = libraryElement2;
}
String toString() => _librarySource.shortName;
/**
* Append the value of the given string literal to the given string builder.
* @param builder the builder to which the string's value is to be appended
* @param literal the string literal whose value is to be appended to the builder
* @throws IllegalArgumentException if the string is not a constant string without any string
* interpolation
*/
void appendStringValue(StringBuffer builder, StringLiteral literal) {
if (literal is SimpleStringLiteral) {
builder.add(((literal as SimpleStringLiteral)).value);
} else if (literal is AdjacentStrings) {
for (StringLiteral stringLiteral in ((literal as AdjacentStrings)).strings) {
appendStringValue(builder, stringLiteral);
}
} else {
throw new IllegalArgumentException();
}
}
/**
* Return the result of resolving the given URI against the URI of the library, or {@code null} if
* the URI is not valid. If the URI is not valid, report the error.
* @param uri the URI to be resolved
* @param uriOffset the offset of the string literal representing the URI
* @param uriLength the length of the string literal representing the URI
* @return the result of resolving the given URI against the URI of the library
*/
Source getSource2(String uri, int uriOffset, int uriLength) {
if (uri == null) {
_errorListener.onError(new AnalysisError.con2(_librarySource, uriOffset, uriLength, ResolverErrorCode.INVALID_URI, []));
return null;
}
return _librarySource.resolve(uri);
}
/**
* Return the value of the given string literal, or {@code null} if the string is not a constant
* string without any string interpolation.
* @param literal the string literal whose value is to be returned
* @return the value of the given string literal
*/
String getStringValue(StringLiteral literal) {
StringBuffer builder = new StringBuffer();
try {
appendStringValue(builder, literal);
} on IllegalArgumentException catch (exception) {
return null;
}
return builder.toString();
}
}
/**
* Instances of the class {@code LibraryElementBuilder} build an element model for a single library.
*/
class LibraryElementBuilder {
/**
* The analysis context in which the element model will be built.
*/
AnalysisContextImpl _analysisContext;
/**
* The listener to which errors will be reported.
*/
AnalysisErrorListener _errorListener;
/**
* The name of the core library.
*/
static String CORE_LIBRARY_URI = "dart:core";
/**
* The name of the function used as an entry point.
*/
static String _ENTRY_POINT_NAME = "main";
/**
* Initialize a newly created library element builder.
* @param resolver the resolver for which the element model is being built
*/
LibraryElementBuilder(LibraryResolver resolver) {
this._analysisContext = resolver.analysisContext;
this._errorListener = resolver.errorListener;
}
/**
* Build the library element for the given library.
* @param library the library for which an element model is to be built
* @return the library element that was built
* @throws AnalysisException if the analysis could not be performed
*/
LibraryElementImpl buildLibrary(Library library) {
CompilationUnitBuilder builder = new CompilationUnitBuilder(_analysisContext, _errorListener);
Source librarySource2 = library.librarySource;
CompilationUnit definingCompilationUnit3 = library.definingCompilationUnit;
CompilationUnitElementImpl definingCompilationUnitElement = builder.buildCompilationUnit2(librarySource2, definingCompilationUnit3);
NodeList<Directive> directives3 = definingCompilationUnit3.directives;
LibraryIdentifier libraryNameNode = null;
bool hasPartDirective = false;
FunctionElement entryPoint = findEntryPoint(definingCompilationUnitElement);
List<ImportElement> imports = new List<ImportElement>();
List<ExportElement> exports = new List<ExportElement>();
List<Directive> directivesToResolve = new List<Directive>();
List<CompilationUnitElementImpl> sourcedCompilationUnits = new List<CompilationUnitElementImpl>();
for (Directive directive in directives3) {
if (directive is LibraryDirective) {
if (libraryNameNode == null) {
libraryNameNode = ((directive as LibraryDirective)).name;
directivesToResolve.add(directive);
}
} else if (directive is PartDirective) {
hasPartDirective = true;
StringLiteral partUri = ((directive as PartDirective)).uri;
Source partSource = library.getSource(partUri);
if (partSource != null) {
CompilationUnitElementImpl part = builder.buildCompilationUnit(partSource);
String partLibraryName = getPartLibraryName(library, partSource, directivesToResolve);
if (partLibraryName == null) {
_errorListener.onError(new AnalysisError.con2(librarySource2, partUri.offset, partUri.length, ResolverErrorCode.MISSING_PART_OF_DIRECTIVE, []));
} else if (libraryNameNode == null) {
} else if (libraryNameNode.name != partLibraryName) {
_errorListener.onError(new AnalysisError.con2(librarySource2, partUri.offset, partUri.length, ResolverErrorCode.PART_WITH_WRONG_LIBRARY_NAME, [partLibraryName]));
}
if (entryPoint == null) {
entryPoint = findEntryPoint(part);
}
directive.element = part;
sourcedCompilationUnits.add(part);
}
}
}
if (hasPartDirective && libraryNameNode == null) {
_errorListener.onError(new AnalysisError.con1(librarySource2, ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART, []));
}
LibraryElementImpl libraryElement = new LibraryElementImpl(_analysisContext, libraryNameNode);
libraryElement.definingCompilationUnit = definingCompilationUnitElement;
if (entryPoint != null) {
libraryElement.entryPoint = entryPoint;
}
libraryElement.imports = new List.from(imports);
libraryElement.exports = new List.from(exports);
libraryElement.parts = new List.from(sourcedCompilationUnits);
for (Directive directive in directivesToResolve) {
directive.element = libraryElement;
}
library.libraryElement = libraryElement;
return libraryElement;
}
/**
* Search the top-level functions defined in the given compilation unit for the entry point.
* @param element the compilation unit to be searched
* @return the entry point that was found, or {@code null} if the compilation unit does not define
* an entry point
*/
FunctionElement findEntryPoint(CompilationUnitElementImpl element) {
for (FunctionElement function in element.functions) {
if (function.name == _ENTRY_POINT_NAME) {
return function;
}
}
return null;
}
/**
* Return the name of the library that the given part is declared to be a part of, or {@code null}if the part does not contain a part-of directive.
* @param library the library containing the part
* @param partSource the source representing the part
* @param directivesToResolve a list of directives that should be resolved to the library being
* built
* @return the name of the library that the given part is declared to be a part of
*/
String getPartLibraryName(Library library, Source partSource, List<Directive> directivesToResolve) {
try {
CompilationUnit partUnit = library.getAST(partSource);
for (Directive directive in partUnit.directives) {
if (directive is PartOfDirective) {
directivesToResolve.add(directive);
LibraryIdentifier libraryName3 = ((directive as PartOfDirective)).libraryName;
if (libraryName3 != null) {
return libraryName3.name;
}
}
}
} on AnalysisException catch (exception) {
}
return null;
}
}
/**
* Instances of the class {@code LibraryResolver} are used to resolve one or more mutually dependent
* libraries within a single context.
*/
class LibraryResolver {
/**
* The analysis context in which the libraries are being analyzed.
*/
AnalysisContextImpl _analysisContext;
/**
* The listener to which analysis errors will be reported.
*/
AnalysisErrorListener _errorListener;
/**
* A source object representing the core library (dart:core).
*/
Source _coreLibrarySource;
/**
* The object representing the core library.
*/
Library _coreLibrary;
/**
* The object used to access the types from the core library.
*/
TypeProvider _typeProvider;
/**
* A table mapping library sources to the information being maintained for those libraries.
*/
Map<Source, Library> _libraryMap = new Map<Source, Library>();
/**
* A collection containing the libraries that are being resolved together.
*/
Set<Library> _librariesInCycles;
/**
* Initialize a newly created library resolver to resolve libraries within the given context.
* @param analysisContext the analysis context in which the library is being analyzed
* @param errorListener the listener to which analysis errors will be reported
*/
LibraryResolver(AnalysisContextImpl analysisContext, AnalysisErrorListener errorListener) {
this._analysisContext = analysisContext;
this._errorListener = errorListener;
_coreLibrarySource = analysisContext.sourceFactory.forUri(LibraryElementBuilder.CORE_LIBRARY_URI);
}
/**
* Return the analysis context in which the libraries are being analyzed.
* @return the analysis context in which the libraries are being analyzed
*/
AnalysisContextImpl get analysisContext => _analysisContext;
/**
* Return the listener to which analysis errors will be reported.
* @return the listener to which analysis errors will be reported
*/
AnalysisErrorListener get errorListener => _errorListener;
/**
* Resolve the library specified by the given source in the given context.
* <p>
* Note that because Dart allows circular imports between libraries, it is possible that more than
* one library will need to be resolved. In such cases the error listener can receive errors from
* multiple libraries.
* @param librarySource the source specifying the defining compilation unit of the library to be
* resolved
* @param fullAnalysis {@code true} if a full analysis should be performed
* @return the element representing the resolved library
* @throws AnalysisException if the library could not be resolved for some reason
*/
LibraryElement resolveLibrary(Source librarySource, bool fullAnalysis) {
Library targetLibrary = createLibrary(librarySource);
_coreLibrary = _libraryMap[_coreLibrarySource];
if (_coreLibrary == null) {
_coreLibrary = createLibrary(_coreLibrarySource);
}
computeLibraryDependencies(targetLibrary);
_librariesInCycles = computeLibrariesInCycles(targetLibrary);
buildElementModels();
buildDirectiveModels();
_typeProvider = new TypeProviderImpl(_coreLibrary.libraryElement);
buildTypeHierarchies();
resolveReferencesAndTypes();
if (fullAnalysis) {
}
recordLibraryElements();
return targetLibrary.libraryElement;
}
/**
* Add a dependency to the given map from the referencing library to the referenced library.
* @param dependencyMap the map to which the dependency is to be added
* @param referencingLibrary the library that references the referenced library
* @param referencedLibrary the library referenced by the referencing library
*/
void addDependencyToMap(Map<Library, List<Library>> dependencyMap, Library referencingLibrary, Library referencedLibrary) {
List<Library> dependentLibraries = dependencyMap[referencedLibrary];
if (dependentLibraries == null) {
dependentLibraries = new List<Library>();
dependencyMap[referencedLibrary] = dependentLibraries;
}
dependentLibraries.add(referencingLibrary);
}
/**
* Given a library that is part of a cycle that includes the root library, add to the given set of
* libraries all of the libraries reachable from the root library that are also included in the
* cycle.
* @param library the library to be added to the collection of libraries in cycles
* @param librariesInCycle a collection of the libraries that are in the cycle
* @param dependencyMap a table mapping libraries to the collection of libraries from which those
* libraries are referenced
*/
void addLibrariesInCycle(Library library, Set<Library> librariesInCycle, Map<Library, List<Library>> dependencyMap) {
if (javaSetAdd(librariesInCycle, library)) {
List<Library> dependentLibraries = dependencyMap[library];
if (dependentLibraries != null) {
for (Library dependentLibrary in dependentLibraries) {
addLibrariesInCycle(dependentLibrary, librariesInCycle, dependencyMap);
}
}
}
}
/**
* Add the given library, and all libraries reachable from it that have not already been visited,
* to the given dependency map.
* @param library the library currently being added to the dependency map
* @param dependencyMap the dependency map being computed
* @param visitedLibraries the libraries that have already been visited, used to prevent infinite
* recursion
*/
void addToDependencyMap(Library library, Map<Library, List<Library>> dependencyMap, Set<Library> visitedLibraries) {
if (javaSetAdd(visitedLibraries, library)) {
for (Library referencedLibrary in library.importsAndExports) {
addDependencyToMap(dependencyMap, library, referencedLibrary);
addToDependencyMap(referencedLibrary, dependencyMap, visitedLibraries);
}
if (!library.explicitlyImportsCore && library != _coreLibrary) {
addDependencyToMap(dependencyMap, library, _coreLibrary);
}
}
}
/**
* Build the element model representing the combinators declared by the given directive.
* @param directive the directive that declares the combinators
* @return an array containing the import combinators that were built
*/
List<NamespaceCombinator> buildCombinators(NamespaceDirective directive) {
List<NamespaceCombinator> combinators = new List<NamespaceCombinator>();
for (Combinator combinator in directive.combinators) {
if (combinator is HideCombinator) {
HideCombinatorImpl hide = new HideCombinatorImpl();
hide.hiddenNames = getIdentifiers(((combinator as HideCombinator)).hiddenNames);
combinators.add(hide);
} else {
ShowCombinatorImpl show = new ShowCombinatorImpl();
show.shownNames = getIdentifiers(((combinator as ShowCombinator)).shownNames);
combinators.add(show);
}
}
return new List.from(combinators);
}
/**
* Every library now has a corresponding {@link LibraryElement}, so it is now possible to resolve
* the import and export directives.
* @throws AnalysisException if the defining compilation unit for any of the libraries could not
* be accessed
*/
void buildDirectiveModels() {
for (Library library in _librariesInCycles) {
Map<String, PrefixElementImpl> nameToPrefixMap = new Map<String, PrefixElementImpl>();
List<ImportElement> imports = new List<ImportElement>();
List<ExportElement> exports = new List<ExportElement>();
for (Directive directive in library.definingCompilationUnit.directives) {
if (directive is ImportDirective) {
ImportDirective importDirective = (directive as ImportDirective);
Library importedLibrary = library.getImport(importDirective);
ImportElementImpl importElement = new ImportElementImpl();
importElement.combinators = buildCombinators(importDirective);
LibraryElement importedLibraryElement = importedLibrary.libraryElement;
if (importedLibraryElement != null) {
importElement.importedLibrary = importedLibraryElement;
directive.element = importedLibraryElement;
}
SimpleIdentifier prefixNode = ((directive as ImportDirective)).prefix;
if (prefixNode != null) {
String prefixName = prefixNode.name;
PrefixElementImpl prefix = nameToPrefixMap[prefixName];
if (prefix == null) {
prefix = new PrefixElementImpl(prefixNode);
nameToPrefixMap[prefixName] = prefix;
}
importElement.prefix = prefix;
}
imports.add(importElement);
} else if (directive is ExportDirective) {
ExportDirective exportDirective = (directive as ExportDirective);
ExportElementImpl exportElement = new ExportElementImpl();
exportElement.combinators = buildCombinators(exportDirective);
LibraryElement exportedLibrary = library.getExport(exportDirective).libraryElement;
if (exportedLibrary != null) {
exportElement.exportedLibrary = exportedLibrary;
directive.element = exportedLibrary;
}
exports.add(exportElement);
}
}
Source librarySource3 = library.librarySource;
if (!library.explicitlyImportsCore && _coreLibrarySource != librarySource3) {
ImportElementImpl importElement = new ImportElementImpl();
importElement.importedLibrary = _coreLibrary.libraryElement;
importElement.synthetic = true;
imports.add(importElement);
}
LibraryElementImpl libraryElement3 = library.libraryElement;
libraryElement3.imports = new List.from(imports);
libraryElement3.exports = new List.from(exports);
}
}
/**
* Build element models for all of the libraries in the current cycle.
* @throws AnalysisException if any of the element models cannot be built
*/
void buildElementModels() {
for (Library library in _librariesInCycles) {
LibraryElementBuilder builder = new LibraryElementBuilder(this);
LibraryElementImpl libraryElement = builder.buildLibrary(library);
library.libraryElement = libraryElement;
}
}
/**
* Resolve the type hierarchy across all of the types declared in the libraries in the current
* cycle.
* @throws AnalysisException if any of the type hierarchies could not be resolved
*/
void buildTypeHierarchies() {
for (Library library in _librariesInCycles) {
for (Source source in library.compilationUnitSources) {
TypeResolverVisitor visitor = new TypeResolverVisitor(library, source, _typeProvider);
library.getAST(source).accept(visitor);
}
}
}
/**
* Compute a dependency map of libraries reachable from the given library. A dependency map is a
* table that maps individual libraries to a list of the libraries that either import or export
* those libraries.
* <p>
* This map is used to compute all of the libraries involved in a cycle that include the root
* library. Given that we only add libraries that are reachable from the root library, when we
* work backward we are guaranteed to only get libraries in the cycle.
* @param library the library currently being added to the dependency map
*/
Map<Library, List<Library>> computeDependencyMap(Library library) {
Map<Library, List<Library>> dependencyMap = new Map<Library, List<Library>>();
addToDependencyMap(library, dependencyMap, new Set<Library>());
return dependencyMap;
}
/**
* Return a collection containing all of the libraries reachable from the given library that are
* contained in a cycle that includes the given library.
* @param library the library that must be included in any cycles whose members are to be returned
* @return all of the libraries referenced by the given library that have a circular reference
* back to the given library
*/
Set<Library> computeLibrariesInCycles(Library library) {
Map<Library, List<Library>> dependencyMap = computeDependencyMap(library);
Set<Library> librariesInCycle = new Set<Library>();
addLibrariesInCycle(library, librariesInCycle, dependencyMap);
return librariesInCycle;
}
/**
* Recursively traverse the libraries reachable from the given library, creating instances of the
* class {@link Library} to represent them, and record the references in the library objects.
* @param library the library to be processed to find libaries that have not yet been traversed
* @throws AnalysisException if some portion of the library graph could not be traversed
*/
void computeLibraryDependencies(Library library) {
bool explicitlyImportsCore = false;
CompilationUnit unit = library.definingCompilationUnit;
for (Directive directive in unit.directives) {
if (directive is ImportDirective) {
ImportDirective importDirective = (directive as ImportDirective);
Source importedSource = library.getSource(importDirective.uri);
if (importedSource == _coreLibrarySource) {
explicitlyImportsCore = true;
}
Library importedLibrary = _libraryMap[importedSource];
if (importedLibrary == null) {
importedLibrary = createLibrary(importedSource);
computeLibraryDependencies(importedLibrary);
}
library.addImport(importDirective, importedLibrary);
} else if (directive is ExportDirective) {
ExportDirective exportDirective = (directive as ExportDirective);
Source exportedSource = library.getSource(exportDirective.uri);
Library exportedLibrary = _libraryMap[exportedSource];
if (exportedLibrary == null) {
exportedLibrary = createLibrary(exportedSource);
computeLibraryDependencies(exportedLibrary);
}
library.addExport(exportDirective, exportedLibrary);
}
}
library.explicitlyImportsCore = explicitlyImportsCore;
if (!explicitlyImportsCore && _coreLibrarySource != library.librarySource) {
Library importedLibrary = _libraryMap[_coreLibrarySource];
if (importedLibrary == null) {
importedLibrary = createLibrary(_coreLibrarySource);
computeLibraryDependencies(importedLibrary);
}
}
}
/**
* Create an object to represent the information about the library defined by the compilation unit
* with the given source.
* @param librarySource the source of the library's defining compilation unit
* @return the library object that was created
*/
Library createLibrary(Source librarySource) {
Library library = new Library(_analysisContext, _errorListener, librarySource);
_libraryMap[librarySource] = library;
return library;
}
/**
* Return an array containing the lexical identifiers associated with the nodes in the given list.
* @param names the AST nodes representing the identifiers
* @return the lexical identifiers associated with the nodes in the list
*/
List<String> getIdentifiers(NodeList<SimpleIdentifier> names) {
int count = names.length;
List<String> identifiers = new List<String>.fixedLength(count);
for (int i = 0; i < count; i++) {
identifiers[i] = names[i].name;
}
return identifiers;
}
/**
* As the final step in the process, record the resolved element models with the analysis context.
*/
void recordLibraryElements() {
Map<Source, LibraryElement> elementMap = new Map<Source, LibraryElement>();
for (Library library in _librariesInCycles) {
elementMap[library.librarySource] = library.libraryElement;
}
_analysisContext.recordLibraryElements(elementMap);
}
/**
* Resolve the identifiers and perform type analysis in the libraries in the current cycle.
* @throws AnalysisException if any of the identifiers could not be resolved or if any of the
* libraries could not have their types analyzed
*/
void resolveReferencesAndTypes() {
for (Library library in _librariesInCycles) {
resolveReferencesAndTypes2(library);
}
}
/**
* Resolve the identifiers and perform type analysis in the given library.
* @param library the library to be resolved
* @throws AnalysisException if any of the identifiers could not be resolved or if the types in
* the library cannot be analyzed
*/
void resolveReferencesAndTypes2(Library library) {
for (Source source in library.compilationUnitSources) {
ResolverVisitor visitor = new ResolverVisitor(library, source, _typeProvider);
library.getAST(source).accept(visitor);
}
}
}
/**
* Instances of the class {@code ResolverVisitor} are used to resolve the nodes within a single
* compilation unit.
*/
class ResolverVisitor extends ScopedVisitor {
/**
* The object used to resolve the element associated with the current node.
*/
ElementResolver _elementResolver;
/**
* The object used to compute the type associated with the current node.
*/
StaticTypeAnalyzer _typeAnalyzer;
/**
* The class element representing the class containing the current node, or {@code null} if the
* current node is not contained in a class.
*/
ClassElement _enclosingClass = null;
/**
* The element representing the function containing the current node, or {@code null} if the
* current node is not contained in a function.
*/
ExecutableElement _enclosingFunction = null;
/**
* Initialize a newly created visitor to resolve the nodes in a compilation unit.
* @param library the library containing the compilation unit being resolved
* @param source the source representing the compilation unit being visited
* @param typeProvider the object used to access the types from the core library
*/
ResolverVisitor(Library library, Source source, TypeProvider typeProvider) : super(library, source, typeProvider) {
this._elementResolver = new ElementResolver(this);
this._typeAnalyzer = new StaticTypeAnalyzer(this);
}
Object visitClassDeclaration(ClassDeclaration node) {
ClassElement outerType = _enclosingClass;
try {
_enclosingClass = node.element;
_typeAnalyzer.thisType = _enclosingClass == null ? null : _enclosingClass.type;
super.visitClassDeclaration(node);
} finally {
_typeAnalyzer.thisType = outerType == null ? null : outerType.type;
_enclosingClass = outerType;
}
return null;
}
Object visitFunctionDeclaration(FunctionDeclaration node) {
ExecutableElement outerFunction = _enclosingFunction;
try {
SimpleIdentifier functionName = node.name;
_enclosingFunction = (functionName.element as ExecutableElement);
super.visitFunctionDeclaration(node);
} finally {
_enclosingFunction = outerFunction;
}
return null;
}
Object visitFunctionExpression(FunctionExpression node) {
ExecutableElement outerFunction = _enclosingFunction;
try {
_enclosingFunction = node.element;
super.visitFunctionExpression(node);
} finally {
_enclosingFunction = outerFunction;
}
return null;
}
Object visitLibraryIdentifier(LibraryIdentifier node) => null;
Object visitMethodDeclaration(MethodDeclaration node) {
ExecutableElement outerFunction = _enclosingFunction;
try {
_enclosingFunction = node.element;
super.visitMethodDeclaration(node);
} finally {
_enclosingFunction = outerFunction;
}
return null;
}
Object visitNode(ASTNode node) {
node.visitChildren(this);
node.accept(_elementResolver);
node.accept(_typeAnalyzer);
return null;
}
Object visitPrefixedIdentifier(PrefixedIdentifier node) {
SimpleIdentifier prefix6 = node.prefix;
if (prefix6 != null) {
prefix6.accept(this);
}
node.accept(_elementResolver);
node.accept(_typeAnalyzer);
return null;
}
Object visitPropertyAccess(PropertyAccess node) {
Expression target5 = node.target;
if (target5 != null) {
target5.accept(this);
}
node.accept(_elementResolver);
node.accept(_typeAnalyzer);
return null;
}
Object visitRedirectingConstructorInvocation(RedirectingConstructorInvocation node) {
ArgumentList argumentList11 = node.argumentList;
if (argumentList11 != null) {
argumentList11.accept(this);
}
node.accept(_elementResolver);
node.accept(_typeAnalyzer);
return null;
}
Object visitSuperConstructorInvocation(SuperConstructorInvocation node) {
ArgumentList argumentList12 = node.argumentList;
if (argumentList12 != null) {
argumentList12.accept(this);
}
node.accept(_elementResolver);
node.accept(_typeAnalyzer);
return null;
}
Object visitTypeName(TypeName node) => null;
/**
* Return the class element representing the class containing the current node, or {@code null} if
* the current node is not contained in a class.
* @return the class element representing the class containing the current node
*/
ClassElement get enclosingClass => _enclosingClass;
/**
* Return the element representing the function containing the current node, or {@code null} if
* the current node is not contained in a function.
* @return the element representing the function containing the current node
*/
ExecutableElement get enclosingFunction => _enclosingFunction;
}
/**
* The abstract class {@code ScopedVisitor} maintains name and label scopes as an AST structure is
* being visited.
*/
abstract class ScopedVisitor extends GeneralizingASTVisitor<Object> {
/**
* The element for the library containing the compilation unit being visited.
*/
LibraryElement _definingLibrary;
/**
* The source representing the compilation unit being visited.
*/
Source _source;
/**
* The error listener that will be informed of any errors that are found during resolution.
*/
AnalysisErrorListener _errorListener;
/**
* The scope used to resolve identifiers.
*/
Scope _nameScope;
/**
* The object used to access the types from the core library.
*/
TypeProvider _typeProvider;
/**
* The scope used to resolve labels for {@code break} and {@code continue} statements, or{@code null} if no labels have been defined in the current context.
*/
LabelScope _labelScope;
/**
* Initialize a newly created visitor to resolve the nodes in a compilation unit.
* @param library the library containing the compilation unit being resolved
* @param source the source representing the compilation unit being visited
* @param typeProvider the object used to access the types from the core library
*/
ScopedVisitor(Library library, Source source, TypeProvider typeProvider) {
this._definingLibrary = library.libraryElement;
this._source = source;
LibraryScope libraryScope2 = library.libraryScope;
this._errorListener = libraryScope2.errorListener;
this._nameScope = libraryScope2;
this._typeProvider = typeProvider;
}
/**
* Return the library element for the library containing the compilation unit being resolved.
* @return the library element for the library containing the compilation unit being resolved
*/
LibraryElement get definingLibrary => _definingLibrary;
/**
* Return the object used to access the types from the core library.
* @return the object used to access the types from the core library
*/
TypeProvider get typeProvider => _typeProvider;
Object visitBlock(Block node) {
Scope outerScope = _nameScope;
_nameScope = new EnclosedScope(_nameScope);
try {
super.visitBlock(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitClassDeclaration(ClassDeclaration node) {
Scope outerScope = _nameScope;
try {
_nameScope = new ClassScope(_nameScope, node.element);
super.visitClassDeclaration(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitClassTypeAlias(ClassTypeAlias node) {
Scope outerScope = _nameScope;
try {
_nameScope = new ClassScope(_nameScope, node.element);
super.visitClassTypeAlias(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitConstructorDeclaration(ConstructorDeclaration node) {
Scope outerScope = _nameScope;
try {
_nameScope = new FunctionScope(_nameScope, node.element);
super.visitConstructorDeclaration(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitDoStatement(DoStatement node) {
LabelScope outerScope = _labelScope;
_labelScope = new LabelScope.con1(outerScope, false, false);
try {
super.visitDoStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
Object visitForEachStatement(ForEachStatement node) {
LabelScope outerScope = _labelScope;
_labelScope = new LabelScope.con1(outerScope, false, false);
try {
super.visitForEachStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
Object visitForStatement(ForStatement node) {
LabelScope outerScope = _labelScope;
_labelScope = new LabelScope.con1(outerScope, false, false);
try {
super.visitForStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
Object visitFunctionDeclaration(FunctionDeclaration node) {
FunctionElement function = node.element;
Scope outerScope = _nameScope;
try {
_nameScope = new FunctionScope(_nameScope, function);
super.visitFunctionDeclaration(node);
} finally {
_nameScope = outerScope;
}
_nameScope.define(function);
return null;
}
Object visitFunctionExpression(FunctionExpression node) {
Scope outerScope = _nameScope;
try {
_nameScope = new FunctionScope(_nameScope, node.element);
super.visitFunctionExpression(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitFunctionTypeAlias(FunctionTypeAlias node) {
Scope outerScope = _nameScope;
try {
_nameScope = new FunctionTypeScope(_nameScope, node.element);
super.visitFunctionTypeAlias(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitLabeledStatement(LabeledStatement node) {
LabelScope outerScope = addScopesFor(node.labels);
try {
super.visitLabeledStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
Object visitMethodDeclaration(MethodDeclaration node) {
Scope outerScope = _nameScope;
try {
_nameScope = new FunctionScope(_nameScope, node.element);
super.visitMethodDeclaration(node);
} finally {
_nameScope = outerScope;
}
return null;
}
Object visitSwitchCase(SwitchCase node) {
node.expression.accept(this);
LabelScope outerLabelScope = addScopesFor(node.labels);
Scope outerNameScope = _nameScope;
_nameScope = new EnclosedScope(_nameScope);
try {
node.statements.accept(this);
} finally {
_nameScope = outerNameScope;
_labelScope = outerLabelScope;
}
return null;
}
Object visitSwitchDefault(SwitchDefault node) {
LabelScope outerLabelScope = addScopesFor(node.labels);
Scope outerNameScope = _nameScope;
_nameScope = new EnclosedScope(_nameScope);
try {
node.statements.accept(this);
} finally {
_nameScope = outerNameScope;
_labelScope = outerLabelScope;
}
return null;
}
Object visitSwitchStatement(SwitchStatement node) {
LabelScope outerScope = _labelScope;
_labelScope = new LabelScope.con1(outerScope, true, false);
for (SwitchMember member in node.members) {
for (Label label in member.labels) {
SimpleIdentifier labelName = label.label;
LabelElement labelElement = (labelName.element as LabelElement);
_labelScope = new LabelScope.con2(outerScope, labelName.name, labelElement);
}
}
try {
super.visitSwitchStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
Object visitVariableDeclaration(VariableDeclaration node) {
if (node.parent.parent is! TopLevelVariableDeclaration) {
VariableElement element19 = node.element;
if (element19 != null) {
_nameScope.define(element19);
}
}
super.visitVariableDeclaration(node);
return null;
}
Object visitWhileStatement(WhileStatement node) {
LabelScope outerScope = _labelScope;
_labelScope = new LabelScope.con1(outerScope, false, false);
try {
super.visitWhileStatement(node);
} finally {
_labelScope = outerScope;
}
return null;
}
/**
* Return the label scope in which the current node is being resolved.
* @return the label scope in which the current node is being resolved
*/
LabelScope get labelScope => _labelScope;
/**
* Return the name scope in which the current node is being resolved.
* @return the name scope in which the current node is being resolved
*/
Scope get nameScope => _nameScope;
/**
* Report an error with the given error code and arguments.
* @param errorCode the error code of the error to be reported
* @param node the node specifying the location of the error
* @param arguments the arguments to the error, used to compose the error message
*/
void reportError(ResolverErrorCode errorCode, ASTNode node, List<Object> arguments) {
_errorListener.onError(new AnalysisError.con2(_source, node.offset, node.length, errorCode, [arguments]));
}
/**
* Report an error with the given error code and arguments.
* @param errorCode the error code of the error to be reported
* @param token the token specifying the location of the error
* @param arguments the arguments to the error, used to compose the error message
*/
void reportError2(ResolverErrorCode errorCode, Token token, List<Object> arguments) {
_errorListener.onError(new AnalysisError.con2(_source, token.offset, token.length, errorCode, [arguments]));
}
/**
* Add scopes for each of the given labels.
* @param labels the labels for which new scopes are to be added
* @return the scope that was in effect before the new scopes were added
*/
LabelScope addScopesFor(NodeList<Label> labels) {
LabelScope outerScope = _labelScope;
for (Label label in labels) {
SimpleIdentifier labelNameNode = label.label;
String labelName = labelNameNode.name;
LabelElement labelElement = (labelNameNode.element as LabelElement);
_labelScope = new LabelScope.con2(_labelScope, labelName, labelElement);
}
return outerScope;
}
}
/**
* Instances of the class {@code StaticTypeAnalyzer} perform two type-related tasks. First, they
* compute the static type of every expression. Second, they look for any static type errors or
* warnings that might need to be generated. The requirements for the type analyzer are:
* <ol>
* <li>Every element that refers to types should be fully populated.
* <li>Every node representing an expression should be resolved to the Type of the expression.</li>
* </ol>
*/
class StaticTypeAnalyzer extends SimpleASTVisitor<Object> {
/**
* The resolver driving this participant.
*/
ResolverVisitor _resolver;
/**
* The object providing access to the types defined by the language.
*/
TypeProvider _typeProvider;
/**
* The type representing the class containing the nodes being analyzed, or {@code null} if the
* nodes are not within a class.
*/
InterfaceType _thisType;
/**
* Initialize a newly created type analyzer.
* @param resolver the resolver driving this participant
*/
StaticTypeAnalyzer(ResolverVisitor resolver) {
this._resolver = resolver;
_typeProvider = resolver.typeProvider;
}
/**
* Set the type of the class being analyzed to the given type.
* @param thisType the type representing the class containing the nodes being analyzed
*/
void set thisType(InterfaceType thisType2) {
this._thisType = thisType2;
}
/**
* The Dart Language Specification, 12.5: <blockquote>The static type of a string literal is{@code String}.</blockquote>
*/
Object visitAdjacentStrings(AdjacentStrings node) => recordType(node, _typeProvider.stringType);
/**
* The Dart Language Specification, 12.33: <blockquote>The static type of an argument definition
* test is {@code bool}.</blockquote>
*/
Object visitArgumentDefinitionTest(ArgumentDefinitionTest node) => recordType(node, _typeProvider.boolType);
/**
* The Dart Language Specification, 12.32: <blockquote>... the cast expression <i>e as T</i> ...
* <p>
* It is a static warning if <i>T</i> does not denote a type available in the current lexical
* scope.
* <p>
* The static type of a cast expression <i>e as T</i> is <i>T</i>.</blockquote>
*/
Object visitAsExpression(AsExpression node) => recordType(node, getType2(node.type));
/**
* The Dart Language Specification, 12.18: <blockquote> ... an assignment <i>a</i> of the form
* <i>v = e</i> ...
* <p>
* It is a static type warning if the static type of <i>e</i> may not be assigned to the static
* type of <i>v</i>.
* <p>
* The static type of the expression <i>v = e</i> is the static type of <i>e</i>.
* <p>
* ... an assignment of the form <i>C.v = e</i> ...
* <p>
* It is a static type warning if the static type of <i>e</i> may not be assigned to the static
* type of <i>C.v</i>.
* <p>
* The static type of the expression <i>C.v = e</i> is the static type of <i>e</i>.
* <p>
* ... an assignment of the form <i>e<sub>1</sub>.v = e<sub>2</sub></i> ...
* <p>
* Let <i>T</i> be the static type of <i>e<sub>1</sub></i>. It is a static type warning if
* <i>T</i> does not have an accessible instance setter named <i>v=</i>. It is a static type
* warning if the static type of <i>e<sub>2</sub></i> may not be assigned to <i>T</i>.
* <p>
* The static type of the expression <i>e<sub>1</sub>.v = e<sub>2</sub></i> is the static type of
* <i>e<sub>2</sub></i>.
* <p>
* ... an assignment of the form <i>e<sub>1</sub>[e<sub>2</sub>] = e<sub>3</sub></i> ...
* <p>
* The static type of the expression <i>e<sub>1</sub>[e<sub>2</sub>] = e<sub>3</sub></i> is the
* static type of <i>e<sub>3</sub></i>.
* <p>
* A compound assignment of the form <i>v op= e</i> is equivalent to <i>v = v op e</i>. A compound
* assignment of the form <i>C.v op= e</i> is equivalent to <i>C.v = C.v op e</i>. A compound
* assignment of the form <i>e<sub>1</sub>.v op= e<sub>2</sub></i> is equivalent to <i>((x) => x.v
* = x.v op e<sub>2</sub>)(e<sub>1</sub>)</i> where <i>x</i> is a variable that is not used in
* <i>e<sub>2</sub></i>. A compound assignment of the form <i>e<sub>1</sub>[e<sub>2</sub>] op=
* e<sub>3</sub></i> is equivalent to <i>((a, i) => a[i] = a[i] op e<sub>3</sub>)(e<sub>1</sub>,
* e<sub>2</sub>)</i> where <i>a</i> and <i>i</i> are a variables that are not used in
* <i>e<sub>3</sub></i>. </blockquote>
*/
Object visitAssignmentExpression(AssignmentExpression node) {
TokenType operator11 = node.operator.type;
if (operator11 != TokenType.EQ) {
return recordReturnType(node, node.element);
}
Type2 leftType = getType(node.leftHandSide);
Type2 rightType = getType(node.rightHandSide);
if (!rightType.isAssignableTo(leftType)) {
}
return recordType(node, rightType);
}
/**
* The Dart Language Specification, 12.20: <blockquote>The static type of a logical boolean
* expression is {@code bool}.</blockquote>
* <p>
* The Dart Language Specification, 12.21:<blockquote>A bitwise expression of the form
* <i>e<sub>1</sub> op e<sub>2</sub></i> is equivalent to the method invocation
* <i>e<sub>1</sub>.op(e<sub>2</sub>)</i>. A bitwise expression of the form <i>super op
* e<sub>2</sub></i> is equivalent to the method invocation
* <i>super.op(e<sub>2</sub>)</i>.</blockquote>
* <p>
* The Dart Language Specification, 12.22: <blockquote>The static type of an equality expression
* is {@code bool}.</blockquote>
* <p>
* The Dart Language Specification, 12.23: <blockquote>A relational expression of the form
* <i>e<sub>1</sub> op e<sub>2</sub></i> is equivalent to the method invocation
* <i>e<sub>1</sub>.op(e<sub>2</sub>)</i>. A relational expression of the form <i>super op
* e<sub>2</sub></i> is equivalent to the method invocation
* <i>super.op(e<sub>2</sub>)</i>.</blockquote>
* <p>
* The Dart Language Specification, 12.24: <blockquote>A shift expression of the form
* <i>e<sub>1</sub> op e<sub>2</sub></i> is equivalent to the method invocation
* <i>e<sub>1</sub>.op(e<sub>2</sub>)</i>. A shift expression of the form <i>super op
* e<sub>2</sub></i> is equivalent to the method invocation
* <i>super.op(e<sub>2</sub>)</i>.</blockquote>
* <p>
* The Dart Language Specification, 12.25: <blockquote>An additive expression of the form
* <i>e<sub>1</sub> op e<sub>2</sub></i> is equivalent to the method invocation
* <i>e<sub>1</sub>.op(e<sub>2</sub>)</i>. An additive expression of the form <i>super op
* e<sub>2</sub></i> is equivalent to the method invocation
* <i>super.op(e<sub>2</sub>)</i>.</blockquote>
* <p>
* The Dart Language Specification, 12.26: <blockquote>A multiplicative expression of the form
* <i>e<sub>1</sub> op e<sub>2</sub></i> is equivalent to the method invocation
* <i>e<sub>1</sub>.op(e<sub>2</sub>)</i>. A multiplicative expression of the form <i>super op
* e<sub>2</sub></i> is equivalent to the method invocation
* <i>super.op(e<sub>2</sub>)</i>.</blockquote>
*/
Object visitBinaryExpression(BinaryExpression node) {
TokenType operator12 = node.operator.type;
if (operator12 == TokenType.AMPERSAND_AMPERSAND || operator12 == TokenType.BAR_BAR || operator12 == TokenType.EQ_EQ || operator12 == TokenType.BANG_EQ) {
return recordType(node, _typeProvider.boolType);
}
return recordReturnType(node, node.element);
}
/**
* The Dart Language Specification, 12.4: <blockquote>The static type of a boolean literal is{@code bool}.</blockquote>
*/
Object visitBooleanLiteral(BooleanLiteral node) => recordType(node, _typeProvider.boolType);
/**
* The Dart Language Specification, 12.15.2: <blockquote>A cascaded method invocation expression
* of the form <i>e..suffix</i> is equivalent to the expression <i>(t) {t.suffix; return
* t;}(e)</i>.</blockquote>
*/
Object visitCascadeExpression(CascadeExpression node) => recordType(node, getType(node.target));
/**
* The Dart Language Specification, 12.19: <blockquote> ... a conditional expression <i>c</i> of
* the form <i>e<sub>1</sub> ? e<sub>2</sub> : e<sub>3</sub></i> ...
* <p>
* It is a static type warning if the type of e<sub>1</sub> may not be assigned to {@code bool}.
* <p>
* The static type of <i>c</i> is the least upper bound of the static type of <i>e<sub>2</sub></i>
* and the static type of <i>e<sub>3</sub></i>.</blockquote>
*/
Object visitConditionalExpression(ConditionalExpression node) {
Type2 conditionType = getType(node.condition);
if (conditionType != null && !conditionType.isAssignableTo(_typeProvider.boolType)) {
_resolver.reportError(ResolverErrorCode.NON_BOOLEAN_CONDITION, node.condition, []);
}
Type2 thenType = getType(node.thenExpression);
Type2 elseType = getType(node.elseExpression);
if (thenType == null) {
return recordType(node, _typeProvider.dynamicType);
}
Type2 resultType = thenType.getLeastUpperBound(elseType);
return recordType(node, resultType);
}
/**
* The Dart Language Specification, 12.3: <blockquote>The static type of a literal double is{@code double}.</blockquote>
*/
Object visitDoubleLiteral(DoubleLiteral node) => recordType(node, _typeProvider.doubleType);
/**
* The Dart Language Specification, 12.9: <blockquote>The static type of a function literal of the
* form <i>(T<sub>1</sub> a<sub>1</sub>, &hellip;, T<sub>n</sub> a<sub>n</sub>, [T<sub>n+1</sub>
* x<sub>n+1</sub> = d1, &hellip;, T<sub>n+k</sub> x<sub>n+k</sub> = dk]) => e</i> is
* <i>(T<sub>1</sub>, &hellip;, Tn, [T<sub>n+1</sub> x<sub>n+1</sub>, &hellip;, T<sub>n+k</sub>
* x<sub>n+k</sub>]) &rarr; T<sub>0</sub></i>, where <i>T<sub>0</sub></i> is the static type of
* <i>e</i>. In any case where <i>T<sub>i</sub>, 1 &lt;= i &lt;= n</i>, is not specified, it is
* considered to have been specified as dynamic.
* <p>
* The static type of a function literal of the form <i>(T<sub>1</sub> a<sub>1</sub>, &hellip;,
* T<sub>n</sub> a<sub>n</sub>, {T<sub>n+1</sub> x<sub>n+1</sub> : d1, &hellip;, T<sub>n+k</sub>
* x<sub>n+k</sub> : dk}) => e</i> is <i>(T<sub>1</sub>, &hellip;, T<sub>n</sub>, {T<sub>n+1</sub>
* x<sub>n+1</sub>, &hellip;, T<sub>n+k</sub> x<sub>n+k</sub>}) &rarr; T<sub>0</sub></i>, where
* <i>T<sub>0</sub></i> is the static type of <i>e</i>. In any case where <i>T<sub>i</sub>, 1
* &lt;= i &lt;= n</i>, is not specified, it is considered to have been specified as dynamic.
* <p>
* The static type of a function literal of the form <i>(T<sub>1</sub> a<sub>1</sub>, &hellip;,
* T<sub>n</sub> a<sub>n</sub>, [T<sub>n+1</sub> x<sub>n+1</sub> = d1, &hellip;, T<sub>n+k</sub>
* x<sub>n+k</sub> = dk]) {s}</i> is <i>(T<sub>1</sub>, &hellip;, T<sub>n</sub>, [T<sub>n+1</sub>
* x<sub>n+1</sub>, &hellip;, T<sub>n+k</sub> x<sub>n+k</sub>]) &rarr; dynamic</i>. In any case
* where <i>T<sub>i</sub>, 1 &lt;= i &lt;= n</i>, is not specified, it is considered to have been
* specified as dynamic.
* <p>
* The static type of a function literal of the form <i>(T<sub>1</sub> a<sub>1</sub>, &hellip;,
* T<sub>n</sub> a<sub>n</sub>, {T<sub>n+1</sub> x<sub>n+1</sub> : d1, &hellip;, T<sub>n+k</sub>
* x<sub>n+k</sub> : dk}) {s}</i> is <i>(T<sub>1</sub>, &hellip;, T<sub>n</sub>, {T<sub>n+1</sub>
* x<sub>n+1</sub>, &hellip;, T<sub>n+k</sub> x<sub>n+k</sub>}) &rarr; dynamic</i>. In any case
* where <i>T<sub>i</sub>, 1 &lt;= i &lt;= n</i>, is not specified, it is considered to have been
* specified as dynamic.</blockquote>
*/
Object visitFunctionExpression(FunctionExpression node) {
FunctionTypeImpl functionType = (node.element.type as FunctionTypeImpl);
setTypeInformation(functionType, computeReturnType(node), node.parameters);
return recordType(node, functionType);
}
/**
* The Dart Language Specification, 12.14.4: <blockquote>A function expression invocation <i>i</i>
* has the form <i>e<sub>f</sub>(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>, where <i>e<sub>f</sub></i> is
* an expression.
* <p>
* It is a static type warning if the static type <i>F</i> of <i>e<sub>f</sub></i> may not be
* assigned to a function type.
* <p>
* If <i>F</i> is not a function type, the static type of <i>i</i> is dynamic. Otherwise the
* static type of <i>i</i> is the declared return type of <i>F</i>.</blockquote>
*/
Object visitFunctionExpressionInvocation(FunctionExpressionInvocation node) => recordReturnType(node, node.element);
/**
* The Dart Language Specification, 12.29: <blockquote>An assignable expression of the form
* <i>e<sub>1</sub>[e<sub>2</sub>]</i> is evaluated as a method invocation of the operator method
* <i>[]</i> on <i>e<sub>1</sub></i> with argument <i>e<sub>2</sub></i>.</blockquote>
*/
Object visitIndexExpression(IndexExpression node) => recordReturnType(node, node.element);
/**
* The Dart Language Specification, 12.11.1: <blockquote>The static type of a new expression of
* either the form <i>new T.id(a<sub>1</sub>, &hellip;, a<sub>n</sub>)</i> or the form <i>new
* T(a<sub>1</sub>, &hellip;, a<sub>n</sub>)</i> is <i>T</i>.</blockquote>
* <p>
* The Dart Language Specification, 12.11.2: <blockquote>The static type of a constant object
* expression of either the form <i>const T.id(a<sub>1</sub>, &hellip;, a<sub>n</sub>)</i> or the
* form <i>const T(a<sub>1</sub>, &hellip;, a<sub>n</sub>)</i> is <i>T</i>. </blockquote>
*/
Object visitInstanceCreationExpression(InstanceCreationExpression node) => recordReturnType(node, node.element);
/**
* The Dart Language Specification, 12.3: <blockquote>The static type of an integer literal is{@code int}.</blockquote>
*/
Object visitIntegerLiteral(IntegerLiteral node) => recordType(node, _typeProvider.intType);
/**
* The Dart Language Specification, 12.31: <blockquote>It is a static warning if <i>T</i> does not
* denote a type available in the current lexical scope.
* <p>
* The static type of an is-expression is {@code bool}.</blockquote>
*/
Object visitIsExpression(IsExpression node) => recordType(node, _typeProvider.boolType);
/**
* The Dart Language Specification, 12.6: <blockquote>The static type of a list literal of the
* form <i><b>const</b> &lt;E&gt;[e<sub>1</sub>, &hellip;, e<sub>n</sub>]</i> or the form
* <i>&lt;E&gt;[e<sub>1</sub>, &hellip;, e<sub>n</sub>]</i> is {@code List&lt;E&gt;}. The static
* type a list literal of the form <i><b>const</b> [e<sub>1</sub>, &hellip;, e<sub>n</sub>]</i> or
* the form <i>[e<sub>1</sub>, &hellip;, e<sub>n</sub>]</i> is {@code List&lt;dynamic&gt;}.</blockquote>
*/
Object visitListLiteral(ListLiteral node) {
TypeArgumentList typeArguments8 = node.typeArguments;
if (typeArguments8 != null) {
NodeList<TypeName> arguments3 = typeArguments8.arguments;
if (arguments3 != null && arguments3.length == 1) {
TypeName argumentType = arguments3[0];
return recordType(node, _typeProvider.listType.substitute5(<Type2> [getType2(argumentType)]));
}
}
return recordType(node, _typeProvider.listType.substitute5(<Type2> [_typeProvider.dynamicType]));
}
/**
* The Dart Language Specification, 12.7: <blockquote>The static type of a map literal of the form
* <i><b>const</b> &lt;String, V&gt; {k<sub>1</sub>:e<sub>1</sub>, &hellip;,
* k<sub>n</sub>:e<sub>n</sub>}</i> or the form <i>&lt;String, V&gt; {k<sub>1</sub>:e<sub>1</sub>,
* &hellip;, k<sub>n</sub>:e<sub>n</sub>}</i> is {@code Map&lt;String, V&gt;}. The static type a
* map literal of the form <i><b>const</b> {k<sub>1</sub>:e<sub>1</sub>, &hellip;,
* k<sub>n</sub>:e<sub>n</sub>}</i> or the form <i>{k<sub>1</sub>:e<sub>1</sub>, &hellip;,
* k<sub>n</sub>:e<sub>n</sub>}</i> is {@code Map&lt;String, dynamic&gt;}.
* <p>
* It is a compile-time error if the first type argument to a map literal is not
* <i>String</i>.</blockquote>
*/
Object visitMapLiteral(MapLiteral node) {
TypeArgumentList typeArguments9 = node.typeArguments;
if (typeArguments9 != null) {
NodeList<TypeName> arguments4 = typeArguments9.arguments;
if (arguments4 != null && arguments4.length == 2) {
TypeName keyType = arguments4[0];
if (keyType != _typeProvider.stringType) {
}
TypeName valueType = arguments4[1];
return recordType(node, _typeProvider.mapType.substitute5(<Type2> [_typeProvider.stringType, getType2(valueType)]));
}
}
return recordType(node, _typeProvider.mapType.substitute5(<Type2> [_typeProvider.stringType, _typeProvider.dynamicType]));
}
/**
* The Dart Language Specification, 12.15.1: <blockquote>An ordinary method invocation <i>i</i>
* has the form <i>o.m(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>.
* <p>
* Let <i>T</i> be the static type of <i>o</i>. It is a static type warning if <i>T</i> does not
* have an accessible instance member named <i>m</i>. If <i>T.m</i> exists, it is a static warning
* if the type <i>F</i> of <i>T.m</i> may not be assigned to a function type.
* <p>
* If <i>T.m</i> does not exist, or if <i>F</i> is not a function type, the static type of
* <i>i</i> is dynamic. Otherwise the static type of <i>i</i> is the declared return type of
* <i>F</i>.</blockquote>
* <p>
* The Dart Language Specification, 11.15.3: <blockquote>A static method invocation <i>i</i> has
* the form <i>C.m(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>.
* <p>
* It is a static type warning if the type <i>F</i> of <i>C.m</i> may not be assigned to a
* function type.
* <p>
* If <i>F</i> is not a function type, or if <i>C.m</i> does not exist, the static type of i is
* dynamic. Otherwise the static type of <i>i</i> is the declared return type of
* <i>F</i>.</blockquote>
* <p>
* The Dart Language Specification, 11.15.4: <blockquote>A super method invocation <i>i</i> has
* the form <i>super.m(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>.
* <p>
* It is a static type warning if <i>S</i> does not have an accessible instance member named m. If
* <i>S.m</i> exists, it is a static warning if the type <i>F</i> of <i>S.m</i> may not be
* assigned to a function type.
* <p>
* If <i>S.m</i> does not exist, or if <i>F</i> is not a function type, the static type of
* <i>i</i> is dynamic. Otherwise the static type of <i>i</i> is the declared return type of
* <i>F</i>.</blockquote>
*/
Object visitMethodInvocation(MethodInvocation node) => recordReturnType(node, node.methodName.element);
Object visitNamedExpression(NamedExpression node) => recordType(node, getType(node.expression));
/**
* The Dart Language Specification, 12.2: <blockquote>The static type of {@code null} is bottom.
* </blockquote>
*/
Object visitNullLiteral(NullLiteral node) => recordType(node, _typeProvider.bottomType);
Object visitParenthesizedExpression(ParenthesizedExpression node) => recordType(node, getType(node.expression));
/**
* The Dart Language Specification, 12.28: <blockquote>A postfix expression of the form
* <i>v++</i>, where <i>v</i> is an identifier, is equivalent to <i>(){var r = v; v = r + 1;
* return r}()</i>.
* <p>
* A postfix expression of the form <i>C.v++</i> is equivalent to <i>(){var r = C.v; C.v = r + 1;
* return r}()</i>.
* <p>
* A postfix expression of the form <i>e1.v++</i> is equivalent to <i>(x){var r = x.v; x.v = r +
* 1; return r}(e1)</i>.
* <p>
* A postfix expression of the form <i>e1[e2]++</i> is equivalent to <i>(a, i){var r = a[i]; a[i]
* = r + 1; return r}(e1, e2)</i>
* <p>
* A postfix expression of the form <i>v--</i>, where <i>v</i> is an identifier, is equivalent to
* <i>(){var r = v; v = r - 1; return r}()</i>.
* <p>
* A postfix expression of the form <i>C.v--</i> is equivalent to <i>(){var r = C.v; C.v = r - 1;
* return r}()</i>.
* <p>
* A postfix expression of the form <i>e1.v--</i> is equivalent to <i>(x){var r = x.v; x.v = r -
* 1; return r}(e1)</i>.
* <p>
* A postfix expression of the form <i>e1[e2]--</i> is equivalent to <i>(a, i){var r = a[i]; a[i]
* = r - 1; return r}(e1, e2)</i></blockquote>
*/
Object visitPostfixExpression(PostfixExpression node) => recordType(node, getType(node.operand));
/**
* See {@link #visitSimpleIdentifier(SimpleIdentifier)}.
*/
Object visitPrefixedIdentifier(PrefixedIdentifier node) {
SimpleIdentifier prefixedIdentifier = node.identifier;
Element element20 = prefixedIdentifier.element;
if (element20 is VariableElement) {
Type2 variableType = ((element20 as VariableElement)).type;
recordType(prefixedIdentifier, variableType);
return recordType(node, variableType);
} else if (element20 is PropertyAccessorElement) {
Type2 propertyType = ((element20 as PropertyAccessorElement)).type.returnType;
recordType(prefixedIdentifier, propertyType);
return recordType(node, propertyType);
} else if (element20 is MethodElement) {
Type2 returnType = ((element20 as MethodElement)).type;
recordType(prefixedIdentifier, returnType);
return recordType(node, returnType);
} else {
}
recordType(prefixedIdentifier, _typeProvider.dynamicType);
return recordType(node, _typeProvider.dynamicType);
}
/**
* The Dart Language Specification, 12.27: <blockquote>A unary expression <i>u</i> of the form
* <i>op e</i> is equivalent to a method invocation <i>expression e.op()</i>. An expression of the
* form <i>op super</i> is equivalent to the method invocation <i>super.op()<i>.</blockquote>
*/
Object visitPrefixExpression(PrefixExpression node) {
TokenType operator13 = node.operator.type;
if (identical(operator13, TokenType.BANG)) {
return recordType(node, _typeProvider.boolType);
}
return recordReturnType(node, node.element);
}
/**
* The Dart Language Specification, 12.13: <blockquote> Property extraction allows for a member of
* an object to be concisely extracted from the object. If <i>o</i> is an object, and if <i>m</i>
* is the name of a method member of <i>o</i>, then
* <ul>
* <li><i>o.m</i> is defined to be equivalent to: <i>(r<sub>1</sub>, &hellip;, r<sub>n</sub>,
* {p<sub>1</sub> : d<sub>1</sub>, &hellip;, p<sub>k</sub> : d<sub>k</sub>}){return
* o.m(r<sub>1</sub>, &hellip;, r<sub>n</sub>, p<sub>1</sub>: p<sub>1</sub>, &hellip;,
* p<sub>k</sub>: p<sub>k</sub>);}</i> if <i>m</i> has required parameters <i>r<sub>1</sub>,
* &hellip;, r<sub>n</sub></i>, and named parameters <i>p<sub>1</sub> &hellip; p<sub>k</sub></i>
* with defaults <i>d<sub>1</sub>, &hellip;, d<sub>k</sub></i>.</li>
* <li><i>(r<sub>1</sub>, &hellip;, r<sub>n</sub>, [p<sub>1</sub> = d<sub>1</sub>, &hellip;,
* p<sub>k</sub> = d<sub>k</sub>]){return o.m(r<sub>1</sub>, &hellip;, r<sub>n</sub>,
* p<sub>1</sub>, &hellip;, p<sub>k</sub>);}</i> if <i>m</i> has required parameters
* <i>r<sub>1</sub>, &hellip;, r<sub>n</sub></i>, and optional positional parameters
* <i>p<sub>1</sub> &hellip; p<sub>k</sub></i> with defaults <i>d<sub>1</sub>, &hellip;,
* d<sub>k</sub></i>.</li>
* </ul>
* Otherwise, if <i>m</i> is the name of a getter member of <i>o</i> (declared implicitly or
* explicitly) then <i>o.m</i> evaluates to the result of invoking the getter. </blockquote>
* <p>
* The Dart Language Specification, 12.17: <blockquote> ... a getter invocation <i>i</i> of the
* form <i>e.m</i> ...
* <p>
* Let <i>T</i> be the static type of <i>e</i>. It is a static type warning if <i>T</i> does not
* have a getter named <i>m</i>.
* <p>
* The static type of <i>i</i> is the declared return type of <i>T.m</i>, if <i>T.m</i> exists;
* otherwise the static type of <i>i</i> is dynamic.
* <p>
* ... a getter invocation <i>i</i> of the form <i>C.m</i> ...
* <p>
* It is a static warning if there is no class <i>C</i> in the enclosing lexical scope of
* <i>i</i>, or if <i>C</i> does not declare, implicitly or explicitly, a getter named <i>m</i>.
* <p>
* The static type of <i>i</i> is the declared return type of <i>C.m</i> if it exists or dynamic
* otherwise.
* <p>
* ... a top-level getter invocation <i>i</i> of the form <i>m</i>, where <i>m</i> is an
* identifier ...
* <p>
* The static type of <i>i</i> is the declared return type of <i>m</i>.</blockquote>
*/
Object visitPropertyAccess(PropertyAccess node) {
SimpleIdentifier propertyName2 = node.propertyName;
Element element21 = propertyName2.element;
if (element21 is MethodElement) {
FunctionType type11 = ((element21 as MethodElement)).type;
recordType(propertyName2, type11);
return recordType(node, type11);
} else if (element21 is PropertyAccessorElement) {
PropertyAccessorElement accessor = (element21 as PropertyAccessorElement);
if (accessor.isGetter()) {
if (accessor.type == null) {
recordType(propertyName2, _typeProvider.dynamicType);
return recordType(node, _typeProvider.dynamicType);
}
Type2 returnType4 = accessor.type.returnType;
recordType(propertyName2, returnType4);
return recordType(node, returnType4);
} else {
recordType(propertyName2, VoidTypeImpl.instance);
return recordType(node, VoidTypeImpl.instance);
}
} else {
}
recordType(propertyName2, _typeProvider.dynamicType);
return recordType(node, _typeProvider.dynamicType);
}
/**
* The Dart Language Specification, 12.30: <blockquote>Evaluation of an identifier expression
* <i>e</i> of the form <i>id</i> proceeds as follows:
* <p>
* Let <i>d</i> be the innermost declaration in the enclosing lexical scope whose name is
* <i>id</i>. If no such declaration exists in the lexical scope, let <i>d</i> be the declaration
* of the inherited member named <i>id</i> if it exists.
* <ul>
* <li>If <i>d</i> is a class or type alias <i>T</i>, the value of <i>e</i> is the unique instance
* of class {@code Type} reifying <i>T</i>.
* <li>If <i>d</i> is a type parameter <i>T</i>, then the value of <i>e</i> is the value of the
* actual type argument corresponding to <i>T</i> that was passed to the generative constructor
* that created the current binding of this. We are assured that this is well defined, because if
* we were in a static member the reference to <i>T</i> would be a compile-time error.
* <li>If <i>d</i> is a library variable then:
* <ul>
* <li>If <i>d</i> is of one of the forms <i>var v = e<sub>i</sub>;</i>, <i>T v =
* e<sub>i</sub>;</i>, <i>final v = e<sub>i</sub>;</i>, <i>final T v = e<sub>i</sub>;</i>, and no
* value has yet been stored into <i>v</i> then the initializer expression <i>e<sub>i</sub></i> is
* evaluated. If, during the evaluation of <i>e<sub>i</sub></i>, the getter for <i>v</i> is
* referenced, a CyclicInitializationError is thrown. If the evaluation succeeded yielding an
* object <i>o</i>, let <i>r = o</i>, otherwise let <i>r = null</i>. In any case, <i>r</i> is
* stored into <i>v</i>. The value of <i>e</i> is <i>r</i>.
* <li>If <i>d</i> is of one of the forms <i>const v = e;</i> or <i>const T v = e;</i> the result
* of the getter is the value of the compile time constant <i>e</i>. Otherwise
* <li><i>e</i> evaluates to the current binding of <i>id</i>.
* </ul>
* <li>If <i>d</i> is a local variable or formal parameter then <i>e</i> evaluates to the current
* binding of <i>id</i>.
* <li>If <i>d</i> is a static method, top level function or local function then <i>e</i>
* evaluates to the function defined by <i>d</i>.
* <li>If <i>d</i> is the declaration of a static variable or static getter declared in class
* <i>C</i>, then <i>e</i> is equivalent to the getter invocation <i>C.id</i>.
* <li>If <i>d</i> is the declaration of a top level getter, then <i>e</i> is equivalent to the
* getter invocation <i>id</i>.
* <li>Otherwise, if <i>e</i> occurs inside a top level or static function (be it function,
* method, getter, or setter) or variable initializer, evaluation of e causes a NoSuchMethodError
* to be thrown.
* <li>Otherwise <i>e</i> is equivalent to the property extraction <i>this.id</i>.
* </ul>
* </blockquote>
*/
Object visitSimpleIdentifier(SimpleIdentifier node) {
Element element22 = node.element;
if (element22 == null) {
return recordType(node, _typeProvider.dynamicType);
} else if (element22 is ClassElement) {
if (isTypeName(node)) {
return recordType(node, ((element22 as ClassElement)).type);
}
return recordType(node, _typeProvider.typeType);
} else if (element22 is TypeVariableElement) {
return recordType(node, ((element22 as TypeVariableElement)).type);
} else if (element22 is TypeAliasElement) {
return recordType(node, ((element22 as TypeAliasElement)).type);
} else if (element22 is VariableElement) {
return recordType(node, ((element22 as VariableElement)).type);
} else if (element22 is MethodElement) {
return recordType(node, ((element22 as MethodElement)).type);
} else if (element22 is PropertyAccessorElement) {
PropertyAccessorElement accessor = (element22 as PropertyAccessorElement);
if (accessor.isGetter()) {
return recordType(node, accessor.type.returnType);
} else {
return recordType(node, accessor.type.normalParameterTypes[0]);
}
} else if (element22 is ExecutableElement) {
return recordType(node, ((element22 as ExecutableElement)).type);
} else if (element22 is PrefixElement) {
return null;
} else {
return recordType(node, _typeProvider.dynamicType);
}
}
/**
* The Dart Language Specification, 12.5: <blockquote>The static type of a string literal is{@code String}.</blockquote>
*/
Object visitSimpleStringLiteral(SimpleStringLiteral node) => recordType(node, _typeProvider.stringType);
/**
* The Dart Language Specification, 12.5: <blockquote>The static type of a string literal is{@code String}.</blockquote>
*/
Object visitStringInterpolation(StringInterpolation node) => recordType(node, _typeProvider.stringType);
Object visitSuperExpression(SuperExpression node) => recordType(node, _thisType == null ? _typeProvider.dynamicType : _thisType.superclass);
/**
* The Dart Language Specification, 12.10: <blockquote>The static type of {@code this} is the
* interface of the immediately enclosing class.</blockquote>
*/
Object visitThisExpression(ThisExpression node) => recordType(node, _thisType);
/**
* The Dart Language Specification, 12.8: <blockquote>The static type of a throw expression is
* bottom.</blockquote>
*/
Object visitThrowExpression(ThrowExpression node) => recordType(node, _typeProvider.bottomType);
/**
* Given a function expression, compute the return type of the function. The return type of
* functions with a block body is {@code dynamicType}, with an expression body it is the type of
* the expression.
* @param node the function expression whose return type is to be computed
* @return the return type that was computed
*/
Type2 computeReturnType(FunctionExpression node) {
FunctionBody body4 = node.body;
if (body4 is ExpressionFunctionBody) {
return getType(((body4 as ExpressionFunctionBody)).expression);
}
return _typeProvider.dynamicType;
}
/**
* Return the type of the given expression that is to be used for type analysis.
* @param expression the expression whose type is to be returned
* @return the type of the given expression
*/
Type2 getType(Expression expression) {
Type2 type = expression.staticType;
if (type == null) {
return _typeProvider.dynamicType;
}
return type;
}
/**
* Return the type represented by the given type name.
* @param typeName the type name representing the type to be returned
* @return the type represented by the type name
*/
Type2 getType2(TypeName typeName) {
Type2 type12 = typeName.type;
if (type12 == null) {
return _typeProvider.dynamicType;
}
return type12;
}
/**
* Return {@code true} if the given node is being used as the name of a type.
* @param node the node being tested
* @return {@code true} if the given node is being used as the name of a type
*/
bool isTypeName(SimpleIdentifier node) {
ASTNode parent8 = node.parent;
return parent8 is TypeName || (parent8 is PrefixedIdentifier && parent8.parent is TypeName) || (parent8 is MethodInvocation && identical(node, ((parent8 as MethodInvocation)).target));
}
/**
* Record that the static type of the given node is the return type of the method or function
* represented by the given element.
* @param expression the node whose type is to be recorded
* @param element the element representing the method or function invoked by the given node
*/
Object recordReturnType(Expression expression, Element element) {
if (element is ExecutableElement) {
FunctionType type13 = ((element as ExecutableElement)).type;
if (type13 != null) {
return recordType(expression, type13.returnType);
}
} else if (element is VariableElement) {
Type2 variableType = ((element as VariableElement)).type;
if (variableType is FunctionType) {
return recordType(expression, ((variableType as FunctionType)).returnType);
}
}
return recordType(expression, _typeProvider.dynamicType);
}
/**
* Record that the static type of the given node is the given type.
* @param expression the node whose type is to be recorded
* @param type the static type of the node
*/
Object recordType(Expression expression, Type2 type) {
if (type == null) {
expression.staticType = _typeProvider.dynamicType;
} else {
expression.staticType = type;
}
return null;
}
/**
* Set the return type and parameter type information for the given function type based on the
* given return type and parameter elements.
* @param functionType the function type to be filled in
* @param returnType the return type of the function, or {@code null} if no type was declared
* @param parameters the elements representing the parameters to the function
*/
void setTypeInformation(FunctionTypeImpl functionType, Type2 returnType7, FormalParameterList parameterList) {
List<Type2> normalParameterTypes = new List<Type2>();
List<Type2> optionalParameterTypes = new List<Type2>();
LinkedHashMap<String, Type2> namedParameterTypes = new LinkedHashMap<String, Type2>();
if (parameterList != null) {
for (ParameterElement parameter in parameterList.elements) {
if (parameter.parameterKind == ParameterKind.REQUIRED) {
normalParameterTypes.add(parameter.type);
} else if (parameter.parameterKind == ParameterKind.POSITIONAL) {
optionalParameterTypes.add(parameter.type);
} else if (parameter.parameterKind == ParameterKind.NAMED) {
namedParameterTypes[parameter.name] = parameter.type;
}
}
}
functionType.normalParameterTypes = new List.from(normalParameterTypes);
functionType.optionalParameterTypes = new List.from(optionalParameterTypes);
functionType.namedParameterTypes = namedParameterTypes;
functionType.returnType = returnType7;
}
}
/**
* The interface {@code TypeProvider} defines the behavior of objects that provide access to types
* defined by the language.
*/
abstract class TypeProvider {
/**
* Return the type representing the built-in type 'bool'.
* @return the type representing the built-in type 'bool'
*/
InterfaceType get boolType;
/**
* Return the type representing the type 'bottom'.
* @return the type representing the type 'bottom'
*/
Type2 get bottomType;
/**
* Return the type representing the built-in type 'double'.
* @return the type representing the built-in type 'double'
*/
InterfaceType get doubleType;
/**
* Return the type representing the built-in type 'dynamic'.
* @return the type representing the built-in type 'dynamic'
*/
Type2 get dynamicType;
/**
* Return the type representing the built-in type 'Function'.
* @return the type representing the built-in type 'Function'
*/
InterfaceType get functionType;
/**
* Return the type representing the built-in type 'int'.
* @return the type representing the built-in type 'int'
*/
InterfaceType get intType;
/**
* Return the type representing the built-in type 'List'.
* @return the type representing the built-in type 'List'
*/
InterfaceType get listType;
/**
* Return the type representing the built-in type 'Map'.
* @return the type representing the built-in type 'Map'
*/
InterfaceType get mapType;
/**
* Return the type representing the built-in type 'Object'.
* @return the type representing the built-in type 'Object'
*/
InterfaceType get objectType;
/**
* Return the type representing the built-in type 'StackTrace'.
* @return the type representing the built-in type 'StackTrace'
*/
InterfaceType get stackTraceType;
/**
* Return the type representing the built-in type 'String'.
* @return the type representing the built-in type 'String'
*/
InterfaceType get stringType;
/**
* Return the type representing the built-in type 'Type'.
* @return the type representing the built-in type 'Type'
*/
InterfaceType get typeType;
}
/**
* Instances of the class {@code TypeProviderImpl} provide access to types defined by the language
* by looking for those types in the element model for the core library.
*/
class TypeProviderImpl implements TypeProvider {
/**
* The type representing the built-in type 'bool'.
*/
InterfaceType _boolType;
/**
* The type representing the type 'bottom'.
*/
Type2 _bottomType;
/**
* The type representing the built-in type 'double'.
*/
InterfaceType _doubleType;
/**
* The type representing the built-in type 'dynamic'.
*/
Type2 _dynamicType;
/**
* The type representing the built-in type 'Function'.
*/
InterfaceType _functionType;
/**
* The type representing the built-in type 'int'.
*/
InterfaceType _intType;
/**
* The type representing the built-in type 'List'.
*/
InterfaceType _listType;
/**
* The type representing the built-in type 'Map'.
*/
InterfaceType _mapType;
/**
* The type representing the built-in type 'Object'.
*/
InterfaceType _objectType;
/**
* The type representing the built-in type 'StackTrace'.
*/
InterfaceType _stackTraceType;
/**
* The type representing the built-in type 'String'.
*/
InterfaceType _stringType;
/**
* The type representing the built-in type 'Type'.
*/
InterfaceType _typeType;
/**
* Initialize a newly created type provider to provide the types defined in the given library.
* @param coreLibrary the element representing the core library (dart:core).
*/
TypeProviderImpl(LibraryElement coreLibrary) {
initializeFrom(coreLibrary);
}
InterfaceType get boolType => _boolType;
Type2 get bottomType => _bottomType;
InterfaceType get doubleType => _doubleType;
Type2 get dynamicType => _dynamicType;
InterfaceType get functionType => _functionType;
InterfaceType get intType => _intType;
InterfaceType get listType => _listType;
InterfaceType get mapType => _mapType;
InterfaceType get objectType => _objectType;
InterfaceType get stackTraceType => _stackTraceType;
InterfaceType get stringType => _stringType;
InterfaceType get typeType => _typeType;
/**
* Return the type with the given name from the given namespace, or {@code null} if there is no
* class with the given name.
* @param namespace the namespace in which to search for the given name
* @param typeName the name of the type being searched for
* @return the type that was found
*/
InterfaceType getType(Namespace namespace, String typeName) {
Element element = namespace.get(typeName);
if (element == null) {
AnalysisEngine.instance.logger.logInformation("No definition of type ${typeName}");
return null;
}
return ((element as ClassElement)).type;
}
/**
* Initialize the types provided by this type provider from the given library.
* @param library the library containing the definitions of the core types
*/
void initializeFrom(LibraryElement library) {
Namespace namespace = new NamespaceBuilder().createPublicNamespace(library);
_boolType = getType(namespace, "bool");
_bottomType = BottomTypeImpl.instance;
_doubleType = getType(namespace, "double");
_dynamicType = DynamicTypeImpl.instance;
_functionType = getType(namespace, "Function");
_intType = getType(namespace, "int");
_listType = getType(namespace, "List");
_mapType = getType(namespace, "Map");
_objectType = getType(namespace, "Object");
_stackTraceType = getType(namespace, "StackTrace");
_stringType = getType(namespace, "String");
_typeType = getType(namespace, "Type");
}
}
/**
* Instances of the class {@code TypeResolverVisitor} are used to resolve the types associated with
* the elements in the element model. This includes the types of superclasses, mixins, interfaces,
* fields, methods, parameters, and local variables. As a side-effect, this also finishes building
* the type hierarchy.
*/
class TypeResolverVisitor extends ScopedVisitor {
/**
* Initialize a newly created visitor to resolve the nodes in a compilation unit.
* @param library the library containing the compilation unit being resolved
* @param source the source representing the compilation unit being visited
* @param typeProvider the object used to access the types from the core library
*/
TypeResolverVisitor(Library library, Source source, TypeProvider typeProvider) : super(library, source, typeProvider) {
}
Object visitCatchClause(CatchClause node) {
super.visitCatchClause(node);
SimpleIdentifier exception = node.exceptionParameter;
if (exception != null) {
TypeName exceptionTypeName = node.exceptionType;
Type2 exceptionType;
if (exceptionTypeName == null) {
exceptionType = typeProvider.objectType;
} else {
exceptionType = getType(exceptionTypeName);
}
recordType(exception, exceptionType);
Element element23 = exception.element;
if (element23 is VariableElementImpl) {
((element23 as VariableElementImpl)).type = exceptionType;
} else {
}
}
SimpleIdentifier stackTrace = node.stackTraceParameter;
if (stackTrace != null) {
recordType(stackTrace, typeProvider.stackTraceType);
}
return null;
}
Object visitClassDeclaration(ClassDeclaration node) {
super.visitClassDeclaration(node);
ClassElementImpl classElement = getClassElement(node.name);
InterfaceType superclassType = null;
ExtendsClause extendsClause4 = node.extendsClause;
if (extendsClause4 != null) {
superclassType = resolveType(extendsClause4.superclass, null, null, null);
}
if (classElement != null) {
if (superclassType == null) {
InterfaceType objectType2 = typeProvider.objectType;
if (classElement.type != objectType2) {
superclassType = objectType2;
}
}
classElement.supertype = superclassType;
}
resolve(classElement, node.withClause, node.implementsClause);
return null;
}
Object visitClassTypeAlias(ClassTypeAlias node) {
super.visitClassTypeAlias(node);
ClassElementImpl classElement = getClassElement(node.name);
InterfaceType superclassType = resolveType(node.superclass, null, null, null);
if (superclassType == null) {
superclassType = typeProvider.objectType;
}
if (classElement != null && superclassType != null) {
classElement.supertype = superclassType;
}
resolve(classElement, node.withClause, node.implementsClause);
return null;
}
Object visitConstructorDeclaration(ConstructorDeclaration node) {
super.visitConstructorDeclaration(node);
ExecutableElementImpl element24 = (node.element as ExecutableElementImpl);
FunctionTypeImpl type = new FunctionTypeImpl.con1(element24);
setTypeInformation(type, null, element24.parameters);
type.returnType = ((element24.enclosingElement as ClassElement)).type;
element24.type = type;
return null;
}
Object visitDefaultFormalParameter(DefaultFormalParameter node) {
super.visitDefaultFormalParameter(node);
return null;
}
Object visitFieldFormalParameter(FieldFormalParameter node) {
super.visitFieldFormalParameter(node);
Element element25 = node.identifier.element;
if (element25 is ParameterElementImpl) {
ParameterElementImpl parameter = (element25 as ParameterElementImpl);
Type2 type;
TypeName typeName = node.type;
if (typeName == null) {
type = typeProvider.dynamicType;
} else {
type = getType(typeName);
}
parameter.type = type;
} else {
}
return null;
}
Object visitFunctionDeclaration(FunctionDeclaration node) {
super.visitFunctionDeclaration(node);
ExecutableElementImpl element26 = (node.element as ExecutableElementImpl);
FunctionTypeImpl type = new FunctionTypeImpl.con1(element26);
setTypeInformation(type, node.returnType, element26.parameters);
element26.type = type;
return null;
}
Object visitFunctionTypeAlias(FunctionTypeAlias node) {
super.visitFunctionTypeAlias(node);
TypeAliasElementImpl element27 = (node.element as TypeAliasElementImpl);
FunctionTypeImpl type14 = (element27.type as FunctionTypeImpl);
setTypeInformation(type14, node.returnType, element27.parameters);
return null;
}
Object visitFunctionTypedFormalParameter(FunctionTypedFormalParameter node) {
super.visitFunctionTypedFormalParameter(node);
ParameterElementImpl element28 = (node.identifier.element as ParameterElementImpl);
FunctionTypeImpl type = new FunctionTypeImpl.con1((null as ExecutableElement));
setTypeInformation(type, node.returnType, getElements(node.parameters));
element28.type = type;
return null;
}
Object visitMethodDeclaration(MethodDeclaration node) {
super.visitMethodDeclaration(node);
ExecutableElementImpl element29 = (node.element as ExecutableElementImpl);
FunctionTypeImpl type = new FunctionTypeImpl.con1(element29);
setTypeInformation(type, node.returnType, element29.parameters);
element29.type = type;
return null;
}
Object visitSimpleFormalParameter(SimpleFormalParameter node) {
super.visitSimpleFormalParameter(node);
Type2 declaredType;
TypeName typeName = node.type;
if (typeName == null) {
declaredType = typeProvider.dynamicType;
} else {
declaredType = getType(typeName);
}
Element element30 = node.identifier.element;
if (element30 is ParameterElement) {
((element30 as ParameterElementImpl)).type = declaredType;
} else {
}
return null;
}
Object visitTypeName(TypeName node) {
super.visitTypeName(node);
Identifier typeName = node.name;
Element element = nameScope.lookup(typeName, definingLibrary);
Type2 type = null;
if (element == null) {
DynamicTypeImpl dynamicType = DynamicTypeImpl.instance;
VoidTypeImpl voidType = VoidTypeImpl.instance;
if (typeName.name == dynamicType.name) {
element = dynamicType.element;
type = dynamicType;
setElement(typeName, element);
} else if (typeName.name == voidType.name) {
type = voidType;
} else {
ASTNode parent9 = node.parent;
if (typeName is PrefixedIdentifier && parent9 is ConstructorName) {
ConstructorName name = (parent9 as ConstructorName);
if (name.name == null) {
SimpleIdentifier prefix7 = ((typeName as PrefixedIdentifier)).prefix;
element = nameScope.lookup(prefix7, definingLibrary);
if (element is PrefixElement) {
return null;
} else if (element != null) {
name.name = ((typeName as PrefixedIdentifier)).identifier;
node.name = prefix7;
typeName = prefix7;
}
}
}
}
}
if (element == null && type == null) {
return null;
} else if (element is ClassElement) {
setElement(typeName, element);
type = ((element as ClassElement)).type;
} else if (element is TypeAliasElement) {
setElement(typeName, element);
type = ((element as TypeAliasElement)).type;
} else if (element is TypeVariableElement) {
setElement(typeName, element);
type = ((element as TypeVariableElement)).type;
} else if (type == null) {
return null;
}
if (type == null) {
return null;
}
TypeArgumentList argumentList = node.typeArguments;
if (argumentList != null) {
NodeList<TypeName> arguments5 = argumentList.arguments;
int argumentCount = arguments5.length;
List<Type2> parameters = getTypeArguments(type);
int parameterCount = parameters.length;
if (argumentCount != parameterCount) {
}
List<Type2> typeArguments = new List<Type2>(argumentCount);
for (int i = 0; i < argumentCount; i++) {
Type2 argumentType = getType(arguments5[i]);
if (argumentType != null) {
typeArguments.add(argumentType);
}
}
if (type is InterfaceTypeImpl) {
InterfaceTypeImpl interfaceType = (type as InterfaceTypeImpl);
argumentCount = typeArguments.length;
if (interfaceType.typeArguments.length == argumentCount) {
type = interfaceType.substitute5(new List.from(typeArguments));
} else {
}
} else if (type is FunctionTypeImpl) {
FunctionTypeImpl functionType = (type as FunctionTypeImpl);
argumentCount = typeArguments.length;
if (functionType.typeArguments.length == argumentCount) {
type = functionType.substitute4(new List.from(typeArguments));
} else {
}
} else {
}
} else {
List<Type2> parameters = getTypeArguments(type);
int parameterCount = parameters.length;
if (parameterCount > 0) {
DynamicTypeImpl dynamicType = DynamicTypeImpl.instance;
List<Type2> arguments = new List<Type2>.fixedLength(parameterCount);
for (int i = 0; i < parameterCount; i++) {
arguments[i] = dynamicType;
}
type = type.substitute2(arguments, parameters);
}
}
typeName.staticType = type;
node.type = type;
return null;
}
Object visitVariableDeclaration(VariableDeclaration node) {
super.visitVariableDeclaration(node);
Type2 declaredType;
TypeName typeName = ((node.parent as VariableDeclarationList)).type;
if (typeName == null) {
declaredType = typeProvider.dynamicType;
} else {
declaredType = getType(typeName);
}
Element element31 = node.name.element;
if (element31 is VariableElement) {
((element31 as VariableElementImpl)).type = declaredType;
if (element31 is FieldElement) {
FieldElement field = (element31 as FieldElement);
PropertyAccessorElementImpl getter3 = (field.getter as PropertyAccessorElementImpl);
FunctionTypeImpl getterType = new FunctionTypeImpl.con1(getter3);
getterType.returnType = declaredType;
getter3.type = getterType;
PropertyAccessorElementImpl setter3 = (field.setter as PropertyAccessorElementImpl);
if (setter3 != null) {
FunctionTypeImpl setterType = new FunctionTypeImpl.con1(setter3);
setterType.returnType = VoidTypeImpl.instance;
setterType.normalParameterTypes = <Type2> [declaredType];
setter3.type = setterType;
}
}
} else {
}
return null;
}
/**
* Return the class element that represents the class whose name was provided.
* @param identifier the name from the declaration of a class
* @return the class element that represents the class
*/
ClassElementImpl getClassElement(SimpleIdentifier identifier) {
if (identifier == null) {
return null;
}
Element element32 = identifier.element;
if (element32 is! ClassElementImpl) {
return null;
}
return (element32 as ClassElementImpl);
}
/**
* Return an array containing all of the elements associated with the parameters in the given
* list.
* @param parameterList the list of parameters whose elements are to be returned
* @return the elements associated with the parameters
*/
List<ParameterElement> getElements(FormalParameterList parameterList) {
List<ParameterElement> elements = new List<ParameterElement>();
for (FormalParameter parameter in parameterList.parameters) {
ParameterElement element33 = (parameter.identifier.element as ParameterElement);
if (element33 != null) {
elements.add(element33);
}
}
return new List.from(elements);
}
/**
* Return the type represented by the given type name.
* @param typeName the type name representing the type to be returned
* @return the type represented by the type name
*/
Type2 getType(TypeName typeName) => typeName.type;
/**
* Return the type arguments associated with the given type.
* @param type the type whole type arguments are to be returned
* @return the type arguments associated with the given type
*/
List<Type2> getTypeArguments(Type2 type) {
if (type is InterfaceType) {
return ((type as InterfaceType)).typeArguments;
} else if (type is FunctionType) {
return ((type as FunctionType)).typeArguments;
}
return TypeImpl.EMPTY_ARRAY;
}
/**
* Record that the static type of the given node is the given type.
* @param expression the node whose type is to be recorded
* @param type the static type of the node
*/
Object recordType(Expression expression, Type2 type) {
if (type == null) {
expression.staticType = typeProvider.dynamicType;
} else {
expression.staticType = type;
}
return null;
}
/**
* Resolve the types in the given with and implements clauses and associate those types with the
* given class element.
* @param classElement the class element with which the mixin and interface types are to be
* associated
* @param withClause the with clause to be resolved
* @param implementsClause the implements clause to be resolved
*/
void resolve(ClassElementImpl classElement, WithClause withClause, ImplementsClause implementsClause) {
if (withClause != null) {
List<InterfaceType> mixinTypes2 = resolveTypes(withClause.mixinTypes, null, null, null);
if (classElement != null) {
classElement.mixins = mixinTypes2;
}
}
if (implementsClause != null) {
List<InterfaceType> interfaceTypes = resolveTypes(implementsClause.interfaces, null, null, null);
if (classElement != null) {
classElement.interfaces = interfaceTypes;
}
}
}
/**
* Return the type specified by the given name.
* @param typeName the type name specifying the type to be returned
* @param undefinedError the error to produce if the type name is not defined
* @param nonTypeError the error to produce if the type name is defined to be something other than
* a type
* @param nonInterfaceType the error to produce if the type is not an interface type
* @return the type specified by the type name
*/
InterfaceType resolveType(TypeName typeName, ResolverErrorCode undefinedError, ResolverErrorCode nonTypeError, ResolverErrorCode nonInterfaceType) {
Identifier name15 = typeName.name;
Element element = nameScope.lookup(name15, definingLibrary);
if (element == null) {
reportError(undefinedError, name15, []);
} else if (element is ClassElement) {
Type2 classType = ((element as ClassElement)).type;
typeName.type = classType;
if (classType is InterfaceType) {
return (classType as InterfaceType);
}
reportError(nonInterfaceType, name15, []);
} else {
reportError(nonTypeError, name15, []);
}
return null;
}
/**
* Resolve the types in the given list of type names.
* @param typeNames the type names to be resolved
* @param undefinedError the error to produce if the type name is not defined
* @param nonTypeError the error to produce if the type name is defined to be something other than
* a type
* @param nonInterfaceType the error to produce if the type is not an interface type
* @return an array containing all of the types that were resolved.
*/
List<InterfaceType> resolveTypes(NodeList<TypeName> typeNames, ResolverErrorCode undefinedError, ResolverErrorCode nonTypeError, ResolverErrorCode nonInterfaceType) {
List<InterfaceType> types = new List<InterfaceType>();
for (TypeName typeName in typeNames) {
InterfaceType type = resolveType(typeName, undefinedError, nonTypeError, nonInterfaceType);
if (type != null) {
types.add(type);
}
}
return new List.from(types);
}
void setElement(Identifier typeName, Element element41) {
if (element41 != null) {
typeName.element = element41;
if (typeName is PrefixedIdentifier) {
PrefixedIdentifier identifier = (typeName as PrefixedIdentifier);
identifier.identifier.element = element41;
SimpleIdentifier prefix8 = identifier.prefix;
Element prefixElement = nameScope.lookup(prefix8, definingLibrary);
if (prefixElement != null) {
prefix8.element = prefixElement;
}
}
}
}
/**
* Set the return type and parameter type information for the given function type based on the
* given return type and parameter elements.
* @param functionType the function type to be filled in
* @param returnType the return type of the function, or {@code null} if no type was declared
* @param parameters the elements representing the parameters to the function
*/
void setTypeInformation(FunctionTypeImpl functionType, TypeName returnType8, List<ParameterElement> parameters) {
List<Type2> normalParameterTypes = new List<Type2>();
List<Type2> optionalParameterTypes = new List<Type2>();
LinkedHashMap<String, Type2> namedParameterTypes = new LinkedHashMap<String, Type2>();
for (ParameterElement parameter in parameters) {
if (parameter.parameterKind == ParameterKind.REQUIRED) {
normalParameterTypes.add(parameter.type);
} else if (parameter.parameterKind == ParameterKind.POSITIONAL) {
optionalParameterTypes.add(parameter.type);
} else if (parameter.parameterKind == ParameterKind.NAMED) {
namedParameterTypes[parameter.name] = parameter.type;
}
}
functionType.normalParameterTypes = new List.from(normalParameterTypes);
functionType.optionalParameterTypes = new List.from(optionalParameterTypes);
functionType.namedParameterTypes = namedParameterTypes;
if (returnType8 == null) {
functionType.returnType = typeProvider.dynamicType;
} else {
functionType.returnType = returnType8.type;
}
}
}
/**
* Instances of the class {@code ClassScope} implement the scope defined by a class.
*/
class ClassScope extends EnclosedScope {
/**
* Initialize a newly created scope enclosed within another scope.
* @param enclosingScope the scope in which this scope is lexically enclosed
* @param typeElement the element representing the type represented by this scope
*/
ClassScope(Scope enclosingScope, ClassElement typeElement) : super(new EnclosedScope(enclosingScope)) {
defineTypeParameters(typeElement);
defineMembers(typeElement);
}
/**
* Define the instance members defined by the class.
* @param typeElement the element representing the type represented by this scope
*/
void defineMembers(ClassElement typeElement) {
for (PropertyAccessorElement accessor in typeElement.accessors) {
define(accessor);
}
for (FieldElement field in typeElement.fields) {
define(field);
}
for (MethodElement method in typeElement.methods) {
define(method);
}
}
/**
* Define the type parameters for the class.
* @param typeElement the element representing the type represented by this scope
*/
void defineTypeParameters(ClassElement typeElement) {
Scope parameterScope = enclosingScope;
for (TypeVariableElement parameter in typeElement.typeVariables) {
parameterScope.define(parameter);
}
}
}
/**
* Instances of the class {@code EnclosedScope} implement a scope that is lexically enclosed in
* another scope.
*/
class EnclosedScope extends Scope {
/**
* The scope in which this scope is lexically enclosed.
*/
Scope _enclosingScope;
/**
* Initialize a newly created scope enclosed within another scope.
* @param enclosingScope the scope in which this scope is lexically enclosed
*/
EnclosedScope(Scope enclosingScope) {
this._enclosingScope = enclosingScope;
}
LibraryElement get definingLibrary => _enclosingScope.definingLibrary;
AnalysisErrorListener get errorListener => _enclosingScope.errorListener;
/**
* Return the scope in which this scope is lexically enclosed.
* @return the scope in which this scope is lexically enclosed
*/
Scope get enclosingScope => _enclosingScope;
Element lookup3(String name, LibraryElement referencingLibrary) {
Element element = localLookup(name, referencingLibrary);
if (element != null) {
return element;
}
return _enclosingScope.lookup3(name, referencingLibrary);
}
}
/**
* Instances of the class {@code FunctionScope} implement the scope defined by a function.
*/
class FunctionScope extends EnclosedScope {
/**
* Initialize a newly created scope enclosed within another scope.
* @param enclosingScope the scope in which this scope is lexically enclosed
* @param functionElement the element representing the type represented by this scope
*/
FunctionScope(Scope enclosingScope, ExecutableElement functionElement) : super(new EnclosedScope(enclosingScope)) {
defineParameters(functionElement);
}
/**
* Define the parameters for the given function in the scope that encloses this function.
* @param functionElement the element representing the function represented by this scope
*/
void defineParameters(ExecutableElement functionElement) {
Scope parameterScope = enclosingScope;
if (functionElement.enclosingElement is ExecutableElement) {
String name16 = functionElement.name;
if (name16 != null && !name16.isEmpty) {
parameterScope.define(functionElement);
}
}
for (ParameterElement parameter in functionElement.parameters) {
if (!parameter.isInitializingFormal()) {
parameterScope.define(parameter);
}
}
}
}
/**
* Instances of the class {@code FunctionTypeScope} implement the scope defined by a function type
* alias.
*/
class FunctionTypeScope extends EnclosedScope {
/**
* Initialize a newly created scope enclosed within another scope.
* @param enclosingScope the scope in which this scope is lexically enclosed
* @param typeElement the element representing the type alias represented by this scope
*/
FunctionTypeScope(Scope enclosingScope, TypeAliasElement typeElement) : super(new EnclosedScope(enclosingScope)) {
defineTypeParameters(typeElement);
}
/**
* Define the type parameters for the function type alias.
* @param typeElement the element representing the type represented by this scope
*/
void defineTypeParameters(TypeAliasElement typeElement) {
Scope parameterScope = enclosingScope;
for (TypeVariableElement parameter in typeElement.typeVariables) {
parameterScope.define(parameter);
}
}
}
/**
* Instances of the class {@code LabelScope} represent a scope in which a single label is defined.
*/
class LabelScope {
/**
* The label scope enclosing this label scope.
*/
LabelScope _outerScope;
/**
* The label defined in this scope.
*/
String _label;
/**
* The element to which the label resolves.
*/
LabelElement _element;
/**
* The marker used to look up a label element for an unlabeled {@code break} or {@code continue}.
*/
static String EMPTY_LABEL = "";
/**
* The label element returned for scopes that can be the target of an unlabeled {@code break} or{@code continue}.
*/
static SimpleIdentifier _EMPTY_LABEL_IDENTIFIER = new SimpleIdentifier.full(new StringToken(TokenType.IDENTIFIER, "", 0));
/**
* Initialize a newly created scope to represent the potential target of an unlabeled{@code break} or {@code continue}.
* @param outerScope the label scope enclosing the new label scope
* @param onSwitchStatement {@code true} if this label is associated with a {@code switch}statement
* @param onSwitchMember {@code true} if this label is associated with a {@code switch} member
*/
LabelScope.con1(LabelScope outerScope, bool onSwitchStatement, bool onSwitchMember) {
_jtd_constructor_198_impl(outerScope, onSwitchStatement, onSwitchMember);
}
_jtd_constructor_198_impl(LabelScope outerScope, bool onSwitchStatement, bool onSwitchMember) {
_jtd_constructor_199_impl(outerScope, EMPTY_LABEL, new LabelElementImpl(_EMPTY_LABEL_IDENTIFIER, onSwitchStatement, onSwitchMember));
}
/**
* Initialize a newly created scope to represent the given label.
* @param outerScope the label scope enclosing the new label scope
* @param label the label defined in this scope
* @param element the element to which the label resolves
*/
LabelScope.con2(LabelScope outerScope2, String label3, LabelElement element18) {
_jtd_constructor_199_impl(outerScope2, label3, element18);
}
_jtd_constructor_199_impl(LabelScope outerScope2, String label3, LabelElement element18) {
this._outerScope = outerScope2;
this._label = label3;
this._element = element18;
}
/**
* Return the label element corresponding to the given label, or {@code null} if the given label
* is not defined in this scope.
* @param targetLabel the label being looked up
* @return the label element corresponding to the given label
*/
LabelElement lookup(SimpleIdentifier targetLabel) => lookup2(targetLabel.name);
/**
* Return the label element corresponding to the given label, or {@code null} if the given label
* is not defined in this scope.
* @param targetLabel the label being looked up
* @return the label element corresponding to the given label
*/
LabelElement lookup2(String targetLabel) {
if (_label == targetLabel) {
return _element;
} else if (_outerScope != null) {
return _outerScope.lookup2(targetLabel);
} else {
return null;
}
}
}
/**
* Instances of the class {@code LibraryImportScope} represent the scope containing all of the names
* available from imported libraries.
*/
class LibraryImportScope extends Scope {
/**
* The element representing the library in which this scope is enclosed.
*/
LibraryElement _definingLibrary;
/**
* The listener that is to be informed when an error is encountered.
*/
AnalysisErrorListener _errorListener;
/**
* A list of the namespaces representing the names that are available in this scope from imported
* libraries.
*/
List<Namespace> _importedNamespaces = new List<Namespace>();
/**
* Initialize a newly created scope representing the names imported into the given library.
* @param definingLibrary the element representing the library that imports the names defined in
* this scope
* @param errorListener the listener that is to be informed when an error is encountered
*/
LibraryImportScope(LibraryElement definingLibrary, AnalysisErrorListener errorListener) {
this._definingLibrary = definingLibrary;
this._errorListener = errorListener;
createImportedNamespaces(definingLibrary);
}
void define(Element element) {
if (!Scope.isPrivateName(element.name)) {
super.define(element);
}
}
LibraryElement get definingLibrary => _definingLibrary;
AnalysisErrorListener get errorListener => _errorListener;
Element lookup3(String name, LibraryElement referencingLibrary) {
if (Scope.isPrivateName(name)) {
return null;
}
Element foundElement = localLookup(name, referencingLibrary);
if (foundElement != null) {
return foundElement;
}
for (Namespace nameSpace in _importedNamespaces) {
Element element = nameSpace.get(name);
if (element != null) {
if (foundElement == null) {
foundElement = element;
} else {
foundElement = new MultiplyDefinedElementImpl(_definingLibrary.context, foundElement, element);
}
}
}
if (foundElement != null) {
defineWithoutChecking(foundElement);
}
return foundElement;
}
/**
* Create all of the namespaces associated with the libraries imported into this library. The
* names are not added to this scope, but are stored for later reference.
* @param definingLibrary the element representing the library that imports the libraries for
* which namespaces will be created
*/
void createImportedNamespaces(LibraryElement definingLibrary) {
NamespaceBuilder builder = new NamespaceBuilder();
for (ImportElement element in definingLibrary.imports) {
_importedNamespaces.add(builder.createImportNamespace(element));
}
}
}
/**
* Instances of the class {@code LibraryScope} implement a scope containing all of the names defined
* in a given library.
*/
class LibraryScope extends EnclosedScope {
/**
* Initialize a newly created scope representing the names defined in the given library.
* @param definingLibrary the element representing the library represented by this scope
* @param errorListener the listener that is to be informed when an error is encountered
*/
LibraryScope(LibraryElement definingLibrary, AnalysisErrorListener errorListener) : super(new LibraryImportScope(definingLibrary, errorListener)) {
defineTopLevelNames(definingLibrary);
}
/**
* Add to this scope all of the public top-level names that are defined in the given compilation
* unit.
* @param compilationUnit the compilation unit defining the top-level names to be added to this
* scope
*/
void defineLocalNames(CompilationUnitElement compilationUnit) {
for (PropertyAccessorElement element in compilationUnit.accessors) {
define(element);
}
for (FunctionElement element in compilationUnit.functions) {
define(element);
}
for (TypeAliasElement element in compilationUnit.typeAliases) {
define(element);
}
for (ClassElement element in compilationUnit.types) {
define(element);
}
for (VariableElement element in compilationUnit.variables) {
define(element);
}
}
/**
* Add to this scope all of the names that are explicitly defined in the given library.
* @param definingLibrary the element representing the library that defines the names in this
* scope
*/
void defineTopLevelNames(LibraryElement definingLibrary) {
for (PrefixElement prefix in definingLibrary.prefixes) {
define(prefix);
}
defineLocalNames(definingLibrary.definingCompilationUnit);
for (CompilationUnitElement compilationUnit in definingLibrary.parts) {
defineLocalNames(compilationUnit);
}
}
}
/**
* Instances of the class {@code Namespace} implement a mapping of identifiers to the elements
* represented by those identifiers. Namespaces are the building blocks for scopes.
*/
class Namespace {
/**
* A table mapping names that are defined in this namespace to the element representing the thing
* declared with that name.
*/
Map<String, Element> _definedNames = new Map<String, Element>();
/**
* Initialize a newly created namespace to have the given defined names.
* @param definedNames the mapping from names that are defined in this namespace to the
* corresponding elements
*/
Namespace(Map<String, Element> definedNames) {
this._definedNames = definedNames;
}
/**
* Return the element in this namespace that is available to the containing scope using the given
* name.
* @param name the name used to reference the
* @return the element represented by the given identifier
*/
Element get(String name) => _definedNames[name];
/**
* Return a table containing the same mappings as those defined by this namespace.
* @return a table containing the same mappings as those defined by this namespace
*/
Map<String, Element> get definedNames => new Map<String, Element>();
}
/**
* Instances of the class {@code NamespaceBuilder} are used to build a {@code Namespace}. Namespace
* builders are thread-safe and re-usable.
*/
class NamespaceBuilder {
/**
* Initialize a newly created namespace builder.
*/
NamespaceBuilder() : super() {
}
/**
* Create a namespace representing the export namespace of the given library.
* @param library the library whose export namespace is to be created
* @return the export namespace that was created
*/
Namespace createExportNamespace(LibraryElement library) => new Namespace(createExportMapping(library, new Set<LibraryElement>()));
/**
* Create a namespace representing the import namespace of the given library.
* @param library the library whose import namespace is to be created
* @return the import namespace that was created
*/
Namespace createImportNamespace(ImportElement element) {
Map<String, Element> definedNames = createExportMapping(element.importedLibrary, new Set<LibraryElement>());
definedNames = apply(definedNames, element.combinators);
definedNames = apply2(definedNames, element.prefix);
return new Namespace(definedNames);
}
/**
* Create a namespace representing the public namespace of the given library.
* @param library the library whose public namespace is to be created
* @return the public namespace that was created
*/
Namespace createPublicNamespace(LibraryElement library) {
Map<String, Element> definedNames = new Map<String, Element>();
addPublicNames(definedNames, library.definingCompilationUnit);
for (CompilationUnitElement compilationUnit in library.parts) {
addPublicNames(definedNames, compilationUnit);
}
return new Namespace(definedNames);
}
/**
* Add all of the names in the given namespace to the given mapping table.
* @param definedNames the mapping table to which the names in the given namespace are to be added
* @param namespace the namespace containing the names to be added to this namespace
*/
void addAll(Map<String, Element> definedNames, Map<String, Element> newNames) {
for (MapEntry<String, Element> entry in getMapEntrySet(newNames)) {
definedNames[entry.getKey()] = entry.getValue();
}
}
/**
* Add all of the names in the given namespace to the given mapping table.
* @param definedNames the mapping table to which the names in the given namespace are to be added
* @param namespace the namespace containing the names to be added to this namespace
*/
void addAll2(Map<String, Element> definedNames2, Namespace namespace) {
addAll(definedNames2, namespace.definedNames);
}
/**
* Add the given element to the given mapping table if it has a publicly visible name.
* @param definedNames the mapping table to which the public name is to be added
* @param element the element to be added
*/
void addIfPublic(Map<String, Element> definedNames, Element element) {
String name17 = element.name;
if (name17 != null && !Scope.isPrivateName(name17)) {
definedNames[name17] = element;
}
}
/**
* Add to the given mapping table all of the public top-level names that are defined in the given
* compilation unit.
* @param definedNames the mapping table to which the public names are to be added
* @param compilationUnit the compilation unit defining the top-level names to be added to this
* namespace
*/
void addPublicNames(Map<String, Element> definedNames, CompilationUnitElement compilationUnit) {
for (PropertyAccessorElement element in compilationUnit.accessors) {
addIfPublic(definedNames, element);
}
for (FunctionElement element in compilationUnit.functions) {
addIfPublic(definedNames, element);
}
for (TypeAliasElement element in compilationUnit.typeAliases) {
addIfPublic(definedNames, element);
}
for (ClassElement element in compilationUnit.types) {
addIfPublic(definedNames, element);
}
for (VariableElement element in compilationUnit.variables) {
addIfPublic(definedNames, element);
}
}
/**
* Apply the given combinators to all of the names in the given mapping table.
* @param definedNames the mapping table to which the namespace operations are to be applied
* @param combinators the combinators to be applied
*/
Map<String, Element> apply(Map<String, Element> definedNames, List<NamespaceCombinator> combinators) {
for (NamespaceCombinator combinator in combinators) {
if (combinator is __imp_combi.HideCombinator) {
hide(definedNames, ((combinator as __imp_combi.HideCombinator)).hiddenNames);
} else if (combinator is __imp_combi.ShowCombinator) {
definedNames = show(definedNames, ((combinator as __imp_combi.ShowCombinator)).shownNames);
} else {
AnalysisEngine.instance.logger.logError("Unknown type of combinator: ${combinator.runtimeType.toString()}");
}
}
return definedNames;
}
/**
* Apply the given prefix to all of the names in the table of defined names.
* @param definedNames the names that were defined before this operation
* @param prefixElement the element defining the prefix to be added to the names
*/
Map<String, Element> apply2(Map<String, Element> definedNames, PrefixElement prefixElement) {
if (prefixElement != null) {
String prefix = prefixElement.name;
Map<String, Element> newNames = new Map<String, Element>();
for (MapEntry<String, Element> entry in getMapEntrySet(definedNames)) {
newNames["${prefix}.${entry.getKey()}"] = entry.getValue();
}
return newNames;
} else {
return definedNames;
}
}
/**
* Create a mapping table representing the export namespace of the given library.
* @param library the library whose public namespace is to be created
* @param visitedElements a set of libraries that do not need to be visited when processing the
* export directives of the given library because all of the names defined by them will
* be added by another library
* @return the mapping table that was created
*/
Map<String, Element> createExportMapping(LibraryElement library, Set<LibraryElement> visitedElements) {
javaSetAdd(visitedElements, library);
try {
Map<String, Element> definedNames = new Map<String, Element>();
for (ExportElement element in library.exports) {
LibraryElement exportedLibrary3 = element.exportedLibrary;
if (!visitedElements.contains(exportedLibrary3)) {
Map<String, Element> exportedNames = createExportMapping(exportedLibrary3, visitedElements);
exportedNames = apply(exportedNames, element.combinators);
addAll(definedNames, exportedNames);
}
}
addAll2(definedNames, ((library.context as AnalysisContextImpl)).getPublicNamespace(library));
return definedNames;
} finally {
visitedElements.remove(library);
}
}
/**
* Hide all of the given names by removing them from the given collection of defined names.
* @param definedNames the names that were defined before this operation
* @param hiddenNames the names to be hidden
*/
void hide(Map<String, Element> definedNames, List<String> hiddenNames) {
for (String name in hiddenNames) {
definedNames.remove(name);
}
}
/**
* Show only the given names by removing all other names from the given collection of defined
* names.
* @param definedNames the names that were defined before this operation
* @param shownNames the names to be shown
*/
Map<String, Element> show(Map<String, Element> definedNames, List<String> shownNames) {
Map<String, Element> newNames = new Map<String, Element>();
for (String name in shownNames) {
Element element = definedNames[name];
if (element != null) {
newNames[name] = element;
}
}
return newNames;
}
}
/**
* The abstract class {@code Scope} defines the behavior common to name scopes used by the resolver
* to determine which names are visible at any given point in the code.
*/
abstract class Scope {
/**
* The prefix used to mark an identifier as being private to its library.
*/
static String PRIVATE_NAME_PREFIX = "_";
/**
* The suffix added to the declared name of a setter when looking up the setter. Used to
* disambiguate between a getter and a setter that have the same name.
*/
static String SETTER_SUFFIX = "=";
/**
* The name used to look up the method used to implement the unary minus operator. Used to
* disambiguate between the unary and binary operators.
*/
static String UNARY_MINUS = "unary-";
/**
* Return {@code true} if the given name is a library-private name.
* @param name the name being tested
* @return {@code true} if the given name is a library-private name
*/
static bool isPrivateName(String name) => name != null && name.startsWith(PRIVATE_NAME_PREFIX);
/**
* A table mapping names that are defined in this scope to the element representing the thing
* declared with that name.
*/
Map<String, Element> _definedNames = new Map<String, Element>();
/**
* Initialize a newly created scope to be empty.
*/
Scope() : super() {
}
/**
* Add the given element to this scope. If there is already an element with the given name defined
* in this scope, then an error will be generated and the original element will continue to be
* mapped to the name. If there is an element with the given name in an enclosing scope, then a
* warning will be generated but the given element will hide the inherited element.
* @param element the element to be added to this scope
*/
void define(Element element) {
String name = getName(element);
if (_definedNames.containsKey(name)) {
errorListener.onError(getErrorForDuplicate(_definedNames[name], element));
} else {
Element overriddenElement = lookup3(name, definingLibrary);
if (overriddenElement != null) {
AnalysisError error = getErrorForHiding(overriddenElement, element);
if (error != null) {
errorListener.onError(error);
}
}
_definedNames[name] = element;
}
}
/**
* Return the element with which the given identifier is associated, or {@code null} if the name
* is not defined within this scope.
* @param identifier the identifier associated with the element to be returned
* @param referencingLibrary the library that contains the reference to the name, used to
* implement library-level privacy
* @return the element with which the given identifier is associated
*/
Element lookup(Identifier identifier, LibraryElement referencingLibrary) => lookup3(identifier.name, referencingLibrary);
/**
* Add the given element to this scope without checking for duplication or hiding.
* @param element the element to be added to this scope
*/
void defineWithoutChecking(Element element) {
_definedNames[getName(element)] = element;
}
/**
* Return the element representing the library in which this scope is enclosed.
* @return the element representing the library in which this scope is enclosed
*/
LibraryElement get definingLibrary;
/**
* Return the error code to be used when reporting that a name being defined locally conflicts
* with another element of the same name in the local scope.
* @param existing the first element to be declared with the conflicting name
* @param duplicate another element declared with the conflicting name
* @return the error code used to report duplicate names within a scope
*/
AnalysisError getErrorForDuplicate(Element existing, Element duplicate) => new AnalysisError.con1(source, ResolverErrorCode.DUPLICATE_MEMBER_ERROR, [existing.name]);
/**
* Return the error code to be used when reporting that a name being defined locally hides a name
* defined in an outer scope.
* @param hidden the element whose visibility is being hidden
* @param hiding the element that is hiding the visibility of another declaration
* @return the error code used to report name hiding
*/
AnalysisError getErrorForHiding(Element hidden, Element hiding) => new AnalysisError.con1(source, ResolverErrorCode.DUPLICATE_MEMBER_WARNING, [hidden.name]);
/**
* Return the listener that is to be informed when an error is encountered.
* @return the listener that is to be informed when an error is encountered
*/
AnalysisErrorListener get errorListener;
/**
* Return the source object representing the compilation unit with which errors related to this
* scope should be associated.
* @return the source object with which errors should be associated
*/
Source get source => definingLibrary.definingCompilationUnit.source;
/**
* Return the element with which the given name is associated, or {@code null} if the name is not
* defined within this scope. This method only returns elements that are directly defined within
* this scope, not elements that are defined in an enclosing scope.
* @param name the name associated with the element to be returned
* @param referencingLibrary the library that contains the reference to the name, used to
* implement library-level privacy
* @return the element with which the given name is associated
*/
Element localLookup(String name, LibraryElement referencingLibrary) => _definedNames[name];
/**
* Return the element with which the given name is associated, or {@code null} if the name is not
* defined within this scope.
* @param name the name associated with the element to be returned
* @param referencingLibrary the library that contains the reference to the name, used to
* implement library-level privacy
* @return the element with which the given name is associated
*/
Element lookup3(String name, LibraryElement referencingLibrary);
/**
* Return the name that will be used to look up the given element.
* @param element the element whose look-up name is to be returned
* @return the name that will be used to look up the given element
*/
String getName(Element element) {
if (element is MethodElement) {
MethodElement method = (element as MethodElement);
if (method.name == "-" && method.parameters.length == 0) {
return UNARY_MINUS;
}
} else if (element is PropertyAccessorElement) {
PropertyAccessorElement accessor = (element as PropertyAccessorElement);
if (accessor.isSetter()) {
return "${accessor.name}${SETTER_SUFFIX}";
}
}
return element.name;
}
}
/**
* The enumeration {@code ResolverErrorCode} defines the error codes used for errors detected by the
* resolver. 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 ResolverErrorCode implements ErrorCode {
static final ResolverErrorCode BREAK_LABEL_ON_SWITCH_MEMBER = new ResolverErrorCode('BREAK_LABEL_ON_SWITCH_MEMBER', 0, ErrorType.COMPILE_TIME_ERROR, "Break label resolves to case or default statement");
static final ResolverErrorCode CANNOT_BE_RESOLVED = new ResolverErrorCode('CANNOT_BE_RESOLVED', 1, ErrorType.STATIC_WARNING, "Cannot resolve the name '%s'");
static final ResolverErrorCode CONTINUE_LABEL_ON_SWITCH = new ResolverErrorCode('CONTINUE_LABEL_ON_SWITCH', 2, ErrorType.COMPILE_TIME_ERROR, "A continue label resolves to switch, must be loop or switch member");
/**
* It is a compile-time error if [the URI] is not a compile-time constant, or if [the URI]
* involves string interpolation.
*/
static final ResolverErrorCode INVALID_URI = new ResolverErrorCode('INVALID_URI', 3, ErrorType.COMPILE_TIME_ERROR, "URI's used in directives must be compile time constants without interpolation expressions");
static final ResolverErrorCode LABEL_IN_OUTER_SCOPE = new ResolverErrorCode('LABEL_IN_OUTER_SCOPE', 4, ErrorType.COMPILE_TIME_ERROR, "Cannot reference label '%s' declared in an outer method or function");
static final ResolverErrorCode MISSING_LIBRARY_DIRECTIVE_IMPORTED = new ResolverErrorCode('MISSING_LIBRARY_DIRECTIVE_IMPORTED', 5, ErrorType.COMPILE_TIME_ERROR, "Libraries that are imported by other libraries must have a library directive");
static final ResolverErrorCode MISSING_LIBRARY_DIRECTIVE_WITH_PART = new ResolverErrorCode('MISSING_LIBRARY_DIRECTIVE_WITH_PART', 6, ErrorType.COMPILE_TIME_ERROR, "Libraries that have parts must have a library directive");
static final ResolverErrorCode MISSING_PART_OF_DIRECTIVE = new ResolverErrorCode('MISSING_PART_OF_DIRECTIVE', 7, ErrorType.COMPILE_TIME_ERROR, "The included part must have a part-of directive");
static final ResolverErrorCode NON_BOOLEAN_CONDITION = new ResolverErrorCode('NON_BOOLEAN_CONDITION', 8, ErrorType.STATIC_TYPE_WARNING, "Conditions must have a static type of 'bool'");
static final ResolverErrorCode PART_WITH_WRONG_LIBRARY_NAME = new ResolverErrorCode('PART_WITH_WRONG_LIBRARY_NAME', 9, ErrorType.STATIC_WARNING, "The included part appears to be part of the library '%s'");
static final ResolverErrorCode UNDEFINED_LABEL = new ResolverErrorCode('UNDEFINED_LABEL', 10, ErrorType.COMPILE_TIME_ERROR, "The label '%s' is not defined");
static final ResolverErrorCode DUPLICATE_MEMBER_ERROR = new ResolverErrorCode('DUPLICATE_MEMBER_ERROR', 11, ErrorType.COMPILE_TIME_ERROR, "Duplicate member '%s'");
static final ResolverErrorCode DUPLICATE_MEMBER_WARNING = new ResolverErrorCode('DUPLICATE_MEMBER_WARNING', 12, ErrorType.STATIC_WARNING, "Duplicate member '%s'");
static final List<ResolverErrorCode> values = [BREAK_LABEL_ON_SWITCH_MEMBER, CANNOT_BE_RESOLVED, CONTINUE_LABEL_ON_SWITCH, INVALID_URI, LABEL_IN_OUTER_SCOPE, MISSING_LIBRARY_DIRECTIVE_IMPORTED, MISSING_LIBRARY_DIRECTIVE_WITH_PART, MISSING_PART_OF_DIRECTIVE, NON_BOOLEAN_CONDITION, PART_WITH_WRONG_LIBRARY_NAME, UNDEFINED_LABEL, DUPLICATE_MEMBER_ERROR, DUPLICATE_MEMBER_WARNING];
final String __name;
final int __ordinal;
/**
* The type of this error.
*/
ErrorType _type;
/**
* The message template used to create the message to be displayed for this error.
*/
String _message;
/**
* Initialize a newly created error code to have the given type and message.
* @param type the type of this error
* @param message the message template used to create the message to be displayed for the error
*/
ResolverErrorCode(this.__name, this.__ordinal, ErrorType type, String message) {
this._type = type;
this._message = message;
}
ErrorSeverity get errorSeverity => _type.severity;
String get message => _message;
ErrorType get type => _type;
bool needsRecompilation() => true;
String toString() => __name;
}