| // Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion It is a compile-time error if a record type has any of: |
| /// |
| /// The same field name more than once. This is true even if one or both of the |
| /// colliding fields is positional. We could permit collisions with positional |
| /// field names since they are only used for documentation, but we disallow it |
| /// because it's confusing and not useful. |
| /// |
| /// Only one positional field and no trailing comma. This isn't ambiguous, since |
| /// there are no parenthesized type expressions in Dart. But prohibiting this is |
| /// symmetric with record expressions and leaves the potential for later support |
| /// for parentheses for grouping in type expressions. |
| /// |
| /// A field named hashCode, runtimeType, noSuchMethod, or toString. |
| /// |
| /// A field name that starts with an underscore. |
| /// |
| /// A field name that collides with the synthesized getter name of a positional |
| /// field. For example: (int, $1: int) since the named field '$1' collides with |
| /// the getter for the first positional field. |
| /// |
| /// @description Checks that it is a compile-time error if record contains a |
| /// positional field named `toString` |
| /// @author sgrekhov22@gmail.com |
| |
| typedef R1 = (String toString, {String s}); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| typedef (String toString, {int i}) R2(); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| typedef void R3((String toString, {String s}) r); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| (int toString, {int x}) foo() => (42, x: 0); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| void bar((String toString, {bool b}) r) {} |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| main() { |
| (int toString, {String s}) r1 = (42, s: ""); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| (double toString, {int i}) r2 = (3.14, i: 42); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| dynamic d = ("1", 3.14); |
| if (d is (String toString, {String s})) { |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
| |
| d as (String toString, {double i}); |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
