| // Copyright (c) 2023, 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. |
| |
| /// Test that implicit generic function instantiations are inserted based on |
| /// the pattern's context type, but not when destructuring. |
| |
| import "package:expect/expect.dart"; |
| |
| main() { |
| // Does not instantiate during destructuring. Therefore, these are errors |
| // because the type of the value isn't assignable to the pattern's type. |
| (TFn,) record = (id,); |
| var (IntFn b,) = record; |
| // ^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.PATTERN_TYPE_MISMATCH_IN_IRREFUTABLE_CONTEXT |
| // ^ |
| // [cfe] The matched value of type 'T Function<T>(T)' isn't assignable to the required type 'int Function(int)'. |
| |
| List<TFn> list = [id]; |
| var [IntFn c] = list; |
| // ^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.PATTERN_TYPE_MISMATCH_IN_IRREFUTABLE_CONTEXT |
| // ^ |
| // [cfe] The matched value of type 'T Function<T>(T)' isn't assignable to the required type 'int Function(int)'. |
| |
| Map<String, TFn> map = {'x': id}; |
| var {'x': IntFn d} = map; |
| // ^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.PATTERN_TYPE_MISMATCH_IN_IRREFUTABLE_CONTEXT |
| // ^ |
| // [cfe] The matched value of type 'T Function<T>(T)' isn't assignable to the required type 'int Function(int)'. |
| |
| Box<TFn> box = Box(id); |
| var Box<TFn>(value: IntFn e) = box; |
| // ^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.PATTERN_TYPE_MISMATCH_IN_IRREFUTABLE_CONTEXT |
| // ^ |
| // [cfe] The matched value of type 'T Function<T>(T)' isn't assignable to the required type 'int Function(int)'. |
| } |
| |
| T id<T>(T t) => t; |
| |
| class Box<T> { |
| final T value; |
| Box(this.value); |
| } |
| |
| typedef IntFn = int Function(int); |
| typedef TFn = T Function<T>(T); |