Erik Ernst
e05ce41c0d
This CL adds an implementation of anonymous `=>` methods in the CFE which is sufficiently complete to handle the existing test cases in language/anonymous_methods/expression. Coverage is handled by adding magic comments to ignore the fact that new code is not covered by existing testcases. This will be settled in a separate CL. To keep the failures visible, the failures in configurations dart2js-hostasserts-linux-d8-try, dart2js-linux-chrome-try, dart2js-minified-linux-d8-try, and ddc-linux-chrome-try have not been approved. It seems likely to me that those are bugs in dart2js and in DDC. Change-Id: Ia70fedd4de6166d6a3bf8a108f49728b6e16c9f6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/494440 Commit-Queue: Erik Ernst <eernst@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
60 lines
2.2 KiB
Dart
60 lines
2.2 KiB
Dart
// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// SharedOptions=--enable-experiment=anonymous-methods
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// This test confirms that compile-time errors specific to the
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// 'anonymous-methods' feature are emitted as expected.
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void main() {
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// Zero parameters.
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1.() => 1;
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// ^^
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// [analyzer] SYNTACTIC_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_LIST
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// [cfe] An anonymous method with a parameter list must have exactly one required, positional parameter.
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// Multiple parameters.
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1.(a, b) => 1;
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// ^^^^^^
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// [analyzer] SYNTACTIC_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_LIST
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// [cfe] An anonymous method with a parameter list must have exactly one required, positional parameter.
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// An optional positional parameter.
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1.([a]) => 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_LIST
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// [cfe] An anonymous method with a parameter list must have exactly one required, positional parameter.
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// An optional named parameter.
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1.({a}) => 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_LIST
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// [cfe] An anonymous method with a parameter list must have exactly one required, positional parameter.
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// A required named parameter.
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1.({required a}) => 1;
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// ^^^^^^^^^^^^^^
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// [analyzer] SYNTACTIC_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_LIST
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// [cfe] An anonymous method with a parameter list must have exactly one required, positional parameter.
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// A parameter type mismatch.
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"".(int i) => 1;
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// ^^^
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// [analyzer] COMPILE_TIME_ERROR.ANONYMOUS_METHOD_WRONG_PARAMETER_TYPE
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// [cfe] The receiver type 'String' must be assignable to the formal parameter type 'int' in an anonymous method.
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// Using a void value as receiver.
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(StringBuffer('').=> print('0')).toString();
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//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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// [analyzer] COMPILE_TIME_ERROR.USE_OF_VOID_RESULT
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// ^
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// [cfe] This expression has type 'void' and can't be used.
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(StringBuffer('').=> print('0')).=> print('1');
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//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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// [analyzer] COMPILE_TIME_ERROR.USE_OF_VOID_RESULT
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// ^
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// [cfe] This expression has type 'void' and can't be used.
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}
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