| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'package:async_helper/async_helper.dart'; |
| import 'package:expect/expect.dart'; |
| |
| import 'compiler_helper.dart'; |
| |
| const String TEST = """ |
| var a = ''; |
| class A { |
| operator+(other) => other; |
| } |
| |
| foo() { |
| // The following '+' call will first say that it may call A::+, |
| // String::+, or int::+. After all methods have been analyzed, we know |
| // that a is of type String, and therefore, this method cannot call |
| // A::+. Therefore, the type of the parameter of A::+ will be the |
| // one given by the other calls. |
| return a + 'foo'; |
| } |
| |
| main() { |
| new A() + 42; |
| foo(); |
| } |
| """; |
| |
| |
| void main() { |
| Uri uri = new Uri(scheme: 'source'); |
| var compiler = compilerFor(TEST, uri); |
| asyncTest(() => compiler.run(uri).then((_) { |
| var typesInferrer = compiler.typesTask.typesInferrer; |
| |
| checkReturnInClass(String className, String methodName, type) { |
| var cls = findElement(compiler, className); |
| var element = cls.lookupLocalMember(methodName); |
| Expect.equals(type, typesInferrer.getReturnTypeOfElement(element)); |
| } |
| |
| checkReturnInClass('A', '+', compiler.typesTask.uint31Type); |
| })); |
| } |