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1 // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file | |
2 // for details. All rights reserved. Use of this source code is governed by a | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 | |
5 /*@testedFeatures=inference*/ | |
6 library test; | |
7 | |
8 import 'dart:async'; | |
9 | |
10 class MyFuture<T> implements Future<T> { | |
11 MyFuture() {} | |
12 MyFuture.value([x]) {} | |
13 dynamic noSuchMethod(invocation); | |
14 MyFuture<S> then<S>(dynamic f(T x), {Function onError}) => null; | |
15 } | |
16 | |
17 MyFuture f; | |
18 // Instantiates Future<int> | |
19 Future<int> t1 = f.then(/*@returnType=Future<int>*/ (/*@type=dynamic*/ _) => | |
20 /*@typeArgs=int*/ new Future.value('hi')); | |
21 | |
22 // Instantiates List<int> | |
23 Future<List<int>> t2 = f.then( | |
24 /*@returnType=List<int>*/ (/*@type=dynamic*/ _) => /*@typeArgs=int*/ [3]); | |
25 Future<List<int>> g2() async { | |
26 return /*@typeArgs=int*/ [3]; | |
27 } | |
28 | |
29 Future<List<int>> g3() async { | |
30 return /*@typeArgs=List<int>*/ new Future.value( | |
31 /*@typeArgs=int*/ [3]); | |
32 } | |
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