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2432ac4647
New scheme for checking function subtyping: 1) Generate an $isX predicate on objects that are statically known subtypes of a given function type 2) Generate a signature encoding the whole function type on objects when a runtime check is needed. A check succeeds if either 1) or 2) is true. If too many predicates are needed a signature is generated instead, and if a signature is needed, no predicates are generated. Maximum number of predicates is currently determined by the magic constant MAX_FUNCTION_TYPE_PREDICATES in emitter.dart. R=karlklose@google.com Committed: https://code.google.com/p/dart/source/detail?r=24286 Review URL: https://codereview.chromium.org//12334070 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24309 260f80e4-7a28-3924-810f-c04153c831b5
29 lines
816 B
Dart
29 lines
816 B
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Dart test program for constructors and initializers.
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// Check negative function subtyping tests.
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import 'package:expect/expect.dart';
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typedef void Foo<T>(T t);
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typedef void Bar(int i);
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class Class<T> {
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test(bool expectedResult, var o, String typeName) {
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void local() {
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Expect.equals(expectedResult, o is! Foo<T>, "bar is! Foo<$typeName>");
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Expect.isFalse(o is! Bar, "bar is! Bar");
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}
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local();
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}
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}
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void bar(int i) {}
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void main() {
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new Class().test(false, bar, "dynamic");
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new Class<int>().test(false, bar, "int");
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new Class<bool>().test(true, bar, "bool");
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} |