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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
48 lines
1.8 KiB
Dart
48 lines
1.8 KiB
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 function subtyping for local functions against generic typedefs.
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import 'package:expect/expect.dart';
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typedef int Foo<T>(T a, [String b]);
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typedef int Bar<T>(T a, [String b]);
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typedef int Baz<T>(T a, {String b});
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typedef int Boz<T>(T a);
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main() {
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int foo(bool a, [String b]) => null;
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int baz(bool a, {String b}) => null;
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Expect.isTrue(foo is Foo<bool>, 'foo is Foo<bool>');
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Expect.isTrue(foo is Bar<bool>, 'foo is Bar<bool>');
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Expect.isFalse(foo is Baz<bool>, 'foo is Baz<bool>');
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Expect.isTrue(foo is Boz<bool>, 'foo is Boz<bool>');
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Expect.isFalse(foo is Foo<int>, 'foo is Foo<int>');
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Expect.isFalse(foo is Bar<int>, 'foo is Bar<int>');
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Expect.isFalse(foo is Baz<int>, 'foo is Baz<int>');
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Expect.isFalse(foo is Boz<int>, 'foo is Boz<int>');
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Expect.isTrue(foo is Foo, 'foo is Foo');
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Expect.isTrue(foo is Bar, 'foo is Bar');
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Expect.isFalse(foo is Baz, 'foo is Baz');
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Expect.isTrue(foo is Boz, 'foo is Boz');
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Expect.isFalse(baz is Foo<bool>, 'baz is Foo<bool>');
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Expect.isFalse(baz is Bar<bool>, 'baz is Bar<bool>');
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Expect.isTrue(baz is Baz<bool>, 'baz is Baz<bool>');
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Expect.isTrue(baz is Boz<bool>, 'baz is Boz<bool>');
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Expect.isFalse(baz is Foo<int>, 'baz is Foo<int>');
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Expect.isFalse(baz is Bar<int>, 'baz is Bar<int>');
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Expect.isFalse(baz is Baz<int>, 'baz is Baz<int>');
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Expect.isFalse(baz is Boz<int>, 'baz is Boz<int>');
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Expect.isFalse(baz is Foo, 'baz is Foo');
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Expect.isFalse(baz is Bar, 'baz is Bar');
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Expect.isTrue(baz is Baz, 'baz is Baz');
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Expect.isTrue(baz is Boz, 'baz is Boz');
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} |