Vyacheslav Egorov
ed5b6a3e8e
Parameter types of local functions might refer to type arguments of the receiver which means that receiver needs to be captured even if it is not explicitly used inside a local function. Fixes https://github.com/dart-lang/sdk/issues/32204 Bug: 32204 Change-Id: I448f0c8cbce12e9b58e1c3de9b2630ee22031d92 Reviewed-on: https://dart-review.googlesource.com/42441 Commit-Queue: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
42 lines
1.1 KiB
Dart
42 lines
1.1 KiB
Dart
// Copyright (c) 2018, 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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// Verify that local functions capture `this` if their arguments refer to
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// type parameters from the enclosing class.
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import "package:expect/expect.dart";
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typedef void B<T>(T v);
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class MyFisk {}
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class MyHest {}
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class A<T> {
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var value;
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A(B<T> x) {
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// This function does not capture `this` explicitly, however it needs
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// to capture it in order to access T. Verify that we do it correctly.
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// If `this` is not captured then foo turns into (B<dynamic>) -> Null
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// which means that foo(x) would throw if T != dynamic.
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f(B<T> v) {}
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f(x);
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}
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foo<U>(B<T> x, B<U> y) {
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// This function does not capture `this` explicitly, verify that it still
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// can access `T`.
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f(B<T> v, B<U> y) {}
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f(x, y);
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}
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}
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void main() {
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new A<MyFisk>((MyFisk v) {});
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new A<MyFisk>((MyFisk v) {}).foo<MyHest>((MyFisk v) {}, (MyHest v) {});
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}
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