Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
64 lines
2.0 KiB
Dart
64 lines
2.0 KiB
Dart
// Copyright (c) 2017, 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:expect/expect.dart";
|
|
|
|
class A {}
|
|
|
|
abstract class B<T> {
|
|
// x will be marked genericCovariantInterface, since x's type is covariant in
|
|
// the type parameter T.
|
|
void f2(T x);
|
|
|
|
// x will be marked genericCovariantInterface, since x's type is covariant in
|
|
// the type parameter T.
|
|
void f3(T x);
|
|
|
|
void f4(Object x);
|
|
|
|
void f5(Object x) {
|
|
f4(x);
|
|
}
|
|
}
|
|
|
|
class C extends B<A> {
|
|
void f1(A x) {}
|
|
|
|
// x will be marked genericCovariantImpl, since it might be called via
|
|
// e.g. B<Object>.
|
|
void f2(A x) {}
|
|
|
|
// x will be marked genericCovariantImpl, since it might be called via
|
|
// e.g. B<Object>.
|
|
void f3(covariant A x) {}
|
|
|
|
void f4(covariant A x) {}
|
|
}
|
|
|
|
main() {
|
|
// Dynamic method calls should always have their arguments type checked.
|
|
dynamic d = new C();
|
|
Expect.throwsTypeError(() => d.f1(new Object())); //# 01: ok
|
|
|
|
// Closure calls should have any arguments marked "genericCovariantImpl" type
|
|
// checked.
|
|
B<Object> b = new C();
|
|
void Function(Object) f = b.f2;
|
|
Expect.throwsTypeError(() => f(new Object())); //# 02: ok
|
|
|
|
// Interface calls should have any arguments marked "genericCovariantImpl"
|
|
// type checked provided that the corresponding argument on the interface
|
|
// target is marked "genericCovariantInterface".
|
|
Expect.throwsTypeError(() => b.f2(new Object())); //# 03: ok
|
|
|
|
// Interface calls should have any arguments marked "covariant" type checked,
|
|
// regardless of whether the corresponding argument on the interface target is
|
|
// marked "genericCovariantInterface".
|
|
Expect.throwsTypeError(() => b.f3(new Object())); //# 04: ok
|
|
Expect.throwsTypeError(() => b.f4(new Object())); //# 05: ok
|
|
|
|
// This calls should have any arguments marked "covariant" type checked.
|
|
Expect.throwsTypeError(() => b.f5(new Object())); //# 06: ok
|
|
}
|