blob: c5cccc0b67fdadae1a60b86241e8e3492211b348 [file] [log] [blame]
// Copyright (c) 2020, 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.
/// @assertion If a class [C] in an opted-in library implements the same generic
/// class [I] more than once as [I0], .., [In], and at least one of the [Ii] is
/// not syntactically equal to the others, then it is an error if
/// [NNBD_TOP_MERGE(S0, ..., Sn)] is not defined where [Si] is [NORM(Ii)].
/// Otherwise, for the purposes of runtime subtyping checks, [C] is considered to
/// implement the canonical interface given by [NNBD_TOP_MERGE(S0, ..., Sn)].
/// @description Check that error occurs as a result of [NNBD_TOP_MERGE] of
/// [int?] vs [Function], [Function?].
/// @author
class A<T> {}
class B implements A<int?> {}
class C_Function implements A<Function> {}
class C_nullable_Function implements A<Function?> {}
class D_Function extends B implements C_Function {}
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
class D_Function1 extends C_Function implements B {}
// ^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
class D_nullable_Function extends B implements C_nullable_Function {}
// ^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
class D_nullable_Function1 extends C_nullable_Function implements B {}
// ^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
void main() {}