mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 09:31:58 +00:00
d14ab0779a
Change-Id: I9c486f29f3bcf8a6ecf481eb25ea61d0468049b2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150667 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>
52 lines
1.8 KiB
Dart
52 lines
1.8 KiB
Dart
// Copyright (c) 2019, 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 'dart:_runtime' show gFnType, typeRep, isSubtypeOf;
|
|
|
|
import 'package:expect/expect.dart';
|
|
|
|
/// Returns an unwrapped generic function type with a bounded type argument in
|
|
/// the form: <T extends [bound]> void -> void.
|
|
///
|
|
// TODO(nshahan): The generic function type is created as a legacy type.
|
|
genericFunction(bound) => gFnType((T) => [typeRep<void>(), []], (T) => [bound]);
|
|
|
|
/// Returns an unwrapped generic function type with a bounded type argument in
|
|
/// the form: <T extends [bound]> [argumentType] -> T.
|
|
///
|
|
// TODO(nshahan): The generic function type is created as a legacy type.
|
|
functionGenericReturn(bound, argumentType) => gFnType(
|
|
(T) => [
|
|
T,
|
|
[argumentType]
|
|
],
|
|
(T) => [bound]);
|
|
|
|
/// Returns an unwrapped generic function type with a bounded type argument in
|
|
/// the form: <T extends [bound]> T -> [returnType].
|
|
///
|
|
// TODO(nshahan): The generic function type is created as a legacy type.
|
|
functionGenericArg(bound, returnType) => gFnType(
|
|
(T) => [
|
|
returnType,
|
|
[T]
|
|
],
|
|
(T) => [bound]);
|
|
|
|
void checkSubtype(s, t) =>
|
|
Expect.isTrue(isSubtypeOf(s, t), '$s should be subtype of $t.');
|
|
|
|
void checkProperSubtype(s, t) {
|
|
Expect.isTrue(isSubtypeOf(s, t), '$s should be subtype of $t.');
|
|
checkSubtypeFailure(t, s);
|
|
}
|
|
|
|
void checkMutualSubtype(Object s, Object t) {
|
|
Expect.isTrue(isSubtypeOf(s, t), '$s should be subtype of $t.');
|
|
Expect.isTrue(isSubtypeOf(t, s), '$t should be subtype of $s.');
|
|
}
|
|
|
|
void checkSubtypeFailure(s, t) =>
|
|
Expect.isFalse(isSubtypeOf(s, t), '$s should not be subtype of $t.');
|