Robert Nystrom
739852d99d
Change-Id: I3356296e72dfa07b0ac994da0ce96f766b182e80 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137722 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Leaf Petersen <leafp@google.com>
116 lines
2.4 KiB
Dart
116 lines
2.4 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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// Dart test program to test arithmetic operations.
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import "dart:async";
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import "package:expect/expect.dart";
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class B {}
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class C {
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B? call(B? b) => b;
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}
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typedef B? BToB(B? x);
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typedef Object? NullToObject(Null x);
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C c = new C();
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void check1(BToB f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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B b = new B();
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Expect.identical(f(b), b);
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}
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void check2(FutureOr<BToB> f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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BToB f2 = f as BToB;
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Expect.identical(f, f2);
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B b = new B();
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Expect.identical(f2(b), b);
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}
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void check3(NullToObject f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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Expect.isNull(f(null));
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}
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void check4(FutureOr<NullToObject> f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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NullToObject f2 = f as NullToObject;
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Expect.identical(f, f2);
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Expect.isNull(f2(null));
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}
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void check5(Function f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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B b = new B();
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Expect.identical(f(b), b);
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}
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void check6(FutureOr<Function> f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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Function f2 = f as Function;
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Expect.identical(f, f2);
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B b = new B();
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Expect.identical(f2(b), b);
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}
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void check7(C x) {
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Expect.identical(c, x);
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}
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void check8(FutureOr<C> x) {
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Expect.identical(c, x);
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}
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void check9(Object o) {
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Expect.identical(c, o);
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}
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void check10(FutureOr<Object> o) {
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Expect.identical(c, o);
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}
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void check11(dynamic d) {
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Expect.identical(c, d);
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}
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void check12(FutureOr<dynamic> d) {
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Expect.identical(c, d);
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}
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void checkNullableFunction(BToB? f) {
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Expect.isFalse(identical(c, f));
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Expect.equals(c.call, f);
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B b = new B();
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Expect.identical(f!(b), b);
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}
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main() {
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// Implicitly tears off c.call
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check1(c); //# 01: ok
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check2(c); //# 02: ok
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check3(c); //# 03: ok
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check4(c); //# 04: ok
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check5(c); //# 05: ok
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check6(c); //# 06: ok
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// Does not tear off c.call
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check7(c); //# 07: ok
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check8(c); //# 08: ok
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check9(c); //# 09: ok
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check10(c); //# 10: ok
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check11(c); //# 11: ok
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check12(c); //# 12: ok
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// Implicitly tears off c.call even when the context type is nullable.
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checkNullableFunction(c); //# 13: ok
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}
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