blob: 4764ae8719c05e68b44141fa1b9757afc1e8166a [file] [log] [blame]
// Copyright (c) 2021, 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 We will introduce syntax allowing you to explicitly instantiate a
/// function tear-off and a type literal for a generic class. The former for
/// consistency with constructor tear-offs, the latter to introduce in-line
/// types without needing a typedef, like we did for function types. And we do
/// both now because they share the same grammar productions.
/// Example:
/// T id<T>(T value) => value;
/// var idInt = id<int>; // Explicitly instantiated tear-off, saves on writing function types.
/// and
/// Type intList = List<int>; // In-line instantiated type literal.
/// @description Checks example from the Spec.
/// @author
// SharedOptions=--enable-experiment=constructor-tearoffs
import "../../Utils/expect.dart";
T id<T>(T value) => value;
var idInt = id<int>;
main() {
int i = idInt(4);
Expect.equals(4, i);
i = idInt(-1);
Expect.equals(-1, i);
i = idInt(0);
Expect.equals(0, i);