Language/12_Expressions/07_Maps_A07_t04.dart

/*
 * Copyright (c) 2011, 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 A runtime map literal <K, V>{k1:e1... kn :en}  is evaluated as follows:
 *   - First, the expression ki is evaluated yielding object ui, the ei is evaluated
 *     yielding object oi, for i ∈ 1..n in left to right order, yielding objects
 *     u1; o1 ... un; on. 
 *   - A fresh instance m whose class implements the built-in class Map<K, V> is allocated.
 *     The operator []= is invoked on m with first argument ui and second argument oi, i ∈ 1..n.
 *   - The result of the evaluation is m.
 * @description Checks that the result of a runtime map literal <String, V>{k1:e1... kn :en}
 * is an object that implements interface Map<String, V>.
 * @author msyabro
 * @reviewer rodionov
 */
import "../../Utils/expect.dart";

class C {}

main() {
  Expect.isTrue(<String, int> {"": 1} is Map<String, int>);
  Expect.isTrue(<String, String> {"": "string"} is Map<String, String>);
  Expect.isTrue(<String, bool> {"": true} is Map<String, bool>);
  Expect.isTrue(<String, C>{"": new C()} is Map<String, C>);
}