Language/12_Expressions/07_Maps_A07_t01.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 values in a map literal are evaluated in order from left to right.
 * @author msyabro
 * @reviewer kaigorodov
 */
import "../../Utils/expect.dart";

var evalOrder;

f(number) {
  evalOrder = '$evalOrder$number';
}

main() {
  evalOrder = "";
  <String, Object>{"k1" : f(1), "k2" : f(2), "k3" : f(3)};
  Expect.equals("123", evalOrder);
}