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 // 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. // Dart test program for testing for statement which captures loop variable. import "package:expect/expect.dart"; var f; main() { // Capture the loop variable, ensure we capture the right value. for (int i = 0; i < 10; i++) { if (i == 7) { f = () => "i = \$i"; } } Expect.equals("i = 7", f()); // There is only one instance of k. The captured variable continues // to change. int k; for (k = 0; k < 10; k++) { if (k == 7) { f = () => "k = \$k"; } } Expect.equals("k = 10", f()); // l gets modified after it's captured. n++ is executed on the // newly introduced instance of n (i.e. the instance of the loop // iteration after the value is captured). for (int n = 0; n < 10; n++) { var l = n; if (l == 7) { f = () => "l = \$l, n = \$n"; } l++; } Expect.equals("l = 8, n = 7", f()); // Loop variable is incremented in loop body instead of the increment. // expression. Thus, the captured value is incremented by one before // a new loop variable instance is created. for (int i = 0; i < 10; /*nothing*/) { if (i == 7) { f = () => "i = \$i"; } i++; } Expect.equals("i = 8", f()); // Make sure continue still ensures the loop variable is captured correctly. for (int i = 0; i < 10; i++) { if (i == 7) { f = () => "i = \$i"; } continue; i++; } Expect.equals("i = 7", f()); // Nested loops with captured variables. for (int k = 0; k < 5; k++) { for (int i = 0; i < 10; i++) { if (k == 3 && i == 7) { f = () => "k = \$k, i = \$i"; } } } Expect.equals("k = 3, i = 7", f()); }