Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: test/script/basic/typecoerce.js
test/script/basic/typecoerce.js
- changeset 57
- 59970b70ebb5
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- b1a7da25b547
- child 962
- ac62e33a99b0
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| 56:755404d7d189 | 57:59970b70ebb5 |
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| 1 /* | |
| 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
| 23 | |
| 24 /** | |
| 25 * There was a bug in the old Lower that didn't fully propagate type information | |
| 26 * by way of assignment. 'q' in the example below would have finished a double | |
| 27 * even though it can get an object value through the assignment 'q = l' | |
| 28 * | |
| 29 * Furthermore, this caused type coercion to be done at q = l, and not a q = q * 2, | |
| 30 * which is a bug. This test ensures it happens in the correct order | |
| 31 * | |
| 32 * @test | |
| 33 * @run | |
| 34 */ | |
| 35 | |
| 36 function createObject() { | |
| 37 var obj = { valueOf: function() { print("toNumber coercion"); return 17; }} | |
| 38 return obj; | |
| 39 } | |
| 40 | |
| 41 function f() { | |
| 42 var l = 1.2; //number | |
| 43 var q = 2.3; //number | |
| 44 for (var i = 0; i < 2; i++) { | |
| 45 q = l; // q = toNumber(l), no coercion here | |
| 46 print("assignment done"); | |
| 47 q = q * 2; // q = q * 2, coercion here | |
| 48 print("multiplication done"); | |
| 49 l = createObject(); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 f(); |
