1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2008 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Test const properties and pre/postfix operation. 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction f() { 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const x = 1; 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block x++; 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x); 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block x--; 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x); 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ++x; 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x); 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block --x; 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x); 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x++); 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, x--); 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(2, ++x); 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(0, --x); 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockf(); 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Test that the value is read eventhough assignment is disallowed. 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Spidermonkey does not do this, but it seems like the right thing to 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// do so that 'o++' is equivalent to 'o = o + 1'. 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvar valueOfCount = 0; 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction g() { 53257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch const o = { valueOf: function() { valueOfCount++; return 42; } }; 54257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch assertEquals(42, +o); 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(1, valueOfCount); 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block o++; 57257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch assertEquals(42, +o); 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(3, valueOfCount); 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ++o; 60257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch assertEquals(42, +o); 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(5, valueOfCount); 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block o--; 63257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch assertEquals(42, +o); 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(7, valueOfCount); 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block --o; 66257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch assertEquals(42, +o); 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(9, valueOfCount); 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 69a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 70a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockg(); 71