Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Tests of unary delete in cases where it is always true or always false. |
| 29 | |
| 30 | // In an effect context, expression is always true. |
| 31 | assertEquals(undefined, void (delete 0)); |
| 32 | // In an effect context, expression is always false. |
| 33 | assertEquals(undefined, (function (x) { delete x; })(0)); |
| 34 | |
| 35 | // In a pure test context, expression is always true. |
| 36 | assertEquals(1, (delete 0) ? 1 : 2); |
| 37 | // In a pure test context, expression is always false. |
| 38 | assertEquals(2, (function (x) { return (delete x) ? 1 : 2; })(0)); |
| 39 | // In a negated test context, expression is always false. |
| 40 | assertEquals(1, (function (x) { return !(delete x) ? 1 : 2; })(0)); |
| 41 | |
| 42 | // In a hybrid test/value context, expression is always true, value |
| 43 | // expected in accumulator. |
| 44 | assertEquals(3, 1 + ((delete 0) && 2)); |
| 45 | // In a hybrid test/value context, expression is always false, value |
| 46 | // expected in accumulator. |
| 47 | assertEquals(false, (function (x) { return (delete x) && 2; })(0)); |
| 48 | // In a hybrid test/value context, expression is always true, value |
| 49 | // expected on stack. |
| 50 | assertEquals(3, ((delete 0) && 2) + 1); |
| 51 | // In a hybrid test/value context, expression is always false, value |
| 52 | // expected on stack. |
| 53 | assertEquals(1, (function (x) { return ((delete x) && 2) + 1; })(0)); |
| 54 | |
| 55 | // In a hybrid value/test context, expression is always true, value |
| 56 | // expected in accumulator. |
| 57 | assertEquals(2, 1 + ((delete 0) || 2)); |
| 58 | // In a hybrid value/test context, expression is always false, value |
| 59 | // expected in accumulator. |
| 60 | assertEquals(2, (function (x) { return (delete x) || 2; })(0)); |
| 61 | // In a hybrid value/test context, expression is always true, value |
| 62 | // expected on stack. |
| 63 | assertEquals(2, ((delete 0) || 2) + 1); |
| 64 | // In a hybrid value/test context, expression is always false, value |
| 65 | // expected on stack. |
| 66 | assertEquals(3, (function (x) { return ((delete x) || 2) + 1; })(0)); |
| 67 | |
| 68 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 69 | // 'this' is not a Reference so delete returns true (see section 11.4.1, |
| 70 | // step 2 of ES 5.1). |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 71 | assertEquals(true, delete this); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 72 | assertEquals(true, (function () { return delete this; })()); |