Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 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 | // The test verifies that parameters of the outer function are correctly |
| 29 | // accessible from the inner closure. |
| 30 | |
| 31 | function runner(f, expected) { |
| 32 | for (var i = 0; i < 10000; i++) { // Loop to trigger optimization. |
| 33 | assertEquals(expected, f.call(this, 10)); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | Function.prototype.bind = function(thisObject) |
| 38 | { |
| 39 | var func = this; |
| 40 | var args = Array.prototype.slice.call(arguments, 1); |
| 41 | function bound() |
| 42 | { |
| 43 | // Note outer function parameter access (|thisObject|). |
| 44 | return func.apply( |
| 45 | thisObject, |
| 46 | args.concat(Array.prototype.slice.call(arguments, 0))); |
| 47 | } |
| 48 | return bound; |
| 49 | } |
| 50 | |
| 51 | function sum(x, y) { |
| 52 | return x + y; |
| 53 | } |
| 54 | |
| 55 | function test(n) { |
| 56 | runner(sum.bind(this, n), n + 10); |
| 57 | } |
| 58 | |
| 59 | test(1); |
| 60 | test(42); |
| 61 | test(239); |