JezK
Edit File: arguments-opt.js
// Copyright 2008 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --allow-natives-syntax function L0() { return %_ArgumentsLength(); } function L1(a) { return %_ArgumentsLength(); } function L5(a,b,c,d,e) { return %_ArgumentsLength(); } assertEquals(0, L0()); assertEquals(1, L0(1)); assertEquals(2, L0(1,2)); assertEquals(5, L0(1,2,3,4,5)); assertEquals(0, L1()); assertEquals(1, L1(1)); assertEquals(2, L1(1,2)); assertEquals(5, L1(1,2,3,4,5)); assertEquals(0, L5()); assertEquals(1, L5(1)); assertEquals(2, L5(1,2)); assertEquals(5, L5(1,2,3,4,5)); function A(key) { return %_Arguments(key); } // Integer access. assertEquals(0, A(0)); assertEquals(0, A(0,1)); assertEquals(2, A(1,2)); assertEquals(2, A(1,2,3,4,5)); assertEquals(5, A(4,2,3,4,5)); assertTrue(typeof A(1) == 'undefined'); assertTrue(typeof A(3,2,1) == 'undefined'); // Out-of-bounds integer access with and without argument // adaptor frames. assertTrue(typeof(A(-10000)) == 'undefined'); assertTrue(typeof(A(-10000, 0)) == 'undefined'); assertTrue(typeof(A(-1)) == 'undefined'); assertTrue(typeof(A(-1, 0)) == 'undefined'); assertTrue(typeof(A(10000)) == 'undefined'); assertTrue(typeof(A(10000, 0)) == 'undefined'); // String access. assertEquals('0', A('0')); assertEquals('0', A('0',1)); assertEquals(2, A('1',2)); assertEquals(2, A('1',2,3,4,5)); assertEquals(5, A('4',2,3,4,5)); assertEquals('undefined', typeof A('1')); assertEquals('undefined', typeof A('3',2,1)); assertEquals(A, A('callee')); assertEquals(1, A('length')); assertEquals(2, A('length',2)); assertEquals(5, A('length',2,3,4,5)); assertEquals({}.toString, A('toString')); assertEquals({}.isPrototypeOf, A('isPrototypeOf')); assertEquals('undefined', typeof A('xxx')); // Object access. function O(key) { return { toString: function() { return key; } }; } var O0 = O(0); assertSame(O0, A(O0)); assertSame(O0, A(O0,1)); assertEquals(2, A(O(1),2)); assertEquals(2, A(O(1),2,3,4,5)); assertEquals(5, A(O(4),2,3,4,5)); assertTrue(typeof A(O(1)) == 'undefined'); assertTrue(typeof A(O(3),2,1) == 'undefined'); O0 = O('0'); assertSame(O0, A(O0)); assertSame(O0, A(O0,1)); assertEquals(2, A(O('1'),2)); assertEquals(2, A(O('1'),2,3,4,5)); assertEquals(5, A(O('4'),2,3,4,5)); assertTrue(typeof A(O('1')) == 'undefined'); assertTrue(typeof A(O('3'),2,1) == 'undefined'); assertEquals(A, A(O('callee'))); assertEquals(1, A(O('length'))); assertEquals(2, A(O('length'),2)); assertEquals(5, A(O('length'),2,3,4,5)); assertEquals({}.toString, A(O('toString'))); assertEquals({}.isPrototypeOf, A(O('isPrototypeOf'))); assertTrue(typeof A(O('xxx')) == 'undefined'); // Make sure that out-of-bounds access do lookups in the // prototype chain. Object.prototype[5] = 42; assertEquals(42, A(5)); Object.prototype[-5] = 87; assertEquals(87, A(-5));