1 // Copyright 2008 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 function argc0() { 29 return arguments.length; 30 } 31 32 function argc1(i) { 33 return arguments.length; 34 } 35 36 function argc2(i, j) { 37 return arguments.length; 38 } 39 40 assertEquals(0, argc0()); 41 assertEquals(1, argc0(1)); 42 assertEquals(2, argc0(1, 2)); 43 assertEquals(3, argc0(1, 2, 3)); 44 assertEquals(0, argc1()); 45 assertEquals(1, argc1(1)); 46 assertEquals(2, argc1(1, 2)); 47 assertEquals(3, argc1(1, 2, 3)); 48 assertEquals(0, argc2()); 49 assertEquals(1, argc2(1)); 50 assertEquals(2, argc2(1, 2)); 51 assertEquals(3, argc2(1, 2, 3)); 52 53 54 55 var index; 56 57 function argv0() { 58 return arguments[index]; 59 } 60 61 function argv1(i) { 62 return arguments[index]; 63 } 64 65 function argv2(i, j) { 66 return arguments[index]; 67 } 68 69 index = 0; 70 assertEquals(7, argv0(7)); 71 assertEquals(7, argv0(7, 8)); 72 assertEquals(7, argv0(7, 8, 9)); 73 assertEquals(7, argv1(7)); 74 assertEquals(7, argv1(7, 8)); 75 assertEquals(7, argv1(7, 8, 9)); 76 assertEquals(7, argv2(7)); 77 assertEquals(7, argv2(7, 8)); 78 assertEquals(7, argv2(7, 8, 9)); 79 80 index = 1; 81 assertEquals(8, argv0(7, 8)); 82 assertEquals(8, argv0(7, 8)); 83 assertEquals(8, argv1(7, 8, 9)); 84 assertEquals(8, argv1(7, 8, 9)); 85 assertEquals(8, argv2(7, 8, 9)); 86 assertEquals(8, argv2(7, 8, 9)); 87 88 index = 2; 89 assertEquals(9, argv0(7, 8, 9)); 90 assertEquals(9, argv1(7, 8, 9)); 91 assertEquals(9, argv2(7, 8, 9)); 92 93 94 // Test that calling a lazily compiled function with 95 // an unexpected number of arguments works. 96 function f(a) { return arguments.length; }; 97 assertEquals(3, f(1, 2, 3)); 98