JezK
Edit File: variables.js
// Copyright 2010 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. // Simple tests of the various kinds of variable references in the // implementstion. // Global variables. var x = 0; function f0() { return x; } assertEquals(0, f0()); // Parameters. function f1(x) { return x; } assertEquals(1, f1(1)); // Stack-allocated locals. function f2() { var x = 2; return x; } assertEquals(2, f2()); // Context-allocated locals. Local function forces x into f3's context. function f3(x) { function g() { return x; } return x; } assertEquals(3, f3(3)); // Local function reads x from an outer context. function f4(x) { function g() { return x; } return g(); } assertEquals(4, f4(4)); // Lookup slots. 'With' forces x to be looked up at runtime. function f5(x) { with ({}) return x; } assertEquals(5, f5(5)); // Parameters rewritten to property accesses. Using the name 'arguments' // (even if it shadows the arguments object) forces all parameters to be // rewritten to explicit property accesses. function f6(arguments) { return arguments; } assertEquals(6, f6(6));