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// Flags: --allow-natives-syntax --legacy-const 29 30// Make sure that we can introduce global variables (using 31// both var and const) that shadow even READ_ONLY variables 32// in the prototype chain. 33const NONE = 0; 34const READ_ONLY = 1; 35 36// Use DeclareGlobal... 37%AddNamedProperty(this.__proto__, "a", 1234, NONE); 38assertEquals(1234, a); 39eval("var a = 5678;"); 40assertEquals(5678, a); 41 42%AddNamedProperty(this.__proto__, "b", 1234, NONE); 43assertEquals(1234, b); 44eval("const b = 5678;"); 45assertEquals(5678, b); 46 47%AddNamedProperty(this.__proto__, "c", 1234, READ_ONLY); 48assertEquals(1234, c); 49eval("var c = 5678;"); 50assertEquals(5678, c); 51 52%AddNamedProperty(this.__proto__, "d", 1234, READ_ONLY); 53assertEquals(1234, d); 54eval("const d = 5678;"); 55assertEquals(5678, d); 56 57// Use DeclareContextSlot... 58%AddNamedProperty(this.__proto__, "x", 1234, NONE); 59assertEquals(1234, x); 60eval("with({}) { var x = 5678; }"); 61assertEquals(5678, x); 62 63%AddNamedProperty(this.__proto__, "y", 1234, NONE); 64assertEquals(1234, y); 65eval("with({}) { const y = 5678; }"); 66assertEquals(5678, y); 67 68%AddNamedProperty(this.__proto__, "z", 1234, READ_ONLY); 69assertEquals(1234, z); 70eval("with({}) { var z = 5678; }"); 71assertEquals(5678, z); 72 73%AddNamedProperty(this.__proto__, "w", 1234, READ_ONLY); 74assertEquals(1234, w); 75eval("with({}) { const w = 5678; }"); 76assertEquals(5678, w); 77