95145fa826
This patch moves the semantics of 'const' in sloppy mode to match those in strict mode, that is, const makes lexical (let-like) bindings, must have an initializer, and does not create properties of the global object. R=adamk LOG=Y BUG=v8:3305 CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel Review URL: https://codereview.chromium.org/1571873004 Cr-Commit-Position: refs/heads/master@{#33218}
74 lines
2.9 KiB
JavaScript
74 lines
2.9 KiB
JavaScript
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --legacy-const
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// Make sure that eval can introduce a local variable called __proto__.
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// See http://code.google.com/p/v8/issues/detail?id=186
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var setterCalled = false;
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var o = {};
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o.__defineSetter__("x", function() { setterCalled = true; });
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function runTest(test) {
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setterCalled = false;
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test();
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}
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function testLocal() {
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// Add property called __proto__ to the extension object.
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eval("var __proto__ = o");
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// Check that the extension object's prototype did not change.
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eval("var x = 27");
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assertFalse(setterCalled, "prototype of extension object changed");
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assertEquals(o, eval("__proto__"));
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}
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function testConstLocal() {
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// Add const property called __proto__ to the extension object.
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eval("const __proto__ = o");
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// Check that the extension object's prototype did not change.
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eval("var x = 27");
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assertFalse(setterCalled, "prototype of extension object changed");
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assertEquals(o, eval("__proto__"));
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}
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function testGlobal() {
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// Assign to the global __proto__ property.
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eval("__proto__ = o");
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// Check that the prototype of the global object changed.
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eval("x = 27");
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assertTrue(setterCalled, "prototype of global object did not change");
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setterCalled = false;
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assertEquals(o, eval("__proto__"));
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}
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runTest(testLocal);
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runTest(testConstLocal);
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runTest(testGlobal);
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