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}
43 lines
918 B
JavaScript
43 lines
918 B
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --legacy-const
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(function f(){
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assertEquals("function", typeof f);
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})();
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(function f(){
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var f; // Variable shadows function name.
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assertEquals("undefined", typeof f);
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})();
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(function f(){
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var f;
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assertEquals("undefined", typeof f);
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with ({}); // Force context allocation of both variable and function name.
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})();
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assertEquals("undefined", typeof f);
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// var initialization is intercepted by with scope.
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(function() {
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var o = { a: 1 };
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with (o) {
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var a = 2;
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}
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assertEquals("undefined", typeof a);
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assertEquals(2, o.a);
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})();
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// const initialization is not intercepted by with scope.
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(function() {
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var o = { a: 1 };
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with (o) {
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const a = 2;
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}
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assertEquals(2, a);
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assertEquals(1, o.a);
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})();
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