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}
68 lines
1.5 KiB
JavaScript
68 lines
1.5 KiB
JavaScript
// Copyright 2015 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: --harmony-sloppy --harmony-sloppy-let --harmony-destructuring-bind
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// Flags: --legacy-const
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// let is usable as a variable with var or legacy const, not let or ES6 const
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(function (){
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assertEquals(undefined, let);
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var let;
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let = 5;
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assertEquals(5, let);
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(function() { var let = 1; assertEquals(1, let); })();
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assertEquals(5, let);
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})();
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assertThrows(function() { return let; }, ReferenceError);
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(function() {
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var let, sum = 0;
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for (let in [1, 2, 3, 4]) sum += Number(let);
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assertEquals(6, sum);
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(function() { for (var let of [4, 5]) sum += let; })();
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assertEquals(15, sum);
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(function() { for (var let in [6]) sum += Number([6][let]); })();
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assertEquals(21, sum);
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for (let = 7; let < 8; let++) sum += let;
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assertEquals(28, sum);
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assertEquals(8, let);
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(function() { for (var let = 8; let < 9; let++) sum += let; })();
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assertEquals(36, sum);
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assertEquals(8, let);
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})();
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assertThrows(function() { return let; }, ReferenceError);
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(function () {
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let obj = {};
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var {let} = {let() { return obj; }};
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let().x = 1;
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assertEquals(1, obj.x);
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})();
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(function () {
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let obj = {};
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const [let] = [function() { return obj; }];
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let().x = 1;
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assertEquals(1, obj.x);
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})();
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(function() {
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function let() {
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return 1;
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}
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assertEquals(1, let());
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})()
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assertThrows('for (let of []) {}', SyntaxError);
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