45e2628df7
The ES2015 specification for switch statements 13.12.11 specifies that they get their own lexical scope. This patch introduces such a scope through a complex desugaring in terms of blocks, done so that Crankshaft does not have to be updated to support multiple constructs providing scopes. Recommitting this patch after a bug fix in Crankshaft to allow a desugaring with certain elements missing a source location: https://codereview.chromium.org/1313443002 BUG=v8:4377 LOG=Y R=adamk Review URL: https://codereview.chromium.org/1309163003 Cr-Commit-Position: refs/heads/master@{#30340}
46 lines
812 B
JavaScript
46 lines
812 B
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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// See: http://code.google.com/p/v8/issues/detail?id=4377
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// Switch statements should introduce their own lexical scope
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'use strict';
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switch (1) { case 1: let x = 2; }
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assertThrows(function() { return x; }, ReferenceError);
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{
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let result;
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let x = 1;
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switch (x) {
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case 1:
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let x = 2;
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result = x;
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break;
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default:
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result = 0;
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break;
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}
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assertEquals(1, x);
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assertEquals(2, result);
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}
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{
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let result;
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let x = 1;
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switch (eval('x')) {
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case 1:
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let x = 2;
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result = x;
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break;
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default:
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result = 0;
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break;
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}
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assertEquals(1, x);
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assertEquals(2, result);
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}
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