cb1bf4af3c
Implements iterator finalisation by desugaring for-of loops with an additional try-finally wrapper. See comment in parser.cc for details. Also improved some AST printing facilities while there. @Ross, I had to disable the bytecode generation test for for-of, because it got completely out of hand after this change (the new bytecode has 150+ lines). See the TODO that I assigned to you. Patch set 1 is WIP patch by Georg (http://crrev.com/1695583003), patch set 2 relative changes. @Georg, FYI, I changed the following: - Moved try-finally out of the loop body, for performance, and in order to be able to handle `continue` correctly. - Fixed scope management in ParseForStatement, which was the cause for the variable allocation failure. - Fixed pre-existing zone initialisation bug in rewriter, which caused the crashes. - Enabled all tests, adjusted a few others, added a couple more. BUG=v8:2214 LOG=Y Review URL: https://codereview.chromium.org/1695393003 Cr-Commit-Position: refs/heads/master@{#34111}
12 lines
429 B
JavaScript
12 lines
429 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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// Flags: --strong-mode
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(function NoForInStatement() {
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assertThrows("'use strong'; for (x in []) {}", SyntaxError);
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assertThrows("'use strong'; for (let x in []) {}", SyntaxError);
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assertThrows("'use strong'; for (const x in []) {}", SyntaxError);
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})();
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