77394fa05a
TC39 agreed to disallow "use strict" directives in function body when non-simple parameter lists are used. This is a continuation of caitp's CL https://codereview.chromium.org/1281163002/ with some refactorings removed for now. Still TODO: there is a lot of duplication between the is_simple field of FormalParametersBase and the NonSimpleParameter property ExpressionClassifier keeps track of. It should be possible to remove the former with a minor refactoring of arrow function parsing. This will be attempted in a follow-up CL. BUG= LOG=N Review URL: https://codereview.chromium.org/1300103005 Cr-Commit-Position: refs/heads/master@{#30388}
32 lines
959 B
JavaScript
32 lines
959 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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//
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// Flags: --harmony-destructuring
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// Flags: --harmony-arrow-functions --strong-mode --allow-natives-syntax
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(function() {
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var f = (function() {
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"use strong";
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return function f({ x = function() { return []; } }) { return x(); };
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})();
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var a = f({ x: undefined });
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assertTrue(%IsStrong(a));
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// TODO(rossberg): Loading non-existent properties during destructuring should
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// not throw in strong mode.
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assertThrows(function() { f({}); }, TypeError);
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function weakf({ x = function() { return []; } }) { return x(); }
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a = weakf({});
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assertFalse(%IsStrong(a));
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function outerf() { return []; }
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var f2 = (function() {
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"use strong";
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return function f2({ x = outerf }) { return x(); };
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})();
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a = f2({ x: undefined });
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assertFalse(%IsStrong(a));
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})();
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