d2fe3e68ea
"Own" symbols are symbols that can only denote own properties of objects. R=hpayer@chromium.org, verwaest@chromium.org Committed: https://code.google.com/p/v8/source/detail?r=23056 Review URL: https://codereview.chromium.org/464473002 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
56 lines
1.0 KiB
JavaScript
56 lines
1.0 KiB
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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//
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// Flags: --allow-natives-syntax
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var s = %CreatePrivateOwnSymbol("s");
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var s1 = %CreatePrivateOwnSymbol("s1");
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function TestSimple() {
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var p = {}
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p[s] = "moo";
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var o = Object.create(p);
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assertEquals(undefined, o[s]);
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assertEquals("moo", p[s]);
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o[s] = "bow-wow";
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assertEquals("bow-wow", o[s]);
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assertEquals("moo", p[s]);
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}
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TestSimple();
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function TestICs() {
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var p = {}
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p[s] = "moo";
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var o = Object.create(p);
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o[s1] = "bow-wow";
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function checkNonOwn(o) {
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assertEquals(undefined, o[s]);
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assertEquals("bow-wow", o[s1]);
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}
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checkNonOwn(o);
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// Test monomorphic/optimized.
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for (var i = 0; i < 1000; i++) {
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checkNonOwn(o);
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}
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// Test non-monomorphic.
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for (var i = 0; i < 1000; i++) {
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var oNew = Object.create(p);
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oNew["s" + i] = i;
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oNew[s1] = "bow-wow";
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checkNonOwn(oNew);
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}
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}
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TestICs();
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