1e9a7267ab
This CL introduces a third mode next to the non-strict (henceforth called 'classic mode') and 'strict mode' which is called 'extended mode' as in the current ES.next specification drafts. The extended mode is based on the 'strict mode' and adds new functionality to it. This means that most of the semantics of these two modes coincide. The 'extended mode' is entered instead of the 'strict mode' during parsing when using the 'strict mode' directive "use strict" and when the the harmony-scoping flag is active. This should be changed once it is fully specified how the 'extended mode' is entered. This change introduces a new 3 valued enum LanguageMode (see globals.h) corresponding to the modes which is mostly used by the frontend code. This includes the following components: * (Pre)Parser * Compiler * SharedFunctionInfo, Scope and ScopeInfo * runtime functions: StoreContextSlot, ResolvePossiblyDirectEval, InitializeVarGlobal, DeclareGlobals The old enum StrictModeFlag is still used in the backend when the distinction between the 'strict mode' and the 'extended mode' does not matter. This includes: * SetProperty runtime function, Delete builtin * StoreIC and KeyedStoreIC * StubCache Review URL: http://codereview.chromium.org/8417035 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10062 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
67 lines
2.2 KiB
JavaScript
67 lines
2.2 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --harmony-scoping --allow-natives-syntax
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// TODO(ES6): properly activate extended mode
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"use strict";
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// Test that temporal dead zone semantics for function and block scoped
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// ket bindings are handled by the optimizing compiler.
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function f(x, b) {
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let y = (b ? y : x) + 42;
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return y;
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}
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function g(x, b) {
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{
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let y = (b ? y : x) + 42;
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return y;
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}
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}
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for (var i=0; i<10; i++) {
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f(i, false);
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g(i, false);
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}
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%OptimizeFunctionOnNextCall(f);
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%OptimizeFunctionOnNextCall(g);
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try {
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f(42, true);
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} catch (e) {
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assertInstanceof(e, ReferenceError);
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}
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try {
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g(42, true);
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} catch (e) {
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assertInstanceof(e, ReferenceError);
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}
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