1/* 2 * Copyright (C) 2012, 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 27#ifndef ParserModes_h 28#define ParserModes_h 29 30#include "Identifier.h" 31 32namespace JSC { 33 34enum JSParserStrictness { JSParseNormal, JSParseBuiltin, JSParseStrict }; 35enum JSParserMode { JSParseProgramCode, JSParseFunctionCode }; 36 37enum ProfilerMode { ProfilerOff, ProfilerOn }; 38enum DebuggerMode { DebuggerOff, DebuggerOn }; 39 40enum FunctionMode { FunctionExpression, FunctionDeclaration }; 41 42inline bool functionNameIsInScope(const Identifier& name, FunctionMode functionMode) 43{ 44 if (name.isNull()) 45 return false; 46 47 if (functionMode != FunctionExpression) 48 return false; 49 50 return true; 51} 52 53inline bool functionNameScopeIsDynamic(bool usesEval, bool isStrictMode) 54{ 55 // If non-strict eval is in play, a function gets a separate object in the scope chain for its name. 56 // This enables eval to declare and then delete a name that shadows the function's name. 57 58 if (!usesEval) 59 return false; 60 61 if (isStrictMode) 62 return false; 63 64 return true; 65} 66 67typedef unsigned CodeFeatures; 68 69const CodeFeatures NoFeatures = 0; 70const CodeFeatures EvalFeature = 1 << 0; 71const CodeFeatures ArgumentsFeature = 1 << 1; 72const CodeFeatures WithFeature = 1 << 2; 73const CodeFeatures CatchFeature = 1 << 3; 74const CodeFeatures ThisFeature = 1 << 4; 75const CodeFeatures StrictModeFeature = 1 << 5; 76const CodeFeatures ShadowsArgumentsFeature = 1 << 6; 77const CodeFeatures ModifiedParameterFeature = 1 << 7; 78 79const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | CatchFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ModifiedParameterFeature; 80 81} // namespace JSC 82 83#endif // ParserModes_h 84