1 /* 2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) 3 * Copyright (C) 2001 Peter Kelly (pmk@post.com) 4 * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef Parser_h 24 #define Parser_h 25 26 #include "Debugger.h" 27 #include "ExceptionHelpers.h" 28 #include "Executable.h" 29 #include "JSGlobalObject.h" 30 #include "Lexer.h" 31 #include "Nodes.h" 32 #include "ParserArena.h" 33 #include "SourceProvider.h" 34 #include <wtf/Forward.h> 35 #include <wtf/Noncopyable.h> 36 #include <wtf/OwnPtr.h> 37 #include <wtf/RefPtr.h> 38 39 namespace JSC { 40 41 class FunctionBodyNode; 42 43 class ProgramNode; 44 class UString; 45 46 template <typename T> struct ParserArenaData : ParserArenaDeletable { T data; }; 47 48 class Parser { 49 WTF_MAKE_NONCOPYABLE(Parser); WTF_MAKE_FAST_ALLOCATED; 50 public: Parser()51 Parser() { } 52 template <class ParsedNode> 53 PassRefPtr<ParsedNode> parse(JSGlobalObject* lexicalGlobalObject, Debugger*, ExecState*, const SourceCode& source, FunctionParameters*, JSParserStrictness strictness, JSObject** exception); 54 55 void didFinishParsing(SourceElements*, ParserArenaData<DeclarationStacks::VarStack>*, 56 ParserArenaData<DeclarationStacks::FunctionStack>*, CodeFeatures features, 57 int lastLine, int numConstants, IdentifierSet&); 58 arena()59 ParserArena& arena() { return m_arena; } 60 61 private: 62 void parse(JSGlobalData*, FunctionParameters*, JSParserStrictness strictness, JSParserMode mode, int* errLine, UString* errMsg); 63 64 // Used to determine type of error to report. isFunctionBodyNode(ScopeNode *)65 bool isFunctionBodyNode(ScopeNode*) { return false; } isFunctionBodyNode(FunctionBodyNode *)66 bool isFunctionBodyNode(FunctionBodyNode*) { return true; } 67 68 ParserArena m_arena; 69 const SourceCode* m_source; 70 SourceElements* m_sourceElements; 71 ParserArenaData<DeclarationStacks::VarStack>* m_varDeclarations; 72 ParserArenaData<DeclarationStacks::FunctionStack>* m_funcDeclarations; 73 IdentifierSet m_capturedVariables; 74 CodeFeatures m_features; 75 int m_lastLine; 76 int m_numConstants; 77 }; 78 79 template <class ParsedNode> parse(JSGlobalObject * lexicalGlobalObject,Debugger * debugger,ExecState * debuggerExecState,const SourceCode & source,FunctionParameters * parameters,JSParserStrictness strictness,JSObject ** exception)80 PassRefPtr<ParsedNode> Parser::parse(JSGlobalObject* lexicalGlobalObject, Debugger* debugger, ExecState* debuggerExecState, const SourceCode& source, FunctionParameters* parameters, JSParserStrictness strictness, JSObject** exception) 81 { 82 ASSERT(lexicalGlobalObject); 83 ASSERT(exception && !*exception); 84 int errLine; 85 UString errMsg; 86 87 m_source = &source; 88 if (ParsedNode::scopeIsFunction) 89 lexicalGlobalObject->globalData().lexer->setIsReparsing(); 90 parse(&lexicalGlobalObject->globalData(), parameters, strictness, ParsedNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, &errLine, &errMsg); 91 92 RefPtr<ParsedNode> result; 93 if (m_sourceElements) { 94 result = ParsedNode::create(&lexicalGlobalObject->globalData(), 95 m_sourceElements, 96 m_varDeclarations ? &m_varDeclarations->data : 0, 97 m_funcDeclarations ? &m_funcDeclarations->data : 0, 98 m_capturedVariables, 99 source, 100 m_features, 101 m_numConstants); 102 result->setLoc(m_source->firstLine(), m_lastLine); 103 } else if (lexicalGlobalObject) { 104 // We can never see a syntax error when reparsing a function, since we should have 105 // reported the error when parsing the containing program or eval code. So if we're 106 // parsing a function body node, we assume that what actually happened here is that 107 // we ran out of stack while parsing. If we see an error while parsing eval or program 108 // code we assume that it was a syntax error since running out of stack is much less 109 // likely, and we are currently unable to distinguish between the two cases. 110 if (isFunctionBodyNode(static_cast<ParsedNode*>(0))) 111 *exception = createStackOverflowError(lexicalGlobalObject); 112 else 113 *exception = addErrorInfo(&lexicalGlobalObject->globalData(), createSyntaxError(lexicalGlobalObject, errMsg), errLine, source); 114 } 115 116 m_arena.reset(); 117 118 m_source = 0; 119 m_sourceElements = 0; 120 m_varDeclarations = 0; 121 m_funcDeclarations = 0; 122 123 if (debugger && !ParsedNode::scopeIsFunction) 124 debugger->sourceParsed(debuggerExecState, source.provider(), errLine, errMsg); 125 return result.release(); 126 } 127 128 } // namespace JSC 129 130 #endif // Parser_h 131