parser/Parser.h

   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 "SourceProvider.h"
  27 #include "Debugger.h"
  28 #include "Nodes.h"
  29 #include <wtf/Forward.h>
  30 #include <wtf/Noncopyable.h>
  31 #include <wtf/OwnPtr.h>
  32 #include <wtf/RefPtr.h>
  33
  34 namespace JSC {
  35
  36     class FunctionBodyNode;
  37     class ProgramNode;
  38     class UString;
  39
  40     template <typename T>
  41     struct ParserRefCountedData : ParserRefCounted {
  42         ParserRefCountedData(JSGlobalData* globalData)
  43             : ParserRefCounted(globalData)
  44         {
  45         }
  46
  47         T data;
  48     };
  49
  50     class Parser : Noncopyable {
  51     public:
  52         template <class ParsedNode> PassRefPtr<ParsedNode> parse(ExecState*, Debugger*, const SourceCode&, int* errLine = 0, UString* errMsg = 0);
  53         template <class ParsedNode> PassRefPtr<ParsedNode> reparse(JSGlobalData*, ParsedNode*);
  54         void reparseInPlace(JSGlobalData*, FunctionBodyNode*);
  55
  56         void didFinishParsing(SourceElements*, ParserRefCountedData<DeclarationStacks::VarStack>*,
  57                               ParserRefCountedData<DeclarationStacks::FunctionStack>*, CodeFeatures features, int lastLine, int numConstants);
  58
  59     private:
  60         void parse(JSGlobalData*, int* errLine, UString* errMsg);
  61
  62         const SourceCode* m_source;
  63         RefPtr<SourceElements> m_sourceElements;
  64         RefPtr<ParserRefCountedData<DeclarationStacks::VarStack> > m_varDeclarations;
  65         RefPtr<ParserRefCountedData<DeclarationStacks::FunctionStack> > m_funcDeclarations;
  66         CodeFeatures m_features;
  67         int m_lastLine;
  68         int m_numConstants;
  69     };
  70
  71     template <class ParsedNode> PassRefPtr<ParsedNode> Parser::parse(ExecState* exec, Debugger* debugger, const SourceCode& source, int* errLine, UString* errMsg)
  72     {
  73         m_source = &source;
  74         parse(&exec->globalData(), errLine, errMsg);
  75         RefPtr<ParsedNode> result;
  76         if (m_sourceElements) {
  77             result = ParsedNode::create(&exec->globalData(),
  78                                          m_sourceElements.get(),
  79                                          m_varDeclarations ? &m_varDeclarations->data : 0,
  80                                          m_funcDeclarations ? &m_funcDeclarations->data : 0,
  81                                          *m_source,
  82                                          m_features,
  83                                          m_numConstants);
  84             result->setLoc(m_source->firstLine(), m_lastLine);
  85         }
  86
  87         m_source = 0;
  88         m_sourceElements = 0;
  89         m_varDeclarations = 0;
  90         m_funcDeclarations = 0;
  91
  92         if (debugger)
  93             debugger->sourceParsed(exec, source, *errLine, *errMsg);
  94         return result.release();
  95     }
  96
  97     template <class ParsedNode> PassRefPtr<ParsedNode> Parser::reparse(JSGlobalData* globalData, ParsedNode* oldParsedNode)
  98     {
  99         m_source = &oldParsedNode->source();
 100         parse(globalData, 0, 0);
 101         RefPtr<ParsedNode> result;
 102         if (m_sourceElements) {
 103             result = ParsedNode::create(globalData,
 104                                         m_sourceElements.get(),
 105                                         m_varDeclarations ? &m_varDeclarations->data : 0,
 106                                         m_funcDeclarations ? &m_funcDeclarations->data : 0,
 107                                         *m_source,
 108                                         oldParsedNode->features(),
 109                                         m_numConstants);
 110             result->setLoc(m_source->firstLine(), m_lastLine);
 111         }
 112
 113         m_source = 0;
 114         m_sourceElements = 0;
 115         m_varDeclarations = 0;
 116         m_funcDeclarations = 0;
 117
 118         return result.release();
 119     }
 120
 121 } // namespace JSC
 122
 123 #endif // Parser_h