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