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 "Executable.h"
28 #include "JSGlobalObject.h"
29 #include "Lexer.h"
30 #include "Nodes.h"
31 #include "ParserArena.h"
32 #include "SourceProvider.h"
33 #include <wtf/Forward.h>
34 #include <wtf/Noncopyable.h>
35 #include <wtf/OwnPtr.h>
36 #include <wtf/RefPtr.h>
37 
38 namespace JSC {
39 
40     class FunctionBodyNode;
41     class ProgramNode;
42     class UString;
43 
44     template <typename T> struct ParserArenaData : ParserArenaDeletable { T data; };
45 
46     class Parser : public Noncopyable {
47     public:
48         template <class ParsedNode>
49         PassRefPtr<ParsedNode> parse(JSGlobalData* globalData, Debugger*, ExecState*, const SourceCode& source, int* errLine = 0, UString* errMsg = 0);
50 
51         void didFinishParsing(SourceElements*, ParserArenaData<DeclarationStacks::VarStack>*,
52                               ParserArenaData<DeclarationStacks::FunctionStack>*, CodeFeatures features, int lastLine, int numConstants);
53 
arena()54         ParserArena& arena() { return m_arena; }
55 
56     private:
57         void parse(JSGlobalData*, int* errLine, UString* errMsg);
58 
59         ParserArena m_arena;
60         const SourceCode* m_source;
61         SourceElements* m_sourceElements;
62         ParserArenaData<DeclarationStacks::VarStack>* m_varDeclarations;
63         ParserArenaData<DeclarationStacks::FunctionStack>* m_funcDeclarations;
64         CodeFeatures m_features;
65         int m_lastLine;
66         int m_numConstants;
67     };
68 
69     template <class ParsedNode>
parse(JSGlobalData * globalData,Debugger * debugger,ExecState * debuggerExecState,const SourceCode & source,int * errLine,UString * errMsg)70     PassRefPtr<ParsedNode> Parser::parse(JSGlobalData* globalData, Debugger* debugger, ExecState* debuggerExecState, const SourceCode& source, int* errLine, UString* errMsg)
71     {
72         m_source = &source;
73         if (ParsedNode::scopeIsFunction)
74             globalData->lexer->setIsReparsing();
75         parse(globalData, errLine, errMsg);
76 
77         RefPtr<ParsedNode> result;
78         if (m_sourceElements) {
79             result = ParsedNode::create(globalData,
80             m_sourceElements,
81             m_varDeclarations ? &m_varDeclarations->data : 0,
82             m_funcDeclarations ? &m_funcDeclarations->data : 0,
83             source,
84             m_features,
85             m_numConstants);
86             result->setLoc(m_source->firstLine(), m_lastLine);
87         }
88 
89         m_arena.reset();
90 
91         m_source = 0;
92         m_sourceElements = 0;
93         m_varDeclarations = 0;
94         m_funcDeclarations = 0;
95 
96         if (debugger && !ParsedNode::scopeIsFunction)
97             debugger->sourceParsed(debuggerExecState, source, *errLine, *errMsg);
98         return result.release();
99     }
100 
101 } // namespace JSC
102 
103 #endif // Parser_h
104