OSX/libsecurity_codesigning/antlr2/antlr/ParserSharedInputState.hpp

   1 #ifndef INC_ParserSharedInputState_hpp__
   2 #define INC_ParserSharedInputState_hpp__
   3
   4 /* ANTLR Translator Generator
   5  * Project led by Terence Parr at http://www.jGuru.com
   6  * Software rights: http://www.antlr.org/license.html
   7  *
   8  * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/ParserSharedInputState.hpp#2 $
   9  */
  10
  11 #include <antlr/config.hpp>
  12 #include <antlr/TokenBuffer.hpp>
  13 #include <antlr/RefCount.hpp>
  14 #include <string>
  15
  16 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  17 namespace antlr {
  18 #endif
  19
  20 /** This object contains the data associated with an
  21  * input stream of tokens.  Multiple parsers
  22  * share a single ParserSharedInputState to parse
  23  * the same stream of tokens.
  24  */
  25 class ANTLR_API ParserInputState {
  26 public:
  27         /** Construct a new ParserInputState
  28          * @param in the TokenBuffer to read from. The object is deleted together
  29          * with the ParserInputState object.
  30          */
  31         ParserInputState( TokenBuffer* in )
  32         : guessing(0)
  33         , filename()
  34         , input(in)
  35         , inputResponsible(true)
  36         {
  37         }
  38         /** Construct a new ParserInputState
  39          * @param in the TokenBuffer to read from.
  40          */
  41         ParserInputState( TokenBuffer& in )
  42         : guessing(0)
  43         , filename("")
  44         , input(&in)
  45         , inputResponsible(false)
  46         {
  47         }
  48
  49         virtual ~ParserInputState()
  50         {
  51                 if (inputResponsible)
  52                         delete input;
  53         }
  54
  55         TokenBuffer& getInput( void )
  56         {
  57                 return *input;
  58         }
  59
  60         /// Reset the ParserInputState and the underlying TokenBuffer
  61         void reset( void )
  62         {
  63                 input->reset();
  64                 guessing = 0;
  65         }
  66
  67 public:
  68         /** Are we guessing (guessing>0)? */
  69         int guessing;
  70         /** What file (if known) caused the problem?
  71          * @todo wrap this one..
  72          */
  73         ANTLR_USE_NAMESPACE(std)string filename;
  74 private:
  75         /** Where to get token objects */
  76         TokenBuffer* input;
  77         /// Do we need to free the TokenBuffer or is it owned by another..
  78         bool inputResponsible;
  79
  80         // we don't want these:
  81         ParserInputState(const ParserInputState&);
  82         ParserInputState& operator=(const ParserInputState&);
  83 };
  84
  85 /// A reference counted ParserInputState
  86 typedef RefCount<ParserInputState> ParserSharedInputState;
  87
  88 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  89 }
  90 #endif
  91
  92 #endif //INC_ParserSharedInputState_hpp__