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#ifndef INC_ParserSharedInputState_hpp__ |
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#define INC_ParserSharedInputState_hpp__ |
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|
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/* ANTLR Translator Generator |
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* Project led by Terence Parr at http://www.jGuru.com |
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* Software rights: http://www.antlr.org/license.html |
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* |
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* $Id$ |
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*/ |
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|
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#include <antlr/config.hpp> |
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#include <antlr/TokenBuffer.hpp> |
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#include <antlr/RefCount.hpp> |
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#include <string> |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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namespace antlr { |
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#endif |
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|
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/** This object contains the data associated with an |
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* input stream of tokens. Multiple parsers |
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* share a single ParserSharedInputState to parse |
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* the same stream of tokens. |
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*/ |
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class ANTLR_API ParserInputState { |
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public: |
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/** Construct a new ParserInputState |
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* @param in the TokenBuffer to read from. The object is deleted together |
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* with the ParserInputState object. |
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*/ |
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ParserInputState( TokenBuffer* in ) |
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: guessing(0) |
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, filename() |
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, input(in) |
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, inputResponsible(true) |
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{ |
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} |
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/** Construct a new ParserInputState |
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* @param in the TokenBuffer to read from. |
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*/ |
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ParserInputState( TokenBuffer& in ) |
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: guessing(0) |
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, filename("") |
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, input(&in) |
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, inputResponsible(false) |
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{ |
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} |
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|
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virtual ~ParserInputState() |
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{ |
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if (inputResponsible) |
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delete input; |
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} |
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|
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TokenBuffer& getInput( void ) |
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{ |
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return *input; |
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} |
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|
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/// Reset the ParserInputState and the underlying TokenBuffer |
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void reset( void ) |
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{ |
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input->reset(); |
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guessing = 0; |
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} |
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|
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public: |
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/** Are we guessing (guessing>0)? */ |
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int guessing; |
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/** What file (if known) caused the problem? |
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* @todo wrap this one.. |
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*/ |
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ANTLR_USE_NAMESPACE(std)string filename; |
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private: |
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/** Where to get token objects */ |
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TokenBuffer* input; |
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/// Do we need to free the TokenBuffer or is it owned by another.. |
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bool inputResponsible; |
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|
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// we don't want these: |
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ParserInputState(const ParserInputState&); |
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ParserInputState& operator=(const ParserInputState&); |
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}; |
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|
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/// A reference counted ParserInputState |
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typedef RefCount<ParserInputState> ParserSharedInputState; |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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} |
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#endif |
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|
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#endif //INC_ParserSharedInputState_hpp__ |
