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93 lines
2.0 KiB
93 lines
2.0 KiB
#ifndef INC_ParserSharedInputState_h__
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#define INC_ParserSharedInputState_h__
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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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#include <antlr/config.h>
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#include <antlr/TokenBuffer.h>
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#include <antlr/RefCount.h>
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#include <string>
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
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namespace antlr {
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#endif
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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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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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TokenBuffer& getInput( void )
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{
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return *input;
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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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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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// 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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/// A reference counted ParserInputState
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typedef RefCount<ParserInputState> ParserSharedInputState;
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
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}
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#endif
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#endif //INC_ParserSharedInputState_h__
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