CharBuffer.hpp

#ifndef INC_CharBuffer_hpp__
#define INC_CharBuffer_hpp__
 
/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id$
 */
 
#include <antlr/config.hpp>
 
#include <istream>
 
#include <antlr/InputBuffer.hpp>
 
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif
 
/**A Stream of characters fed to the lexer from a InputStream that can
 * be rewound via mark()/rewind() methods.
 * <p>
 * A dynamic array is used to buffer up all the input characters.  Normally,
 * "k" characters are stored in the buffer.  More characters may be stored
 * during guess mode (testing syntactic predicate), or when LT(i>k) is
 * referenced.
 * Consumption of characters is deferred.  In other words, reading the next
 * character is not done by consume(), but deferred until needed by LA or LT.
 * <p>
 *
 * @see antlr.CharQueue
 */
 
class ANTLR_API CharBuffer : public InputBuffer {
public:
        /// Create a character buffer
        CharBuffer( ANTLR_USE_NAMESPACE(std)istream& input );
        /// Get the next character from the stream
        int getChar();
 
protected:
 
private:
        // character source
        ANTLR_USE_NAMESPACE(std)istream& input;
 
        // NOTE: Unimplemented
        CharBuffer(const CharBuffer& other);
        CharBuffer& operator=(const CharBuffer& other);
};
 
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif
 
#endif //INC_CharBuffer_hpp__