OSX/libsecurity_codesigning/antlr2/antlr/CharBuffer.hpp

   1 #ifndef INC_CharBuffer_hpp__
   2 #define INC_CharBuffer_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/CharBuffer.hpp#2 $
   9  */
  10
  11 #include <antlr/config.hpp>
  12
  13 #include <istream>
  14
  15 #include <antlr/InputBuffer.hpp>
  16
  17 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  18 namespace antlr {
  19 #endif
  20
  21 /**A Stream of characters fed to the lexer from a InputStream that can
  22  * be rewound via mark()/rewind() methods.
  23  * <p>
  24  * A dynamic array is used to buffer up all the input characters.  Normally,
  25  * "k" characters are stored in the buffer.  More characters may be stored
  26  * during guess mode (testing syntactic predicate), or when LT(i>k) is
  27  * referenced.
  28  * Consumption of characters is deferred.  In other words, reading the next
  29  * character is not done by consume(), but deferred until needed by LA or LT.
  30  * <p>
  31  *
  32  * @see antlr.CharQueue
  33  */
  34
  35 class ANTLR_API CharBuffer : public InputBuffer {
  36 public:
  37         /// Create a character buffer
  38         CharBuffer( ANTLR_USE_NAMESPACE(std)istream& input );
  39         /// Get the next character from the stream
  40         int getChar();
  41
  42 protected:
  43         // character source
  44         ANTLR_USE_NAMESPACE(std)istream& input;
  45
  46 private:
  47         // NOTE: Unimplemented
  48         CharBuffer(const CharBuffer& other);
  49         CharBuffer& operator=(const CharBuffer& other);
  50 };
  51
  52 #ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
  53 }
  54 #endif
  55
  56 #endif //INC_CharBuffer_hpp__