text: /*=============================================================================
      Boost.Wave: A Standard compliant C++ preprocessor library
  
      Definition of the abstract lexer interface
      
      http://www.boost.org/
  
      Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
      Software License, Version 1.0. (See accompanying file
      LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  =============================================================================*/
  
  #if !defined(BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED)
  #define BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED
  
  #include <boost/wave/wave_config.hpp>
  #include <boost/wave/util/file_position.hpp>
  #include <boost/wave/language_support.hpp>
  #include <boost/wave/cpplexer/cpp_lex_interface.hpp>
  #include <boost/wave/cpplexer/cpp_lex_token.hpp>      // lex_token 
  
  // this must occur after all of the includes and before any code appears
  #ifdef BOOST_HAS_ABI_HEADERS
  #include BOOST_ABI_PREFIX
  #endif
  
  // suppress warnings about dependent classes not being exported from the dll
  #ifdef BOOST_MSVC
  #pragma warning(push)
  #pragma warning(disable : 4251 4231 4660)
  #endif
  
  ///////////////////////////////////////////////////////////////////////////////
  namespace boost {
  namespace wave {
  namespace cpplexer {
  
  #if BOOST_WAVE_SEPARATE_LEXER_INSTANTIATION != 0
  #define BOOST_WAVE_NEW_LEXER_DECL BOOST_WAVE_DECL
  #else
  #define BOOST_WAVE_NEW_LEXER_DECL
  #endif 
  
  ///////////////////////////////////////////////////////////////////////////////
  //  
  //  new_lexer_gen: generates a new instance of the required C++ lexer
  //
  ///////////////////////////////////////////////////////////////////////////////
  template <
      typename IteratorT, 
      typename PositionT = boost::wave::util::file_position_type,
      typename TokenT = lex_token<PositionT> 
  >
  struct BOOST_WAVE_NEW_LEXER_DECL new_lexer_gen
  {
  //  The NewLexer function allows the opaque generation of a new lexer object.
  //  It is coupled to the token type to allow to decouple the lexer/token 
  //  configurations at compile time.
      static lex_input_interface<TokenT> *
      new_lexer(IteratorT const &first, IteratorT const &last, 
          PositionT const &pos, boost::wave::language_support language);
  };
  
  #undef BOOST_WAVE_NEW_LEXER_DECL
  
  ///////////////////////////////////////////////////////////////////////////////
  //
  //  The lex_input_interface_generator helps to instantiate a concrete lexer
  //  to be used by the Wave preprocessor module.
  //  This is done to allow compile time reduction.
  //
  ///////////////////////////////////////////////////////////////////////////////
  
  template <typename TokenT>
  struct lex_input_interface_generator
  :   lex_input_interface<TokenT>
  {
      typedef typename lex_input_interface<TokenT>::position_type position_type;
  
      lex_input_interface_generator() {}
      ~lex_input_interface_generator() {}
  
  //  The new_lexer function allows the opaque generation of a new lexer object.
  //  It is coupled to the token type to allow to distinguish different 
  //  lexer/token configurations at compile time.
      template <typename IteratorT>
      static lex_input_interface<TokenT> *
      new_lexer(IteratorT const &first, IteratorT const &last, 
          position_type const &pos, boost::wave::language_support language)
      { 
          return new_lexer_gen<IteratorT, position_type, TokenT>::new_lexer (
              first, last, pos, language); 
      }
  };
  
  ///////////////////////////////////////////////////////////////////////////////
  }   // namespace cpplexer
  }   // namespace wave
  }   // namespace boost 
  
  #ifdef BOOST_MSVC
  #pragma warning(pop)
  #endif
  
  // the suffix header occurs after all of the code
  #ifdef BOOST_HAS_ABI_HEADERS
  #include BOOST_ABI_SUFFIX
  #endif
  
  #endif // !defined(BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED)
  