ceph/src/boost/libs/wave/include/boost/wave/cpplexer/cpp_lex_interface_generator.hpp

   1 /*=============================================================================
   2     Boost.Wave: A Standard compliant C++ preprocessor library
   3
   4     Definition of the abstract lexer interface
   5
   6     http://www.boost.org/
   7
   8     Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
   9     Software License, Version 1.0. (See accompanying file
  10     LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  11 =============================================================================*/
  12
  13 #if !defined(BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED)
  14 #define BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED
  15
  16 #include <boost/wave/wave_config.hpp>
  17 #include <boost/wave/util/file_position.hpp>
  18 #include <boost/wave/language_support.hpp>
  19 #include <boost/wave/cpplexer/cpp_lex_interface.hpp>
  20 #include <boost/wave/cpplexer/cpp_lex_token.hpp>      // lex_token
  21
  22 // this must occur after all of the includes and before any code appears
  23 #ifdef BOOST_HAS_ABI_HEADERS
  24 #include BOOST_ABI_PREFIX
  25 #endif
  26
  27 // suppress warnings about dependent classes not being exported from the dll
  28 #ifdef BOOST_MSVC
  29 #pragma warning(push)
  30 #pragma warning(disable : 4251 4231 4660)
  31 #endif
  32
  33 ///////////////////////////////////////////////////////////////////////////////
  34 namespace boost {
  35 namespace wave {
  36 namespace cpplexer {
  37
  38 #if BOOST_WAVE_SEPARATE_LEXER_INSTANTIATION != 0
  39 #define BOOST_WAVE_NEW_LEXER_DECL BOOST_WAVE_DECL
  40 #else
  41 #define BOOST_WAVE_NEW_LEXER_DECL
  42 #endif
  43
  44 ///////////////////////////////////////////////////////////////////////////////
  45 //
  46 //  new_lexer_gen: generates a new instance of the required C++ lexer
  47 //
  48 ///////////////////////////////////////////////////////////////////////////////
  49 template <
  50     typename IteratorT,
  51     typename PositionT = boost::wave::util::file_position_type,
  52     typename TokenT = lex_token<PositionT>
  53 >
  54 struct BOOST_WAVE_NEW_LEXER_DECL new_lexer_gen
  55 {
  56 //  The NewLexer function allows the opaque generation of a new lexer object.
  57 //  It is coupled to the token type to allow to decouple the lexer/token
  58 //  configurations at compile time.
  59     static lex_input_interface<TokenT> *
  60     new_lexer(IteratorT const &first, IteratorT const &last,
  61         PositionT const &pos, boost::wave::language_support language);
  62 };
  63
  64 #undef BOOST_WAVE_NEW_LEXER_DECL
  65
  66 ///////////////////////////////////////////////////////////////////////////////
  67 //
  68 //  The lex_input_interface_generator helps to instantiate a concrete lexer
  69 //  to be used by the Wave preprocessor module.
  70 //  This is done to allow compile time reduction.
  71 //
  72 ///////////////////////////////////////////////////////////////////////////////
  73
  74 template <typename TokenT>
  75 struct lex_input_interface_generator
  76 :   lex_input_interface<TokenT>
  77 {
  78     typedef typename lex_input_interface<TokenT>::position_type position_type;
  79
  80     lex_input_interface_generator() {}
  81     ~lex_input_interface_generator() {}
  82
  83 //  The new_lexer function allows the opaque generation of a new lexer object.
  84 //  It is coupled to the token type to allow to distinguish different
  85 //  lexer/token configurations at compile time.
  86     template <typename IteratorT>
  87     static lex_input_interface<TokenT> *
  88     new_lexer(IteratorT const &first, IteratorT const &last,
  89         position_type const &pos, boost::wave::language_support language)
  90     {
  91         return new_lexer_gen<IteratorT, position_type, TokenT>::new_lexer (
  92             first, last, pos, language);
  93     }
  94 };
  95
  96 ///////////////////////////////////////////////////////////////////////////////
  97 }   // namespace cpplexer
  98 }   // namespace wave
  99 }   // namespace boost
 100
 101 #ifdef BOOST_MSVC
 102 #pragma warning(pop)
 103 #endif
 104
 105 // the suffix header occurs after all of the code
 106 #ifdef BOOST_HAS_ABI_HEADERS
 107 #include BOOST_ABI_SUFFIX
 108 #endif
 109
 110 #endif // !defined(BOOST_WAVE_LEX_INTERFACE_GENERATOR_HPP_INCLUDED)