boost/wave/cpplexer/cpp_lex_interface_generator.hpp
/*=============================================================================
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)
