90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
/*=============================================================================
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Boost.Wave: A Standard compliant C++ preprocessor library
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Definition of the abstract lexer interface for the xpressive lexer
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http://www.boost.org/
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Copyright (c) 2001-2010 Hartmut Kaiser. Distributed under the Boost
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Software License, Version 1.0. (See accompanying file
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LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(XLEX_INTERFACE_HPP)
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#define XLEX_INTERFACE_HPP
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#include <boost/wave/language_support.hpp>
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#include <boost/wave/util/file_position.hpp>
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#include <boost/wave/cpplexer/cpp_lex_interface.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost {
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namespace wave {
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namespace cpplexer {
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namespace xlex {
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#if BOOST_WAVE_SEPARATE_LEXER_INSTANTIATION != 0
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#define BOOST_WAVE_NEW_LEXER_DECL BOOST_WAVE_DECL
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#else
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#define BOOST_WAVE_NEW_LEXER_DECL
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#endif
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///////////////////////////////////////////////////////////////////////////////
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//
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// new_lexer_gen: generates a new instance of the required C++ lexer
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//
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///////////////////////////////////////////////////////////////////////////////
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template <
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typename IteratorT,
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typename PositionT = wave::util::file_position_type
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>
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struct BOOST_WAVE_NEW_LEXER_DECL new_lexer_gen
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{
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// The NewLexer function allows the opaque generation of a new lexer object.
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// It is coupled to the token type to allow to decouple the lexer/token
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// configurations at compile time.
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static wave::cpplexer::lex_input_interface<wave::cpplexer::lex_token<PositionT> > *
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new_lexer(IteratorT const &first, IteratorT const &last,
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PositionT const &pos, wave::language_support language);
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};
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#undef BOOST_WAVE_NEW_LEXER_DECL
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///////////////////////////////////////////////////////////////////////////////
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//
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// The xlex_input_interface helps to instantiate a concrete lexer to be used
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// by the Wave preprocessor module.
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// This is done to allow compile time reduction.
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//
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///////////////////////////////////////////////////////////////////////////////
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template <typename TokenT>
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struct xlex_input_interface
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: lex_input_interface<TokenT>
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{
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typedef typename wave::cpplexer::lex_input_interface<TokenT>::position_type
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position_type;
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~xlex_input_interface() {}
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// The new_lexer function allows the opaque generation of a new lexer object.
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// It is coupled to the token type to allow to distinguish different
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// lexer/token configurations at compile time.
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template <typename IteratorT>
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static wave::cpplexer::lex_input_interface<TokenT> *
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new_lexer(IteratorT const &first, IteratorT const &last,
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position_type const &pos, wave::language_support language)
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{
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return new_lexer_gen<IteratorT, position_type>::new_lexer (first, last,
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pos, language);
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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} // namespace xlex
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} // namespace cpplexer
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} // namespace wave
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} // namespace boost
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#endif // !defined(XLEX_INTERFACE_HPP)
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