mirror of
https://github.com/boostorg/wave.git
synced 2026-02-23 04:02:12 +00:00
83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/*=============================================================================
|
|
Wave: A Standard compliant C++ preprocessor library
|
|
|
|
Definition of the abstract lexer interface
|
|
|
|
Copyright (c) 2001-2004 Hartmut Kaiser
|
|
http://spirit.sourceforge.net/
|
|
|
|
Use, modification and distribution is subject to 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(SLEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED)
|
|
#define SLEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED
|
|
|
|
#include <boost/wave/language_support.hpp>
|
|
#include <boost/wave/util/file_position.hpp>
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
namespace boost {
|
|
namespace wave {
|
|
namespace cpp_token_sample {
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// new_lexer_gen: generates a new instance of the required C++ lexer
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
template <typename TokenT> struct slex_input_interface;
|
|
|
|
template <
|
|
typename IteratorT,
|
|
typename PositionT = boost::wave::util::file_position_t
|
|
>
|
|
struct 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 slex_input_interface<slex_token<PositionT> > *
|
|
new_lexer(IteratorT const &first, IteratorT const &last,
|
|
PositionT const &pos, boost::wave::language_support language);
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// The lex_input_interface decouples the lex_iterator_shim from the actual
|
|
// lexer. This is done to allow compile time reduction.
|
|
// Thanks to JCAB for having this idea.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
template <typename TokenT>
|
|
struct slex_input_interface
|
|
{
|
|
typedef typename TokenT::position_t position_t;
|
|
|
|
virtual TokenT get() = 0;
|
|
virtual void set_position(position_t const &pos) = 0;
|
|
|
|
virtual ~slex_input_interface() {}
|
|
|
|
// 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 slex_input_interface *
|
|
new_lexer(IteratorT const &first, IteratorT const &last,
|
|
position_t const &pos, boost::wave::language_support language)
|
|
{
|
|
return new_lexer_gen<IteratorT, position_t>::new_lexer (first, last,
|
|
pos, language);
|
|
}
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
} // namespace cpp_token_sample
|
|
} // namespace wave
|
|
} // namespace boost
|
|
|
|
#endif // !defined(SLEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED)
|