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Wave: a Standard conformant C++ preprocessor library

, 10 Jan 2004
Describes a free and fully Standard conformant C++ preprocessor library
wave_preprocessor_demo.zip
wave_preprocessor_demo1.zip
wave_preprocessor_src.zip
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/*=============================================================================
    Wave: A Standard compliant C++ preprocessor

    Test the C preprocessor
    Explicit instantiation of the lex_functor generation function
    
    Copyright (c) 2001-2003 Hartmut Kaiser
    http://spirit.sourceforge.net/

    Permission to copy, use, modify, sell and distribute this software
    is granted provided this copyright notice appears in all copies.
    This software is provided "as is" without express or implied
    warranty, and with no claim as to its suitability for any purpose.

    See Copyright.txt for full copyright notices and acknowledgements.
=============================================================================*/

#include "cpp.hpp"          // config data

#if defined(WAVE_SEPARATE_LEXER_INSTANTIATION) && defined(WAVE_USE_SLEX_CPP_LEXER)

#include <string>

#include "wave/cpplexer/cpp_token_ids.hpp"
#include "wave/cpplexer/cpp_lex_iterator.hpp"
#include "wave/cpplexer/cpp_lex_token.hpp"

///////////////////////////////////////////////////////////////////////////////
//  The following file needs to be included only once throughout the whole
//  program.
#include "wave/cpplexer/slex/cpp_slex_lexer.hpp"

///////////////////////////////////////////////////////////////////////////////
//
//  This instantiates the correct 'new_lexer' function, which generates the 
//  C++ lexer used in this sample. You will have to instantiate the 
//  new_lexer_gen<> template with the same iterator type, as you have used for
//  instantiating the wave::context<> object.
//
//  This is moved into a separate compilation unit to decouple the compilation
//  of the C++ lexer from the compilation of the other modules, which helps to 
//  reduce compilation time.
//
//  The template parameter(s) supplied should be identical to the first 
//  parameter supplied while instantiating the wave::context<> template (see 
//  the file cpp.cpp).
//
///////////////////////////////////////////////////////////////////////////////

template wave::cpplexer::new_lexer_gen<WAVE_STRINGTYPE::iterator>;

///////////////////////////////////////////////////////////////////////////////
//
//  If you've used another iterator type as std::string::iterator, you have to
//  instantiate the new_lexer_gen<> template even for this iterator type too.
//  The reason is, that the library internally uses the new_lexer_gen<> 
//  template with a std::string::iterator. (You just have to undefine the 
//  following line.)
//
///////////////////////////////////////////////////////////////////////////////

template wave::cpplexer::new_lexer_gen<std::string::iterator>;

#endif // defined(WAVE_SEPARATE_LEXER_INSTANTIATION) && defined(WAVE_USE_SLEX_CPP_LEXER)

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About the Author

Hartmut Kaiser

United States United States
Actively involved in Boost and the development of the Spirit parser construction framework.

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