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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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test_lexer.in
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wave_preprocessor_src1.zip
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boost-build.jam
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project-root.jam
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runtests.sh
cpp.re
lextest.in
lextest.output
run_tests.sh
test_lexer.in
test_lexer.output
lextest.in
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run_tests.sh
/*=============================================================================
    Wave: A Standard compliant C++ preprocessor

    Global application configuration
    
    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.
=============================================================================*/

#if !defined(CPP_CONFIG_HPP_F143F90A_A63F_4B27_AC41_9CA4F14F538D_INCLUDED)
#define CPP_CONFIG_HPP_F143F90A_A63F_4B27_AC41_9CA4F14F538D_INCLUDED

///////////////////////////////////////////////////////////////////////////////
//  Decide, whether to implement macro scopes (#scope/#endscope), variadics,
//  placemarkers and well defined token pasting in C++ mode
//
//  To implement these features, uncomment the following
//
#define WAVE_ENABLE_CPP0X_EXTENSIONS

///////////////////////////////////////////////////////////////////////////////
//  Define the macro scoping keywords to be used for the experimental macro 
//  scoping support.
//
//  If the following macros aren't defined, the corresponding default value is 
//  used.
//
//  Note, if you change this, you will have to change the corresponding entries 
//  inside the wave/cpplexer/re2c/cpp.re file too.
//
//#define WAVE_PP_REGION          "region"
//#define WAVE_PP_REGION_UC       "REGION"      // uppercase of WAVE_PP_REGION
//#define WAVE_PP_ENDREGION       "endregion"
//#define WAVE_PP_IMPORT          "import"

///////////////////////////////////////////////////////////////////////////////
//  Define the maximal include nesting depth allowed. If this value isn't 
//  defined it defaults to 1024
//
//  To define a new initial include nesting depth uncomment the following and 
//  supply a new integer value.
//
//#define WAVE_MAX_INCLUDE_LEVEL_DEPTH 1024

///////////////////////////////////////////////////////////////////////////////
//  Decide, whether to support variadics and placemarkers
//
//  To implement support variadics and placemarkers uncomment the following
//
#define WAVE_SUPPORT_VARIADICS_PLACEMARKERS

///////////////////////////////////////////////////////////////////////////////
//  Decide, whether to implement a #warning directive as 
//
//  To implement #warning directives, uncomment the following
//
#define WAVE_SUPPORT_WARNING_DIRECTIVE

///////////////////////////////////////////////////////////////////////////////
//  Undefine the following, to enable some MS specific language extensions:
//  __int8, __int16, __int32, __int64, __based, __declspec, __cdecl, 
//  __fastcall, __stdcall, __try, __except, __finally, __leave, __inline,
//  __asm
//#define WAVE_SUPPORT_MS_EXTENSIONS

///////////////////////////////////////////////////////////////////////////////
//  Allow the message body of the #error and #warning directives to be 
//  preprocessed before the diagnostic is issued.
//
//  Uncommenting the following will preprocess the message bodies of #error and
//  #warning messages before the error (warning) is issued
//
#define WAVE_PREPROCESS_ERROR_MESSAGE_BODY

///////////////////////////////////////////////////////////////////////////////
//  Allow the #pragma directives to be returned to the caller (optionally after 
//  preprcessing the body) 
//
//  Undefining the following will skip #pragma directives, so that the caller
//  will not see them.
//
#define WAVE_EMIT_PRAGMA_DIRECTIVES

///////////////////////////////////////////////////////////////////////////////
//  Allow the body of a #pragma directive to be preprocessed before the 
//  directive is returned to the caller.
//
//  Uncommenting the following will preprocess the bodies of #pragma directives
//
#define WAVE_PREPROCESS_PRAGMA_BODY

///////////////////////////////////////////////////////////////////////////////
//  Allow to define macros with the commandline syntax (-DMACRO(x)=definition)
//
//  Uncommenting the following will disable the possibility to define macros
//  based on the commandline syntax
//
#define WAVE_ENABLE_COMMANDLINE_MACROS

///////////////////////////////////////////////////////////////////////////////
//  Define the string type to be used to store the token values and the file 
//  names inside a file_position template class
//
//  If this isn't defined, it defaults to std::string
//
#define WAVE_STRINGTYPE wave::util::flex_string< \
        char, std::char_traits<char>, std::allocator<char>, \
            wave::util::CowString<char, \
                wave::util::AllocatorStringStorage<char> > \
    > \
    /**/

///////////////////////////////////////////////////////////////////////////////
// Decide, which C++ lexer to use (choose one!)
//
//#define WAVE_USE_SLEX_CPP_LEXER         // use the SLex based C++ lexer
#define WAVE_USE_RE2C_CPP_LEXER       // use the Re2C based C++ lexer

#if (defined(WAVE_USE_SLEX_CPP_LEXER) && defined(WAVE_USE_RE2C_CPP_LEXER)) || \
    (!defined(WAVE_USE_SLEX_CPP_LEXER) && !defined(WAVE_USE_RE2C_CPP_LEXER))
#error "Please choose exactly one C++ lexer to use" \
    " (define WAVE_USE_SLEX_CPP_LEXER or WAVE_USE_RE2C_CPP_LEXER)"
#endif

///////////////////////////////////////////////////////////////////////////////
//  Uncomment the following, if you need debug output, the 
//  BOOST_SPIRIT_DEBUG_FLAGS constants below help to fine control the amount of 
//  the generated debug output
//#define BOOST_SPIRIT_DEBUG

///////////////////////////////////////////////////////////////////////////////
//  debug rules, subrules and grammars only, for possible flags see 
//  spirit/debug.hpp
#define BOOST_SPIRIT_DEBUG_FLAGS ( \
        BOOST_SPIRIT_DEBUG_FLAGS_NODES | \
        BOOST_SPIRIT_DEBUG_FLAGS_CLOSURES \
    ) \
    /**/

///////////////////////////////////////////////////////////////////////////////
//  debug flags for the pp-iterator library, possible flags:
#define BOOST_SPIRIT_DEBUG_FLAGS_CPP_GRAMMAR            0x0001
#define BOOST_SPIRIT_DEBUG_FLAGS_TIME_CONVERSION        0x0002
#define BOOST_SPIRIT_DEBUG_FLAGS_CPP_EXPR_GRAMMAR       0x0004
#define BOOST_SPIRIT_DEBUG_FLAGS_INTLIT_GRAMMAR         0x0008
#define BOOST_SPIRIT_DEBUG_FLAGS_FLOATLIT_GRAMMAR       0x0010
#define BOOST_SPIRIT_DEBUG_FLAGS_CHLIT_GRAMMAR          0x0020
#define BOOST_SPIRIT_DEBUG_FLAGS_DEFINED_GRAMMAR        0x0040
#define BOOST_SPIRIT_DEBUG_FLAGS_PREDEF_MACROS_GRAMMAR  0x0080

#define BOOST_SPIRIT_DEBUG_FLAGS_CPP (\
        BOOST_SPIRIT_DEBUG_FLAGS_CPP_GRAMMAR | \
        BOOST_SPIRIT_DEBUG_FLAGS_CPP_EXPR_GRAMMAR \
    ) \
    /**/

///////////////////////////////////////////////////////////////////////////////
//
//  For all recognized preprocessor statements the output parse trees 
//  formatted as xml are printed. The formatted parse trees are streamed to the 
//  std::ostream defined by the WAVE_DUMP_PARSE_TREE_OUT constant.
//
//  Uncomment the following, if you want to see these parse trees. 
//
//#define WAVE_DUMP_PARSE_TREE
//#define WAVE_DUMP_PARSE_TREE_OUT std::cerr

///////////////////////////////////////////////////////////////////////////////
//
//  For all #if and #elif directives the preprocessed expressions are printed.
//  These expressions are streamed to the std::ostream defined by the 
//  WAVE_DUMP_CONDITIONAL_EXPRESSIONS_OUT constant.
//
//  Uncomment the following, if you want to see the preprocessed expressions
//
//#define WAVE_DUMP_CONDITIONAL_EXPRESSIONS
//#define WAVE_DUMP_CONDITIONAL_EXPRESSIONS_OUT std::cerr

///////////////////////////////////////////////////////////////////////////////
//  Decide, whether to use the separate compilation model for the instantiation 
//  of the C++ lexer objects.
//
//  If this is defined, you should explicitly instantiate the C++ lexer
//  template with the correct parameters in a separate compilation unit of
//  your program (see the files instantiate_slex_lexer.cpp and
//  instantiate_re2c_lexer.cpp). 
//
//  To use the lexer inclusion model, uncomment the following 
//
#define WAVE_SEPARATE_LEXER_INSTANTIATION

///////////////////////////////////////////////////////////////////////////////
//  Decide, whether to use the separate compilation model for the instantiation 
//  of the grammar objects.
//
//  If this is defined, you should explicitly instantiate the grammar
//  templates with the correct parameters in a separate compilation unit of
//  your program (see the files instantiate_cpp_grammar.cpp). 
//
//  To use the grammar inclusion model, uncomment the following 
//
#define WAVE_SEPARATE_GRAMMAR_INSTANTIATION

///////////////////////////////////////////////////////////////////////////////
//  You shouldn't have to change anything below

#if defined(BOOST_MSVC) && !defined(__COMO__)
#pragma warning (disable: 4355) // 'this' used in base member initializer list
#pragma warning (disable: 4800) // forcing value to bool 'true' or 'false' (performance warning)
#pragma inline_depth(255)
#pragma inline_recursion(on)
#endif // defined(BOOST_MSVC)

///////////////////////////////////////////////////////////////////////////////
//  The experimental C++0x mode implies the variadics and placemarkers
#if defined(WAVE_ENABLE_CPP0X_EXTENSIONS) && !defined(WAVE_SUPPORT_VARIADICS_PLACEMARKERS)
#define WAVE_SUPPORT_VARIADICS_PLACEMARKERS
#endif // 

#endif // !defined(CPP_CONFIG_HPP_F143F90A_A63F_4B27_AC41_9CA4F14F538D_INCLUDED)

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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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