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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
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/*=============================================================================
    Wave: A Standard compliant C++ preprocessor

    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(MACRO_TRACE_POLICIES_HPP_730ABBB5_51BB_458F_817B_47A42BDFD52A_INCLUDED)
#define MACRO_TRACE_POLICIES_HPP_730ABBB5_51BB_458F_817B_47A42BDFD52A_INCLUDED

#include <vector>

///////////////////////////////////////////////////////////////////////////////
namespace wave {
namespace macro_trace_policies {

///////////////////////////////////////////////////////////////////////////////
//  
//  The no_tracing class is a placeholder for all macro 
//  expansion trace hooks contained inside the macro expansion engine
//
///////////////////////////////////////////////////////////////////////////////
struct no_tracing {

    ///////////////////////////////////////////////////////////////////////////
    //  
    //  The function enable_tracing is called, whenever the status of the 
    //  tracing was changed.
    //
    //  The parameter 'enable' is to be used as the new tracing status.
    //  
    ///////////////////////////////////////////////////////////////////////////
    void enable_tracing(bool enable)
    {}
    
    ///////////////////////////////////////////////////////////////////////////
    //  
    //  The function 'expanding_function_like_macro' is called, whenever a 
    //  function-like macro is to be expanded.
    //
    //  The macroname parameter marks the position, where the macro to expand 
    //  is defined.
    //  The formal_args parameter holds the formal arguments used during the
    //  definition of the macro.
    //  The definition parameter holds the macro definition for the macro to 
    //  trace.
    //
    //  The macrocall parameter marks the position, where this macro invoked.
    //  The arguments parameter holds the macro arguments used during the 
    //  invocation of the macro
    //
    ///////////////////////////////////////////////////////////////////////////
    template <typename TokenT, typename ContainerT>
    void expanding_function_like_macro(
        TokenT const &macrodef, std::vector<TokenT> const &formal_args, 
        ContainerT const &definition,
        TokenT const &macrocall, std::vector<ContainerT> const &arguments) 
    {}

    ///////////////////////////////////////////////////////////////////////////
    //  
    //  The function 'expanding_object_like_macro' is called, whenever a 
    //  object-like macro is to be expanded .
    //
    //  The macroname parameter marks the position, where the macro to expand 
    //  is defined.
    //  The definition parameter holds the macro definition for the macro to 
    //  trace.
    //
    //  The macrocall parameter marks the position, where this macro invoked.
    //
    ///////////////////////////////////////////////////////////////////////////
    template <typename TokenT, typename ContainerT>
    void expanding_object_like_macro(TokenT const &macro, 
        ContainerT const &definition, TokenT const &macrocall)
    {}

    ///////////////////////////////////////////////////////////////////////////
    //  
    //  The function 'expanded_macro' is called, whenever the expansion of a 
    //  macro is finished but before the rescanning process starts.
    //
    //  The parameter 'result' contains the token sequence generated as the 
    //  result of the macro expansion.
    //
    ///////////////////////////////////////////////////////////////////////////
    template <typename ContainerT>
    void expanded_macro(ContainerT const &result)
    {}

    ///////////////////////////////////////////////////////////////////////////
    //  
    //  The function 'rescanned_macro' is called, whenever the rescanning of a 
    //  macro is finished.
    //
    //  The parameter 'result' contains the token sequence generated as the 
    //  result of the rescanning.
    //
    ///////////////////////////////////////////////////////////////////////////
    template <typename ContainerT>
    void rescanned_macro(ContainerT const &result)
    {}
};

///////////////////////////////////////////////////////////////////////////////
}   // namespace macro_trace_policy
}   // namespace wave

#endif // !defined(MACRO_TRACE_POLICIES_HPP_730ABBB5_51BB_458F_817B_47A42BDFD52A_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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