promote.hpp
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- /*
- * ===========================================================================
- * PRODUCTION $Log: promote.hpp,v $
- * PRODUCTION Revision 1000.1 2004/04/16 15:28:43 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [CATCHUP_003] Dev-tree R1.5
- * PRODUCTION
- * ===========================================================================
- */
- #ifndef UTIL_MATH___PROMOTE__HPP
- #define UTIL_MATH___PROMOTE__HPP
- /* $Id: promote.hpp,v 1000.1 2004/04/16 15:28:43 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Authors: Mike DiCuccio
- *
- * File Description:
- *
- */
- // we don't explicitly include <corelib/ncbistd.hpp> because this file is not
- // indented to be used directly
- BEGIN_NCBI_SCOPE
- //
- //
- // Promotion classes
- //
- //
- // the basic promotion type
- // we then provide a *lot* of specialized classes to perform the
- // correct promotions
- template <typename T, typename U> struct SPromoteTraits
- {
- public:
- typedef T TPromote;
- };
- // these defines makes adding new types much easier to understand
- //
- // first, a define to promote identical types to themselves
- #define NCBI_PROMOTE_TRAITS(type)
- template<> struct SPromoteTraits< type, type > {
- public:
- typedef type TPromote;
- }
- //
- // next, this type handles promotion of unlike types
- #define NCBI_PROMOTE2_TRAITS(type1,type2,type3)
- template<> struct SPromoteTraits< type1, type2 > {
- public:
- typedef type3 TPromote;
- };
- template<> struct SPromoteTraits< type2, type1 > {
- public:
- typedef type3 TPromote;
- }
- //
- // this macro makes the syntax a little easier to understand when declaring a
- // promoted type
- //
- #if defined(NCBI_COMPILER_MSVC) && (_MSC_VER <= 1200)
- # define NCBI_PROMOTE(a,b) SPromoteTraits< a, b >::TPromote
- #else
- # define NCBI_PROMOTE(a,b) typename SPromoteTraits< a, b >::TPromote
- #endif
- //
- // comparisons for built-in types
- // this is needed because we can define the correct sorts of type promotion
- // for various template classes and global operators
- //
- //
- // promotion of identical types
- NCBI_PROMOTE_TRAITS(char);
- NCBI_PROMOTE_TRAITS(unsigned char);
- NCBI_PROMOTE_TRAITS(short);
- NCBI_PROMOTE_TRAITS(unsigned short);
- NCBI_PROMOTE_TRAITS(int);
- NCBI_PROMOTE_TRAITS(unsigned int);
- NCBI_PROMOTE_TRAITS(float);
- NCBI_PROMOTE_TRAITS(double);
- NCBI_PROMOTE2_TRAITS(char, unsigned char, unsigned char);
- NCBI_PROMOTE2_TRAITS(char, short, short);
- NCBI_PROMOTE2_TRAITS(char, unsigned short, unsigned short);
- NCBI_PROMOTE2_TRAITS(char, int, int);
- NCBI_PROMOTE2_TRAITS(char, unsigned int, unsigned int);
- NCBI_PROMOTE2_TRAITS(char, float, float);
- NCBI_PROMOTE2_TRAITS(char, double, double);
- NCBI_PROMOTE2_TRAITS(unsigned char, short, short);
- NCBI_PROMOTE2_TRAITS(unsigned char, unsigned short, unsigned short);
- NCBI_PROMOTE2_TRAITS(unsigned char, int, int);
- NCBI_PROMOTE2_TRAITS(unsigned char, unsigned int, unsigned int);
- NCBI_PROMOTE2_TRAITS(unsigned char, float, float);
- NCBI_PROMOTE2_TRAITS(unsigned char, double, double);
- NCBI_PROMOTE2_TRAITS(short, unsigned short, unsigned short);
- NCBI_PROMOTE2_TRAITS(short, int, int);
- NCBI_PROMOTE2_TRAITS(short, unsigned int, unsigned int);
- NCBI_PROMOTE2_TRAITS(short, float, float);
- NCBI_PROMOTE2_TRAITS(short, double, double);
- NCBI_PROMOTE2_TRAITS(unsigned short, int, int);
- NCBI_PROMOTE2_TRAITS(unsigned short, unsigned int, unsigned int);
- NCBI_PROMOTE2_TRAITS(unsigned short, float, float);
- NCBI_PROMOTE2_TRAITS(unsigned short, double, double);
- NCBI_PROMOTE2_TRAITS(int, unsigned int, unsigned int);
- NCBI_PROMOTE2_TRAITS(int, float, float);
- NCBI_PROMOTE2_TRAITS(int, double, double);
- NCBI_PROMOTE2_TRAITS(unsigned int, float, float);
- NCBI_PROMOTE2_TRAITS(unsigned int, double, double);
- NCBI_PROMOTE2_TRAITS(float, double, double);
- END_NCBI_SCOPE
- /*
- * ===========================================================================
- * $Log: promote.hpp,v $
- * Revision 1000.1 2004/04/16 15:28:43 gouriano
- * PRODUCTION: UPGRADED [CATCHUP_003] Dev-tree R1.5
- *
- * Revision 1.5 2004/03/10 14:14:26 dicuccio
- * Changed include guard to be consistent. Moved commented portion to
- * gui-specific directory. Cleaned up error in template macros - add space around
- * types to avoid '>>' on brain-dead compilers
- *
- * Revision 1.4 2004/02/26 18:35:17 gorelenk
- * Added (_MSC_VER <= 1200) for definition of NCBI_PROMOTE - typename presents
- * causes a compilation error on MSVC 6.0.
- *
- * Revision 1.3 2004/02/26 17:44:29 dicuccio
- * Restore preprocessor guard for 'typename' in SPromote<>
- *
- * Revision 1.2 2004/02/26 16:52:34 gorelenk
- * Changed definition of NCBI_PROMOTE(a,b). MSVC compilers also demands
- * "typename" in this case.
- *
- * Revision 1.1 2004/02/09 17:34:12 dicuccio
- * Moved from gui/math
- *
- * Revision 1.4 2004/01/23 13:54:53 dicuccio
- * Lots of fixes. Wrapped promote type designation in a macro. Dropped use of
- * partial template specialization due to lack of support in MSVC
- *
- * Revision 1.3 2003/12/22 19:14:21 dicuccio
- * Fixed lots of bugs in referencing non-existent functions
- *
- * Revision 1.2 2003/06/09 19:45:19 dicuccio
- * Fixed promotion rules - defined TPromote in traits base class
- *
- * Revision 1.1 2003/06/09 19:30:50 dicuccio
- * Initial revision
- *
- * ===========================================================================
- */
- #endif // UTIL_MATH___PROMOTE___HPP