FactoryMacros.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
 *   ensure the GNU General Public License version 3.0 requirements will be
 *   met: http://www.gnu.org/copyleft/gpl.html.
 *   Alternatively you may (at your option) use any later version of the GNU
 *   General Public License if such license has been publicly approved by
 *   MLAB and NICR (or its successors, if any).
 *
 * IN NO EVENT SHALL "MLAB" OR "NICR" BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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 * "NICR" HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND "MLAB" AND "NICR" HAVE NO OBLIGATION TO
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 */

#ifndef _MIRA_FACTORYMACROS_H_
#define _MIRA_FACTORYMACROS_H_

#ifndef Q_MOC_RUN
#include <boost/mpl/assert.hpp>
#endif

#include <platform/Typename.h>

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_TEMPLATE_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_TEMPLATE_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_NO_PUBLIC_DEFAULT_CONSTRUCTOR__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_NO_PUBLIC_DEFAULT_CONSTRUCTOR__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};


namespace mira {


inline std::string mira_stripNameFromIdentifier( std::string const& identifier )
{
    size_t pos = std::string::npos;
    if ( identifier[identifier.length()-1] == '>' )
        pos = identifier.rfind('<');
    std::string tReturn = ( identifier.rfind("::",pos) != std::string::npos ) ?
            identifier.substr( identifier.rfind("::",pos) + 2 )
            : identifier;
    return tReturn;
}


// *****************************************************************************
// *** ClassFactory MACROS (Protected)
// *****************************************************************************

#define MIRA_OBJECT_BASE( classIdentifier ) \
    friend class mira::ClassFactory; \
    \
    template<typename pCLASS, typename pBASECLASS> \
    friend struct mira::FactoryRegisterClassHelper; \
    \
    template<typename pCLASS> \
    friend class mira::TClass; \
\
public: \
 \
    mira::TClass<classIdentifier> const& getClass() const { \
        /* This should do the trick, since all TClasses should be of the same*/\
        /* structure and size. However, if you get a serious error here, keep*/\
        /* it private because i will be really really disenchanted otherwise.*/\
        return \
            static_cast<mira::TClass<classIdentifier> const&>( internalGetClass() ); \
    } \
    \
 \
    static mira::TClass<classIdentifier> const& CLASS() { \
        return _CLASS(); \
    } \
\
protected: \
 \
    virtual mira::Class& internalGetClass() const { \
        return _CLASS(); \
    } \
    static mira::TClass<classIdentifier>& _staticClassObject( \
            std::string const& identifier, \
            std::string const& name, \
            bool libLoaded);


// *****************************************************************************
// *** ClassFactory MACROS (Public)
// *****************************************************************************

#define MIRA_NAMEDOBJECT( classIdentifier, className ) \
    MIRA_OBJECT_BASE( MIRA_PPARAM( classIdentifier ) ) \
    \
 \
    static mira::TClass<classIdentifier>& _CLASS() { \
        return _staticClassObject( mira::typeName<classIdentifier>(), \
            #className, true ); \
    } \
private: \
 \
    static void addMetaInfo( std::map<std::string, std::string>& metaMap ) \
    { \
        /* No meta info given -> do nothing */ \
    }


#define MIRA_OBJECT( classIdentifier ) \
    MIRA_OBJECT_BASE( MIRA_PPARAM( classIdentifier ) ) \
    \
 \
    static mira::TClass<classIdentifier>& _CLASS() { \
        return _staticClassObject( mira::typeName<classIdentifier>(), \
            mira::mira_stripNameFromIdentifier( \
                    mira::typeName<classIdentifier>() ), true ); \
    } \
private: \
 \
    static void addMetaInfo( std::map<std::string, std::string>& metaMap ) \
    { \
        /* No meta info given -> do nothing */ \
    }


#define MIRA_META_OBJECT( classIdentifier, MetaInfo ) \
    MIRA_OBJECT_BASE( MIRA_PPARAM( classIdentifier ) ) \
    \
 \
    static mira::TClass<classIdentifier>& _CLASS() { \
        return _staticClassObject( mira::typeName<classIdentifier>(), \
            mira::mira_stripNameFromIdentifier( \
                    mira::typeName<classIdentifier>() ), true ); \
    } \
private: \
 \
    static void addMetaInfo( std::map<std::string, std::string>& metaMap ) \
    { \
        /* append given meta information to the map */ \
        boost::assign::insert( metaMap ) MetaInfo; \
    }


#define MIRA_ABSTRACT_OBJECT( classIdentifier ) \
    MIRA_META_OBJECT( MIRA_PPARAM( classIdentifier ), ("AbstractClass", mira::typeName<classIdentifier>()) )

#define MIRA_ABSTRACT_META_OBJECT( classIdentifier, MetaInfo ) \
    MIRA_META_OBJECT( MIRA_PPARAM( classIdentifier ), ("AbstractClass", mira::typeName<classIdentifier>())MetaInfo )


#define MIRA_CLASS_REGISTER( Class, ... ) \
    /* generate error message if macro is not used in global namespace */ \
    template <> int \
    ________________________________PLEASE_USE_THE__MIRA_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________ \
    <Class>::FOR_CLASS() { return 0; } \
    MIRA_REGISTRAR( MIRA_PPARAM( mira::FactoryRegisterClass<Class, __VA_ARGS__> ) ) \
    mira::TClass<Class>& Class::_staticClassObject(std::string const& identifier, \
                                                   std::string const& name, \
                                                   bool libLoaded) { \
        static mira::TClass<Class> sClass(identifier, name, libLoaded); \
        return sClass; \
    }

#define MIRA_NO_PUBLIC_DEFAULT_CONSTRUCTOR(CLASS) \
    namespace mira { \
        template<> \
        class HasPublicDefaultConstructor<CLASS> : public std::false_type {}; \
    }

inline std::string replaceTemplateGeneric( std::string const& genericIdent,
            std::string const& specialIdent )
{
    size_t tFirstOccGeneric = genericIdent.find('<');
    size_t tLastOccGeneric = genericIdent.rfind('>');
    size_t tFirstOccSpecial = specialIdent.find('<');
    size_t tLastOccSpecial = specialIdent.rfind('>');

    assert( tFirstOccGeneric != std::string::npos &&
            tLastOccGeneric != std::string::npos );

    assert( tFirstOccSpecial != std::string::npos &&
            tLastOccSpecial != std::string::npos );

    std::string tReturnValue = genericIdent;

    return tReturnValue.replace( tFirstOccGeneric, tLastOccGeneric-tFirstOccGeneric,
            specialIdent.substr( tFirstOccSpecial,
            tLastOccSpecial - tFirstOccSpecial ) );
}


#define MIRA_INTERNAL_OPEN_NAMESPACE(r,data,t) \
        namespace t {

#define MIRA_INTERNAL_CLOSE_NAMESPACE(r,data,t) }

#define MIRA_VA_NUM_ARGS(...) MIRA_VA_NUM_ARGS_IMPL(__VA_ARGS__,5,4,3,2,1)
#define MIRA_VA_NUM_ARGS_IMPL(_1,_2,_3,_4,_5,N,...) N


// see: http://www.mail-archive.com/boost@lists.boost.org/msg03318.html
#define MIRA_MAKE_SEQ(size, rel) MIRA_MAKE_SEQ_D(size, rel)
#define MIRA_MAKE_SEQ_D(size, rel) \
        BOOST_PP_CAT( \
                MIRA_MAKE_SEQ_A_ ## size rel, \
                0X0 \
        )() \
        

// size 1
#define MIRA_MAKE_SEQ_A_1(a) ((a)) MIRA_MAKE_SEQ_B_1
#define MIRA_MAKE_SEQ_B_1(a) ((a)) MIRA_MAKE_SEQ_A_1

#define MIRA_MAKE_SEQ_A_10X0()
#define MIRA_MAKE_SEQ_B_10X0()

// size 2
#define MIRA_MAKE_SEQ_A_2(a, b) ((a, b)) MIRA_MAKE_SEQ_B_2
#define MIRA_MAKE_SEQ_B_2(a, b) ((a, b)) MIRA_MAKE_SEQ_A_2

#define MIRA_MAKE_SEQ_A_20X0()
#define MIRA_MAKE_SEQ_B_20X0()

// size 3
#define MIRA_MAKE_SEQ_A_3(a, b, c) ((a, b, c)) MIRA_MAKE_SEQ_B_3
#define MIRA_MAKE_SEQ_B_3(a, b, c) ((a, b, c)) MIRA_MAKE_SEQ_A_3

#define MIRA_MAKE_SEQ_A_30X0()
#define MIRA_MAKE_SEQ_B_30X0()

// size 4
#define MIRA_MAKE_SEQ_A_4(a, b, c, d) ((a, b, c, d)) MIRA_MAKE_SEQ_B_4
#define MIRA_MAKE_SEQ_B_4(a, b, c, d) ((a, b, c, d)) MIRA_MAKE_SEQ_A_4

#define MIRA_INTERNAL_PRINT_TOKEN(TOKEN)    #TOKEN

#define MIRA_DO_NOTHING(Sequence,StartId)

#define MIRA_INTERNAL_NAMESPACE_FOLD(r,data,t) \
    t::data

#define MIRA_INTERNAL_CONC_NAMESPACE_IMPL(Sequence, StartId) \
    BOOST_PP_SEQ_FOLD_RIGHT(MIRA_INTERNAL_NAMESPACE_FOLD,,BOOST_PP_SEQ_REST_N(StartId,Sequence))

#define MIRA_INTERNAL_CONC_NAMESPACE(Sequence,StartId) \
    /* check if namespace size is greater zero and delay evaluation */ \
    BOOST_PP_IF( BOOST_PP_SEQ_SIZE( BOOST_PP_SEQ_REST_N( StartId, Sequence) ), \
        /* length of namespace is greater zero */ \
        MIRA_INTERNAL_CONC_NAMESPACE_IMPL \
        /* we do not have a namespace -> do nothing */ \
        , MIRA_DO_NOTHING )(Sequence, StartId)

#define MIRA_INTERNAL_TEMPLATE_CLASS_REGISTER( r, Args, TmplSpec) \
    /* Args(0) - contains the Class itself */ \
    /* Args(1) - number of parents k */ \
    /* Args(2) - number of template parameters */ \
    /* Args(3) - address n of first namespace token in sequence Args */ \
    /* Args(4 -- 4+k) - parents */ \
    /* Args(n -- end) - namespace */ \
    MIRA_REGISTRAR( MIRA_PPARAM( mira::FactoryRegisterClass< \
        /* the folding process adds the namespace, if the namesapce sequence*/ \
        /* length is greater than zero (with delayed evaluation) */ \
        BOOST_PP_IF( BOOST_PP_SEQ_SIZE( BOOST_PP_SEQ_REST_N( \
                BOOST_PP_SEQ_ELEM(3,Args),Args) ), \
        /* length of namespace is greater zero */ \
        MIRA_INTERNAL_CONC_NAMESPACE_IMPL \
        /* we do not have a namespace -> do nothing */ \
        , MIRA_DO_NOTHING )( Args, BOOST_PP_SEQ_ELEM(3,Args) )  \
        BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR( BOOST_PP_SEQ_ELEM(2,Args), TmplSpec)>, \
        BOOST_PP_SEQ_ENUM(BOOST_PP_SEQ_SUBSEQ(Args,4,BOOST_PP_SEQ_ELEM(1,Args)))> ) ) \


#define MIRA_INTERNAL_TEMPLATE_CLASS_STATIC( r, Args, TmplSpec) \
    /* Args(0) contains the Class itself */ \
    /* Args(1) contains the number of template parameters */ \
    template<> mira::TClass<\
        BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)> >& \
        BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)>::_staticClassObject( \
                                            std::string const& identifier, \
                                            std::string const& name, \
                                            bool libLoaded) { \
        static mira::TemplateClass<BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)> > \
            sClass(identifier, name, libLoaded); \
        return sClass; \
    } \


#define MIRA_TMPL_SPEC_CONCAT(r, data, i, elem) "," BOOST_PP_STRINGIZE(elem)

#define TAIL_NAME( Seq ) \
    BOOST_PP_SEQ_FOR_EACH_I( MIRA_TMPL_SPEC_CONCAT, , Seq)

#define MIRA_INTERNAL_TEMPLATE_IDENTIFIER( r, Args, TmplSpec) \
    /* Args(0) contains the Class itself */ \
    /* Args(1) contains the number of template parameters */ \
    /* Args(2-n) contains the namespace */ \
    template<> \
    /* the folding process adds the namespace */ \
    std::string const& TemplateClass<MIRA_INTERNAL_CONC_NAMESPACE(Args,2) \
        BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)> >::getIdentifier() const { \
        /* we should use a combination of the generic and the specialized */ \
        /* here since the generic string should include the namespace.*/ \
        static std::string tIdent = replaceTemplateGeneric( \
            TClass<MIRA_INTERNAL_CONC_NAMESPACE(Args,2) \
                BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)> >::getIdentifier(), \
                "<" \
                BOOST_PP_STRINGIZE(BOOST_PP_SEQ_HEAD(BOOST_PP_TUPLE_TO_SEQ(BOOST_PP_SEQ_ELEM(1,Args),TmplSpec))) \
                /* use for_each_i here since recursion of fore_each is not allowed */ \
                BOOST_PP_SEQ_FOR_EACH_I( MIRA_TMPL_SPEC_CONCAT, , BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_TO_SEQ(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec))) \
                ">" ); \
        return tIdent; \
    } \
    \
    template<> \
    /* the folding process adds the namespace */ \
    std::string const& TemplateClass<MIRA_INTERNAL_CONC_NAMESPACE(Args,2) \
        BOOST_PP_SEQ_ELEM(0,Args)<BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_SEQ_ELEM(1,Args), TmplSpec)> >::getName() const { \
        static std::string tName = mira_stripNameFromIdentifier( \
                getIdentifier() ); \
        return tName; \
    } \


#define MIRA_TEMPLATE_CLASS_REGISTER( Namespace, Class, TmplSpec, ... ) \
        MIRA_TEMPLATE_CLASS_REGISTER_IMPL( Namespace, Class, 1, MIRA_MAKE_SEQ(1,TmplSpec), __VA_ARGS__ )

#define MIRA_VARTEMPLATE_CLASS_REGISTER( Namespace, Class, NumTmplPrm, TmplSpec, ... ) \
        MIRA_TEMPLATE_CLASS_REGISTER_IMPL( Namespace, Class, NumTmplPrm, MIRA_MAKE_SEQ(NumTmplPrm,TmplSpec), __VA_ARGS__ )


#define MIRA_TMPL_SIG_FROM_SEQ( NumTmplPrm, SeqId, Sequence )\
    BOOST_PP_TUPLE_REM_CTOR( NumTmplPrm, BOOST_PP_SEQ_ELEM(SeqId,Sequence) )

#define MIRA_TEMPLATE_CLASS_REGISTER_IMPL( Namespace, Class, NumTmplPrm, TmplSpec, ... ) \
    /* generate error message if macro is not used in global namespace */ \
    template <> int \
    ________________________________PLEASE_USE_THE__MIRA_TEMPLATE_CLASS_REGISTER__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________\
    <MIRA_INTERNAL_CONC_NAMESPACE(Namespace,0)Class \
    <MIRA_TMPL_SIG_FROM_SEQ(NumTmplPrm,0,TmplSpec)> >::FOR_CLASS() { return 0; } \
    /* the following lines build up a sequence for the internal register macro*/\
    /* structure: (Class)(Number of Parents)(Address of first namespace token */\
    /* in the sequence)(Parents as sequence)(Namespace as sequence) */ \
    BOOST_PP_SEQ_FOR_EACH(MIRA_INTERNAL_TEMPLATE_CLASS_REGISTER, \
        (Class) \
        (MIRA_VA_NUM_ARGS(__VA_ARGS__))(NumTmplPrm)(BOOST_PP_ADD(MIRA_VA_NUM_ARGS(__VA_ARGS__),4))\
            BOOST_PP_TUPLE_TO_SEQ(MIRA_VA_NUM_ARGS(__VA_ARGS__),(__VA_ARGS__)) \
            Namespace,TmplSpec)  \
    \
    /* we can only specialize the the template in the corresponding namespace */\
    /* check if length of namespace is greater than zero */ \
    BOOST_PP_IF( BOOST_PP_SEQ_SIZE( Namespace ), \
    /* length of namespace is greater zero */ \
    BOOST_PP_SEQ_FOR_EACH(MIRA_INTERNAL_OPEN_NAMESPACE,~,Namespace) \
    /* length of namespace is zero -> do nothing */ \
    , ) \
        /* we have to combine all parameters in a boost pp sequence in order */ \
        /* to pass them to the internal macro */ \
        /* Register the class at the factory */ \
        BOOST_PP_SEQ_FOR_EACH(MIRA_INTERNAL_TEMPLATE_CLASS_STATIC, \
            (Class)(NumTmplPrm), TmplSpec) \
    /* check if length of namespace is greater than zero */ \
    BOOST_PP_IF( BOOST_PP_SEQ_SIZE( Namespace ), \
    /* length of namespace is greater zero */ \
    BOOST_PP_SEQ_FOR_EACH(MIRA_INTERNAL_CLOSE_NAMESPACE,~,Namespace) \
    /* length of namespace is zero -> do nothing */ \
    , ) \
    \
    namespace mira { \
        /* Specialize the functions to obtain the template identifiers */ \
        BOOST_PP_SEQ_FOR_EACH(MIRA_INTERNAL_TEMPLATE_IDENTIFIER, \
            (Class)(NumTmplPrm)Namespace,TmplSpec) \
    }



} // namespace

#endif /* _MIRA_FACTORYMACROS_H_ */