// Copyright Aleksey Gurtovoy 2000-2006

//

// Distributed under the Boost Software License, Version 1.0. 

// (See accompanying file LICENSE_1_0.txt or copy at 

// http://www.boost.org/LICENSE_1_0.txt)

//

// See http://www.boost.org/libs/mpl for documentation.

// $Id: integral_wrapper.hpp 49267 2008-10-11 06:19:02Z agurtovoy $

// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $

// $Revision: 49267 $

// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION!

#include <boost/mpl/integral_c_tag.hpp>

#include <boost/mpl/aux_/static_cast.hpp>

#include <boost/mpl/aux_/nttp_decl.hpp>

#include <boost/mpl/aux_/config/static_constant.hpp>

#include <boost/mpl/aux_/config/workaround.hpp>

#include <boost/preprocessor/cat.hpp>

#if !defined(AUX_WRAPPER_NAME)

#   define AUX_WRAPPER_NAME BOOST_PP_CAT(AUX_WRAPPER_VALUE_TYPE,_)

#endif

#if !defined(AUX_WRAPPER_PARAMS)

#   define AUX_WRAPPER_PARAMS(N) BOOST_MPL_AUX_NTTP_DECL(AUX_WRAPPER_VALUE_TYPE, N)

#endif

#if !defined(AUX_WRAPPER_INST)

#   if BOOST_WORKAROUND(__MWERKS__, <= 0x2407)

#       define AUX_WRAPPER_INST(value) AUX_WRAPPER_NAME< value >

#   else 

#       define AUX_WRAPPER_INST(value) BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::AUX_WRAPPER_NAME< value >

#   endif

#endif

BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN

template< AUX_WRAPPER_PARAMS(N) >

struct AUX_WRAPPER_NAME

{

    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, value = N);

// agurt, 08/mar/03: SGI MIPSpro C++ workaround, have to #ifdef because some 

// other compilers (e.g. MSVC) are not particulary happy about it

#if BOOST_WORKAROUND(__EDG_VERSION__, <= 238)

    typedef struct AUX_WRAPPER_NAME type;

#else

    typedef AUX_WRAPPER_NAME type;

#endif

    typedef AUX_WRAPPER_VALUE_TYPE value_type;

    typedef integral_c_tag tag;

// have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC),

// while some other don't like 'value + 1' (Borland), and some don't like

// either

#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243)

 private:

    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)));

    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)));

 public:

    typedef AUX_WRAPPER_INST(next_value) next;

    typedef AUX_WRAPPER_INST(prior_value) prior;

#elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561)) \

    || BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(502)) \

    || (BOOST_WORKAROUND(__HP_aCC, <= 53800) && (BOOST_WORKAROUND(__hpxstd98, != 1)))

    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)) ) next;

    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)) ) prior;

#else

    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value + 1)) ) next;

    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value - 1)) ) prior;

#endif

    // enables uniform function call syntax for families of overloaded 

    // functions that return objects of both arithmetic ('int', 'long',

    // 'double', etc.) and wrapped integral types (for an example, see 

    // "mpl/example/power.cpp")

    operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); } 

};

#if !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION)

template< AUX_WRAPPER_PARAMS(N) >

AUX_WRAPPER_VALUE_TYPE const AUX_WRAPPER_INST(N)::value;

#endif

BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE

#undef AUX_WRAPPER_NAME

#undef AUX_WRAPPER_PARAMS

#undef AUX_WRAPPER_INST

#undef AUX_WRAPPER_VALUE_TYPE