

#ifndef BOOST_MPL_ASSERT_HPP_INCLUDED

#define BOOST_MPL_ASSERT_HPP_INCLUDED



// 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.



// $Source$

// $Date: 2007-11-25 13:07:19 -0500 (Sun, 25 Nov 2007) $

// $Revision: 41369 $



#include <boost/mpl/not.hpp>

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

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

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

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

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



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

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

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

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

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

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

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



#include <boost/preprocessor/cat.hpp>



#include <boost/config.hpp> // make sure 'size_t' is placed into 'std'

#include <cstddef>





#if BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, < 0x600) \

    || (BOOST_MPL_CFG_GCC != 0) \

    || BOOST_WORKAROUND(__IBMCPP__, <= 600)

#   define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES

#endif



#if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \

    || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \

    || BOOST_WORKAROUND(__BORLANDC__, < 0x600) \

    || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840))

#   define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER

#endif



// agurt, 10/nov/06: use enums for Borland (which cannot cope with static constants) 

// and GCC (which issues "unused variable" warnings when static constants are used 

// at a function scope)

#if BOOST_WORKAROUND(__BORLANDC__, < 0x600) \

    || (BOOST_MPL_CFG_GCC != 0)

#   define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) enum { expr }

#else

#   define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) BOOST_STATIC_CONSTANT(T, expr)

#endif





BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN



struct failed {};



// agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept 

// 'assert<false>' by reference; can't apply it unconditionally -- apparently it

// degrades the quality of GCC diagnostics

#if BOOST_WORKAROUND(BOOST_MSVC, == 1310)

#   define AUX778076_ASSERT_ARG(x) x&

#else

#   define AUX778076_ASSERT_ARG(x) x

#endif



template< bool C >  struct assert        { typedef void* type; };

template<>          struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; };



template< bool C >

int assertion_failed( typename assert<C>::type );



template< bool C >

struct assertion

{

    static int failed( assert<false> );

};



template<>

struct assertion<true>

{

    static int failed( void* );

};



struct assert_

{

#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)

    template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {};

#endif

    static assert_ const arg;

    enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal };

};





#if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)



bool operator==( failed, failed );

bool operator!=( failed, failed );

bool operator>( failed, failed );

bool operator>=( failed, failed );

bool operator<( failed, failed );

bool operator<=( failed, failed );



#if defined(__EDG_VERSION__)

template< bool (*)(failed, failed), long x, long y > struct assert_relation {};

#   define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y>

#else

template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) > 

struct assert_relation {};

#   define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r>

#endif



#else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES



boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ );

boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ );

boost::mpl::aux::weighted_tag<3>::type operator>(  assert_, assert_ );

boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ );

boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ );

boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ );



template< assert_::relations r, long x, long y > struct assert_relation {};



#endif 





#if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)



template< bool > struct assert_arg_pred_impl { typedef int type; };

template<> struct assert_arg_pred_impl<true> { typedef void* type; };



template< typename P > struct assert_arg_pred

{

    typedef typename P::type p_type;

    typedef typename assert_arg_pred_impl< p_type::value >::type type;

};



template< typename P > struct assert_arg_pred_not

{

    typedef typename P::type p_type;

    BOOST_MPL_AUX_ASSERT_CONSTANT( bool, p = !p_type::value );

    typedef typename assert_arg_pred_impl<p>::type type;

};



template< typename Pred >

failed ************ (Pred::************ 

      assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type )

    );



template< typename Pred >

failed ************ (boost::mpl::not_<Pred>::************ 

      assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type )

    );



template< typename Pred >

AUX778076_ASSERT_ARG(assert<false>)

assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type );



template< typename Pred >

AUX778076_ASSERT_ARG(assert<false>)

assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type );





#else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER

        

template< bool c, typename Pred > struct assert_arg_type_impl

{

    typedef failed      ************ Pred::* mwcw83_wknd;

    typedef mwcw83_wknd ************* type;

};



template< typename Pred > struct assert_arg_type_impl<true,Pred>

{

    typedef AUX778076_ASSERT_ARG(assert<false>) type;

};



template< typename Pred > struct assert_arg_type

    : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred >

{

};



template< typename Pred >

typename assert_arg_type<Pred>::type 

assert_arg(void (*)(Pred), int);



template< typename Pred >

typename assert_arg_type< boost::mpl::not_<Pred> >::type 

assert_not_arg(void (*)(Pred), int);



#   if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)

template< long x, long y, bool (*r)(failed, failed) >

typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type

assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) );

#   else

template< assert_::relations r, long x, long y >

typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type

assert_rel_arg( assert_relation<r,x,y> );

#   endif



#endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER



#undef AUX778076_ASSERT_ARG



BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE





// BOOST_MPL_ASSERT((pred<x,...>))



#define BOOST_MPL_ASSERT(pred) \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \

          boost::mpl::assertion_failed<false>( \

              boost::mpl::assert_arg( (void (*) pred)0, 1 ) \

            ) \

        ) \

    ) \

/**/



// BOOST_MPL_ASSERT_NOT((pred<x,...>))



#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)

#   define BOOST_MPL_ASSERT_NOT(pred) \

enum { \

      BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \

          boost::mpl::assertion<false>::failed( \

              boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \

            ) \

        ) \

}\

/**/

#else

#   define BOOST_MPL_ASSERT_NOT(pred) \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \

          boost::mpl::assertion_failed<false>( \

              boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \

            ) \

        ) \

   ) \

/**/

#endif



// BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y)



#if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)



#   if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)

// agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518

#   define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y)      \

enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \

        boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \

            (boost::mpl::failed ************ ( boost::mpl::assert_relation< \

                  boost::mpl::assert_::relations( sizeof( \

                      boost::mpl::assert_::arg rel boost::mpl::assert_::arg \

                    ) ) \

                , x \

                , y \

                >::************)) 0 ) \

        ) \

    ) \

/**/

#   else

#   define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y)    \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \

          boost::mpl::assert_::arg rel boost::mpl::assert_::arg \

        ) \

    ); \

BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \

        boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \

              boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \

                  boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \

                , x \

                , y \

                >() ) \

            ) \

        ) \

    ) \

/**/

#   endif



#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \

BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \

/**/



#else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES



#   if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)

#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \

        boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \

              boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \

            ) ) \

        ) \

    ) \

/**/

#   else

#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \

        boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \

            boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \

        ) \

    ) \

/**/

#   endif



#endif





// BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) ) 



#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202))

#   define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \

struct msg; \

typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \

{ \

    using boost::mpl::assert_::types; \

    static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \

    { return 0; } \

} BOOST_PP_CAT(mpl_assert_arg,counter); \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \

        boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \

        ) \

    ) \

/**/

#else

#   define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ )  \

struct msg; \

typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \

{ \

    static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \

    { return 0; } \

} BOOST_PP_CAT(mpl_assert_arg,counter); \

BOOST_MPL_AUX_ASSERT_CONSTANT( \

      std::size_t \

    , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \

        boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \

        ) \

    ) \

/**/

#endif



#define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \

BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \

/**/



#endif // BOOST_MPL_ASSERT_HPP_INCLUDED

