mirror of
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440 lines
14 KiB
C++
440 lines
14 KiB
C++
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#ifndef BOOST_MPL_ASSERT_HPP_INCLUDED
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#define BOOST_MPL_ASSERT_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2006
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/not.hpp>
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#include <boost/mpl/aux_/value_wknd.hpp>
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#include <boost/mpl/aux_/nested_type_wknd.hpp>
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#include <boost/mpl/aux_/yes_no.hpp>
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#include <boost/mpl/aux_/na.hpp>
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#include <boost/mpl/aux_/adl_barrier.hpp>
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#include <boost/mpl/aux_/config/nttp.hpp>
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#include <boost/mpl/aux_/config/dtp.hpp>
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#include <boost/mpl/aux_/config/gcc.hpp>
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#include <boost/mpl/aux_/config/msvc.hpp>
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#include <boost/mpl/aux_/config/gpu.hpp>
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#include <boost/mpl/aux_/config/static_constant.hpp>
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#include <boost/mpl/aux_/config/pp_counter.hpp>
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#include <boost/mpl/aux_/config/workaround.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/config.hpp> // make sure 'size_t' is placed into 'std'
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#include <cstddef>
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1700)
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#include <boost/mpl/if.hpp>
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#endif
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \
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|| (BOOST_MPL_CFG_GCC != 0) \
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|| BOOST_WORKAROUND(__IBMCPP__, <= 600)
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# define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
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#endif
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#if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \
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|| BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \
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|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \
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|| BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840))
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# define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
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#endif
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// agurt, 10/nov/06: use enums for Borland (which cannot cope with static constants)
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// and GCC (which issues "unused variable" warnings when static constants are used
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// at a function scope)
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \
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|| (BOOST_MPL_CFG_GCC != 0) || (BOOST_MPL_CFG_GPU != 0)
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# define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) enum { expr }
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#else
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# define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) BOOST_STATIC_CONSTANT(T, expr)
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#endif
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
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struct failed {};
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// agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept
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// 'assert<false>' by reference; can't apply it unconditionally -- apparently it
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// degrades the quality of GCC diagnostics
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
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# define AUX778076_ASSERT_ARG(x) x&
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#else
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# define AUX778076_ASSERT_ARG(x) x
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#endif
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template< bool C > struct assert { typedef void* type; };
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template<> struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; };
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template< bool C >
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int assertion_failed( typename assert<C>::type );
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template< bool C >
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struct assertion
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{
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static int failed( assert<false> );
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};
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template<>
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struct assertion<true>
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{
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static int failed( void* );
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};
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struct assert_
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{
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#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
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template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {};
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#endif
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static assert_ const arg;
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enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal };
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};
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#if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
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bool operator==( failed, failed );
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bool operator!=( failed, failed );
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bool operator>( failed, failed );
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bool operator>=( failed, failed );
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bool operator<( failed, failed );
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bool operator<=( failed, failed );
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#if defined(__EDG_VERSION__)
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template< bool (*)(failed, failed), long x, long y > struct assert_relation {};
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# define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y>
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#else
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template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) >
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struct assert_relation {};
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# define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r>
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#endif
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#else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
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boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ );
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boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ );
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boost::mpl::aux::weighted_tag<3>::type operator>( assert_, assert_ );
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boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ );
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boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ );
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boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ );
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template< assert_::relations r, long x, long y > struct assert_relation {};
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#endif
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1700)
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template<class Pred>
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struct extract_assert_pred;
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template<class Pred>
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struct extract_assert_pred<void(Pred)> { typedef Pred type; };
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template<class Pred>
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struct eval_assert {
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typedef typename extract_assert_pred<Pred>::type P;
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typedef typename P::type p_type;
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typedef typename ::boost::mpl::if_c<p_type::value,
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AUX778076_ASSERT_ARG(assert<false>),
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failed ************ P::************
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>::type type;
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};
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template<class Pred>
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struct eval_assert_not {
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typedef typename extract_assert_pred<Pred>::type P;
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typedef typename P::type p_type;
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typedef typename ::boost::mpl::if_c<!p_type::value,
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AUX778076_ASSERT_ARG(assert<false>),
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failed ************ ::boost::mpl::not_<P>::************
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>::type type;
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};
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template< typename T >
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T make_assert_arg();
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#elif !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
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template< bool > struct assert_arg_pred_impl { typedef int type; };
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template<> struct assert_arg_pred_impl<true> { typedef void* type; };
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template< typename P > struct assert_arg_pred
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{
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typedef typename P::type p_type;
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typedef typename assert_arg_pred_impl< p_type::value >::type type;
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};
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template< typename P > struct assert_arg_pred_not
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{
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typedef typename P::type p_type;
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BOOST_MPL_AUX_ASSERT_CONSTANT( bool, p = !p_type::value );
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typedef typename assert_arg_pred_impl<p>::type type;
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};
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template< typename Pred >
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failed ************ (Pred::************
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assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type )
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);
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template< typename Pred >
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failed ************ (boost::mpl::not_<Pred>::************
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assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type )
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);
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template< typename Pred >
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AUX778076_ASSERT_ARG(assert<false>)
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assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type );
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template< typename Pred >
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AUX778076_ASSERT_ARG(assert<false>)
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assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type );
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#else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
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template< bool c, typename Pred > struct assert_arg_type_impl
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{
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typedef failed ************ Pred::* mwcw83_wknd;
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typedef mwcw83_wknd ************* type;
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};
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template< typename Pred > struct assert_arg_type_impl<true,Pred>
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{
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typedef AUX778076_ASSERT_ARG(assert<false>) type;
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};
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template< typename Pred > struct assert_arg_type
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: assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred >
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{
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};
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template< typename Pred >
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typename assert_arg_type<Pred>::type
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assert_arg(void (*)(Pred), int);
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template< typename Pred >
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typename assert_arg_type< boost::mpl::not_<Pred> >::type
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assert_not_arg(void (*)(Pred), int);
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# if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
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template< long x, long y, bool (*r)(failed, failed) >
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typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type
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assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) );
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# else
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template< assert_::relations r, long x, long y >
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typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type
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assert_rel_arg( assert_relation<r,x,y> );
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# endif
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#endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
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#undef AUX778076_ASSERT_ARG
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
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#if BOOST_WORKAROUND(BOOST_MSVC, == 1700)
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// BOOST_MPL_ASSERT((pred<x,...>))
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#define BOOST_MPL_ASSERT(pred) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<false>( \
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boost::mpl::make_assert_arg< \
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typename boost::mpl::eval_assert<void pred>::type \
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>() \
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) \
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) \
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) \
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/**/
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// BOOST_MPL_ASSERT_NOT((pred<x,...>))
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#define BOOST_MPL_ASSERT_NOT(pred) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<false>( \
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boost::mpl::make_assert_arg< \
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typename boost::mpl::eval_assert_not<void pred>::type \
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>() \
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) \
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) \
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) \
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/**/
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#else
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// BOOST_MPL_ASSERT((pred<x,...>))
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#define BOOST_MPL_ASSERT(pred) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<false>( \
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boost::mpl::assert_arg( (void (*) pred)0, 1 ) \
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) \
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) \
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) \
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/**/
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// BOOST_MPL_ASSERT_NOT((pred<x,...>))
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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# define BOOST_MPL_ASSERT_NOT(pred) \
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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion<false>::failed( \
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boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \
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) \
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) \
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}\
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/**/
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#else
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# define BOOST_MPL_ASSERT_NOT(pred) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<false>( \
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boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \
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) \
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) \
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) \
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/**/
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#endif
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#endif
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// BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y)
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#if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
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# if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
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// agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518
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# define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \
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enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \
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boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \
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(boost::mpl::failed ************ ( boost::mpl::assert_relation< \
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boost::mpl::assert_::relations( sizeof( \
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boost::mpl::assert_::arg rel boost::mpl::assert_::arg \
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) ) \
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, x \
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, y \
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>::************)) 0 ) \
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) \
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) \
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/**/
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# else
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# define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \
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boost::mpl::assert_::arg rel boost::mpl::assert_::arg \
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) \
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); \
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BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \
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boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \
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boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \
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boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \
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, x \
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, y \
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>() ) \
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) \
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) \
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) \
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/**/
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# endif
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# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
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BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \
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/**/
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#else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
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# if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
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# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \
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boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \
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) ) \
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) \
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) \
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/**/
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# else
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# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \
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boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \
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boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \
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) \
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) \
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/**/
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# endif
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#endif
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// BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) )
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#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202))
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# define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \
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struct msg; \
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typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \
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{ \
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using boost::mpl::assert_::types; \
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static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \
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{ return 0; } \
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} BOOST_PP_CAT(mpl_assert_arg,counter); \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \
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boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \
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) \
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) \
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/**/
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#else
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# define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \
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struct msg; \
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typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \
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{ \
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static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \
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{ return 0; } \
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} BOOST_PP_CAT(mpl_assert_arg,counter); \
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BOOST_MPL_AUX_ASSERT_CONSTANT( \
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std::size_t \
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, BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \
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boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \
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) \
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) \
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/**/
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#endif
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#define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \
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BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \
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/**/
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#endif // BOOST_MPL_ASSERT_HPP_INCLUDED
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