forked from boostorg/mpl
277 lines
8.7 KiB
C++
277 lines
8.7 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 2000-2004
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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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// $Source$
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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/workaround.hpp>
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#include <boost/preprocessor/cat.hpp>
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#if BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
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|| (BOOST_MPL_CFG_GCC != 0)
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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(__BORLANDC__, < 0x600) \
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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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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
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template< bool C > struct assert { typedef void* type; };
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template<> struct assert<false> { typedef assert& type; };
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template< bool C >
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int assertion_failed( typename assert<C>::type );
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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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enum relations { arg, equal, 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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aux::weighted_tag<1>::type operator==(assert_::relations, assert_::relations);
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aux::weighted_tag<2>::type operator!=(assert_::relations, assert_::relations);
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aux::weighted_tag<3>::type operator>(assert_::relations, assert_::relations);
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aux::weighted_tag<4>::type operator>=(assert_::relations, assert_::relations);
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aux::weighted_tag<5>::type operator<(assert_::relations, assert_::relations);
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aux::weighted_tag<6>::type operator<=(assert_::relations, assert_::relations);
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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 !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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enum { 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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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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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 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
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
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// BOOST_MPL_ASSERT((pred<x,...>))
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#define BOOST_MPL_ASSERT(pred) \
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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = 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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#define BOOST_MPL_ASSERT_NOT(pred) \
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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = 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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// 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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# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
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enum { \
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BOOST_PP_CAT(mpl_assert_rel,__LINE__) = sizeof(boost::mpl::assert_::arg rel boost::mpl::assert_::arg) \
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, BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
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boost::mpl::assertion_failed<(x rel y)>( \
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(boost::mpl::failed ************ ( boost::mpl::assert_relation< \
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boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,__LINE__)) \
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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(x, rel, y) \
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enum { \
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BOOST_PP_CAT(mpl_assert_rel,__LINE__) = sizeof(boost::mpl::assert_::arg rel boost::mpl::assert_::arg) \
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, BOOST_PP_CAT(mpl_assert_rel_value,__LINE__) = (x rel y) \
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, BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
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boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,__LINE__)>( \
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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,__LINE__)) \
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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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#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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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = 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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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = 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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# define BOOST_MPL_ASSERT_MSG( c, msg, types ) \
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struct msg; \
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typedef struct BOOST_PP_CAT(msg,__LINE__) : 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,__LINE__); \
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enum { \
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BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
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boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,__LINE__)::assert_arg() ) \
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) \
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}\
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/**/
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#endif // BOOST_MPL_ASSERT_HPP_INCLUDED
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