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149 lines
3.0 KiB
C++
149 lines
3.0 KiB
C++
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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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// Preprocessed version of "boost/mpl/minus.hpp" header
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// -- DO NOT modify by hand!
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namespace boost { namespace mpl {
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template<
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typename Tag1
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, typename Tag2
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, BOOST_MPL_AUX_NTTP_DECL(int, tag1_) = BOOST_MPL_AUX_MSVC_VALUE_WKND(Tag1)::value
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, BOOST_MPL_AUX_NTTP_DECL(int, tag2_) = BOOST_MPL_AUX_MSVC_VALUE_WKND(Tag2)::value
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>
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struct minus_impl
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: if_c<
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( tag1_ > tag2_ )
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, aux::cast2nd_impl< minus_impl< Tag1,Tag1 >,Tag1, Tag2 >
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, aux::cast1st_impl< minus_impl< Tag2,Tag2 >,Tag1, Tag2 >
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>::type
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{
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};
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/// for Digital Mars C++/compilers with no CTPS/TTP support
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template<> struct minus_impl< na,na >
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{
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template< typename U1, typename U2 > struct apply
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{
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typedef apply type;
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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};
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template<> struct minus_impl< na,integral_c_tag >
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{
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template< typename U1, typename U2 > struct apply
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{
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typedef apply type;
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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};
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template<> struct minus_impl< integral_c_tag,na >
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{
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template< typename U1, typename U2 > struct apply
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{
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typedef apply type;
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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};
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template< typename T > struct minus_tag
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{
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typedef typename T::tag type;
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};
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/// forward declaration
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template<
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typename BOOST_MPL_AUX_NA_PARAM(N1)
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, typename BOOST_MPL_AUX_NA_PARAM(N2)
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>
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struct minus2;
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template<
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typename BOOST_MPL_AUX_NA_PARAM(N1)
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, typename BOOST_MPL_AUX_NA_PARAM(N2)
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, typename N3 = na, typename N4 = na, typename N5 = na
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>
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struct minus
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: if_<
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is_na<N3>
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, minus2< N1,N2 >
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, minus<
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minus2< N1,N2 >
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, N3, N4, N5
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>
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>::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(
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5
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, minus
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, ( N1, N2, N3, N4, N5 )
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)
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};
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template<
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typename N1
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, typename N2
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>
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struct minus2
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: aux::msvc_eti_base< typename apply_wrap2<
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minus_impl<
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typename minus_tag<N1>::type
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, typename minus_tag<N2>::type
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>
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, N1
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, N2
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>::type >::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(2, minus2, (N1, N2))
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};
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BOOST_MPL_AUX_NA_SPEC2(2, 5, minus)
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}}
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namespace boost { namespace mpl {
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namespace aux {
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template< typename T, T n1, T n2 >
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struct minus_wknd
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{
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BOOST_STATIC_CONSTANT(T, value = (n1 - n2));
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typedef integral_c< T,value > type;
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};
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}
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template<>
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struct minus_impl< integral_c_tag,integral_c_tag >
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{
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template< typename N1, typename N2 > struct apply
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: aux::minus_wknd<
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typename aux::largest_int<
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typename N1::value_type
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, typename N2::value_type
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>::type
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, N1::value
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, N2::value
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>::type
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{
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};
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};
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}}
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