preprocessed/no_ctps/plus.hpp

0001
0002 // Copyright Aleksey Gurtovoy 2000-2004
0003 //
0004 // Distributed under the Boost Software License, Version 1.0.
0005 // (See accompanying file LICENSE_1_0.txt or copy at
0006 // http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008
0009 // Preprocessed version of "boost/mpl/plus.hpp" header
0010 // -- DO NOT modify by hand!
0011
0012 namespace boost { namespace mpl {
0013
0014 template<
0015       typename Tag1
0016     , typename Tag2
0017     >
0018 struct plus_impl
0019     : if_c<
0020           ( BOOST_MPL_AUX_NESTED_VALUE_WKND(int, Tag1)
0021               > BOOST_MPL_AUX_NESTED_VALUE_WKND(int, Tag2)
0022             )
0023
0024         , aux::cast2nd_impl< plus_impl< Tag1,Tag1 >,Tag1, Tag2 >
0025         , aux::cast1st_impl< plus_impl< Tag2,Tag2 >,Tag1, Tag2 >
0026         >::type
0027 {
0028 };
0029
0030 /// for Digital Mars C++/compilers with no CTPS/TTP support
0031 template<> struct plus_impl< na,na >
0032 {
0033     template< typename U1, typename U2 > struct apply
0034     {
0035         typedef apply type;
0036         BOOST_STATIC_CONSTANT(int, value  = 0);
0037     };
0038 };
0039
0040 template<> struct plus_impl< na,integral_c_tag >
0041 {
0042     template< typename U1, typename U2 > struct apply
0043     {
0044         typedef apply type;
0045         BOOST_STATIC_CONSTANT(int, value  = 0);
0046     };
0047 };
0048
0049 template<> struct plus_impl< integral_c_tag,na >
0050 {
0051     template< typename U1, typename U2 > struct apply
0052     {
0053         typedef apply type;
0054         BOOST_STATIC_CONSTANT(int, value  = 0);
0055     };
0056 };
0057
0058 template< typename T > struct plus_tag
0059 {
0060     typedef typename T::tag type;
0061 };
0062
0063 /// forward declaration
0064
0065 template<
0066       typename BOOST_MPL_AUX_NA_PARAM(N1)
0067     , typename BOOST_MPL_AUX_NA_PARAM(N2)
0068     >
0069 struct plus2;
0070
0071 template<
0072       typename BOOST_MPL_AUX_NA_PARAM(N1)
0073     , typename BOOST_MPL_AUX_NA_PARAM(N2)
0074     , typename N3 = na, typename N4 = na, typename N5 = na
0075     >
0076 struct plus
0077
0078     : if_<
0079
0080           is_na<N3>
0081         , plus2< N1,N2 >
0082         , plus<
0083               plus2< N1,N2 >
0084             , N3, N4, N5
0085             >
0086         >::type
0087
0088 {
0089     BOOST_MPL_AUX_LAMBDA_SUPPORT(
0090           5
0091         , plus
0092         , ( N1, N2, N3, N4, N5 )
0093         )
0094 };
0095
0096 template<
0097       typename N1
0098     , typename N2
0099     >
0100 struct plus2
0101     : plus_impl<
0102           typename plus_tag<N1>::type
0103         , typename plus_tag<N2>::type
0104         >::template apply< N1,N2 >::type
0105 {
0106     BOOST_MPL_AUX_LAMBDA_SUPPORT(2, plus2, (N1, N2))
0107
0108 };
0109
0110 BOOST_MPL_AUX_NA_SPEC2(2, 5, plus)
0111
0112 }}
0113
0114 namespace boost { namespace mpl {
0115 template<>
0116 struct plus_impl< integral_c_tag,integral_c_tag >
0117 {
0118     template< typename N1, typename N2 > struct apply
0119
0120         : integral_c<
0121               typename aux::largest_int<
0122                   typename N1::value_type
0123                 , typename N2::value_type
0124                 >::type
0125             , ( BOOST_MPL_AUX_VALUE_WKND(N1)::value
0126                   + BOOST_MPL_AUX_VALUE_WKND(N2)::value
0127                 )
0128             >
0129     {
0130     };
0131 };
0132
0133 }}