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| author | Remko Tronçon <git@el-tramo.be> | 2009-06-01 08:48:42 (GMT) |
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| committer | Remko Tronçon <git@el-tramo.be> | 2009-06-01 09:24:28 (GMT) |
| commit | 2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch) | |
| tree | d46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp | |
| download | swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2 | |
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Diffstat (limited to '3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp')
| -rw-r--r-- | 3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp b/3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp new file mode 100644 index 0000000..246a1b4 --- /dev/null +++ b/3rdParty/Boost/boost/numeric/conversion/detail/meta.hpp @@ -0,0 +1,120 @@ +// (c) Copyright Fernando Luis Cacciola Carballal 2000-2004 +// Use, modification, and distribution is subject to 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 library home page at http://www.boost.org/libs/numeric/conversion +// +// Contact the author at: fernando_cacciola@hotmail.com +// +#ifndef BOOST_NUMERIC_CONVERSION_DETAIL_META_FLC_12NOV2002_HPP +#define BOOST_NUMERIC_CONVERSION_DETAIL_META_FLC_12NOV2002_HPP + +#include "boost/type_traits/remove_cv.hpp" + +#include "boost/mpl/if.hpp" +#include "boost/mpl/eval_if.hpp" +#include "boost/mpl/equal_to.hpp" +#include "boost/mpl/not.hpp" +#include "boost/mpl/and.hpp" +#include "boost/mpl/bool.hpp" +#include "boost/mpl/identity.hpp" + +namespace boost { namespace numeric { namespace convdetail +{ + template< class T1, class T2> + struct equal_to + { + #if !defined(__BORLANDC__) + + enum { x = ( BOOST_MPL_AUX_VALUE_WKND(T1)::value == BOOST_MPL_AUX_VALUE_WKND(T2)::value ) }; + + BOOST_STATIC_CONSTANT(bool, value = x); + + typedef mpl::bool_<value> type; + + #else + + BOOST_STATIC_CONSTANT(bool, value = ( + BOOST_MPL_AUX_VALUE_WKND(T1)::value + == BOOST_MPL_AUX_VALUE_WKND(T2)::value + )); + + typedef mpl::bool_<( + BOOST_MPL_AUX_VALUE_WKND(T1)::value + == BOOST_MPL_AUX_VALUE_WKND(T2)::value + )> type; + #endif + }; + +// Metafunction: + // + // ct_switch4<Value,Case0Val,Case1Val,Case2Val,Case0Type,Case1Type,Case2Type,DefaultType>::type + // + // {Value,Case(X)Val} are Integral Constants (such as: mpl::int_<>) + // {Case(X)Type,DefaultType} are arbitrary types. (not metafunctions) + // + // Returns Case(X)Type if Val==Case(X)Val; DefaultType otherwise. + // + template<class Value, + class Case0Val, + class Case1Val, + class Case2Val, + class Case0Type, + class Case1Type, + class Case2Type, + class DefaultType + > + struct ct_switch4 + { + typedef mpl::identity<Case0Type> Case0TypeQ ; + typedef mpl::identity<Case1Type> Case1TypeQ ; + + typedef equal_to<Value,Case0Val> is_case0 ; + typedef equal_to<Value,Case1Val> is_case1 ; + typedef equal_to<Value,Case2Val> is_case2 ; + + typedef mpl::if_<is_case2,Case2Type,DefaultType> choose_2_3Q ; + typedef mpl::eval_if<is_case1,Case1TypeQ,choose_2_3Q> choose_1_2_3Q ; + + typedef typename + mpl::eval_if<is_case0,Case0TypeQ,choose_1_2_3Q>::type + type ; + } ; + + + + + // Metafunction: + // + // for_both<expr0,expr1,TT,TF,FT,FF>::type + // + // {exp0,expr1} are Boolean Integral Constants + // {TT,TF,FT,FF} are aribtrary types. (not metafunctions) + // + // According to the combined boolean value of 'expr0 && expr1', selects the corresponding type. + // + template<class expr0, class expr1, class TT, class TF, class FT, class FF> + struct for_both + { + typedef mpl::identity<TF> TF_Q ; + typedef mpl::identity<TT> TT_Q ; + + typedef typename mpl::not_<expr0>::type not_expr0 ; + typedef typename mpl::not_<expr1>::type not_expr1 ; + + typedef typename mpl::and_<expr0,expr1>::type caseTT ; + typedef typename mpl::and_<expr0,not_expr1>::type caseTF ; + typedef typename mpl::and_<not_expr0,expr1>::type caseFT ; + + typedef mpl::if_<caseFT,FT,FF> choose_FT_FF_Q ; + typedef mpl::eval_if<caseTF,TF_Q,choose_FT_FF_Q> choose_TF_FT_FF_Q ; + + typedef typename mpl::eval_if<caseTT,TT_Q,choose_TF_FT_FF_Q>::type type ; + } ; + +} } } // namespace boost::numeric::convdetail + +#endif + + |