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Diffstat (limited to '3rdParty/Boost/src/boost/ratio/detail/mpl/sign.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/ratio/detail/mpl/sign.hpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/ratio/detail/mpl/sign.hpp b/3rdParty/Boost/src/boost/ratio/detail/mpl/sign.hpp new file mode 100644 index 0000000..af201eb --- /dev/null +++ b/3rdParty/Boost/src/boost/ratio/detail/mpl/sign.hpp @@ -0,0 +1,89 @@ +//////////////////////////////////////////////////////////////////// +// +// Copyright Vicente J. Botet Escriba 2010 +// +// Distributed under 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 http://www.boost.org/libs/mpl for documentation. +// +//////////////////////////////////////////////////////////////////// +#ifndef BOOST_MPL_SIGN_HPP_INCLUDED +#define BOOST_MPL_SIGN_HPP_INCLUDED + +#include <boost/mpl/integral_c.hpp> +#include <boost/mpl/aux_/na_spec.hpp> +#include <boost/mpl/aux_/lambda_support.hpp> +#include <boost/mpl/aux_/config/eti.hpp> +#include <boost/mpl/aux_/config/integral.hpp> +#include <boost/mpl/aux_/config/static_constant.hpp> + +#if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC_2) \ + && !defined(BOOST_MPL_PREPROCESSING_MODE) \ + && ( defined(BOOST_MSVC) \ + || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \ + ) + +# define BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC_2 + +#endif + +namespace boost { namespace mpl { + +template< typename Tag > struct sign_impl; + +template< typename T > struct sign_tag +{ + typedef typename T::tag type; +}; + +template< + typename BOOST_MPL_AUX_NA_PARAM(N) + > +struct sign + : sign_impl< + typename sign_tag<N>::type + >::template apply<N>::type +{ + BOOST_MPL_AUX_LAMBDA_SUPPORT(1, sign, (N)) +}; + +BOOST_MPL_AUX_NA_SPEC(1, sign) + +template< + typename T + , T n1 + > +struct sign_c + : sign<integral_c<T,n1> > +{ +}; + +#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC_2) +namespace aux { +template< typename T, T n > struct sign_wknd +{ + BOOST_STATIC_CONSTANT(T, value = (n == 0 ? 0 : (n < 0 ? -1 : 1))); + typedef integral_c<T,value> type; +}; +} +#endif + +template<> +struct sign_impl<integral_c_tag> +{ +#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC_2) + template< typename N > struct apply + : aux::sign_wknd< typename N::value_type, N::value > +#else + template< typename N > struct apply + : integral_c< typename N::value_type, (N::value == 0 ? 0 : (N::value < 0 ? -1 : 1)) > +#endif + { + }; +}; + +}} + +#endif // BOOST_MPL_SIGN_HPP_INCLUDED |