ceph/src/boost/libs/numeric/conversion/include/boost/numeric/conversion/detail/bounds.hpp

   1 //  (c) Copyright Fernando Luis Cacciola Carballal 2000-2004
   2 //  Use, modification, and distribution is subject to the Boost Software
   3 //  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See library home page at http://www.boost.org/libs/numeric/conversion
   7 //
   8 // Contact the author at: fernando_cacciola@hotmail.com
   9 //
  10 #ifndef BOOST_NUMERIC_CONVERSION_BOUNDS_DETAIL_FLC_12NOV2002_HPP
  11 #define BOOST_NUMERIC_CONVERSION_BOUNDS_DETAIL_FLC_12NOV2002_HPP
  12
  13 #include "boost/limits.hpp"
  14 #include "boost/config.hpp"
  15 #include "boost/mpl/if.hpp"
  16
  17 namespace boost { namespace numeric { namespace boundsdetail
  18 {
  19   template<class N>
  20   class Integral
  21   {
  22       typedef std::numeric_limits<N> limits ;
  23
  24     public :
  25
  26       static N lowest  () { return limits::min BOOST_PREVENT_MACRO_SUBSTITUTION (); }
  27       static N highest () { return limits::max BOOST_PREVENT_MACRO_SUBSTITUTION (); }
  28       static N smallest() { return static_cast<N>(1); }
  29   } ;
  30
  31   template<class N>
  32   class Float
  33   {
  34       typedef std::numeric_limits<N> limits ;
  35
  36     public :
  37
  38       static N lowest  () { return static_cast<N>(-limits::max BOOST_PREVENT_MACRO_SUBSTITUTION ()) ; }
  39       static N highest () { return limits::max BOOST_PREVENT_MACRO_SUBSTITUTION (); }
  40       static N smallest() { return limits::min BOOST_PREVENT_MACRO_SUBSTITUTION (); }
  41   } ;
  42
  43   template<class N>
  44   struct get_impl
  45   {
  46     typedef mpl::bool_< ::std::numeric_limits<N>::is_integer > is_int ;
  47
  48     typedef Integral<N> impl_int   ;
  49     typedef Float   <N> impl_float ;
  50
  51     typedef typename mpl::if_<is_int,impl_int,impl_float>::type type ;
  52   } ;
  53
  54 } } } // namespace boost::numeric::boundsdetail.
  55
  56 #endif
  57 //
  58 ///////////////////////////////////////////////////////////////////////////////////////////////