ceph/src/boost/boost/math/special_functions/detail/iconv.hpp

   1 //  Copyright (c) 2009 John Maddock
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_MATH_ICONV_HPP
   7 #define BOOST_MATH_ICONV_HPP
   8
   9 #ifdef _MSC_VER
  10 #pragma once
  11 #endif
  12
  13 #include <boost/math/special_functions/round.hpp>
  14 #include <boost/type_traits/is_convertible.hpp>
  15
  16 namespace boost { namespace math { namespace detail{
  17
  18 template <class T, class Policy>
  19 inline int iconv_imp(T v, Policy const&, mpl::true_ const&)
  20 {
  21    return static_cast<int>(v);
  22 }
  23
  24 template <class T, class Policy>
  25 inline int iconv_imp(T v, Policy const& pol, mpl::false_ const&)
  26 {
  27    BOOST_MATH_STD_USING
  28    return iround(v, pol);
  29 }
  30
  31 template <class T, class Policy>
  32 inline int iconv(T v, Policy const& pol)
  33 {
  34    typedef typename boost::is_convertible<T, int>::type tag_type;
  35    return iconv_imp(v, pol, tag_type());
  36 }
  37
  38
  39 }}} // namespaces
  40
  41 #endif // BOOST_MATH_ICONV_HPP
  42