boost/multiprecision/traits/is_restricted_conversion.hpp
///////////////////////////////////////////////////////////////////////////////
// Copyright Vicente J. Botet Escriba 2009-2011
// Copyright 2012 John Maddock. 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)
#ifndef BOOST_MP_RESTRICTED_CONVERSION_HPP
#define BOOST_MP_RESTRICTED_CONVERSION_HPP
#include <boost/multiprecision/traits/explicit_conversion.hpp>
#include <boost/mpl/if.hpp>
#include <boost/multiprecision/detail/number_base.hpp>
namespace boost { namespace multiprecision { namespace detail {
template <class From, class To>
struct is_lossy_conversion
{
typedef typename mpl::if_c<
((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_integer))
/* || ((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_rational))*/
|| ((number_category<From>::value == number_kind_rational) && (number_category<To>::value == number_kind_integer)) || ((number_category<From>::value == number_kind_fixed_point) && (number_category<To>::value == number_kind_integer)) || (number_category<From>::value == number_kind_unknown) || (number_category<To>::value == number_kind_unknown),
mpl::true_,
mpl::false_>::type type;
static const bool value = type::value;
};
template <typename From, typename To>
struct is_restricted_conversion
{
typedef typename mpl::if_c<
((is_explicitly_convertible<From, To>::value && !is_convertible<From, To>::value) || is_lossy_conversion<From, To>::value),
mpl::true_,
mpl::false_>::type type;
static const bool value = type::value;
};
}}} // namespace boost::multiprecision::detail
#endif // BOOST_MP_RESTRICTED_CONVERSION_HPP