49 lines
1.8 KiB
Plaintext
49 lines
1.8 KiB
Plaintext
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///////////////////////////////////////////////////////////////////////////////
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// Copyright Vicente J. Botet Escriba 2009-2011
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// Copyright 2012 John Maddock. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_MP_RESTRICTED_CONVERSION_HPP
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#define BOOST_MP_RESTRICTED_CONVERSION_HPP
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#include <boost/multiprecision/traits/explicit_conversion.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/multiprecision/detail/number_base.hpp>
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namespace boost{ namespace multiprecision{ namespace detail{
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template <class From, class To>
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struct is_lossy_conversion
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{
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typedef typename mpl::if_c<
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((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_integer))
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/* || ((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_rational))*/
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|| ((number_category<From>::value == number_kind_rational) && (number_category<To>::value == number_kind_integer))
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|| ((number_category<From>::value == number_kind_fixed_point) && (number_category<To>::value == number_kind_integer))
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|| (number_category<From>::value == number_kind_unknown)
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|| (number_category<To>::value == number_kind_unknown),
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mpl::true_,
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mpl::false_
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>::type type;
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static const bool value = type::value;
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};
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template<typename From, typename To>
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struct is_restricted_conversion
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{
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typedef typename mpl::if_c<
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((is_explicitly_convertible<From, To>::value && !is_convertible<From, To>::value)
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|| is_lossy_conversion<From, To>::value),
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mpl::true_,
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mpl::false_
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>::type type;
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static const bool value = type::value;
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};
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}}} // namespaces
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#endif // BOOST_MP_RESTRICTED_CONVERSION_HPP
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