projects / ceph.git / blame
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| 7c673cae FG |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Copyright Vicente J. Botet Escriba 2009-2011 | |
| 3 | // Copyright 2012 John Maddock. Distributed under the Boost | |
| 4 | // Software License, Version 1.0. (See accompanying file | |
| 5 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | ||
| 7 | #ifndef BOOST_MP_RESTRICTED_CONVERSION_HPP | |
| 8 | #define BOOST_MP_RESTRICTED_CONVERSION_HPP | |
| 9 | ||
| 10 | #include <boost/multiprecision/traits/explicit_conversion.hpp> | |
| 11 | #include <boost/mpl/if.hpp> | |
| 12 | #include <boost/multiprecision/detail/number_base.hpp> | |
| 13 | ||
| 14 | namespace boost{ namespace multiprecision{ namespace detail{ | |
| 15 | ||
| 16 | ||
| 17 | template <class From, class To> | |
| 18 | struct is_lossy_conversion | |
| 19 | { | |
| 20 | typedef typename mpl::if_c< | |
| 21 | ((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_integer)) | |
| 22 | /* || ((number_category<From>::value == number_kind_floating_point) && (number_category<To>::value == number_kind_rational))*/ | |
| 23 | || ((number_category<From>::value == number_kind_rational) && (number_category<To>::value == number_kind_integer)) | |
| 24 | || ((number_category<From>::value == number_kind_fixed_point) && (number_category<To>::value == number_kind_integer)) | |
| 25 | || (number_category<From>::value == number_kind_unknown) | |
| 26 | || (number_category<To>::value == number_kind_unknown), | |
| 27 | mpl::true_, | |
| 28 | mpl::false_ | |
| 29 | >::type type; | |
| 30 | static const bool value = type::value; | |
| 31 | }; | |
| 32 | ||
| 33 | template<typename From, typename To> | |
| 34 | struct is_restricted_conversion | |
| 35 | { | |
| 36 | typedef typename mpl::if_c< | |
| 37 | ((is_explicitly_convertible<From, To>::value && !is_convertible<From, To>::value) | |
| 38 | || is_lossy_conversion<From, To>::value), | |
| 39 | mpl::true_, | |
| 40 | mpl::false_ | |
| 41 | >::type type; | |
| 42 | static const bool value = type::value; | |
| 43 | }; | |
| 44 | ||
| 45 | }}} // namespaces | |
| 46 | ||
| 47 | #endif // BOOST_MP_RESTRICTED_CONVERSION_HPP | |
| 48 |