blob: ff8f7f63cbe1f4b80c55cf16499f7f13c52863ba (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
///////////////////////////////////////////////////////////////////////////////
// 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;
};
}}} // namespaces
#endif // BOOST_MP_RESTRICTED_CONVERSION_HPP
|
