mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-09 02:26:06 -05:00
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
// (C) Copyright David Abrahams 2002.
|
|
// (C) Copyright Jeremy Siek 2002.
|
|
// (C) Copyright Thomas Witt 2002.
|
|
// 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_INTEROPERABLE_23022003THW_HPP
|
|
# define BOOST_INTEROPERABLE_23022003THW_HPP
|
|
|
|
# include <boost/mpl/bool.hpp>
|
|
# include <boost/mpl/or.hpp>
|
|
|
|
# include <boost/type_traits/is_convertible.hpp>
|
|
|
|
# include <boost/iterator/detail/config_def.hpp> // must appear last
|
|
|
|
namespace boost {
|
|
namespace iterators {
|
|
|
|
//
|
|
// Meta function that determines whether two
|
|
// iterator types are considered interoperable.
|
|
//
|
|
// Two iterator types A,B are considered interoperable if either
|
|
// A is convertible to B or vice versa.
|
|
// This interoperability definition is in sync with the
|
|
// standards requirements on constant/mutable container
|
|
// iterators (23.1 [lib.container.requirements]).
|
|
//
|
|
// For compilers that don't support is_convertible
|
|
// is_interoperable gives false positives. See comments
|
|
// on operator implementation for consequences.
|
|
//
|
|
template <typename A, typename B>
|
|
struct is_interoperable
|
|
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
|
|
: mpl::true_
|
|
# else
|
|
: mpl::or_<
|
|
is_convertible< A, B >
|
|
, is_convertible< B, A > >
|
|
# endif
|
|
{
|
|
};
|
|
|
|
} // namespace iterators
|
|
|
|
using iterators::is_interoperable;
|
|
|
|
} // namespace boost
|
|
|
|
# include <boost/iterator/detail/config_undef.hpp>
|
|
|
|
#endif // BOOST_INTEROPERABLE_23022003THW_HPP
|