1 /////////////////////////////////////////////////////////////////////////////// 2 // Copyright 2015 John Maddock. Distributed under the Boost 3 // Software License, Version 1.0. (See accompanying file 4 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5 6 #ifndef BOOST_IS_BYTE_CONTAINER_HPP 7 #define BOOST_IS_BYTE_CONTAINER_HPP 8 9 #include <iterator> 10 #include <boost/mpl/has_xxx.hpp> 11 #include <boost/type_traits/is_integral.hpp> 12 #include <boost/type_traits/remove_cv.hpp> 13 14 namespace boost { namespace multiprecision { namespace detail { 15 16 BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_member_const_iterator, const_iterator, false) 17 18 template <class C, bool b> 19 struct is_byte_container_imp 20 { 21 // Note: Don't use C::value_type as this is a rather widespread typedef, even for non-range types 22 typedef typename boost::remove_cv<typename std::iterator_traits<typename C::const_iterator>::value_type>::type container_value_type; 23 static const bool value = boost::is_integral<container_value_type>::value && (sizeof(container_value_type) == 1); 24 }; 25 26 template <class C> 27 struct is_byte_container_imp<C, false> : public boost::false_type 28 {}; 29 30 template <class C> 31 struct is_byte_container : public is_byte_container_imp<C, has_member_const_iterator<C>::value> 32 {}; 33 34 }}} // namespace boost::multiprecision::detail 35 36 #endif // BOOST_IS_BYTE_CONTAINER_HPP 37