40 lines
953 B
C++
40 lines
953 B
C++
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// Copyright 2017 Peter Dimov.
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#ifndef BOOST_HASH_IS_UNORDERED_RANGE_HPP_INCLUDED
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#define BOOST_HASH_IS_UNORDERED_RANGE_HPP_INCLUDED
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#include <boost/container_hash/is_range.hpp>
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#include <boost/type_traits/integral_constant.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost
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{
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namespace hash_detail
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{
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template<class T, class E = true_type> struct has_hasher_: false_type
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{
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};
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template<class T> struct has_hasher_< T, integral_constant< bool,
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is_same<typename T::hasher, typename T::hasher>::value
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> >: true_type
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{
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};
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} // namespace hash_detail
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namespace container_hash
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{
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template<class T> struct is_unordered_range: integral_constant< bool, is_range<T>::value && hash_detail::has_hasher_<T>::value >
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{
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};
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} // namespace container_hash
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} // namespace boost
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#endif // #ifndef BOOST_HASH_IS_UNORDERED_RANGE_HPP_INCLUDED
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