Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


// Copyright 2017 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.


#include <boost/container_hash/is_range.hpp>
#include <boost/type_traits/integral_constant.hpp>
#include <boost/type_traits/is_same.hpp>

namespace boost
namespace hash_detail

template<class T, class E = true_type> struct has_hasher_: false_type

template<class T> struct has_hasher_< T, integral_constant< bool,
        is_same<typename T::hasher, typename T::hasher>::value
    > >: true_type

} // namespace hash_detail

namespace container_hash

template<class T> struct is_unordered_range: integral_constant< bool, is_range<T>::value && hash_detail::has_hasher_<T>::value >

} // namespace container_hash
} // namespace boost