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/*!
@file
Defines operators for Searchables.
@copyright Louis Dionne 2013-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_DETAIL_OPERATORS_SEARCHABLE_HPP
#define BOOST_HANA_DETAIL_OPERATORS_SEARCHABLE_HPP
#include <boost/hana/config.hpp>
#include <boost/hana/fwd/at_key.hpp>
BOOST_HANA_NAMESPACE_BEGIN namespace detail {
template <typename Derived>
struct searchable_operators {
template <typename Key>
constexpr decltype(auto) operator[](Key&& key) & {
return hana::at_key(static_cast<Derived&>(*this),
static_cast<Key&&>(key));
}
template <typename Key>
constexpr decltype(auto) operator[](Key&& key) && {
return hana::at_key(static_cast<Derived&&>(*this),
static_cast<Key&&>(key));
}
template <typename Key>
constexpr decltype(auto) operator[](Key&& key) const& {
return hana::at_key(static_cast<Derived const&>(*this),
static_cast<Key&&>(key));
}
};
} BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_DETAIL_OPERATORS_SEARCHABLE_HPP
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