Edit: /usr/include/boost/hana/find.hpp (1732B)
/*!
@file
Defines `boost::hana::find`.
@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_FIND_HPP
#define BOOST_HANA_FIND_HPP
#include
#include
#include
#include
#include
#include
BOOST_HANA_NAMESPACE_BEGIN
//! @cond
template
constexpr auto find_t::operator()(Xs&& xs, Key const& key) const {
using S = typename hana::tag_of::type;
using Find = BOOST_HANA_DISPATCH_IF(find_impl,
hana::Searchable::value
);
#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
static_assert(hana::Searchable::value,
"hana::find(xs, key) requires 'xs' to be Searchable");
#endif
return Find::apply(static_cast(xs), key);
}
//! @endcond
namespace detail {
template
struct equal_to {
T const& t;
template
constexpr auto operator()(U const& u) const {
return hana::equal(t, u);
}
};
}
template
struct find_impl> : default_ {
template
static constexpr auto apply(Xs&& xs, Key const& key) {
return hana::find_if(static_cast(xs),
detail::equal_to{key});
}
};
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_FIND_HPP