Edit: /usr/include/boost/hana/contains.hpp (1560B)
/*!
@file
Defines `boost::hana::contains` and `boost::hana::in`.
@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_CONTAINS_HPP
#define BOOST_HANA_CONTAINS_HPP
#include
#include
#include
#include
#include
#include
BOOST_HANA_NAMESPACE_BEGIN
//! @cond
template
constexpr auto contains_t::operator()(Xs&& xs, Key&& key) const {
using S = typename hana::tag_of::type;
using Contains = BOOST_HANA_DISPATCH_IF(contains_impl,
hana::Searchable::value
);
#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
static_assert(hana::Searchable::value,
"hana::contains(xs, key) requires 'xs' to be a Searchable");
#endif
return Contains::apply(static_cast(xs),
static_cast(key));
}
//! @endcond
template
struct contains_impl> : default_ {
template
static constexpr auto apply(Xs&& xs, X&& x) {
return hana::any_of(static_cast(xs),
hana::equal.to(static_cast(x)));
}
};
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_CONTAINS_HPP