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Diffstat (limited to 'boost/hana/none_of.hpp')
-rw-r--r-- | boost/hana/none_of.hpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/boost/hana/none_of.hpp b/boost/hana/none_of.hpp new file mode 100644 index 0000000000..2c1fbec1d0 --- /dev/null +++ b/boost/hana/none_of.hpp @@ -0,0 +1,50 @@ +/*! +@file +Defines `boost::hana::none_of`. + +@copyright Louis Dionne 2013-2016 +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_NONE_OF_HPP +#define BOOST_HANA_NONE_OF_HPP + +#include <boost/hana/fwd/none_of.hpp> + +#include <boost/hana/any_of.hpp> +#include <boost/hana/concept/searchable.hpp> +#include <boost/hana/config.hpp> +#include <boost/hana/core/dispatch.hpp> +#include <boost/hana/not.hpp> + + +BOOST_HANA_NAMESPACE_BEGIN + //! @cond + template <typename Xs, typename Pred> + constexpr auto none_of_t::operator()(Xs&& xs, Pred&& pred) const { + using S = typename hana::tag_of<Xs>::type; + using NoneOf = BOOST_HANA_DISPATCH_IF(none_of_impl<S>, + hana::Searchable<S>::value + ); + + #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS + static_assert(hana::Searchable<S>::value, + "hana::none_of(xs, pred) requires 'xs' to be a Searchable"); + #endif + + return NoneOf::apply(static_cast<Xs&&>(xs), static_cast<Pred&&>(pred)); + } + //! @endcond + + template <typename S, bool condition> + struct none_of_impl<S, when<condition>> : default_ { + template <typename Xs, typename Pred> + static constexpr auto apply(Xs&& xs, Pred&& pred) { + return hana::not_(hana::any_of(static_cast<Xs&&>(xs), + static_cast<Pred&&>(pred))); + } + }; +BOOST_HANA_NAMESPACE_END + +#endif // !BOOST_HANA_NONE_OF_HPP |