mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_CONTAINER_EMPTY_HPP
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#define SPROUT_CONTAINER_EMPTY_HPP
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#include <sprout/config.hpp>
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#include <sprout/workaround/std/cstddef.hpp>
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#include <sprout/container/traits_fwd.hpp>
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#include <sprout/container/container_traits.hpp>
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#include <sprout/adl/not_found.hpp>
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namespace sprout_adl {
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sprout::not_found_via_adl range_empty(...);
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} // namespace sprout_adl
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namespace sprout {
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namespace container_detail {
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template<typename Container>
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inline SPROUT_CONSTEXPR bool
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range_empty(Container const& cont) {
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return sprout::container_range_traits<Container>::range_empty(cont);
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}
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} // namespace container_detail
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//
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// empty
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//
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// effect:
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// ADL callable range_empty(cont) -> range_empty(cont)
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// otherwise -> sprout::container_range_traits<Container>::range_empty(cont)
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// [default]
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// callable cont.empty() -> cont.empty()
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// otherwise -> size(cont) == 0
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//
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template<typename Container>
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inline SPROUT_CONSTEXPR bool
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empty(Container const& cont) {
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using sprout::container_detail::range_empty;
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using sprout_adl::range_empty;
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return range_empty(cont);
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}
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template<typename T, std::size_t N>
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inline SPROUT_CONSTEXPR bool
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empty(T const (& arr)[N]) {
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return sprout::container_detail::range_empty(arr);
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}
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} // namespace sprout
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#include <sprout/container/container_range_traits.hpp>
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#endif // #ifndef SPROUT_CONTAINER_EMPTY_HPP
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