mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2019 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_UTILITY_SWALLOW_HPP
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#define SPROUT_UTILITY_SWALLOW_HPP
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#include <initializer_list>
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#include <sprout/config.hpp>
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namespace sprout {
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//
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// swallow_t
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// swallow
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//
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// example:
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// swallow({(void)pack, 0}...);
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//
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struct swallow_t {
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public:
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template<typename T>
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inline SPROUT_CXX14_CONSTEXPR void
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operator()(std::initializer_list<T>) const SPROUT_NOEXCEPT {}
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};
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::swallow_t swallow = {};
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} // anonymous-namespace
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// template<typename T>
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// inline SPROUT_CONSTEXPR sprout::swallow_t
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// operator,(sprout::swallow_t, T&&) SPROUT_NOEXCEPT {
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// return sprout::swallow;
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// }
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// template<typename T>
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// inline SPROUT_CONSTEXPR sprout::swallow_t
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// operator,(T&&, sprout::swallow_t) SPROUT_NOEXCEPT {
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// return sprout::swallow;
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// }
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//
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// unused_t
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// unused
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//
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struct unused_t {
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public:
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template<typename... Args>
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SPROUT_CONSTEXPR sprout::unused_t const&
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operator()(Args&&...) const SPROUT_NOEXCEPT {
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return *this;
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}
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};
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::unused_t unused = {};
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} // anonymous-namespace
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_SWALLOW_HPP
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