mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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65 lines
2.1 KiB
C++
65 lines
2.1 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_FUNCTIONAL_BIND_LITERALS_HPP
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#define SPROUT_FUNCTIONAL_BIND_LITERALS_HPP
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#include <sprout/config.hpp>
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#include <sprout/functional/bind/placeholder.hpp>
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#include <sprout/detail/udl_namespace.hpp>
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#if SPROUT_USE_USER_DEFINED_LITERALS
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#include <sprout/type_traits/identity.hpp>
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#include <sprout/detail/digits_to_int.hpp>
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namespace sprout {
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//
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// placeholders_result
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// variadic_placeholders_result
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//
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template<char... Chars>
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struct placeholders_result
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: public sprout::identity<
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sprout::placeholder<sprout::detail::digits_to_int<int, Chars...>::value>
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>
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{};
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template<char... Chars>
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struct variadic_placeholders_result
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: public sprout::identity<
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sprout::placeholder<sprout::is_placeholder<decltype(sprout::placeholders::_va)>::value - sprout::detail::digits_to_int<int, Chars...>::value>
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>
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{};
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namespace literals {
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namespace placeholders {
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//
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// _
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// _tail
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//
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template<char... Chars>
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SPROUT_CONSTEXPR typename sprout::placeholders_result<Chars...>::type
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operator"" _() {
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typedef typename sprout::placeholders_result<Chars...>::type type;
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return type();
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}
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template<char... Chars>
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SPROUT_CONSTEXPR typename sprout::variadic_placeholders_result<Chars...>::type
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operator"" _tail() {
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typedef typename sprout::variadic_placeholders_result<Chars...>::type type;
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return type();
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}
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} // namespace placeholders
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using sprout::literals::placeholders::operator"" _;
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using sprout::literals::placeholders::operator"" _tail;
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} // namespace literals
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} // namespace sprout
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#endif // #if SPROUT_USE_USER_DEFINED_LITERALS
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#endif // #ifndef SPROUT_FUNCTIONAL_BIND_LITERALS_HPP
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