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https://github.com/bolero-MURAKAMI/Sprout.git
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67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
#ifndef SPROUT_INDEX_TUPLE_UDL_HPP
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#define SPROUT_INDEX_TUPLE_UDL_HPP
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#include <sprout/config.hpp>
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#include <sprout/index_tuple/index_tuple.hpp>
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#if SPROUT_USE_USER_DEFINED_LITERALS
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#include <type_traits>
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#include <sprout/index_tuple/make_index_tuple.hpp>
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namespace sprout {
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namespace detail {
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template<typename IntType, char... Chars>
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struct digits_to_int;
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template<typename IntType, char C>
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struct digits_to_int<IntType, C>
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: public std::integral_constant<IntType, IntType(C - 48)>
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{};
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template<typename IntType, char Head, char... Tail>
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struct digits_to_int<IntType, Head, Tail...>
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: public std::integral_constant<IntType, 10 * IntType(Head - 48) + sprout::detail::digits_to_int<IntType, Tail...>::value>
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{};
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} // namespace detail
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//
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// indexes_result
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//
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template<char... Chars>
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struct indexes_result
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: public sprout::make_index_tuple<sprout::detail::digits_to_int<sprout::index_t, Chars...>::value>
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{};
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//
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// uindexes_result
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//
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template<char... Chars>
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struct uindexes_result
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: public sprout::make_uindex_tuple<sprout::detail::digits_to_int<sprout::uindex_t, Chars...>::value>
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{};
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namespace udl {
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//
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// _indexes
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//
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template<char... Chars>
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SPROUT_CONSTEXPR typename sprout::indexes_result<Chars...>::type
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operator "" _indexes() {
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return sprout::indexes_result<Chars...>::make();
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}
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//
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// _uindexes
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//
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template<char... Chars>
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SPROUT_CONSTEXPR typename sprout::uindexes_result<Chars...>::type
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operator "" _uindexes() {
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return sprout::uindexes_result<Chars...>::make();
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}
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} // namespace udl
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using sprout::udl::operator "" _indexes;
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using sprout::udl::operator "" _uindexes;
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} // namespace sprout
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#endif // #if SPROUT_USE_USER_DEFINED_LITERALS
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#endif // #ifndef SPROUT_INDEX_TUPLE_UDL_HPP
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