mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
#ifndef SPROUT_WEED_DETAIL_DIGITS_HPP
|
|
#define SPROUT_WEED_DETAIL_DIGITS_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/string.hpp>
|
|
#include <sprout/array.hpp>
|
|
#include <sprout/tuple/tuple.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/algorithm/find.hpp>
|
|
|
|
namespace sprout {
|
|
namespace weed {
|
|
namespace detail {
|
|
template<typename Elem>
|
|
struct digits;
|
|
|
|
template<>
|
|
struct digits<char> {
|
|
public:
|
|
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char, 10> table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string("0123456789"))
|
|
;
|
|
};
|
|
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char, 10> sprout::weed::detail::digits<char>::table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string("0123456789"))
|
|
;
|
|
|
|
template<>
|
|
struct digits<wchar_t> {
|
|
public:
|
|
SPROUT_STATIC_CONSTEXPR sprout::basic_string<wchar_t, 10> table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(L"0123456789"))
|
|
;
|
|
};
|
|
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<wchar_t, 10> sprout::weed::detail::digits<wchar_t>::table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(L"0123456789"))
|
|
;
|
|
|
|
#ifndef SPROUT_NO_UNICODE_LITERALS
|
|
template<>
|
|
struct digits<char16_t> {
|
|
public:
|
|
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char16_t, 10> table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(u"0123456789"))
|
|
;
|
|
};
|
|
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char16_t, 10> sprout::weed::detail::digits<char16_t>::table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(u"0123456789"))
|
|
;
|
|
|
|
template<>
|
|
struct digits<char32_t> {
|
|
public:
|
|
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char32_t, 10> table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(U"0123456789"))
|
|
;
|
|
};
|
|
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char32_t, 10> sprout::weed::detail::digits<char32_t>::table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(U"0123456789"))
|
|
;
|
|
#endif
|
|
|
|
template<typename Dummy>
|
|
struct values;
|
|
|
|
# define SPROUT_WEED_DIGITS_TABLE_DEF \
|
|
table_type{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}}
|
|
|
|
template<>
|
|
struct values<void> {
|
|
public:
|
|
typedef sprout::array<std::uint8_t, 10> table_type;
|
|
public:
|
|
SPROUT_STATIC_CONSTEXPR table_type table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(SPROUT_WEED_DIGITS_TABLE_DEF)
|
|
;
|
|
};
|
|
SPROUT_CONSTEXPR_OR_CONST sprout::weed::detail::values<void>::table_type
|
|
sprout::weed::detail::values<void>::table
|
|
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(SPROUT_WEED_DIGITS_TABLE_DEF)
|
|
;
|
|
|
|
# undef SPROUT_WEED_DIGITS_TABLE_DEF
|
|
|
|
template<typename IntType>
|
|
inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> value_at(std::size_t i) {
|
|
return i < 10
|
|
? sprout::tuples::tuple<IntType, bool>(
|
|
static_cast<IntType>(sprout::weed::detail::values<void>::table[i]),
|
|
true
|
|
)
|
|
: sprout::tuples::tuple<IntType, bool>(
|
|
IntType(),
|
|
false
|
|
)
|
|
;
|
|
}
|
|
template<typename IntType, typename Elem>
|
|
inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> from_digit(Elem c) {
|
|
return sprout::weed::detail::value_at<IntType>(
|
|
sprout::distance(
|
|
sprout::weed::detail::digits<Elem>::table.begin(),
|
|
sprout::find(
|
|
sprout::weed::detail::digits<Elem>::table.begin(),
|
|
sprout::weed::detail::digits<Elem>::table.end(),
|
|
c
|
|
)
|
|
)
|
|
);
|
|
}
|
|
} // namespace detail
|
|
} // namespace weed
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_WEED_DETAIL_DIGITS_HPP
|