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Add string_view overloads to parse functions

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Howard Hinnant
2021-05-19 14:13:33 -04:00
parent 052eebaf00
commit e23c15bb36
1 changed files with 61 additions and 0 deletions
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61
include/date/date.h
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@@ -8070,6 +8070,16 @@ public:
, offset_(offset)
{}
#if HAS_STRING_VIEW
parse_manip(std::basic_string_view<CharT> format, Parsable& tp,
std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
std::chrono::minutes* offset = nullptr)
: format_(format)
, tp_(tp)
, abbrev_(abbrev)
, offset_(offset)
{}
#endif // HAS_STRING_VIEW
};
template <class Parsable, class CharT, class Traits, class Alloc>
@@ -8175,6 +8185,57 @@ parse(const CharT* format, Parsable& tp,
return {format, tp, &abbrev, &offset};
}
#if HAS_STRING_VIEW
// basic_string_view formats
template <class Parsable, class CharT>
inline
auto
parse(std::basic_string_view<CharT> format, Parsable& tp)
-> decltype(from_stream(std::declval<std::basic_istream<CharT>&>(), format.data(), tp),
parse_manip<Parsable, CharT>{format, tp})
{
return {format, tp};
}
template <class Parsable, class CharT, class Traits, class Alloc>
inline
auto
parse(std::basic_string_view<CharT> format,
Parsable& tp, std::basic_string<CharT, Traits, Alloc>& abbrev)
-> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(), format.data(),
tp, &abbrev),
parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev})
{
return {format, tp, &abbrev};
}
template <class Parsable, class CharT>
inline
auto
parse(std::basic_string_view<CharT> format, Parsable& tp, std::chrono::minutes& offset)
-> decltype(from_stream(std::declval<std::basic_istream<CharT>&>(), format.data(),
tp, std::declval<std::basic_string<CharT>*>(), &offset),
parse_manip<Parsable, CharT>{format, tp, nullptr, &offset})
{
return {format, tp, nullptr, &offset};
}
template <class Parsable, class CharT, class Traits, class Alloc>
inline
auto
parse(std::basic_string_view<CharT> format, Parsable& tp,
std::basic_string<CharT, Traits, Alloc>& abbrev, std::chrono::minutes& offset)
-> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(), format.data(),
tp, &abbrev, &offset),
parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev, &offset})
{
return {format, tp, &abbrev, &offset};
}
#endif // HAS_STRING_VIEW
// duration streaming
template <class CharT, class Traits, class Rep, class Period>