82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
#pragma once
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#include <chrono>
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#if HAVE_CHRONO_TIMEZONES
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#include <format>
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#else
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#include <date/tz.h>
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#include <fmt/format.h>
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#include <regex>
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#endif
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// Date
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namespace date {
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#if HAVE_CHRONO_TIMEZONES
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using namespace std::chrono;
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using namespace std;
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#else
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using system_clock = std::chrono::system_clock;
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using seconds = std::chrono::seconds;
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template <typename T>
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inline auto format(const char* spec, const T& arg) {
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return date::format(std::regex_replace(spec, std::regex("\\{:L|\\}"), ""), arg);
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}
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template <typename T>
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inline auto format(const std::locale& loc, const char* spec, const T& arg) {
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return date::format(loc, std::regex_replace(spec, std::regex("\\{:L|\\}"), ""), arg);
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}
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constexpr decltype(auto) operator""d(unsigned long long d) noexcept {
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return date::operator""_d(d); // very verbose, but it works
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}
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#endif
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} // namespace date
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// Format
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namespace waybar::util::date::format {
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#if HAVE_CHRONO_TIMEZONES
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using namespace std;
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#else
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using namespace fmt;
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#endif
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} // namespace waybar::util::date::format
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#if not HAVE_CHRONO_TIMEZONES
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template <typename Duration, typename TimeZonePtr>
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struct fmt::formatter<date::zoned_time<Duration, TimeZonePtr>> {
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std::string_view specs;
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template <typename ParseContext>
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constexpr auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
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auto it = ctx.begin();
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if (it != ctx.end() && *it == ':') {
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++it;
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}
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auto end = it;
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while (end != ctx.end() && *end != '}') {
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++end;
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}
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if (end != it) {
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specs = {it, std::string_view::size_type(end - it)};
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}
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return end;
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}
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template <typename FormatContext>
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auto format(const date::zoned_time<Duration, TimeZonePtr>& ztime, FormatContext& ctx) {
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if (ctx.locale()) {
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const auto loc = ctx.locale().template get<std::locale>();
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return fmt::format_to(ctx.out(), "{}", date::format(loc, fmt::to_string(specs), ztime));
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}
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return fmt::format_to(ctx.out(), "{}", date::format(fmt::to_string(specs), ztime));
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}
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};
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#endif
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using namespace date;
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