35 lines
995 B
C++
35 lines
995 B
C++
#pragma once
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#include <date/tz.h>
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#include <fmt/format.h>
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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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