1 files changed, 2 insertions, 84 deletions
diff --git a/include/spdlog/fmt/chrono.h b/include/spdlog/fmt/chrono.h
index 17013bc1..83fad2ff 100644
--- a/include/spdlog/fmt/chrono.h
+++ b/include/spdlog/fmt/chrono.h
@@ -4,93 +4,11 @@
 //
 
 #pragma once
-
-#if defined(SPDLOG_USE_STD_FORMAT)
-// Add a formatter for std::tm, since std::format only supports std::chrono
-// taken from fmtlib
-#include <cassert>
-#include <ctime>
-#include <format>
-#include <string>
-#include <string_view>
-#include <type_traits>
-#include <spdlog/common.h>
-
-namespace spdlog::details
-{
-    inline size_t strftime(char *str, size_t count, const char *format, const std::tm *time)
-    {
-        // Assign to a pointer to suppress GCCs -Wformat-nonliteral
-        // First assign the nullptr to suppress -Wsuggest-attribute=format
-        std::size_t (*strftime)(char*, std::size_t, const char*, const std::tm*) = nullptr;
-        strftime = std::strftime;
-        return strftime(str, count, format, time);
-    }
-
-    inline size_t strftime(wchar_t *str, size_t count, const wchar_t *format, const std::tm *time)
-    {
-        // See above
-        std::size_t (*wcsftime)(wchar_t*, std::size_t, const wchar_t*, const std::tm*) = nullptr;
-        wcsftime = std::wcsftime;
-        return wcsftime(str, count, format, time);
-    }
-
-    // Casts a nonnegative integer to unsigned.
-    template <typename Int>
-    SPDLOG_CONSTEXPR auto to_unsigned(Int value) -> typename std::make_unsigned<Int>::type
-    {
-        assert(value >= 0, "negative value");
-        return static_cast<typename std::make_unsigned<Int>::type>(value);
-    }
-}
-
-template <typename Char>
-struct std::formatter<std::tm, Char>
-{
-    template <typename ParseContext>
-    SPDLOG_CONSTEXPR_FUNC auto parse(ParseContext &ctx) -> decltype(ctx.begin())
-    {
-        auto it = ctx.begin();
-        if (it != ctx.end() && *it == ':') ++it;
-        auto end = it;
-        while (end != ctx.end() && *end != '}') ++end;
-        specs = {it, spdlog::details::to_unsigned(end - it)};
-        return end;
-    }
-
-    template <typename FormatContext>
-    auto format(const std::tm &tm, FormatContext &ctx) const -> decltype(ctx.out()) {
-        basic_string<Char> tm_format;
-        tm_format.append(specs);
-        // By appending an extra space we can distinguish an empty result that
-        // indicates insufficient buffer size from a guaranteed non-empty result
-        // https://github.com/fmtlib/fmt/issues/2238
-        tm_format.push_back(' ');
-
-        const size_t MIN_SIZE = 10;
-        basic_string<Char> buf;
-        buf.resize(MIN_SIZE);
-        for (;;)
-        {
-            size_t count = spdlog::details::strftime(buf.data(), buf.size(), tm_format.c_str(), &tm);
-            if (count != 0)
-            {
-                buf.resize(count);
-                break;
-            }
-            buf.resize(buf.size() * 2);
-        }
-        // Remove the extra space.
-        return std::copy(buf.begin(), buf.end() - 1, ctx.out());
-    }
-
-    basic_string_view<Char> specs;
-};
-
-#else
 //
 // include bundled or external copy of fmtlib's chrono support
 //
+
+#if !defined(SPDLOG_USE_STD_FORMAT)
 #    if !defined(SPDLOG_FMT_EXTERNAL)
 #        ifdef SPDLOG_HEADER_ONLY
 #            ifndef FMT_HEADER_ONLY