logging/log.h: move enum class formatter to a separate file ...

... to common/logging/formatter.h

1 files changed, 23 insertions, 0 deletions

diff --git a/src/common/logging/formatter.h b/src/common/logging/formatter.h
new file mode 100644
index 000000000..552cde75a
--- /dev/null
+++ b/src/common/logging/formatter.h
@@ -0,0 +1,23 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <type_traits>
+
+#include <fmt/format.h>
+
+// adapted from https://github.com/fmtlib/fmt/issues/2704
+// a generic formatter for enum classes
+#if FMT_VERSION >= 80100
+template <typename T>
+struct fmt::formatter<T, std::enable_if_t<std::is_enum_v<T>, char>>
+    : formatter<std::underlying_type_t<T>> {
+    template <typename FormatContext>
+    auto format(const T& value, FormatContext& ctx) -> decltype(ctx.out()) {
+        return fmt::formatter<std::underlying_type_t<T>>::format(
+            static_cast<std::underlying_type_t<T>>(value), ctx);
+    }
+};
+#endif