Automatically handle switch between standalone fmt, spdlog bundled fmt and no fmt

openVulkanoCpp/Math/ByteSize.hpp

@@ -12,7 +12,14 @@
 #include <regex>
 #include <iomanip>
 #include <sstream>
+#if __has_include("fmt/format.h")
+#include <fmt/format.h>
+#elif __has_include("spdlog/fmt/fmt.h")
 #include <spdlog/fmt/fmt.h>
+#else
+#warning "Failed to find fmt include"
+#define OVKMBS_FMT_MISSING
+#endif
 #include <magic_enum.hpp>
 
 namespace openVulkanoCpp
@@ -154,6 +161,7 @@ namespace openVulkanoCpp
 	inline constexpr ByteSize operator""  _EB(unsigned long long int num) { return { num, ByteSizeUnit::EB }; }
 }
 
+#ifndef OVKMBS_FMT_MISSING
 template<> struct fmt::formatter<openVulkanoCpp::ByteSize>
 {
 	template<typename ParseContext> constexpr auto parse(ParseContext& ctx)
@@ -166,3 +174,4 @@ template<> struct fmt::formatter<openVulkanoCpp::ByteSize>
 		return format_to(ctx.out(), "{}", bs.Format());
 	}
 };
+#endif