#pragma once #include <asl/format.hpp> #include <asl/utility.hpp> #include <asl/box.hpp> namespace asl::log { enum level : uint8_t { kDebug = 0, kInfo, kWarning, kError, }; struct message { level level; string_view message; source_location location; }; // @Todo Write and use an intrusive doubly-linked list class Logger { Logger* m_next{}; public: Logger() = default; ASL_DEFAULT_COPY_MOVE(Logger); virtual ~Logger() = default; virtual void log(const message&) = 0; friend void register_logger(box<Logger>); constexpr Logger* next_logger() const { return m_next; } }; // @Todo Make a deref_as trait & deref utility // @Todo Accept writer as box, pointer, reference, or value class DefaultLogger : public Logger { Writer* m_writer; public: explicit constexpr DefaultLogger(Writer* writer) : m_writer{writer} {} void log(const message&) override; }; void register_logger(box<Logger>); // @Todo Add a way to remove loggers (including all) template<typename T, typename... Args> requires constructible_from<T, Args&&...> && convertible_from<Logger*, T*> void register_logger(Args&&... args) { register_logger(make_box<T>(ASL_FWD(args)...)); } void log_inner(level l, string_view fmt, span<const format_internals::type_erased_arg> args, const source_location& sl); template<formattable... Args> void log(level l, const source_location& sl, string_view fmt, const Args&... args) { format_internals::type_erased_arg type_erased_args[] = { format_internals::type_erased_arg(args)... }; log_inner(l, fmt, type_erased_args, sl); } } // namespace asl::log // @Todo Compile-time configuration of logging #define ASL_LOG_DEBUG(...) ::asl::log::log(::asl::log::kDebug, ::asl::source_location{}, __VA_ARGS__) #define ASL_LOG_INFO(...) ::asl::log::log(::asl::log::kInfo, ::asl::source_location{}, __VA_ARGS__) #define ASL_LOG_WARNING(...) ::asl::log::log(::asl::log::kWarning, ::asl::source_location{}, __VA_ARGS__) #define ASL_LOG_ERROR(...) ::asl::log::log(::asl::log::kError, ::asl::source_location{}, __VA_ARGS__)