TryAsync.mpp

export module CppUtils.Thread.TryAsync;

import std;

export namespace CppUtils::Thread
{
	[[nodiscard]] inline auto tryAsync(auto&& function, auto&&... args) -> decltype(auto)
	{
		return std::async(std::launch::async, [function = std::forward<decltype(function)>(function), ... args = std::forward<decltype(args)>(args)]() mutable -> std::expected<std::invoke_result_t<decltype(function), decltype(args)...>, std::runtime_error> {
			try
			{
				if constexpr (std::is_void_v<std::invoke_result_t<decltype(function), decltype(args)...>>)
					function(std::forward<decltype(args)>(args)...);
				else
					return function(std::forward<decltype(args)>(args)...);
			}
			catch (const std::exception& exception)
			{
				return std::unexpected{std::runtime_error{exception.what()}};
			}
			catch (...)
			{
				return std::unexpected{std::runtime_error{"Unknown exception occurred"}};
			}
			return {};
		});
	}
}