he.cpp

struct InternalCommand : Command { CmdUnpackProc *unpack_cmd; };

template <Commands Tcmd>
constexpr CmdUnpackProc *MakeCmdTrampoline()
{
	return [](const CommandContainer *cp, bool my_cmd) -> bool {
		return DoCommand<Tcmd>::FromNet(my_cmd, cp->err_msg, cp->callback, cp->tile, cp->p1, cp->p2, cp->text);
	};
}

template <typename T>
inline constexpr InternalCommand CommandFromTrait() noexcept { return { T::proc, T::name, T::flags, T::type, MakeCmdTrampoline<T::cmd>() }; };

template<typename T, T... i>
inline constexpr auto MakeCommandsFromTraits(std::integer_sequence<T, i...>) noexcept {
	return std::array<InternalCommand, sizeof...(i)>{{ CommandFromTrait<CommandTraits<static_cast<Commands>(i)>>()... }};
}

static constexpr auto _command_proc_table = MakeCommandsFromTraits(std::make_integer_sequence<std::underlying_type_t<Commands>, CMD_END>{});