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// https://habr.com/post/417027/
// Как я стандартную библиотеку C++11 писал или почему boost такой страшный
// https://github.com/oktonion/stdex/blob/1472fd5e2f5e0d10a136518631055c3aad2e1cfd/stdex/include/thread.hpp#L51


		template<class R, class T1>
		struct _function_traits<R(*)(T1)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T1 argument_type;
		};

		template<class R, class T1, class T2>
		struct _function_traits<R(*)(T1, T2)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			
			
		};

		template<class R, class T1, class T2, class T3>
		struct _function_traits<R(*)(T1, T2, T3)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			typedef T3 arg3_type;
		};

		template<class R, class T1, class T2, class T3, class T4>
		struct _function_traits<R(*)(T1, T2, T3, T4)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			typedef T3 arg3_type;
			typedef T4 arg4_type;
		};

		template<class R, class T1, class T2, class T3, class T4,
			class T5>
		struct _function_traits<R(*)(T1, T2, T3, T4, T5)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			typedef T3 arg3_type;
			typedef T4 arg4_type;
			typedef T5 arg5_type;
		};

		template<class R, class T1, class T2, class T3, class T4,
			class T5, class T6>
		struct _function_traits<R(*)(T1, T2, T3, T4, T5, T6)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			typedef T3 arg3_type;
			typedef T4 arg4_type;
			typedef T5 arg5_type;
			typedef T6 arg6_type;
		};

		template<class R, class T1, class T2, class T3, class T4,
			class T5, class T6, class T7>
		struct _function_traits<R(*)(T1, T2, T3, T4, T5, T6, T7)>
		{
			typedef R result_type;
			typedef T1 arg1_type;
			typedef T2 arg2_type;
			typedef T3 arg3_type;
			typedef T4 arg4_type;
			typedef T5 arg5_type;
			typedef T6 arg6_type;
			typedef T7 arg7_type;
		};

...