id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12353	std::unary_function is removed in c++17, but still used in hash lib	neveralso@…	Daniel James	"In file  boost/functional/hash/hash.hpp line 438

I compiled in Visual Studio 2015 with /std:c++latest option. Compiler reports that the unary_function is not a member of ""std"".

Here is the cpp doc about std::unary_function, std::unary_function is deprecated in C++11 and removed in C++17

http://en.cppreference.com/w/cpp/utility/functional/unary_function"	Bugs	closed	To Be Determined	hash	Boost 1.61.0	Problem	fixed	c++17 unary_function