std::bind_front Library in C++20

std::bind_front (Func&& func, Args&& ... args) creates a callable wrapper for a callable func. std::bind_front can have an arbitrary number of arguments and binds its arguments to the front.

🔑 std::bind_front versus std::bind

Since C++11, we have had std::bind and lambda expressions. With C++20, we get std::bind_front. This may make you wonder. To be pedantic std::bind is available since the Technical Report 1 (TR1). std::bind and lambda expressions can be used as a replacement for std::bind_front. Furthermore, std::bind_front seems like the little sister of std::bind, because only std::bind supports the rearranging of arguments. Of course, there is a reason to use std::bind_front in the future: in contrast to std::bind, std::bind_front propagates the exception specification of the underlying call operator.