Move constructor for std::string from char*

I have a function f returning a char*. The function documentation says:

The user must delete returned string

I want to construct a std::string from it. The trivial things to do is:

char* cstring = f();
std::string s(cstring);
delete cstring;

Is it possibile to do it better using C++ features? I would like to write something like

std::string(cstring)

avoiding the leak.