Extended Description

We're missing deduction guides for std::function. The following code does not compile with libc++ trunk:

#include

int func(double) { return 0; }
int main() {
std::function f{func}; // guide #​1 deduces function<int(double)>
int i = 5;
std::function g = & { return i; }; // guide #​2 deduces function<int(double)>
}

Taken from SO question: https://stackoverflow.com/q/53217511/1708801