Well, you _can't_ return a function. You could return a function pointer or a delegate, but not a function. What would it even mean to return a function?
Well, it works. This compiles:
auto bug(alias f)()
{
return f;
}
void fun() {}
void main()
{
bug!fun(); //Error: functions cannot return a function
}
So why can't I return cast(typeof(f))&f? Furthermore, it gives me
the exact same error when I change it to `return *&f`.
