On Thu, Sep 14, 2006 at 10:28:39AM +0200, Georg Baum wrote:
> > struct A { };
> > void operator+=(A &, int) {}
> > int main() { A a; a += 1; }
> >
> > should compile just fine.
>
> Then you can explain to me why operator+= is a class member of std:string? I
> don't want to add an out-of-class opertaor+= without knowing why the
> existing ones are members.
Because in-class is working as well and the prefered style. However, the
out-of-class version is there for exactly ou purpose: when the class
itself cannot/should not be modified.
Andre'
