[boost] Re: Perfect Forwarding (almost)

From: Daniel Frey (d.frey_at_[hidden])
Date: 2004-02-07 05:16:28

On Sat, 07 Feb 2004 01:00:49 +0100, David Abrahams wrote:

> The example below shows a technique for perfect forwarding that seems to
> work with GCC 3.3.1.  rvalues are always moved automatically, and
> lvalues are copied.

Nice. No, more than that, it's great!

FWIW, I discovered that you can reduce the number of temporaries/objects
further. In source() and csource(), change 'return X();' to 'X nrv; return
nrv;'. Although I have to admit that I'm at a loss why the NRVO works
while the RVO seems to be broken for your code (tested on Intel 7.1 and
the GCC 3.3.2).

Regards, Daniel