On Wed, 2005-02-09 at 01:24, Beck01, Wolfgang wrote:

> > I seek a solution which minimises the number of assignments. 
[]
> you probably know the 'xor trick' to swap value without a temporary:

I've heard of it :)

> Certainly not what you were looking for, but always nice :-)

You are right, it isn't useful here for three reasons:

(1) the values being assigned aren't necessarily bitwise
  copyable, in fact they're (more or less) arbitrary C++ values

(2) The intent is to reduce time not storage

(3) The RHS can be arbitrary expressions. To apply XOR,
we'd first assign each RHS expression to a temporary ..
and having done that we no longer need XOR, we can just
assign variables to those temporaries.

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