Re: [GiNaC-list] Getting a pointer to an element in a list?

17 Aug 2005

      I want to update the expression from outisde the class, ie something like

ex &x = myobject->getExpression(17);
x = x.subs(y==5);

How would you suggest I did that? I think that a copy constructor is
getting called somewhere but I haven't worked out where yet.

Cheers

JP

Christian Bauer wrote:
...
Hi!
On Wed, Aug 17, 2005 at 01:25:16AM +1000, John Pye wrote:
...
const ex * getExpressionPtr(const unsigned &i) const{
     *return* &(F[i]);
  }
Hm, why do you want to do this? An 'ex' is already a pointer to something,
so I don't see much advantage over
ex getExpression(unsigned i) const { return F[i]; }
Bye,
Christian