[boost] Re: Basic guarantee and synchronized multiple updates.

From: Hillel Y. Sims (hsims_at_[hidden])
Date: 2002-09-27 11:25:42

"Fredrik Blomqvist" <f_blq_at_[hidden]> wrote in message
news:20020927153922.41928.qmail_at_web13506.mail.yahoo.com...
> >     {
> >         vector1.push_back(e1);
> >         try {
> >             vector2.push_back(e2):
> >         }
> >         catch(...) {
> >             vector1.pop_back();
> >             throw;
> >         }
>
> Isn't this a good example of something scopeguard +
> bind/lambda would be well suited to handle?
>  IIRC Alexandrescu & Marginean's original CUJ article
> about scopeguard investigated a case very similar to
> this.
>

{
    vector1.push_back(e1);
    ScopeGuard guard = MakeObjScopeGuard(vector1,
{typeof(vector1)}::pop_back);
    vector2.push_back(e2);
    guard.Dismiss();
}

ScopeGuard rules!

hys

--
Hillel Y. Sims
FactSet Research Systems
hsims AT factset.com