Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-pcd!hplsla!jima
From: jima@hplsla.HP.COM (Jim Adcock)
Newsgroups: comp.lang.c++
Subject: Re: Exception handling and transaction management?
Message-ID: <6590181@hplsla.HP.COM>
Date: 5 Jul 89 17:43:51 GMT
References: <546@voodoo.UUCP>
Organization: HP Lake Stevens, WA
Lines: 35

>re: iterations
>
>	basically, some linguistic concept that allows you to iterate
>	over the contents of a class, e..g, a bag, a list, a whatever.
>
>	while it's true that C++ doesn't have iterators, it's not clear
>	that it needs them. Libg++ has the Pix (pseudo-index) class
>	that resolves this problem (albeit, perhpas not as `nicely'
>	as the iterators in clu).
>
>	this is an important concept, but it's not clear that it needs
>	linguistic methods to be possible.

The emerging standard for iterators seems to be overloading operator()()
to provide interation.

See Lippman pgs 260-261, among other examples.  Then iteration becomes
something like:

anObject myInstance;
CollectionClass myCollection;

....

while (myInstance = myCollection())
{
  doSomethingWith(myInstance);
  ...
}

>re: exceptions	

Lippman pg 24 mentions "handle" -- actually changed since to "catch" -- but I
haven't found this keyword discussed anywhere.  Does anyone know if this
relates to exception handling?