Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ames!ncar!tank!uxc!uxc.cso.uiuc.edu!a.cs.uiuc.edu!p.cs.uiuc.edu!johnson
From: johnson@p.cs.uiuc.edu
Newsgroups: comp.lang.c++
Subject: Re: Emulate elementsPerform:with: metho
Message-ID: <77300013@p.cs.uiuc.edu>
Date: 10 Oct 88 12:32:00 GMT
References: <3287@tekig4.TEK.COM>
Lines: 11
Nf-ID: #R:tekig4.TEK.COM:3287:p.cs.uiuc.edu:77300013:000:575
Nf-From: p.cs.uiuc.edu!johnson    Oct 10 07:32:00 1988


>I would like to send a message to each element on a list of objects.
>I'd also like the message to be an argument that I give to the routine
>that does the sending.  This emulates the action of the Objective-C
>elementsPerform:with: method.  So far, I can't see a way to do this
>using, for instance, pointers to member functions.

Assumeing that you have a list of objects of classes that are subclasses
of T, you can pass in a function on objects of T that sends the message.
The routine that does the sending will then evaluate the function for
each element of the list.