Path: utzoo!attcan!uunet!taumet!steve
From: steve@taumet.com (Stephen Clamage)
Newsgroups: comp.lang.c++
Subject: Re: Failed constructors ( Was Re: Failed allocation in constructors? )
Keywords: exception handling
Message-ID: <329@taumet.com>
Date: 21 Jul 90 18:01:32 GMT
References: <11061@alice.UUCP>
Organization: Taumetric Corporation, San Diego
Lines: 30

garry@alice.UUCP (garry hodgson) writes:

>What I'd like to do is something like:

>	Connection *connection = new Connection( "kgbvax", PortNum );
>	if ( connection )
>		SendSecretDocuments( connection );
>	else	ComplainLoudly();

>Instead, what I do is:

>	Connection *connection = new Connection( "kgbvax", PortNum );
>	if ( connection->status() == GoAhead )
>		SendSecretDocuments( connection );
>	else	ComplainLoudly();

Sounds to me like a coding style issue.  If you really object to coding
	if ( connection->status() == GoAhead )
you could define operator() or operator! as in the streams library,
and code
	if ( (*connection)() )	// ok
or
	if ( !*connection )	// fail

In general, it would seem to be an advantage to detect the difference
between out of memory and the constructor failing for some other
reason.
-- 

Steve Clamage, TauMetric Corp, steve@taumet.com