Article View: gnu.g++.bug
Article #504Re: G++ 1.36 problem?
From: Doug Schmidt
Date: Mon, 16 Oct 1989 22:20
Date: Mon, 16 Oct 1989 22:20
31 lines
1739 bytes
1739 bytes
In article <46991@bbn.COM>, mthome@bbn (Mike Thome) writes:
>Now that I've got g++ working here (thanks those who responded to my
>earlier plea for help), I've got another problem...
>The following code fragment (from InterViews):
> class Resource {
> public:
> Resource () { refcount = 1; }
> ~Resource () { if (--refcount > 0) { this = 0; } }
>
> void Reference () { ++refcount; }
> int LastRef () { return refcount == 1; }
> private:
> unsigned refcount;
> };
>
>Generates the following error message:
> foo.c: In method Resource::~Resource ():
> foo.c:4: assignment of read-only parameter `$this'
>
>As far as I can tell from Stroustrup, this appears to be a perfectly
>valid use of THIS in a destructer. What's going on here?
Assigning to this is an anachronism. However, you can make g++
accept this via the -fthis-is-variable option.
Doug
--
Master Swordsman speak of humility; | schmidt@ics.uci.edu (ARPA)
Philosophers speak of truth; | office: (714) 856-4034
Saints and wisemen speak of the Tao of no doubt;
The moon, sun, and sea speaks for itself. -- Hiroshi Hamada
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<1989Oct16.222036.20829@paris.ics.uci.edu>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!apple!usc!orion.oac.uci.edu!uci-ics!newsReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!apple!usc!orion.oac.uci.edu!uci-ics!news From: schmidt@glacier.ics.uci.edu (Doug Schmidt) Newsgroups: gnu.g++.bug Subject: Re: G++ 1.36 problem? Message-ID: <1989Oct16.222036.20829@paris.ics.uci.edu> Date: 16 Oct 89 22:20:36 GMT References: <46991@bbn.COM> Sender: news@paris.ics.uci.edu (Network News) Reply-To: schmidt@glacier.ics.uci.edu (Doug Schmidt) Organization: University of California, Irvine - Dept of ICS Lines: 31 In-reply-to: mthome@bbn.com (Mike Thome)