Re: proposal: renew & relocator member fn

Article View: comp.std.c++

Article #3365

#3365

From: Tony Cook
Date: Tue, 20 Feb 1996 23:22

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devitto@ferndown.ate.slb.com wrote:
: On 10 Feb 96 08:35:39 GMT, john (j.d.) hickin (hickin@bnr.ca) wrote:
: : |> Go ahead, shoot me down!

: : POW!

: I 'wrote' with Bjarne about a general 'renew' a couple of years ago.  u
: Basically the problem is that a general "resize this C array" routine is 
: difficult without virtual contructors, and virtual copy constructors 
: - otherwise the routine would need static type binding (templates).

Urr...why?

Doesn't using delete [] on a pointer with the wrong static type
produce undefined behaviour anyway? ([expr.delete] stanza 3)

Actually, if we had a memory allocator that split what realloc does
into 'attempt to expand this block' and 'allocate a new block' then
we can write renew ourselves.  Unfortunately, at least some,
operating systems, won't support this.
-- 
        Tony Cook - tony@online.tmx.com.au
                    100237.3425@compuserve.com
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Path: arc1-ca.pugleaf.net!chronicle.mti.sgi.com!austern
From: tony@online.tmx.com.au (Tony Cook)
Newsgroups: comp.std.c++
Subject: Re: proposal: renew & relocator member fn
Date: 20 Feb 1996 15:22:24 PST
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