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Postings from April 2008
On Fri, Apr 25, 2008 at 01:07:29PM -0500, David Nicol wrote:
> On Fri, Apr 25, 2008 at 5:17 AM, Nicholas Clark <nick@ccl4.org> wrote:
>
> > didn't do what I expected, because that constant string "constant" in the
> > optree isn't constant. Well, it can't be written to, but it gets conversions
> > cached on it.
>
> If conversions of constants were done early instead
> of cached, there wouldn't even be the opportunity to warn.
>
> Do we have consensus on this issue?
No, because then all constants would use a lot more memory:
$ perl -MDevel::Peek -e 'sub a {Dump $_[0]; $_[0] + 0} a("pie") for 0,1'
SV = PV(0x801168) at 0x80021c
REFCNT = 1
FLAGS = (POK,READONLY,pPOK)
PV = 0x2017c0 "pie"\0
CUR = 3
LEN = 4
SV = PVNV(0x803468) at 0x80021c
REFCNT = 1
FLAGS = (IOK,NOK,POK,READONLY,pIOK,pNOK,pPOK)
IV = 0
NV = 0
PV = 0x2017c0 "pie"\0
CUR = 3
LEN = 4
Nicholas Clark
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