Sorry, I couldn't find a better subject...

Well, perl -le 'print for keys %::' gives me:

^R
^X
"
$
+
-
/
0
<none>::
@
ARGV
CORE::
DB::
DynaLoader::
ENV
INC
IO::
Internals::
PerlIO::
Regexp::
STDERR
STDIN
STDOUT
UNIVERSAL::
_
_<-e
_<perlio.c
_<perlmain.c
_<universal.c
_<xsutils.c
attributes::
main::
stderr
stdin
stdout
utf8::

Now the question is: I understand why most of those are there, but there are some that I can't quite make sense of. Specifically:

• what are the lowercase qw/stderr stdin stdout/ for?
• What do the _<-ones mean?
• Also, I can understand why Regexp:: is there, namely because a regexp (e.g. as returned by qr//) is a blessed reference to a Regex object. But then further investigation tells me that the only key of %Regexp:: is DESTROY, which makes sense as well, but I'd be curious as to know further details of the mechanism behind this and precisely when and where the destructor is used.

20050508 Unconsidered by Corion: Was edit:26 keep:18 del:0,Considered: friedo: Change title to "Default symbol table in main" or similar

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