Re: Re: string as ref ?!?!

Yeah, I've already realized what this is just symbolic reference... I've doublechecked `perldoc perlref`, and now, when I know what to search for I've found only one sentence about this issue: "Using a string or number as a reference produces a symbolic reference, as explained above.". And there in nothing more about this issue "above". :-( Anyway, I think a couple of examples like:

"Test"->{qwe} = 111;
"Test"->[1] = 222;
[download]

will be nice to have in perlref...

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Re: string as ref ?!?! by Abigail-II (Bishop) on May 10, 2004 at 11:12 UTC
Examples from perlref dealing with symbolic references: `$name = "foo"; $$name = 1; # Sets $foo ${$name} = 2; # Sets $foo ${$name x 2} = 3; # Sets $foofoo $name->[0] = 4; # Sets $foo[0] @$name = (); # Clears @foo &$name(); # Calls &foo() (as in Perl 4) $pack = "THAT"; ${"${pack}::$name"} = 5; # Sets $THAT::foo without eval` [download] Abigail	[reply] [d/l]
Re: Re: Re: string as ref ?!?! by hardburn (Abbot) on May 10, 2004 at 19:52 UTC
I've already realized what this is just symbolic reference No, it isn't. A symbolic ref uses the string in the variable as the name of a package variable: `my $f = "foo"; our $foo = "blah"; print $$f; __OUTPUT__ blah` [download] The behavior you're seeing in your example code is autovivification. You tell Perl that you want a hashref, so you get one. This behavior is forbidden by `use strict 'refs'`. For that, you should explicitly put a hashref into the variable, such as with `my $var = { };` or `my $var = \%hash;`. ---- `: () { :\|:& };:` Note: All code is untested, unless otherwise stated	[reply] [d/l] [select]