Really? I think most either don't know or prefer avoiding code_refs.
It's a very special magic which is practically not mentioned in the docs and never in conjunction with the word "private".
I grepped thru all pods for ->$ and found only 10 occurences from which 8 are only of the string form ->$methname and only 2 with ->$coderef:
/usr/share/perl/5.10/pod/perlbot.pod: $self->{'delegate'}->$
+AUTOLOAD(@_);
/usr/share/perl/5.10/pod/perlfaq7.pod: $widget->$tric
+k();
/usr/share/perl/5.10/pod/perlsec.pod: $obj->$method(@args);
/usr/share/perl/5.10/pod/perltooc.pod: $self->$methname($newvalue
+);
/usr/share/perl/5.10/pod/perltooc.pod: $self->$coderef($newvalue)
+;
/usr/share/perl/5.10/pod/perltoot.pod: return ref_to($c
+lass->$methname);
/usr/share/perl/5.10/pod/perltoot.pod: return ref_to($c
+lass->$methname);
/usr/share/perl/5.10/pod/perlunicode.pod: return $sth->$what;
/usr/share/perl/5.10/pod/perlunicode.pod: my @arr = $sth->$what
+;
/usr/share/perl/5.10/pod/perlunicode.pod: my $ret = $sth->$what
+;
the only explanation I found was in perlop
The Arrow Operator
""->"" is an infix dereference operator, just as it is in C and C++.
If the right side is either a "...", "{...}", or a "(...)" subscript,
then the left side must be either a hard or symbolic reference to an
array, a hash, or a subroutine respectively. (Or technically speaking,
a location capable of holding a hard reference, if it’s an array or
hash reference being used for assignment.) See perlreftut and perlref.
Otherwise, the right side is a method name or a simple scalar variable
containing either the method name or a subroutine reference, and the
left side must be either an object (a blessed reference) or a class
name (that is, a package name). See perlobj.
Cheers Rolf
( addicted to the Perl Programming Language)
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