[Melbourne-pm] Closures and scope warnings
Jacinta Richardson
jarich at perltraining.com.au
Tue Jul 27 20:34:26 PDT 2010
Toby Corkindale wrote:
> Hmm,
> here's something that caught me out.. probably because it's not great
> practice. (But it is a common theme in using DBIx::Class transactions)
>
> my $thing;
> sub { my $thing = 'wibble' }->();
This isn't just constrained to this circumstance, and is probably normally
considered a feature. Consider:
my $name = "Jacinta";
print_name($name);
#### much later
sub name {
my $name = shift;
print "$name\n";
return;
}
Would you *really* want every subroutine which creates variables which shadow
top-level variables to warn about such? I don't think Perl distinguishes
between your case and mine.
J
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