Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Re: Source filter or PadWalker. Both are ugly

by imp (Priest)
on Dec 08, 2006 at 11:18 UTC ( #588559=note: print w/ replies, xml ) Need Help??


in reply to Source filter or PadWalker. Both are ugly
in thread How to extract the name of a variable?

It didn't seem fair (or fun) to provide a PadWalker example, and not a Filter::Simple one. I don't recommend using either of these approaches, but here is a basic(?) filter implementation: ShownameFilter.pm

package ShownameFilter; use Filter::Simple; FILTER_ONLY code => sub { s{ showname\( ( # Capture 2 (closes second) \s* \\? # References [\$@%*]+ # Scalar, array, hash, glob ( # Capture 1 (closes first) \w* # alphanumeric. Doesn't catch a lot of perl spe +cial vars ) # End capture 1 \s* ) # End capture 2 \) } {showname('$2',$1)}xg; }; 1;
showname.pl
use strict; use warnings; use ShownameFilter; sub showname { my ($name,$value) = @_; print "name: $name\n"; } my ($x, $x12, @foo, %bar); showname($x); showname( $x12 ); showname( \$x12 ); showname( @foo );
Output:
name: x name: x12 name: x12 name: foo
Again - I don't recommend doing this.


Comment on Re: Source filter or PadWalker. Both are ugly
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://588559]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (6)
As of 2015-08-01 00:39 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (285 votes), past polls