I love Smart::Comments, use it a bunch. I got greedy and wanted to simply switch it on and off using a variable/optin whatnot.

Thing is , it's a 'source filter'- it does stuff to your code that changes the behaviour- pre compile. Very witty. So.. the following does not work:

#!/usr/bin/perl -w
use strict;
use Smart::Comments '###';
use Getopt::Std;

my $o = {};
getopts('d', $o);

### smart comments are on 

unless ($o->{d}) {
    print STDERR 'debug is not on. no smart comments..';
    no Smart::Comments;
}

### i'd like this to output if -d is used

[download]

But of course every comment after no Smart::Comments; will not be parsed to output.

I tried an eval of 'no Smart::Comments' - but that must run before the whole script is compiled- so ... no cigar. I tried some variations of eval and require too.

I also tried a wasteful pre compile to set Smart::Comments to on- but it won't fly through to the rest of the script.

Any suggestions? This is mainly curiosity- seems like an interesting problem. Would there be a way to programmatically (that's a word?) turn off or on a source filter to the same calling source?- ach- head hurts :-)

In reply to Smart::Comments source filter on or off .. post compile? by leocharre

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