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Re: Rewriting sub code on import to add logging

by citromatik (Curate)
on May 14, 2008 at 10:51 UTC ( #686492=note: print w/replies, xml ) Need Help??


in reply to Rewriting sub code on import to add logging

So part of the problem (apart from my inability to get this to work at all) is that the warn statements are outside the $code->() call. Is there a way I can append them inside the subroutine itself?

You may find interesting this post. You can edit the source of the subroutines and evaluate it into code again:

use B::Deparse; sub something { my ( $self, $param ) = @_; return _stuff($param); } my $subref = \&something; my $code = B::Deparse->new->coderef2text($subref); print "Before editing &something:\n",$code; $code =~ s/\{/\{\nlog_msg('starting sub');\n/; *something = eval "sub $code"; $code = B::Deparse->new->coderef2text(\&subref); print "\nAfter editing &something:\n",$code;

Outputs:

Before editing &something: { use warnings; use strict 'refs'; my($self, $param) = @_; return _stuff($param); } After editing &something: { use warnings; use strict 'refs'; log_msg('starting sub'); my($self, $param) = @_; return _stuff($param); }

Hope this helps

citromatik

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