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Re: Extract subroutines from a Perl script. OR: "Only perl can parse Perl." But can it help me to do so?

by hv (Parson)
on Sep 24, 2004 at 10:57 UTC ( #393448=note: print w/replies, xml ) Need Help??


in reply to Extract subroutines from a Perl script. OR: "Only perl can parse Perl." But can it help me to do so?

If you need to extract the exact source code, it may be quite difficult. If it is sufficient to get a functional equivalent, look into B::Deparse; from the docs:

use B::Deparse; $deparse = B::Deparse->new("-p", "-sC"); $body = $deparse->coderef2text(\&func);
and here's a specific example as a one-liner:
zen% perl -MB::Deparse -MCarp -wle 'print B::Deparse->new("-p","-sC" +)->coderef2text(\&Carp::confess)' { package Carp; die(longmess(@_)); } zen%

See the rest of the docs for full details of the options available.

Hugo

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[Discipulus]: my ($need,$opta,$optb ) = @_; .. if $opta..
[shmem]: all else leads to trouble, even if the third argument depends on the existence of the second. That may become brittle.
[Discipulus]: but if have case like subname(15,undef,3 ) maybe bettere named parameters
[Lady_Aleena]: I don't want to have to do: alpha_menu($hash, undef, $type);
[Lady_Aleena]: Or what Discipulus said.
[shmem]: Lady_Aleena: geany supports ctags.
[Discipulus]: a good compromise can be my ($need, $opts_ref) = @_ a scalar and an hash reference
[Discipulus]: see you monks!
[Lady_Aleena]: shmem, let me get this sub rewritten, then I will look into how to use ctags in geany. Deal? 8)
[shmem]: Discipulus: yeah, that might eventually prepare the path for OO ;-)

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