Perl Guru Forums: Perl Programming Help: Advanced: parse perl code? wanna get all variables from perl code

CGI/Perl Guide | Learning Center | Forums | Advertise | Login

Site Search: in


	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: Perl Programming Help: Advanced:
parse perl code? wanna get all variables from perl code

mrstupid
Novice

Sep 14, 2010, 7:24 AM

Post #1 of 7 (1544 views)

parse perl code? wanna get all variables from perl code	Can't Post

hello, all,

I have this program which needs to get variables defined in a piece of Perl code.
Given the complexity of Perl grammar, I found this really hard.
Does anyone know how to make this possible?
I want to read the source code of perl compiler which may give me some help, is lib/B/Deparse.pm wher I should get to start?

lots of thanks!

In Reply To

shawnhcorey
Enthusiast

Sep 14, 2010, 8:48 AM

Post #2 of 7 (1539 views)

Re: [mrstupid] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

Try:

Code

perl -MO=Xref,-r myscript.pl

__END__

I love Perl; it's the only language where you can bless your thingy.

Perl documentation is available at perldoc.perl.org. The list of standard modules and pragmatics is available in perlmodlib.

Get Markup Help. Please note the markup tag of "code".

mrstupid
Novice

Sep 14, 2010, 7:07 PM

Post #3 of 7 (1527 views)

Re: [shawnhcorey] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

that's really helpful, thanks!!!

shawnhcorey
Enthusiast

Sep 14, 2010, 7:11 PM

Post #4 of 7 (1524 views)

Re: [mrstupid] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

I forgot to add:

See `perldoc B::Xref`.

__END__

I love Perl; it's the only language where you can bless your thingy.

Perl documentation is available at perldoc.perl.org. The list of standard modules and pragmatics is available in perlmodlib.

Get Markup Help. Please note the markup tag of "code".

mrstupid
Novice

Sep 14, 2010, 11:07 PM

Post #5 of 7 (1521 views)

Re: [shawnhcorey] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

yes, I am reading it.
Although sometime Xref cannot work properly, like it cannot parse the Object method call properly, I think can solve my problem.
Thanks again!

rovf
Veteran

Sep 15, 2010, 1:10 AM

Post #6 of 7 (1519 views)

Re: [mrstupid] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

Quote

Although sometime Xref cannot work properly

The *general* problem is not solvable anyway, because variable names can also be created at runtime.

shawnhcorey
Enthusiast

Sep 15, 2010, 6:01 AM

Post #7 of 7 (1507 views)

Re: [rovf] parse perl code? wanna get all variables from perl code [In reply to]	Can't Post

In Reply To

The *general* problem is not solvable anyway, because variable names can also be created at runtime.

That's generally considered a bad idea. Symbolic references, especially ones created by the user, can get you into trouble. Use a hash instead.

See `perldoc perlref` and search for /Symbolic references/.

__END__

I love Perl; it's the only language where you can bless your thingy.

Perl documentation is available at perldoc.perl.org. The list of standard modules and pragmatics is available in perlmodlib.

Get Markup Help. Please note the markup tag of "code".

Search for (options)

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives