Package introspection

FloydATC has asked for the wisdom of the Perl Monks concerning the following question:

Given a package name, is it possible to somehow get a list of all the subs that exist within that package?

I know I can check for a given sub like this
$sub = $obj->can("print");
but what I'd like is something like
@subnames = $obj->can(); # Just to illustrate, does not work
or even
@subnames = Some::Class::can(); # Just to illustrate, does not work

-- Time flies when you don't know what you're doing

Comment on Package introspection Select or Download Code

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Re: Package introspection by jau (Hermit) on Jul 17, 2010 at 11:17 UTC
You could use Class::Inspector, for example. `$function_names = Class::Inspector->functions( 'My::Class' );` [download] Or: `$method_names = Class::Inspector->methods( 'My::Class' );` [download]	[reply] [d/l] [select]
Re^2: Package introspection by FloydATC (Deacon) on Jul 17, 2010 at 11:29 UTC
Exactly what I was looking for, thank you :-D -- Time flies when you don't know what you're doing	[reply]
Re: Package introspection by JavaFan (Canon) on Jul 17, 2010 at 09:51 UTC
`@subnames = grep {Test->can($_)} keys %Test::;` [download] Although that gets tricky (both false positives and false negatives) in the face of inheritance. (But then, so does your use of `can`).	[reply] [d/l] [select]
Re: Package introspection by chromatic (Archbishop) on Jul 17, 2010 at 22:14 UTC
In Moose this is something like: `my @methods = $obj->meta->get_all_methods();`	[reply] [d/l]
Re: Package introspection by morgon (Priest) on Jul 18, 2010 at 07:10 UTC
You can also check the symbol table (you won't get any inherited methods then, which may or may not be what you want). For a package "Hubba", the symbol table can be found in %Hubba:: (the keys of this hash are the symbols) and the subroutines are in the CODE-slot. So you find all subs defined in a package $package you can simply grep for all symbols that have a defined CODE-slot like this ugly hack: `my @sub_names = grep { defined *{"${package}::$_"}{CODE} } keys %{"${p +ackage}::"}` [download]	[reply] [d/l]
Re^2: Package introspection by FloydATC (Deacon) on Jul 19, 2010 at 05:00 UTC
I'll use Class::Inspector for now as it looks a lot cleaner, but this is good to know and I bet this is exactly how that class works too. -- Time flies when you don't know what you're doing	[reply]
Re: Package introspection by exussum0 (Vicar) on Jul 18, 2010 at 11:34 UTC
Class::Mop is my hammer now-a-days.	[reply]


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