Re: How to get function's name inside of CODE attribute

You can't always get a name (as attributes can apply to anonymous functions), but Sub::Information can help:

use 5.014;

use Sub::Information;
use Attribute::Lexical 'CODE:FOO' => \&handle_foo_attr;

sub handle_foo_attr
{
    my ($func, $identifier, $attrs, $caller) = @_;
    my $info = Sub::Information->new( $func );
    my $name = $info->name;

    say "Function '$name' has FOO attribute";
}
[download]

I added in Attribute::Lexical to avoid the need to monkeypatch UNIVERSAL.

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Re^2: How to get function's name inside of CODE attribute (monkey see) by tye (Sage) on Oct 05, 2011 at 18:40 UTC
I added in Attribute::Lexical to avoid the need to monkeypatch `UNIVERSAL`. You don't have to read much of the code before you get to: `unshift @UNIVERSAL::ISA, "Attribute::Lexical::UNIVERSAL";` [download] So, this module avoids adding methods to UNIVERSAL (I assume), but adding a super class after the fact is certainly also monkey patching. (Yes, I actually implement attributes without monkey patching UNIVERSAL at all and much more simply and, IMHO, sanely and buttoning that up for CPAN is on my to-do list.) - tye	[reply] [d/l]
Re^3: How to get function's name inside of CODE attribute (monkey see) by stvn (Monsignor) on Oct 05, 2011 at 19:29 UTC
Yes, I actually implement attributes without monkey patching UNIVERSAL at all and much more simply and, IMHO, sanely and buttoning that up for CPAN is on my to-do list. Is the code sane enough for github? or some other public code hosting site? I would like to see this. -stvn	[reply]
Re^4: How to get function's name inside of CODE attribute (monkey see) by tye (Sage) on Oct 05, 2011 at 19:44 UTC
Actually, much of the code is included in Devel::Init. After the __END__ line is even the code I decided to leave out of Devel::Init that tries to provide compatibility with the first entrant, Attribute::Handlers. No, Devel::Init is not a tool for enabling developers to easily define their own attributes. But the code in Devel::Init only requires small additions and minor reworking for it to become that. - tye	[reply]
Re^3: How to get function's name inside of CODE attribute by chromatic (Archbishop) on Oct 05, 2011 at 20:06 UTC
I'm no fan of that myself, but it's less troublesome than putting all handlers in `UNIVERSAL`. I'll happily switch to a better solution that avoids modifying global behavior altogether. Improve your skills with Modern Perl: the free book.	[reply] [d/l]
Re^2: How to get function's name inside of CODE attribute by menth0l (Monk) on Oct 06, 2011 at 08:14 UTC
Using Sub::Information didn't help me. It works fine under 5.12 but has the same effect on 5.10 as in my previous example, i.e. `$info->name` returns empty string.	[reply] [d/l]