Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I am using this code (which was inspired by Devel::Symdump) to get from coderef to name in my attribute handlers:
# code for this inspired by Devel::Symdump sub _find_name_of_sub_in_pkg{ my ($ref, $pkg) = @_; no strict 'refs'; #return *{$ref}{NAME} if ref $ref eq 'GLOB'; while (my ($key,$val) = each(%{*{"$pkg\::"}})) { local(*ENTRY) = $val; if (defined $val && defined *ENTRY{CODE}) { next unless *ENTRY{CODE} eq $ref; # rewind "each" my $a = scalar keys %{*{"$pkg\::"}}; return $key; } } die "failed to find name for StartRunmode code ref $ref in package + $pkg\n"; }
This only works if you know which package you are looking at, but I think in your case, you do.

Update: Another major catch is that depending on which phase the handler runs, the subroutine will not yet be installed in the symbol table, so there is no name yet. Attribute::Handlers I think allows you to run at CHECK, when it may work. Maybe. Attributes are not for the faint of heart.

Update 2: I probably managed to confuse not only myself by now, but have a look at this:

use strict; package Beth; use Attribute::Handlers; sub print_name { my ($package, $symbol, $referent, $attr, $data, $phase, $filename, $linenum) = @_; if (ref $symbol eq 'GLOB'){ print *{$symbol}{NAME}; } print "\n"; } sub Lion :ATTR(CODE,BEGIN) { print_name(@_); } sub Tiger :ATTR(CODE,CHECK) { print_name(@_); } sub bar : Lion { print "pling.\n"; } sub foo : Tiger { print "pling.\n"; }
The CHECK phase attribute can print the name by just looking at the GLOB it gets, whereas it is still anonymous for the BEGIN attribute. Not sure how to write anything except BEGIN handlers without Attribute::Handlers (only with plain MODIFY_CODE_ATTRIBUTES).

In reply to Re: Is there a way to access the name under which a subroutine was first defined? by Thilosophy
in thread Is there a way to access the name under which a subroutine was first defined? by ELISHEVA

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (6)
    As of 2020-10-23 11:33 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      My favourite web site is:












      Results (238 votes). Check out past polls.

      Notices?