use strict;
use warnings;
use feature qw( say );

use Inline C => <<'__EOI__';

SV* coderef2name(CV* cv) {
   const GV *   const gv        = CvGV(cv);
   const HV *   const stash     = GvSTASH(gv);
   const char * const pkg_name  = HvNAME(stash);
   const char * const func_name = GvNAME(gv);
   SV *         const fqn       = newSVpvn("", 0);

   sv_catpv(fqn, pkg_name);
   sv_catpv(fqn, "::");
   sv_catpv(fqn, func_name);

   return fqn;  // Mortalised by Inline
}

__EOI__

sub f {}

say coderef2name(\&f);

[download]

In reply to Re^3: How to de-reference a coderef? (B tricks) by ikegami
in thread How to de-reference a coderef? by AndyH

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.