I'm trying to get familiar with verilog::preproc and so I took the example code and it worked just great. Then I decided that I wanted to try out a callback because the example doesn't do what I need, but then I realized, I don't know how callback work in perl. I kind of expected that relative to a class, that I was basically just making an override, or something that called the original plus something additional. Having said, that....I still don't know what I am doing... so I ask you. Below is the example plus two what I believe are callback functions supported by verilog::preproc. I kind of expected I would see these prints going off as read through some verilog lines. My guess is that the callbacks need to be reference to $vp somehow, but I am sure how to do appropriately. Any pointers to relevant tutorials or assistance is appreciated. 

#!/usr/bin/perl
# This is a complete verilog pre-parser!
# For a command line version, see vppreproc
use Verilog::Getopt;
use Verilog::Preproc;
 
my $opt = new Verilog::Getopt;
@ARGV = $opt->parameter(@ARGV);
 
my $vp = Verilog::Preproc->new(options=>$opt,);
$vp->open(filename=>"../common/tiri_defines.vh");
while (defined (my $line = $vp->getline())) {
   print $line;
}

sub define {
   my $self = shift;
   my $defname = shift;
   my $value = shift;
   my $params = shift;

   print "defname = $defname\n";
   print "  value = $value\n";
   print " params = $params\n";
}

sub def_exists  {
   my $self = shift;
   my $defname = shift;
   print "DEF_EXISTS\n";
}

[download]

In reply to Verilog Preproc callbacks by richmaes

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, details, 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, summary, 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.