x-perl-expand-signature

#!/usr/bin/env perl
# 
# Expand Method::Signatures declarations to the pure perl version
#
# A minor syntax error inside a method or a func is hard to debug. This
# snippet accepts the method or func declaration on stdin and outputs
# the corresponding perl to stdout.
#
# Pedro Melo (c) 2011 <melo@simplicidade.org>
# 

use strict;
use warnings;

my $decl = do { local $\; <> };
my ($name) = $decl =~ m/\s*(?:method|func)\s+(\S+?)?\s*\(/;
$name = '' unless $name;

my $script = <<"EOS";
  use Method::Signatures;

  BEGIN {
    no warnings;
    *Method::Signatures::DEBUG = sub {
      my (\$code) = \@_;
      return unless \$code =~ s/^inject: //;
      
      print "sub $name { \$code";
    }
  }

  $decl
  }
EOS

eval $script;