Took me a little while, cause I am no closures and eval hero, but here is the trick...

This is the script holding your routines:

sub hello { 
  return "Hello"; 
} 
 
sub world { 
  return "world!"; 
} 
 
sub foo_bar { 
  my ($foo, $bar) = @_; 
  print "$foo $bar\n"; 
}
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And this is the interpreter.

 
use strict; 
 
# Try to load code from a different perl script. Put it in a closure
# and run run run... 
 
my $load_file = $ARGV[0]; 
 
# $flags 
my $in = 0; 
my @subs = (); 
my %routines = (); 
my %sub = (); 
 
open(IN, "<$load_file"); 
while (<IN>) { 
  if ( /sub (\w+) \{/ ) { 
    # hey! A routine has begun... 
    $in = 1; 
    push @subs,$1; 
    $routines{$1} = ""; 
  } 
  if ( $in == 1 ) { 
    if ( /\}/ ) { 
      # sub ends. 
      $in = 0; 
    } else { 
      s/^\s+//g; 
      $routines{$subs[$#subs]} .= $_ unless /sub/; 
    } 
  } 
} 
close(IN); 
 
# mmm - we now have the internals of the routines in core. 
# let's see what we can do with them. 
 
print "You have these subs:\n"; 
foreach my $subs (keys %routines) { 
  eval("\$sub{$subs} = sub { " . $routines{$subs} . " };"); 
  print "\$sub{$subs} = sub { " . $routines{$subs} . " };\n" 
} 
 
$sub{'foo_bar'}->($sub{'hello'}->(), $sub{'world'}->()),"\n";
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To be honest with you - I am kind of proud of myself *blush blush*

A righthanded-lefthand....
"Field experience is something you don't get until just after you need it."