#!/bin/perl -w
use strict;
use File::Find;

# create various wnated functions
my $wanted= make_wanted( \&wanted_1, 'toto', 'tata');
find( $wanted, '.');
print "\n";

$wanted= make_wanted( \&wanted_1, 'foo',  'bar', 'baz');
find( $wanted, '.');
print "\n";

$wanted= make_wanted( \&wanted_2, 'toto', 'tata');
find( $wanted, '.');
print "\n";

$wanted= make_wanted( \&wanted_2, 'foo',  'bar', 'baz');
find( $wanted, '.');
print "\n";

# a regular function, can access its arguments and the File::Find variables

sub wanted_1
  { my @args= @_;
    print "wanted_1( ", join( ', ', @args), ") on $_\n" if( m/\.xml$/);
  }

sub wanted_2
  { my @args= @_;
    print "wanted_2( ", join( ', ', @args), ") on $_\n" if( m/\.txt$/);
  }

# the closure generator
# creates a function that calls the function passed as first argument
# passing it the arguments make_wanted is called with

sub make_wanted
  { my $wanted= shift;                      # get the "real" wanted function
    my @args= @_;                           # "freeze" the arguments
    my $sub= sub { $wanted->( @args);  };   # generate the anon sub
    return $sub;                            # return it
  }