#!/usr/bin/perl
use strict;
use warnings;

my $module;
BEGIN {
    my $opt = $ARGV[0];
    $ENV{PERL_RL} = $opt || qw(Gnu Perl Zoid)[0]; # choose module 
    $module = $ENV{PERL_RL};
}
use Term::ReadLine;

my $term = Term::ReadLine->new('sample');
my $attribs = $term->Attribs;

completion_words('print', 'list', 'quit', 'run', 'status');

$term->readline("$module> ");

sub completion_words {
    my @basic_commands = @_;
    
    my $c_completion = sub  {
        my ($text, $line, $start) = @_;
        #return () if $start != 0; # only at start
        grep(/^$text/, @basic_commands);
    };
    
    $attribs->{completion_function} = $c_completion;
}