It seems to me that you basically want something like App::Sequence. You could look at how it does what it does. Personally, I'd use a separate namespace for all user commands, but you can also use the main:: namespace and call the functions in it:

#!perl -w
use strict;

sub hello { print "Hello $_\n" for @_ };
sub bye { print "Goodbye $_\n" for @_ };

my $namespace = \%main::;

my ($command,@args) = @ARGV;
if (! exists $namespace->{$command}) {
    warn "Unknown command '$command'. Valid commands are:\n";
    for (sort keys %$namespace) {
        if (defined *{$namespace->{$_}}{CODE}) {
            warn "$_\n";
        };
    };
    die "$0 stopped.\n";
} else {
    my $code = $namespace->{$command};
    $code->(@args);
};

__END__

Q:\>perl -w tmp.pl x
Unknown command 'x'. Valid commands are:
bye
hello
tmp.pl stopped.

Q:\>perl -w tmp.pl hello Foo
Hello Foo

Q:\>perl -w tmp.pl bye Foo
Goodbye Foo

Q:\>

[download]

In reply to Re: dynamic perl calls by Corion
in thread dynamic perl calls by Anonymous Monk

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.