Re^3: Ruby vs Perl vs LISP; the killer feature lacking in Ruby

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in reply to Re^2: Ruby vs Perl vs LISP; the killer feature lacking in Ruby
in thread Ruby vs Perl vs LISP; the killer feature lacking in Ruby

As well as Jenda's suggestion, it's also possible to declare a little wrapper like this:

sub also (&;@) {
  return @_;
}

Enabling you to do this:

multifoo { $_ * 2 }
    also { foo($_) }
         @things;

This is what Moose does for its type constraints system, providing little wrappers like via, where and message so you can write code like:

subtype 'ModernDateTime'
   => as 'DateTime'
   => where { $_->year() >= 1980 }
   => message { 'The date is not modern enough' };