Is there an idiomatic way to pass a Regex from the command line to a Raku program. The following code accomplishes what I’m trying to do but it has a few issues (see below).

#!/bin/raku

use MONKEY-TYPING;
augment class Str {
  method Regex { 
    my $tmp = self.Str;
    return rx/ <$tmp> /;
  }
}

sub MAIN (Regex(Str) $sample) {
  if ( "hello world" ~~ $sample ) {
    say "hello world";
  }
}

Issues

1. This changes the default Str class which may cause unexpected behavior down the road.
2. Regexes passed to this work but sometimes act strange. For example:

this works:

$ ./cliRegex.raku '.*'
hello world

this does not work:

$ ./cliRegex.raku .*
Usage:
  ./cliRegex.raku <sample>