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lib/App/Getconf.pm  view on Meta::CPAN

Option specifying a string, with check specified as function (code ref).

Subroutine will have C<$_> set to value to check, and the value will be the
only argument (C<@_>) passed.

Subroutine should return C<TRUE> when option value should be accepted,
C<FALSE> otherwise.

=cut

sub opt_sub(&) {
  my ($sub) = @_;

  return opt { check => $sub };
}

=item C<opt_enum ["first", ...]>

Option specifying a string. The string must be one of the specified in the
array.