File Coverage

blib/lib/Range/Iter.pm

Criterion	Covered	Total	%
statement	27	27	100.0
branch	15	16	93.7
condition	4	5	80.0
subroutine	6	6	100.0
pod	1	1	100.0
total	53	55	96.3

package Range::Iter;

our $DATE = '2019-04-16'; # DATE
our $VERSION = '0.001'; # VERSION

use strict;
use warnings;

use Exporter qw(import);
our @EXPORT_OK = qw(range_iter);

my $re_num = qr/\A[+-]?[0-9]+(\.[0-9]+)?\z/;

sub range_iter($$;$) {
    my ($start, $end, $step) = @_;
    $step //= 1;

    my $value = $start;
    my $ended;

    if ($start =~ $re_num && $end =~ $re_num) {
        # numeric version
        $ended++ if $value > $end;
        sub {
            $ended++ if $value > $end;
            return undef if $ended;
            my $old = $value;
            $value+=$step;
            return $old;
        };
    } else {
        die "Cannot specify step != 1 for non-numeric range" if $step != 1;
        $ended++ if $value gt $end;
        sub {
            return undef if $ended;
            $ended++ if $value ge $end;
            $value++;
        };
    }
}

1;
# ABSTRACT: Generate a coderef iterator for range

__END__