File Coverage

blib/lib/Sort/Sub/by_perl_op.pm

Criterion	Covered	Total	%
statement	23	26	88.4
branch	6	10	60.0
condition			n/a
subroutine	6	7	85.7
pod	0	2	0.0
total	35	45	77.7

package Sort::Sub::by_perl_op;

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2020-02-28'; # DATE
our $DIST = 'Sort-Sub'; # DIST
our $VERSION = '0.118'; # VERSION

use 5.010;
use strict;
use warnings;

sub meta {
    return {
        v => 1,
        summary => 'Sort by Perl operator',
        args => {
            op => {
                schema => ['str*', in=>['cmp', '<=>']],
                req => 1,
            },
        },
    };
}
sub gen_sorter {
    my ($is_reverse, $is_ci, $args) = @_;

    my $op = $args->{op};
    die "Please supply sorter argument 'op'"
        unless defined $op;

    my $code_str = "sub { \$_[0] $op \$_[1] }";
    my $code_cmp = eval $code_str;
    die "Can't compile $code_str: $@" if $@;

    sub {
        no strict 'refs';

        my $caller = caller();
        my $a = @_ ? $_[0] : ${"$caller\::a"};
        my $b = @_ ? $_[1] : ${"$caller\::b"};

        my $cmp = $code_cmp->($a, $b);
        $is_reverse ? -1*$cmp : $cmp;
    };
}

1;
# ABSTRACT: Sort by Perl operator

__END__