package DTL::Fast::Expression::Operator::Binary::Pow;
use strict;
use utf8;
use warnings FATAL => 'all';
use parent 'DTL::Fast::Expression::Operator::Binary';

$DTL::Fast::OPS_HANDLERS{'**'} = __PACKAGE__;
$DTL::Fast::OPS_HANDLERS{pow} = __PACKAGE__;

use Scalar::Util qw(looks_like_number);

sub dispatch
{
    my ( $self, $arg1, $arg2, $context) = @_;
    my ($arg1_type, $arg2_type) = (ref $arg1, ref $arg2);
    my $result = 0;

    if (looks_like_number($arg1) and looks_like_number($arg2))
    {
        $result = ($arg1 ** $arg2);
    }
    elsif (UNIVERSAL::can($arg1, 'pow'))
    {
        $result = $arg1->pow($arg2);
    }
    else
    {
        die $self->get_render_error(
                $context,
                sprintf(
                    "don't know how to involute %s (%s) to power of %s (%s)"
                    , $arg1 // 'undef'
                    , $arg1_type || 'SCALAR'
                    , $arg2 // 'undef'
                    , $arg2_type || 'SCALAR'
                )
            );
    }

    return $result;
}

1;