loophp / collection

src/Operation/Compact.php

<?php

declare(strict_types=1);

namespace loophp\collection\Operation;

use Closure;
use Generator;

use function in_array;

/**
 * @immutable
 *
 * @template TKey
 * @template T
 */
final class Compact extends AbstractOperation
{
    /**
     * @return Closure(array<T>): Closure(iterable<TKey, T>): Generator<TKey, T>
     */
    public function __invoke(): Closure
    {
        return
            /**
             * @param array<T> $values
             *
             * @return Closure(iterable<TKey, T>): Generator<TKey, T>
             */
            static function (array $values): Closure {
                $filterCallback =
                    /**
                     * @param non-empty-array<int, (null|array|int|bool|string|T)> $values

The doc comment non-empty-array<int, (null|array|int|bool|string|T)> at position 0 could not be parsed: Unknown type name 'non-empty-array' at position 0 in non-empty-array<int, (null|array|int|bool|string|T)>.

                     */
                    static fn (array $values): Closure =>
                        /**
                         * @param T $value
                         */
                        static fn (mixed $value): bool => !in_array($value, $values, true);

                return (new Filter())()(
                    $filterCallback(
                        [] === $values ?
                            Nullsy::VALUES :
                            $values
                    )
                );
            };
    }
}