loophp\collection\Operation\Plus

Complexity

Total Complexity

1

Size/Duplication

Total Lines	35
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	1

1 Method

Rating	Name	Duplication	Size	Complexity
A	__invoke()	0	27	1

<?php

declare(strict_types=1);

namespace loophp\collection\Operation;

use Closure;
use Generator;
use loophp\iterators\ConcatIterableAggregate;

/**
 * @immutable
 *
 * @template TKey
 * @template T
 */
final class Plus extends AbstractOperation
{
    /**
     * @template UKey
     * @template U
     *
     * @return Closure(iterable<UKey, U>): Closure(iterable<TKey, T>): iterable<int|TKey|UKey, T|U>
     */
    public function __invoke(): Closure
    {
        $comparatorCallback =
            /**
             * @param T $left
             *
             * @return Closure(T): bool
             */
            static fn (mixed $left): Closure =>
                /**
                 * @param T $right
                 */
                static fn (mixed $right): bool => $left === $right;

        return
            /**
             * @param iterable<UKey, U> $items
             *
             * @return Closure(iterable<TKey, T>): iterable<int|TKey|UKey, T|U>
             */
            static fn (iterable $items): Closure =>
                /**
                 * @param iterable<TKey, T> $iterable
                 *
                 * @return Generator<int|TKey|UKey, T|U>
                 */
                static fn (iterable $iterable): Generator => yield from (new Distinct())()($comparatorCallback)(static fn (mixed $value, mixed $key): mixed => $key)(new ConcatIterableAggregate([$iterable, $items]));
    }
}