xref: /plugin/combo/vendor/antlr/antlr4-php-runtime/src/Utils/BitSet.php (revision 37748cd8654635afbeca80942126742f0f4cc346)

<?php

declare(strict_types=1);

namespace Antlr\Antlr4\Runtime\Utils;

use Antlr\Antlr4\Runtime\Comparison\Hasher;

final class BitSet
{
    /** @var array<mixed> */
    private $data = [];

    public function add(int $value) : void
    {
        $this->data[$value] = true;
    }

    public function or(BitSet $set) : void
    {
        $this->data += $set->data;
    }

    public function remove(int $value) : void
    {
        unset($this->data[$value]);
    }

    public function contains(int $value) : bool
    {
        return \array_key_exists($value, $this->data);
    }

    /**
     * @return array<mixed>
     */
    public function values() : array
    {
        return \array_keys($this->data);
    }

    /**
     * @return mixed
     */
    public function minValue()
    {
        return \min($this->values());
    }

    public function hashCode() : int
    {
        return Hasher::hash(...$this->values());
    }

    public function equals(object $other) : bool
    {
        if ($this === $other) {
            return true;
        }

        return $other instanceof self
            && $this->data === $other->data;
    }

    public function length() : int
    {
        return \count($this->data);
    }

    public function __toString() : string
    {
        return \sprintf('{%s}', \implode(', ', $this->values()));
    }
}