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<?php |
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declare(strict_types=1); |
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namespace Antlr\Antlr4\Runtime\Utils; |
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use Antlr\Antlr4\Runtime\Comparison\DefaultEquivalence; |
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use Antlr\Antlr4\Runtime\Comparison\Equatable; |
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use Antlr\Antlr4\Runtime\Comparison\Equivalence; |
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use Antlr\Antlr4\Runtime\Comparison\Hashable; |
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final class Map implements Equatable, \Countable, \IteratorAggregate |
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{ |
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/** @var array<int, array<array<Hashable, mixed>>> */ |
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private $table = []; |
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/** @var int */ |
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private $size = 0; |
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/** @var Equivalence */ |
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private $equivalence; |
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public function __construct(?Equivalence $equivalence = null) |
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{ |
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$this->equivalence = $equivalence ?? new DefaultEquivalence(); |
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} |
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public function count() : int |
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{ |
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return $this->size; |
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} |
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public function contains(Hashable $key) : bool |
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{ |
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$hash = $this->equivalence->hash($key); |
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if (!isset($this->table[$hash])) { |
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return false; |
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} |
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foreach ($this->table[$hash] as [$entryKey]) { |
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if ($this->equivalence->equivalent($key, $entryKey)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function get(Hashable $key) |
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{ |
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$hash = $this->equivalence->hash($key); |
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if (!isset($this->table[$hash])) { |
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return null; |
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} |
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foreach ($this->table[$hash] as [$entryKey, $entryValue]) { |
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if ($this->equivalence->equivalent($key, $entryKey)) { |
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return $entryValue; |
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} |
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} |
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return null; |
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} |
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/** |
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* @param mixed $value |
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*/ |
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public function put(Hashable $key, $value) : void |
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{ |
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$hash = $this->equivalence->hash($key); |
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if (!isset($this->table[$hash])) { |
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$this->table[$hash] = []; |
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} |
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foreach ($this->table[$hash] as $index => [$entryKey]) { |
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if ($this->equivalence->equivalent($key, $entryKey)) { |
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$this->table[$hash][$index] = [$key, $value]; |
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return; |
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} |
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} |
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$this->table[$hash][] = [$key, $value]; |
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$this->size++; |
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} |
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public function remove(Hashable $key) : void |
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{ |
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$hash = $this->equivalence->hash($key); |
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if (!isset($this->table[$hash])) { |
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return; |
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} |
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foreach ($this->table[$hash] as $index => [$entryKey]) { |
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if (!$this->equivalence->equivalent($key, $entryKey)) { |
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continue; |
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} |
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unset($this->table[$hash][$index]); |
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if (\count($this->table[$hash]) === 0) { |
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unset($this->table[$hash]); |
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} |
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$this->size--; |
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return; |
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} |
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} |
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public function equals(object $other) : bool |
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{ |
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if ($this === $other) { |
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return true; |
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} |
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if (!$other instanceof self |
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|| $this->size !== $other->size |
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|| !$this->equivalence->equals($other->equivalence)) { |
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return false; |
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} |
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foreach ($this->table as $hash => $bucket) { |
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if (!isset($other->table[$hash]) || \count($bucket) !== \count($other->table[$hash])) { |
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return false; |
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} |
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$otherBucket = $other->table[$hash]; |
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foreach ($bucket as $index => [$key, $value]) { |
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[$otherKey, $otherValue] = $otherBucket[$index]; |
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if (!$this->equivalence->equivalent($key, $otherKey) |
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|| !self::isEqual($value, $otherValue)) { |
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return false; |
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} |
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} |
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} |
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return true; |
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} |
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/** |
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* @return array<Hashable> |
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*/ |
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public function getKeys() : array |
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{ |
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$values = []; |
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foreach ($this->table as $bucket) { |
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foreach ($bucket as [$key]) { |
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$values[] = $key; |
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} |
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} |
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return $values; |
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} |
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/** |
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* @return array<mixed> |
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*/ |
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public function getValues() : array |
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{ |
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$values = []; |
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foreach ($this->table as $bucket) { |
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foreach ($bucket as [, $value]) { |
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$values[] = $value; |
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} |
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} |
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1 |
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return $values; |
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} |
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public function getIterator() : \Iterator |
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{ |
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foreach ($this->table as $bucket) { |
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foreach ($bucket as [$key, $value]) { |
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yield $key => $value; |
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} |
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} |
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} |
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private static function isEqual($left, $right) : bool |
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{ |
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if ($left instanceof Equatable && $right instanceof Equatable) { |
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return $left->equals($right); |
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} |
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return $left === $right; |
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} |
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} |
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SetBased /
antlr-php-runtime
