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<?php
declare(strict_types=1);
namespace Remorhaz\UniLex\Stack;
use Remorhaz\UniLex\Exception;
class SymbolStack implements PushInterface
{
/**
* @var StackableSymbolInterface[]
*/
private $data = [];
* @return StackableSymbolInterface
* @throws Exception
public function pop(): StackableSymbolInterface
if (empty($this->data)) {
throw new Exception("Unexpected end of stack");
}
return array_pop($this->data);
public function push(StackableSymbolInterface ...$symbolList): void
if (empty($symbolList)) {
return;
array_push($this->data, ...array_reverse($symbolList));
public function isEmpty(): bool
return empty($this->data);
public function reset(): void
$this->data = [];
remorhaz /
php-unilex
