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<?php declare(strict_types=1);
/**
* @license http://opensource.org/licenses/mit-license.php MIT
* @link https://github.com/nicoSWD
* @author Nicolas Oelgart <[email protected]>
*/
namespace nicoSWD\Rule\Grammar;
use SplPriorityQueue;
abstract class Grammar
{
private string $compiledRegex = '';
/** @var Definition[] */
private array $tokens = [];
/** @return Definition[] */
abstract public function getDefinition(): array;
/** @return InternalFunction[] */
abstract public function getInternalFunctions(): array;
/** @return InternalMethod[] */
abstract public function getInternalMethods(): array;
public function buildRegex(): string
if (!$this->compiledRegex) {
$this->registerTokens();
$regex = [];
foreach ($this->getQueue() as $token) {
$regex[] = "(?<{$token->token->value}>{$token->regex})";
}
$this->compiledRegex = '~(' . implode('|', $regex) . ')~As';
return $this->compiledRegex;
private function getQueue(): SplPriorityQueue
$queue = new SplPriorityQueue();
foreach ($this->tokens as $token) {
$queue->insert($token, $token->priority);
return $queue;
private function registerTokens(): void
foreach ($this->getDefinition() as $definition) {
$this->tokens[$definition->token->value] = $definition;
nicoSWD /
php-rule-parser
