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<?php |
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/** |
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* This file is part of Railt package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Railt\SDL; |
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use Psr\Log\LoggerAwareInterface; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\LoggerInterface; |
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use Railt\Io\Readable; |
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use Railt\Parser\Ast\RuleInterface; |
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use Railt\Parser\Exception\UnexpectedTokenException; |
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use Railt\Parser\Exception\UnrecognizedTokenException; |
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use Railt\SDL\Exception\CompilerException; |
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use Railt\SDL\Exception\SyntaxException; |
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use Railt\SDL\Frontend\Builder; |
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use Railt\SDL\Frontend\Parser; |
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/** |
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* Class Frontend |
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*/ |
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class Frontend implements LoggerAwareInterface |
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{ |
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use LoggerAwareTrait; |
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/** |
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* @var Parser |
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*/ |
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private $parser; |
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/** |
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* @var Builder |
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*/ |
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private $builder; |
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/** |
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* Frontend constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->parser = new Parser(); |
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$this->builder = new Builder(); |
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} |
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/** |
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* @param Readable $readable |
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* @return mixed|null |
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* @throws SyntaxException |
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* @throws CompilerException |
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* @throws \LogicException |
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*/ |
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public function load(Readable $readable): iterable |
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{ |
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$ast = $this->parse($readable); |
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yield $this->builder->reduce($readable, $ast); |
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} |
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/** |
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* Parse the file using top-down parser and |
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* return the Abstract Syntax Tree. |
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* |
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* @param Readable $file |
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* @return RuleInterface |
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* @throws SyntaxException |
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*/ |
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private function parse(Readable $file): RuleInterface |
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{ |
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try { |
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return $this->parser->parse($file); |
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} catch (UnexpectedTokenException | UnrecognizedTokenException $e) { |
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$error = new SyntaxException($e->getMessage(), $e->getCode()); |
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$error->throwsIn($file, $e->getLine(), $e->getColumn()); |
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throw $error; |
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} |
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} |
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/** |
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* @param LoggerInterface $logger |
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* @return Frontend |
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*/ |
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public function setLogger(LoggerInterface $logger): self |
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{ |
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$this->logger = $logger; |
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return $this; |
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} |
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} |
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railt /
sdl
