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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\Compiler\Grammar; |
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use Railt\Compiler\Grammar\Delegate\IncludeDelegate; |
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use Railt\Io\Readable; |
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use Railt\Lexer\Driver\NativeRegex; |
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use Railt\Lexer\LexerInterface; |
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use Railt\Parser\Ast\RuleInterface; |
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use Railt\Parser\Driver\Llk; |
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use Railt\Parser\Grammar; |
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use Railt\Parser\GrammarInterface; |
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use Railt\Parser\ParserInterface; |
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/** |
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* Class Reader |
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*/ |
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class Reader |
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{ |
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/** |
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* @var Readable |
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*/ |
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private $file; |
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/** |
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* @var ParserInterface |
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*/ |
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private $pp; |
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/** |
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* @var LexerInterface |
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*/ |
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private $lexer; |
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/** |
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* @var GrammarInterface |
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*/ |
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private $grammar; |
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/** |
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* Reader constructor. |
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* @param Readable $file |
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*/ |
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public function __construct(Readable $file) |
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{ |
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$this->file = $file; |
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$this->pp = new Parser(); |
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$this->lexer = new NativeRegex(); |
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$this->grammar = new Grammar(); |
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$this->boot(); |
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} |
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/** |
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* @return void |
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*/ |
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private function boot(): void |
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{ |
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$env = $this->pp->env(); |
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$env->share(LexerInterface::class, $this->lexer); |
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$env->share(GrammarInterface::class, $this->grammar); |
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$env->share(self::class, $this); |
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} |
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/** |
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* @return ParserInterface |
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* @throws \Railt\Io\Exception\ExternalFileException |
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* @throws \Railt\Io\Exception\NotReadableException |
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*/ |
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public function getParser(): ParserInterface |
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{ |
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$this->addGrammar($this->file); |
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return new Llk($this->lexer, $this->grammar); |
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} |
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/** |
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* @param Readable $file |
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* @throws \Railt\Io\Exception\ExternalFileException |
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* @throws \Railt\Io\Exception\NotReadableException |
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*/ |
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private function addGrammar(Readable $file): void |
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{ |
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$ast = $this->pp->parse($file); |
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foreach ($ast->getChildren() as $child) { |
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switch (true) { |
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case $child instanceof IncludeDelegate: |
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$this->addGrammar($child->getPathname($file)); |
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break; |
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} |
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} |
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} |
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} |
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railt /
compiler
