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<?php |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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declare(strict_types=1); |
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namespace Spiral\Stempler\Lexer\Grammar\Dynamic; |
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use Spiral\Stempler\Lexer\Buffer; |
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use Spiral\Stempler\Lexer\Byte; |
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use Spiral\Stempler\Lexer\Grammar\Traits\TokenTrait; |
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use Spiral\Stempler\Lexer\GrammarInterface; |
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use Spiral\Stempler\Lexer\Token; |
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/** |
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* Provides ability to parse complex declare options. |
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*/ |
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final class DeclareGrammar implements GrammarInterface |
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{ |
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use TokenTrait; |
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public const TYPE_KEYWORD = 0; |
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public const TYPE_EQUAL = 1; |
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public const TYPE_COMMA = 2; |
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public const TYPE_QUOTED = 3; |
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// whitespace |
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private const REGEXP_WHITESPACE = '/\s/'; |
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/** @var array */ |
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private $keyword = []; |
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/** |
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* @inheritDoc |
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*/ |
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public function parse(Buffer $src): \Generator |
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{ |
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while ($n = $src->next()) { |
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switch ($n->char) { |
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case '"': |
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case "'": |
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if ($this->keyword !== []) { |
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yield $this->packToken($this->keyword, self::TYPE_KEYWORD); |
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$this->keyword = []; |
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} |
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$quoted[] = $n; |
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while ($nn = $src->next()) { |
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$quoted[] = $nn; |
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if ($nn instanceof Byte && $nn->char === $n->char) { |
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break; |
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} |
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} |
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yield $this->packToken($quoted, self::TYPE_QUOTED); |
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$quoted = []; |
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break; |
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case '=': |
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if ($this->keyword !== []) { |
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yield $this->packToken($this->keyword, self::TYPE_KEYWORD); |
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$this->keyword = []; |
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} |
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yield new Token(self::TYPE_EQUAL, $n->offset, '='); |
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break; |
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case ',': |
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if ($this->keyword !== []) { |
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yield $this->packToken($this->keyword, self::TYPE_KEYWORD); |
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$this->keyword = []; |
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} |
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yield new Token(self::TYPE_COMMA, $n->offset, ','); |
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break; |
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default: |
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if (preg_match(self::REGEXP_WHITESPACE, $n->char)) { |
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if ($this->keyword !== []) { |
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yield $this->packToken($this->keyword, self::TYPE_KEYWORD); |
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$this->keyword = []; |
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} |
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break; |
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} |
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$this->keyword[] = $n; |
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} |
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} |
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if ($this->keyword !== []) { |
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yield $this->packToken($this->keyword, self::TYPE_KEYWORD); |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function tokenName(int $token): string |
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{ |
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switch ($token) { |
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case self::TYPE_KEYWORD: |
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return 'DECLARE:KEYWORD'; |
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case self::TYPE_EQUAL: |
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return 'DECLARE:EQUAL'; |
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case self::TYPE_COMMA: |
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return 'DECLARE:COMMA'; |
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case self::TYPE_QUOTED: |
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return 'DECLARE:QUOTED'; |
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default: |
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return 'DECLARE:UNDEFINED'; |
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} |
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} |
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} |
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spiral /
framework
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