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<?php |
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namespace Xiag\Rql\Parser; |
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use Xiag\Rql\Parser\Exception\SyntaxErrorException; |
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class Lexer |
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{ |
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/** |
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* @var SubLexerInterface |
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*/ |
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protected $subLexer; |
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/** |
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* @param SubLexerInterface $subLexer |
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*/ |
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public function __construct(SubLexerInterface $subLexer = null) |
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{ |
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$this->subLexer = $subLexer ?: static::createDefaultSubLexer(); |
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} |
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/** |
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* @param SubLexerInterface $subLexer |
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* @return $this |
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* @codeCoverageIgnore |
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*/ |
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public function setSubLexer(SubLexerInterface $subLexer) |
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{ |
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$this->subLexer = $subLexer; |
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return $this; |
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} |
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/** |
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* @return SubLexerInterface |
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* @codeCoverageIgnore |
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*/ |
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public function getSubLexer() |
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{ |
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return $this->subLexer; |
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} |
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/** |
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* @return SubLexerInterface |
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*/ |
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public static function createDefaultSubLexer() |
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{ |
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return (new SubLexerChain()) |
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->addSubLexer(new SubLexer\ConstantSubLexer()) |
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->addSubLexer(new SubLexer\PunctuationSubLexer()) |
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->addSubLexer(new SubLexer\FiqlOperatorSubLexer()) |
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->addSubLexer(new SubLexer\RqlOperatorSubLexer()) |
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->addSubLexer(new SubLexer\TypeSubLexer()) |
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->addSubLexer(new SubLexer\GlobSubLexer()) |
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->addSubLexer(new SubLexer\StringSubLexer()) |
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->addSubLexer(new SubLexer\DatetimeSubLexer()) |
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->addSubLexer(new SubLexer\NumberSubLexer()) |
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->addSubLexer(new SubLexer\SortSubLexer()); |
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} |
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/** |
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* @param string $code |
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* @return TokenStream |
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* @throws SyntaxErrorException |
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*/ |
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public function tokenize($code) |
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{ |
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$end = strlen($code); |
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$cursor = 0; |
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$tokens = []; |
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while ($cursor < $end) { |
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$token = $this->subLexer->getTokenAt($code, $cursor); |
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if ($token === null) { |
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throw new SyntaxErrorException( |
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sprintf( |
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'Invalid character "%s" at position %d', |
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$code[$cursor], |
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$cursor |
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) |
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); |
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} |
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$tokens[] = $token; |
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$cursor = $token->getEnd(); |
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} |
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$tokens[] = new Token(Token::T_END, '', $cursor, $cursor); |
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return new TokenStream($tokens); |
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} |
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} |
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xiag-ag /
rql-parser
