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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\Lexer\Driver\NativeStateful; |
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use Railt\Lexer\Result\Unknown; |
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/** |
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* Class PCRECompiler |
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*/ |
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class PCRECompiler |
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{ |
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/** |
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* Regex delimiter |
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*/ |
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protected const REGEX_DELIMITER = '/'; |
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private const FLAG_UNICODE = 'u'; |
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private const FLAG_DOT_ALL = 's'; |
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private const FLAG_ANALYZED = 'S'; |
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/** |
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* @var array|string[] |
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*/ |
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protected $tokens = []; |
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/** |
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* PCRECompiler constructor. |
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* @param array $tokens |
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*/ |
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public function __construct(array $tokens = []) |
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{ |
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$this->tokens = $tokens; |
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} |
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/** |
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* @param string $token |
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* @param string $pcre |
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* @return PCRECompiler |
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*/ |
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public function add(string $token, string $pcre): self |
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{ |
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$this->tokens[$token] = $pcre; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function compile(): string |
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{ |
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$tokens = \array_merge($this->tokens, [Unknown::T_NAME => '.*?']); |
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return $this->tokensToPattern($tokens); |
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} |
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/** |
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* @param iterable $tokens |
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* @return string |
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*/ |
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private function tokensToPattern(iterable $tokens): string |
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{ |
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$tokensList = []; |
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foreach ($tokens as $name => $pcre) { |
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$name = $this->escapeTokenName($name); |
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$value = $this->escapeTokenPattern($pcre); |
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$tokensList[] = \sprintf('(?P<%s>%s)', \trim($name), $value); |
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} |
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$pcre = \implode('|', $tokensList); |
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return \sprintf('%s\G%s%1$s%s', self::REGEX_DELIMITER, $pcre, $this->renderFlags()); |
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} |
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/** |
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* @param string $pattern |
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* @return string |
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*/ |
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protected function escapeTokenName(string $pattern): string |
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{ |
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return \preg_quote($pattern, static::REGEX_DELIMITER); |
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} |
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/** |
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* @param string $value |
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* @return string |
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*/ |
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protected function escapeTokenPattern(string $value): string |
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{ |
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return \str_replace(static::REGEX_DELIMITER, '\\' . self::REGEX_DELIMITER, $value); |
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} |
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/** |
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* @return string |
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*/ |
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private function renderFlags(): string |
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{ |
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return self::FLAG_UNICODE . self::FLAG_DOT_ALL . self::FLAG_ANALYZED; |
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} |
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/** |
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* @return array |
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*/ |
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public function getTokens(): array |
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{ |
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return $this->tokens; |
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} |
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} |
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railt /
lexer
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: