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<?php declare(strict_types=1); |
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|
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namespace PhpParser\Parser; |
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|
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use PhpParser\Error; |
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use PhpParser\ErrorHandler; |
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use PhpParser\Parser; |
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|
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class Multiple implements Parser |
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{ |
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/** @var Parser[] List of parsers to try, in order of preference */ |
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private $parsers; |
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|
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/** |
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* Create a parser which will try multiple parsers in an order of preference. |
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* |
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* Parsers will be invoked in the order they're provided to the constructor. If one of the |
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* parsers runs without throwing, it's output is returned. Otherwise the exception that the |
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* first parser generated is thrown. |
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* |
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* @param Parser[] $parsers |
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*/ |
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public function __construct(array $parsers) { |
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$this->parsers = $parsers; |
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} |
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|
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public function parse(string $code, ?ErrorHandler $errorHandler = null) { |
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if (null === $errorHandler) { |
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$errorHandler = new ErrorHandler\Throwing; |
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} |
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|
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list($firstStmts, $firstError) = $this->tryParse($this->parsers[0], $errorHandler, $code); |
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if ($firstError === null) { |
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return $firstStmts; |
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} |
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|
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for ($i = 1, $c = count($this->parsers); $i < $c; ++$i) { |
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list($stmts, $error) = $this->tryParse($this->parsers[$i], $errorHandler, $code); |
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if ($error === null) { |
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return $stmts; |
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} |
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} |
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|
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throw $firstError; |
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} |
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|
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private function tryParse(Parser $parser, ErrorHandler $errorHandler, $code) { |
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$stmts = null; |
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$error = null; |
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try { |
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$stmts = $parser->parse($code, $errorHandler); |
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} catch (Error $error) {} |
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return [$stmts, $error]; |
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} |
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} |
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