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