First commit

vendor/nikic/php-parser/lib/PhpParser/Parser/Multiple.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpParser\Parser;
+
+use PhpParser\Error;
+use PhpParser\ErrorHandler;
+use PhpParser\Parser;
+
+class Multiple implements Parser {
+    /** @var Parser[] List of parsers to try, in order of preference */
+    private $parsers;
+
+    /**
+     * 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 throwing, it's output is returned. Otherwise the exception that the
+     * first parser generated is thrown.
+     *
+     * @param Parser[] $parsers
+     */
+    public function __construct(array $parsers) {
+        $this->parsers = $parsers;
+    }
+
+    public function parse($code, ErrorHandler $errorHandler = null) {
+        if (null === $errorHandler) {
+            $errorHandler = new ErrorHandler\Throwing;
+        }
+
+        list($firstStmts, $firstError) = $this->tryParse($this->parsers[0], $errorHandler, $code);
+        if ($firstError === null) {
+            return $firstStmts;
+        }
+
+        for ($i = 1, $c = count($this->parsers); $i < $c; ++$i) {
+            list($stmts, $error) = $this->tryParse($this->parsers[$i], $errorHandler, $code);
+            if ($error === null) {
+                return $stmts;
+            }
+        }
+
+        throw $firstError;
+    }
+
+    private function tryParse(Parser $parser, ErrorHandler $errorHandler, $code) {
+        $stmts = null;
+        $error = null;
+        try {
+            $stmts = $parser->parse($code, $errorHandler);
+        } catch (Error $error) {}
+        return [$stmts, $error];
+    }
+}