Fork separate PHP 7 parser

Also add ParserInterface

grammar/rebuildParsers.php

@@ -1,10 +1,13 @@
 <?php
 
-$grammarFile           = __DIR__ . '/php5.y';
+$grammarToResultFile = [
+    __DIR__ . '/php5.y' => __DIR__ . '/../lib/PhpParser/Parser/Php5.php',
+    __DIR__ . '/php7.y' => __DIR__ . '/../lib/PhpParser/Parser/Php7.php',
+];
+
 $skeletonFile   = __DIR__ . '/kmyacc.php.parser';
 $tmpGrammarFile = __DIR__ . '/tmp_parser.phpy';
 $tmpResultFile  = __DIR__ . '/tmp_parser.php';
-$parserResultFile      = __DIR__ . '/../lib/PhpParser/Parser/Php5.php';
 
 // check for kmyacc.exe binary in this directory, otherwise fall back to global name
 $kmyacc = __DIR__ . '/kmyacc.exe';
@@ -35,6 +38,7 @@ const ARGS   = '\((?<args>[^()]*+(?:\((?&args)\)[^()]*+)*+)\)';
 /// Main script ///
 ///////////////////
 
+foreach ($grammarToResultFile as $grammarFile => $resultFile) {
     echo 'Building temporary preproprocessed grammar file.', "\n";
 
     $grammarCode = file_get_contents($grammarFile);
@@ -54,13 +58,14 @@ echo "Output: \"$output\"\n";
     $resultCode = file_get_contents($tmpResultFile);
     $resultCode = removeTrailingWhitespace($resultCode);
 
-ensureDirExists(dirname($parserResultFile));
+    ensureDirExists(dirname($resultFile));
-file_put_contents($parserResultFile, $resultCode);
+    file_put_contents($resultFile, $resultCode);
     unlink($tmpResultFile);
 
     if (!$optionKeepTmpGrammar) {
         unlink($tmpGrammarFile);
     }
+}
 
 ///////////////////////////////
 /// Preprocessing functions ///

lib/PhpParser/ParserAbstract.php

@@ -6,7 +6,7 @@ namespace PhpParser;
  * This parser is based on a skeleton written by Moriyoshi Koizumi, which in
  * turn is based on work by Masato Bito.
  */
-abstract class ParserAbstract
+abstract class ParserAbstract implements ParserInterface
 {
     const SYMBOL_NONE = -1;
 

lib/PhpParser/ParserInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace PhpParser;
+
+interface ParserInterface {
+    /**
+     * Parses PHP code into a node tree.
+     *
+     * @param string $code The source code to parse
+     *
+     * @return Node[]|null Array of statements (or null if the 'throwOnError' option is disabled and the parser was
+     *                     unable to recover from an error).
+     */
+    public function parse($code);
+
+    /**
+     * Get array of errors that occurred during the last parse.
+     *
+     * This method may only return multiple errors if the 'throwOnError' option is disabled.
+     *
+     * @return Error[]
+     */
+    public function getErrors();
+}