Also parse <?hh as valid start tag

Author: thekid

ChangeLog.md

@@ -3,6 +3,12 @@ XP Compiler ChangeLog
 
 ## ?.?.? / ????-??-??
 
+## 1.3.0 / 2017-11-04
+
+* Made it possible to use `<?hh` as opening tag, too. This way, we are
+  able to parse Hack language files.
+  (@thekid)
+
 ## 1.2.1 / 2017-10-31
 
 * Changed ambiguity resolution between casts, braced expressions and

src/main/php/lang/ast/Parse.class.php

@@ -384,20 +384,22 @@ private function setup() {
       return $node;
     });
 
-    $this->stmt('<?php', function($node) {
+    $this->stmt('<?', function($node) {
       $node->arity= 'start';
+      $node->value= $this->token->value;
+
+      $this->token= $this->advance();
       return $node;
     });
 
     $this->stmt('namespace', function($node) {
-      $package= $this->token->value;
+      $node->arity= 'package';
+      $node->value= $this->token->value;
+
       $this->token= $this->advance();
       $this->token= $this->expect(';');
 
-      $this->scope->package($package);
-
-      $node->arity= 'package';
-      $node->value= $package;
+      $this->scope->package($node->value);
       return $node;
     });
 

src/main/php/lang/ast/Tokens.class.php

@@ -7,7 +7,7 @@ class Tokens implements \IteratorAggregate {
   const DELIMITERS = " |&^?!.:;,@%~=<>(){}[]#+-*/'\$\"\r\n\t";
 
   private $operators= [
-    '<' => ['<=', '<<', '<>', '<=>', '<<=', '<?php'],
+    '<' => ['<=', '<<', '<>', '<?', '<=>', '<<='],
     '>' => ['>=', '>>', '>>='],
     '=' => ['=>', '==', '==>', '==='],
     '!' => ['!=', '!=='],