Refactor to use getStartPosition

Author: TysonAndre

README.md

@@ -7,7 +7,7 @@ an experiment and the start of a conversation.
 
 ![image](https://cloud.githubusercontent.com/assets/762848/19023070/4ab01c92-889a-11e6-9bb5-ec1a6816aba2.png)
 
-This is the v1 branch, which changes data structures to support syntax added after the initial release for php 7.0.
+This is the v0.1 branch, which changes data structures to support syntax added after the initial 0.0.x release line.
 
 ## Get Started
 After you've [configured your machine](docs/GettingStarted.md), you can use the parser to generate and work

src/Node.php

@@ -32,13 +32,7 @@ public function getNodeKindName() : string {
      * @throws \Exception
      */
     public function getStartPosition() : int {
-        $child = $this->getChildNodesAndTokens()->current();
-        if ($child instanceof Node) {
-            return $child->getStartPosition();
-        } elseif ($child instanceof Token) {
-            return $child->start;
-        }
-        throw new \Exception("Unknown type in AST");
+        return $this->getChildNodesAndTokens()->current()->getStartPosition();
     }
 
     /**
@@ -58,15 +52,7 @@ public function getFullStartPosition() : int {
                     $child = $child[0];
                 }
 
-                if ($child instanceof Node) {
-                    return $child->getFullStartPosition();
-                }
-
-                if ($child instanceof Token) {
-                    return $child->fullStart;
-                }
-
-                throw new \Exception("Unknown type in AST: " . \gettype($child));
+                return $child->getFullStartPosition();
             }
         };