Fix global variables inside ClassMethod, refs #298

src/Compiler/GlobalVariable.php

@@ -27,4 +27,12 @@ public function getSymbolType()
     {
         return 'global-variable';
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isGlobal()
+    {
+        return true;
+    }
 }

src/Context.php

@@ -152,6 +152,8 @@ public function clearSymbols()
     {
         unset($this->symbols);
         $this->symbols = [];
+
+        $this->initGlobals();
     }
 
     /**

src/Definition/ClassDefinition.php

@@ -216,7 +216,7 @@ public function compile(Context $context)
             $symbols = $context->getSymbols();
             if (count($symbols) > 0) {
                 foreach ($symbols as $name => $variable) {
-                    if ($variable->isUnused()) {
+                    if (!$variable->isGlobal() && $variable->isUnused()) {
                         $context->warning(
                             'unused-' . $variable->getSymbolType(),
                             sprintf(

src/Variable.php

@@ -294,4 +294,14 @@ public function __debugInfo()
         ];
     }
     //@codeCoverageIgnoreEnd
+
+    /**
+     * Is global variable?
+     *
+     * @return bool
+     */
+    public function isGlobal()
+    {
+        return false;
+    }
 }