ignore built-in functions & constants

Author: vossik

InfinityloopCodingStandard/Sniffs/Namespaces/ReferenceUsedNamesAfterUsageSniff.php

@@ -130,13 +130,15 @@ public function process(File $phpcsFile, $openTagPointer) : void
                 }
             }
 
-            //Skip functions and constants
-            if ($reference->isFunction || $reference->isConstant) {
+            if ($reference->isClass === true && !NamespaceHelper::hasNamespace($name) && $isFullyQualified) {
                 continue;
             }
 
-            //Ignore stdClass
-            if ($reference->isClass === true && $canonicalName === 'stdClass') {
+            if ($reference->isFunction === true && !NamespaceHelper::hasNamespace($name) && $isFullyQualified) {
+                continue;
+            }
+
+            if ($reference->isConstant === true && !NamespaceHelper::hasNamespace($name) && $isFullyQualified) {
                 continue;
             }