Add types to constructors and private/final/internal methods (Batch I)

Author: derrabus

Resource/GlobResource.php

@@ -174,7 +174,7 @@ function (\SplFileInfo $file, $path) {
         }
     }
 
-    private function computeHash()
+    private function computeHash(): string
     {
         $hash = hash_init('md5');
 

Resource/ReflectionClassResource.php

@@ -98,7 +98,7 @@ private function loadFiles(\ReflectionClass $class)
         } while ($class = $class->getParentClass());
     }
 
-    private function computeHash()
+    private function computeHash(): string
     {
         if (null === $this->classReflector) {
             try {
@@ -117,7 +117,7 @@ private function computeHash()
         return hash_final($hash);
     }
 
-    private function generateSignature(\ReflectionClass $class)
+    private function generateSignature(\ReflectionClass $class): iterable
     {
         yield $class->getDocComment();
         yield (int) $class->isFinal();