forbidUnusedException: fix ::class access false positive (#299)

Author: janedbal

src/Visitor/UnusedExceptionVisitor.php

@@ -7,6 +7,7 @@
 use PhpParser\Node\ArrayItem;
 use PhpParser\Node\Expr\Assign;
 use PhpParser\Node\Expr\BinaryOp\Coalesce;
+use PhpParser\Node\Expr\ClassConstFetch;
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Expr\New_;
 use PhpParser\Node\Expr\NullsafeMethodCall;
@@ -94,6 +95,7 @@ private function isUsed(Node $parent): bool
             || $parent instanceof Ternary
             || $parent instanceof Yield_
             || $parent instanceof Throw_
+            || $parent instanceof ClassConstFetch
             || $parent instanceof MatchArm;
     }
 

tests/Rule/data/ForbidUnusedExceptionRule/code.php

@@ -59,6 +59,11 @@ public function okUsage7(string $decide): void
         };
     }
 
+    public function okUsage8(): void
+    {
+        echo $this->getException()::class;
+    }
+
     public function getExceptionAtRuntime(): RuntimeException
     {
         return new RuntimeException();