From be0e84e3f69e41860b3791617310e5573eec7938 Mon Sep 17 00:00:00 2001
From: Mariusz Glebocki <mglebocki@antmicro.com>
Date: Fri, 5 Nov 2021 17:06:19 +0100
Subject: [PATCH] Fix LayoutFunctionIterator's increment and decrement
 operators

---
 common/formatting/layout_optimizer_internal.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/formatting/layout_optimizer_internal.h b/common/formatting/layout_optimizer_internal.h
index 08c93dd30..f7969dd84 100644
--- a/common/formatting/layout_optimizer_internal.h
+++ b/common/formatting/layout_optimizer_internal.h
@@ -369,9 +369,9 @@ class LayoutFunctionIterator {
     return *this;
   }
 
-  iterator operator++() { return *this += 1; }
+  iterator& operator++() { return *this += 1; }
 
-  iterator operator--() { return *this -= 1; }
+  iterator& operator--() { return *this -= 1; }
 
   iterator operator++(int) {
     auto tmp = *this;