From 247b93e8ec82eb8f5537513fee9d857728f4690f Mon Sep 17 00:00:00 2001
From: "Vladimir Golovnev (Glassez)" <glassez@yandex.ru>
Date: Sat, 20 Jan 2018 12:10:21 +0300
Subject: [PATCH] Require '#pragma once' in new code

---
 CODING_GUIDELINES.md | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/CODING_GUIDELINES.md b/CODING_GUIDELINES.md
index 5f5cc6572..503d3d46e 100644
--- a/CODING_GUIDELINES.md
+++ b/CODING_GUIDELINES.md
@@ -240,7 +240,23 @@ Example:
 
 ```
 
-### 9. Misc. ###
+### 9. Include guard. ###
+`#pragma once` should be used instead of "include guard" in new code:
+```c++
+// examplewidget.h
+
+#pragma once
+
+#include <QWidget>
+
+class ExampleWidget : public QWidget
+{
+    // (some code omitted)
+};
+
+```
+
+### 10. Misc. ###
 
 * Line breaks for long lines with operation: