From 9efc2a70dcdb92b232c4c9f8317373b4534aafae Mon Sep 17 00:00:00 2001
From: Arun Saha <arunksaha@gmail.com>
Date: Sat, 18 Feb 2017 10:11:46 -0800
Subject: [PATCH 1/2] const member variable

---
 03-Style.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/03-Style.md b/03-Style.md
index b2c508f..e236628 100644
--- a/03-Style.md
+++ b/03-Style.md
@@ -277,11 +277,25 @@ private:
 // ... //
 ```
 
-
 Prefer {} initialization over alternatives unless you have a strong reason not to.
 
 Forgetting to initialize a member is a source of undefined behavior bugs which are often extremely hard to find.
 
+If the member variable is not expected to change after the initialization, then mark it `const`.
+
+```cpp
+class MyClass
+{
+public:
+  MyClass(int t_value)
+    : m_value{t_value}
+  {
+  }
+
+private:
+  const int m_value{0};
+};
+```
 
 ## Always Use Namespaces
 

From 743c4ebbcb53d4a5c5aaa091fd185562b911c522 Mon Sep 17 00:00:00 2001
From: Arun Sah <arunksaha@gmail.com>
Date: Sat, 25 Feb 2017 07:35:23 -0800
Subject: [PATCH 2/2] Note on copy assignment

---
 03-Style.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/03-Style.md b/03-Style.md
index e236628..b8de498 100644
--- a/03-Style.md
+++ b/03-Style.md
@@ -297,6 +297,8 @@ private:
 };
 ```
 
+Since a const member variable cannot be assigned a new value, such a class may not have a meaningful copy assignment operator.
+
 ## Always Use Namespaces
 
 There is almost never a reason to declare an identifier in the global namespace. Instead, functions and classes should exist in an appropriately named namespace or in a class inside of a namespace. Identifiers which are placed in the global namespace risk conflicting with identifiers from other libraries (mostly C, which doesn't have namespaces).