From 6a0b5e6ecac6afe21670ef4460efe019b60aa2a8 Mon Sep 17 00:00:00 2001
From: Henrique Mageste <hmageste@users.noreply.github.com>
Date: Thu, 30 Mar 2023 23:17:31 +0200
Subject: [PATCH] Abstract class needs at least one abstract method to be
 considered abstract (#2053)

The introduction of the method is needed, for instance, for constructions like std::is_abstract<AbstractBase>::value to be evaluated to true
---
 CppCoreGuidelines.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index 46919a6..7332146 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -4938,6 +4938,7 @@ defined as defaulted.
 
     class AbstractBase {
     public:
+        virtual void foo() = 0;  // at least one abstract method to make the class abstract
         virtual ~AbstractBase() = default;
         // ...
     };