From 984534e89cad59675d1752768dada90a56b624f6 Mon Sep 17 00:00:00 2001
From: John Wellbelove <github@wellbelove.co.uk>
Date: Fri, 6 Dec 2019 18:39:10 +0000
Subject: [PATCH] Added virtual destructors

---
 include/etl/visitor.h | 100 ++++++++++++++++++++++++++++++------------
 1 file changed, 72 insertions(+), 28 deletions(-)

diff --git a/include/etl/visitor.h b/include/etl/visitor.h
index 08212225..e36aa31b 100644
--- a/include/etl/visitor.h
+++ b/include/etl/visitor.h
@@ -74,6 +74,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitable() {}
+
     virtual void accept(T1&) = 0;
   };
 
@@ -89,6 +91,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitable() {}
+
     virtual void accept(T1&) = 0;
     virtual void accept(T2&) = 0;
     virtual void accept(T3&) = 0;
@@ -105,6 +109,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitable() {}
+
     virtual void accept(T1&) = 0;
     virtual void accept(T2&) = 0;
     virtual void accept(T3&) = 0;
@@ -120,6 +126,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitable() {}
+
     virtual void accept(T1&) = 0;
     virtual void accept(T2&) = 0;
   };
@@ -134,6 +142,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitable() {}
+
     virtual void accept(T1&) = 0;
   };
 
@@ -163,6 +173,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
   };
 
@@ -181,6 +193,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -212,6 +226,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -242,6 +258,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -271,6 +289,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -298,6 +318,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -324,6 +346,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -349,6 +373,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -373,6 +399,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -395,6 +423,8 @@ namespace etl
   {
   public:
 
+    virtual ~visitor() {}
+
     virtual void visit(T1&) = 0;
     virtual void visit(T2&) = 0;
     virtual void visit(T3&) = 0;
@@ -416,13 +446,15 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
-      virtual void visit(T3&) = 0;
-      virtual void visit(T4&) = 0;
-      virtual void visit(T5&) = 0;
-      virtual void visit(T6&) = 0;
-      virtual void visit(T7&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
+    virtual void visit(T3&) = 0;
+    virtual void visit(T4&) = 0;
+    virtual void visit(T5&) = 0;
+    virtual void visit(T6&) = 0;
+    virtual void visit(T7&) = 0;
   };
 
   //*****************************************************************
@@ -436,12 +468,14 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
-      virtual void visit(T3&) = 0;
-      virtual void visit(T4&) = 0;
-      virtual void visit(T5&) = 0;
-      virtual void visit(T6&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
+    virtual void visit(T3&) = 0;
+    virtual void visit(T4&) = 0;
+    virtual void visit(T5&) = 0;
+    virtual void visit(T6&) = 0;
   };
 
   //*****************************************************************
@@ -455,11 +489,13 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
-      virtual void visit(T3&) = 0;
-      virtual void visit(T4&) = 0;
-      virtual void visit(T5&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
+    virtual void visit(T3&) = 0;
+    virtual void visit(T4&) = 0;
+    virtual void visit(T5&) = 0;
   };
 
   //*****************************************************************
@@ -472,10 +508,12 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
-      virtual void visit(T3&) = 0;
-      virtual void visit(T4&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
+    virtual void visit(T3&) = 0;
+    virtual void visit(T4&) = 0;
   };
 
   //*****************************************************************
@@ -488,9 +526,11 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
-      virtual void visit(T3&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
+    virtual void visit(T3&) = 0;
   };
 
   //*****************************************************************
@@ -503,8 +543,10 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
-      virtual void visit(T2&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
+    virtual void visit(T2&) = 0;
   };
 
   //*****************************************************************
@@ -517,7 +559,9 @@ namespace etl
   {
   public:
 
-      virtual void visit(T1&) = 0;
+    virtual ~visitor() {}
+
+    virtual void visit(T1&) = 0;
   };
 
 #endif