From 0c7ff3575b1325c211c3d528ef2dc7a8266548a7 Mon Sep 17 00:00:00 2001
From: Mario Emmenlauer <memmenlauer@biodataanalysis.de>
Date: Fri, 27 Jan 2023 11:52:14 +0100
Subject: [PATCH] Made a number of destructors virtual where needed (fix
 compile error with clang 15.x)

---
 src/gtpo/graph.h      | 2 +-
 src/gtpo/observable.h | 6 +++---
 src/gtpo/observer.h   | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/gtpo/graph.h b/src/gtpo/graph.h
index cd2446ac..8ca940ba 100644
--- a/src/gtpo/graph.h
+++ b/src/gtpo/graph.h
@@ -93,7 +93,7 @@ class graph : public graph_base_t,
         graph_base_t{parent},
         observable_base_t{} { }
 
-    ~graph();
+    virtual ~graph();
 
     graph(const graph&) = delete;
     graph& operator=(const graph&) = delete;
diff --git a/src/gtpo/observable.h b/src/gtpo/observable.h
index 9cf11ee1..a5900477 100644
--- a/src/gtpo/observable.h
+++ b/src/gtpo/observable.h
@@ -49,7 +49,7 @@ namespace gtpo { // ::gtpo
 class abstract_observable {
 public:
     abstract_observable() {}
-    ~abstract_observable() = default;
+    virtual ~abstract_observable() = default;
 
     abstract_observable(const abstract_observable&) = default;
     abstract_observable& operator=( const abstract_observable&) = default;
@@ -68,7 +68,7 @@ class observable : public abstract_observable
     //@{
 public:
     observable() : abstract_observable() { }
-    ~observable() noexcept {
+    virtual ~observable() noexcept {
         _observers.clear();
     }
     observable(const observable<observer_t>&) = default;
@@ -199,7 +199,7 @@ class observable_graph : public observable<gtpo::graph_observer<graph_t, node_t,
     using graph_observer_t = gtpo::graph_observer<graph_t, node_t, edge_t, group_t>;
     using super_t = observable<gtpo::graph_observer<graph_t, node_t, edge_t, group_t> >;
     observable_graph() : super_t{} { }
-    ~observable_graph() noexcept = default;
+    virtual ~observable_graph() noexcept = default;
     observable_graph(const observable_graph<graph_t, node_t, edge_t, group_t>&) = delete;
     observable_graph& operator=(const observable_graph<graph_t, node_t, edge_t, group_t>&) = delete;
     //@}
diff --git a/src/gtpo/observer.h b/src/gtpo/observer.h
index 60737541..d00ea934 100644
--- a/src/gtpo/observer.h
+++ b/src/gtpo/observer.h
@@ -154,7 +154,7 @@ class graph_observer : public observer<graph_t>
 
     using this_t = gtpo::graph_observer<graph_t, node_t, edge_t, group_t>;
     graph_observer() noexcept : gtpo::observer<graph_t>{} {}
-    ~graph_observer() noexcept = default;
+    virtual ~graph_observer() noexcept = default;
     graph_observer(const this_t&) = delete;
     graph_observer& operator=(const this_t&) = delete;