From 1ae511542c0b95314585fc98c08010318d50eadb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kjist=C3=B3f?= <mrtoth@strongds.hu>
Date: Sun, 27 Nov 2016 14:12:06 +0100
Subject: [PATCH] added missing virtual dtor for callable_base. first working
 version

---
 Function.hpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Function.hpp b/Function.hpp
index f062472..4327e44 100644
--- a/Function.hpp
+++ b/Function.hpp
@@ -10,6 +10,8 @@ private:
     {
     public:
         virtual Ret call(Args...) = 0;
+        virtual ~callable_base() {}
+        //virtual ~callable_base() = default;    // melyik számít szebbnek? van bármi különbség?
     };
 
     template <typename Fun>
@@ -19,8 +21,11 @@ private:
         Fun _fun;
     public:
         callable(Fun fun):_fun(fun) {}
-        virtual Ret call(Args... args)
+
+        virtual Ret call(Args... args) override
         { return _fun(std::forward<Args>(args)...); }
+
+        virtual ~callable() override {}
     };
 
     callable_base* _fun;
@@ -37,5 +42,8 @@ public:
     Ret operator()(Args... args) const
     { return _fun->call(std::forward<Args>(args)...); }
 
+    operator bool() const
+    { return static_cast<bool>(_fun); }
+
     ~Function() { delete _fun; }
 };
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