update

Callback_04/Callback_04.vcxproj

@@ -29,26 +29,26 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

Callback_04/Debug/Callback_04.log

@@ -1,2 +1 @@
-  Callback_04.cpp
-  Callback_04.vcxproj -> C:\Users\wruser\source\repos\Callback_04\Debug\Callback_04.exe
+  Callback_04.vcxproj -> C:\Users\wruser\source\repos\Callback_04\Debug\Callback_04.exe

Callback_04/Debug/Callback_04.tlog/Callback_04.lastbuildstate

@@ -1,2 +1,2 @@
-PlatformToolSet=v142:VCToolArchitecture=Native32Bit:VCToolsVersion=14.29.30133:VCServicingVersionMFC=14.29.30136:VCServicingVersionCrtHeaders=14.29.30136:TargetPlatformVersion=10.0.17763.0:
+PlatformToolSet=v143:VCToolArchitecture=Native32Bit:VCToolsVersion=14.32.31326:TargetPlatformVersion=10.0.19041.0:
 Debug|Win32|C:\Users\wruser\source\repos\Callback_04\|

Callback_05/Callback_05.cpp

@@ -4,49 +4,20 @@
 using std::cout;
 using std::endl;
 
-class EventHandler
-{
-public:
-/*
-    template<typename T>
-    void addHandler(T* owner)
-    {
-        cout << "Handler added..." << endl;
-        //Let's pretend an event just occured
-        owner->Callback(owner, 1);
-    }
-*/
-    void addHandler(std::function<void(int)> callback)
-    {
-        cout << "Handler added..." << endl;
-        // Let's pretend an event just occured
-        callback(1);
-    }
-
-};
-
-EventHandler* handler;
 
 /**********************************************************************************************
  *
  */
-
 class MyClass
 {
 public:
     MyClass() {
-        using namespace std::placeholders;
 
         private_x = 5;
-        // handler->addHandler(this);
-        handler->addHandler(std::bind(&MyClass::Callback, this, _1));
-    }
-
-    void Callback(int x) {
-        cout << x + private_x << endl;
-    }
+    };
     
     int public_x = 12;
+
 private:
     int private_x;
 };
@@ -54,21 +25,12 @@ private:
 /**********************************************************************************************
  *
  */
-
 class YourClass
 {
 public:
     YourClass()
     {
-        using namespace std::placeholders;
-
         private_y = 8;
-        handler->addHandler(std::bind(&YourClass::Callback, this, _1));
-    }
-
-    void Callback(int x) 
-    {
-        cout << x + private_y << endl;
     }
 
 private:
@@ -78,57 +40,49 @@ private:
 /**********************************************************************************************
  * 
  */
+void g(MyClass * a1, YourClass* a2) {
 
-void freeStandingCallback(int x)
-{
-    cout << x << endl;
+    printf("access both classes\n"); 
+    printf("MyClass: %d\n", a1->public_x);
+    printf("YourClass: private\n");
 }
 
 /**********************************************************************************************
  *
  */
+class EventHandler
+{
+public:
 
-// https://en.cppreference.com/w/cpp/language/function_template
-
-template<class X>
-void f(X a) {
-    printf("Test");
-}
-
-template<class X>
-void f(X* a) {
-    printf("Test");
-}
-
-void (*p)(int*) = &f;
-
-// https://en.cppreference.com/w/cpp/language/function_template
-
-// template<class T1, class T2>
-void g(MyClass* a1, YourClass* a2) {
-
-    printf("access both classes\n"); 
-    printf("MyClass: %d\n", a1->public_x);
-    printf("YourClass: private\n");
-}
+    std::function<void(MyClass*, YourClass*)> cb = nullptr; 
 
+    template<class T1, class T2>
+    void addHandler(std::function<void(T1*, T2*)> callback)
+    {
+        cout << "Handler added..." << endl;
+        cb = callback; 
+    }
 
+    template<class T1, class T2>
+    void call_cb(T1* myCl, T2* yourCl) {
+        if(cb != nullptr)
+          (cb)(myCl, yourCl);
+    }
+};
 
+/**********************************************************************************************
+ *
+ */
 int main(int argc, char** argv)
 {
-    handler = new EventHandler();
     MyClass* myClass = new MyClass();
     YourClass* yourClass = new YourClass();
+    EventHandler* handler = new EventHandler();
 
-    handler->addHandler([](int x) { 
-        std::cout << "x is " << x << '\n'; 
-        });
-
-    handler->addHandler(freeStandingCallback);
-
-    f(myClass->public_x);
-
-    g(myClass, yourClass);
-
+    /*
+     *  Here is the compiler error
+     */
+    handler->addHandler(g);
+    handler->call_cb(myClass, yourClass); 
 }
 

Callback_05/Callback_05.vcxproj

@@ -29,26 +29,26 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

Callback_05/Debug/Callback_05.log

@@ -1,2 +1,4 @@
   Callback_05.cpp
-  Callback_05.vcxproj -> C:\Users\wruser\source\repos\Callback_05\Debug\Callback_05.exe
+C:\Users\wruser\source\repos\Callback_05\Callback_05.cpp(85,12): error C2672: "EventHandler::addHandler": keine übereinstimmende überladene Funktion gefunden
+C:\Users\wruser\source\repos\Callback_05\Callback_05.cpp(85,26): error C2784: „void EventHandler::addHandler(std::function<void(T1 *,T2 *)>)“: Das Vorlage-Argument für „std::function<void(T1 *,T2 *)>“ konnte nicht von „void (MyClass *,YourClass *)“ abgeleitet werden.
+C:\Users\wruser\source\repos\Callback_05\Callback_05.cpp(60): message : Siehe Deklaration von "EventHandler::addHandler"

Callback_05/Debug/Callback_05.tlog/Callback_05.lastbuildstate

@@ -1,2 +1,2 @@
-PlatformToolSet=v142:VCToolArchitecture=Native32Bit:VCToolsVersion=14.29.30133:VCServicingVersionMFC=14.29.30136:VCServicingVersionCrtHeaders=14.29.30136:TargetPlatformVersion=10.0.17763.0:
+PlatformToolSet=v143:VCToolArchitecture=Native32Bit:VCToolsVersion=14.32.31326:TargetPlatformVersion=10.0.19041.0:
 Debug|Win32|C:\Users\wruser\source\repos\Callback_05\|

Callback_27/Callback_27/Callback_27.cpp

@@ -84,8 +84,15 @@ struct Client1
 };
 
 
-auto lambda = [](myData v) { std::cout << "Lambda: " << v.myAge * 2 << std::endl; return 0; };
-auto lambda2 = [](void* v, void* w) { std::cout << "Lambda: " << std::endl; return 0; };
+auto lambda = [&](myData v) { 
+	std::cout << "Lambda: " << v.myAge * 2 << std::endl; 
+	return 0; 
+};
+
+auto lambda2 = [&](void* v, void* w) { 
+	std::cout << "Lambda: " << std::endl; 
+	return 0; 
+};
 
 class Button {
 

Callback_27/Callback_27/cCallbackHdl.h

@@ -52,7 +52,6 @@ public:
 	}
 
 	/// Call all the registered callbacks.
-	// template <class T>
 	uint8_t CallBack_V_call(const CALLBACK_TYPE type, void* val, void* xal) const
 	{
 		if (m_call_map.find(type) == m_call_map.end()) {
@@ -61,36 +60,12 @@ public:
 		}
 
 		const auto& cb = m_call_map.find(type)->second;
-		return (cb)(val,xal);
-		// return 0; 
-	}
-
-
-#if 0
-	template <class T>
-	uint8_t register_call_2map(const CALLBACK_TYPE type, const T& cb)
-	{
-		// add callback to end of callback list
-		call_map.insert(std::make_pair(type, std::move(cb)));
-		return 0;
+		return (cb)(val, xal);
 	}
 
-	/// Call all the registered callbacks.
-	template <class T> // , class... Args>
-	uint8_t call_call_2map(const CALLBACK_TYPE type, T& val, T& xal) const // Args&&... args
-	{
-		if (call_map.find(type) == call_map.end()) {
-			// std::cout << "Index not found: " << index << std::endl;
-			return 1;
-		}
 
-		const auto& cb = call_map.find(type)->second;
-		return (cb)(val,xal);
-		// return 0;
-	}
-#endif
 
-// private:
+private:
 
 	// The map that stores the callbacks.
 	std::map<CALLBACK_TYPE, std::function<uint8_t(myData&)>> callmap;

Callback_27/Callback_27/cClassA.cpp

@@ -1,6 +1,6 @@
 #include "cClassA.h"
 #include "cCallbackHdl.h"
-#include "cDataStruct.h"
+#include "cDataStruct.h" 
 
 /***********************************************************************************************************************
  *    Callback on a c function

Callback_27/Callback_27/x64/Debug/Callback_27.Build.CppClean.log

@@ -0,0 +1,12 @@
+c:\users\wruser\source\repos\callback_27\x64\debug\callback_27.exe
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.ilk
+c:\users\wruser\source\repos\callback_27\x64\debug\callback_27.pdb
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.obj
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.obj.enc
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\cclassa.obj.enc
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\vc143.idb
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\vc143.pdb
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.tlog\cl.command.1.tlog
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.tlog\link.command.1.tlog
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.tlog\link.read.1.tlog
+c:\users\wruser\source\repos\callback_27\callback_27\x64\debug\callback_27.tlog\link.write.1.tlog

Callback_27/Callback_27/x64/Debug/Callback_27.log

@@ -1,3 +1,36 @@
   Callback_27.cpp
-C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(158,9): warning C4101: "mostData": Unreferenzierte lokale Variable
-  Callback_27.vcxproj -> C:\Users\wruser\source\repos\Callback_27\x64\Debug\Callback_27.exe
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cCallbackHdl.h(63,17): error C2061: Syntaxfehler: Bezeichner "cb"
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cCallbackHdl.h(63,1): error C3260: "(": Unerwartete Token vor Text der Lambdafunktion werden übersprungen.
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(10,1): error C2059: Syntaxfehler: "public"
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(19,2): error C2440: "return": "cCallbackHdl::CallBack_V_call::<lambda_114899ed3376bbdf9097759ff5da0dbf>" kann nicht in "uint8_t" konvertiert werden
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(19,1): message : Kein benutzerdefinierter Konvertierungsoperator verfügbar, der diese Konvertierung durchführen kann, oder der Operator kann nicht aufgerufen werden
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(24,1): error C2598: Bindungsinformationen müssen einen globalen Gültigkeitsbereich haben
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(25,17): error C2267: "c_client_callback": Statische Funktionen mit Blockgültigkeit sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(25,17): error C2601: "c_client_callback": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(24): message : Diese Zeile enthält eine "{", die keine Entsprechung hat.
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(38,1): error C2598: Bindungsinformationen müssen einen globalen Gültigkeitsbereich haben
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(39,17): error C2267: "c_client2_callback": Statische Funktionen mit Blockgültigkeit sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(39,17): error C2601: "c_client2_callback": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(38): message : Diese Zeile enthält eine "{", die keine Entsprechung hat.
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(48,1): error C2598: Bindungsinformationen müssen einen globalen Gültigkeitsbereich haben
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(49,17): error C2267: "c_client3_callback": Statische Funktionen mit Blockgültigkeit sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(49,17): error C2601: "c_client3_callback": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(48): message : Diese Zeile enthält eine "{", die keine Entsprechung hat.
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(129,54): error C2326: "void cCallbackHdl::CallBack_V_call::Button::init(void)": Funktion kann nicht auf "lambda" zugreifen
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(131,56): error C2326: "void cCallbackHdl::CallBack_V_call::Button::init(void)": Funktion kann nicht auf "lambda2" zugreifen
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(154,5): error C2601: "main": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\Callback_27.cpp(180,1): fatal error C1004: Unerwartetes Dateiende gefunden.
+  cClassA.cpp
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cCallbackHdl.h(63,17): error C2061: Syntaxfehler: Bezeichner "cb"
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cCallbackHdl.h(63,1): error C3260: "(": Unerwartete Token vor Text der Lambdafunktion werden übersprungen.
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(10,1): error C2059: Syntaxfehler: "public"
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(19,2): error C2440: "return": "cCallbackHdl::CallBack_V_call::<lambda_114899ed3376bbdf9097759ff5da0dbf>" kann nicht in "uint8_t" konvertiert werden
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.h(19,1): message : Kein benutzerdefinierter Konvertierungsoperator verfügbar, der diese Konvertierung durchführen kann, oder der Operator kann nicht aufgerufen werden
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(9,17): error C2267: "c_client4_callback": Statische Funktionen mit Blockgültigkeit sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(9,17): error C2601: "c_client4_callback": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(32,6): error C2653: "A": Keine Klasse oder Namespace
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(32,16): error C2601: "init": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(38,6): error C2653: "A": Keine Klasse oder Namespace
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(38,15): error C2601: "run": Lokale Funktionsdefinitionen sind unzulässig
+C:\Users\wruser\source\repos\Callback_27\Callback_27\cClassA.cpp(48,1): fatal error C1004: Unerwartetes Dateiende gefunden.
+  Code wird generiert...

Callback_29/Callback_29.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.1.32328.378
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Callback_29", "Callback_29\Callback_29.vcxproj", "{6C01E599-E51A-428D-A9A1-3229ADD44B8C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Debug|x64.ActiveCfg = Debug|x64
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Debug|x64.Build.0 = Debug|x64
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Debug|x86.ActiveCfg = Debug|Win32
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Debug|x86.Build.0 = Debug|Win32
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Release|x64.ActiveCfg = Release|x64
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Release|x64.Build.0 = Release|x64
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Release|x86.ActiveCfg = Release|Win32
+		{6C01E599-E51A-428D-A9A1-3229ADD44B8C}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {8DE365A5-FA09-43CD-9DE2-806019950BD6}
+	EndGlobalSection
+EndGlobal

Callback_29/Callback_29/Callback_29.cpp

@@ -0,0 +1,120 @@
+// Callback_24.cpp : Diese Datei enthält die Funktion "main". Hier beginnt und endet die Ausführung des Programms.
+//
+//  https://github.com/wisoltech/cpp11-callbacks/blob/master/callback4.cc
+//  https://www.wisol.ch/w/articles/2015-03-08-callbacks-in-cpp11/
+// 
+//
+
+#include <iostream>
+#include <vector>
+#include <functional>
+#include <map>
+
+#include "cCallbackHdl.h"
+#include "cDataStruct.h"
+#include "cClassA.h"
+
+
+class Button;
+
+/***********************************************************************************************************************
+ * Dummy Client #1
+ * Uses a static method for a callback.
+ */
+struct Client1
+{
+	static uint8_t func(void* v, void* w) {
+		myData* x = (myData*)v;
+		Button* y = (Button*)w;
+
+		printf("static Client1::func2 %d\n", x->myAge);
+		printf("static Client1::func2 %d\n", x->myAge);
+		return 4;
+	};
+
+	static uint8_t func2() {
+
+		printf("static Client1::func2 %d\n");
+		printf("static Client1::func2 %d\n");
+		return 4;
+	};
+
+};
+
+
+class Button {
+
+public:
+
+	cCallbackHdl cbHdl;
+
+	myData mydata{ 24, "myData struct", myData::FEMALE };
+
+	myOtherData myOtherdata{ 34, "myOtherdata struct", myOtherData::FEMALE };
+
+	/*************************************************************************************
+	 *
+	 */
+	void init() {
+		/**************************************************************************************
+		 *  https://en.cppreference.com/w/cpp/language/lambda
+		 *  https://stackoverflow.com/questions/6458612/c0x-proper-way-to-receive-a-lambda-as-parameter-by-reference
+		 */
+
+		auto lambda2 = [this](void* v, void* w) { std::cout << "Lambda: " << std::endl; return 0; };
+
+		auto res = cbHdl.cb_register(CALLBACK_TYPE::A, [this](void* v, void* w) {
+			myData* x = (myData*)v;
+			Button* y = (Button*)w;
+
+			printf("lambda callback: %d\n", x->myAge);
+			return 2;
+			});
+
+		uint8_t resmap = cbHdl.cb_register(CALLBACK_TYPE::D, lambda2);
+		resmap = cbHdl.cb_register(CALLBACK_TYPE::D, &Client1::func);
+
+		auto desres = cbHdl.cb_2register(CALLBACK_TYPE::A, [this]() {
+
+			printf("lambda callback: %d\n", 12);
+			return 2;
+			});
+
+	}
+
+	/**********************************************************************************************/
+
+	void run() {
+		std::cout << " run ..." << std::endl;
+
+		uint8_t x = cbHdl.cb_call(CALLBACK_TYPE::A, (void*)&myOtherdata, (void*)this);
+		uint8_t y = cbHdl.cb_call(CALLBACK_TYPE::D, (void*)&myOtherdata, (void*) nullptr);
+		auto cb2 = cbHdl.cb_2call(CALLBACK_TYPE::A);
+		(cb2) ();
+
+
+	}
+};
+
+
+/***********************************************************************************************************************
+ *    Callback on a c function
+ */
+int main()
+{
+	std::cout << "Hello World!\n";
+
+	Button button;
+
+	/*
+	 *  https://www.wisol.ch/w/articles/2015-03-08-callbacks-in-cpp11/
+	 */
+
+	button.init();
+	button.run();
+
+	return 1;
+}
+
+
+

Callback_29/Callback_29/Callback_29.vcxproj

@@ -0,0 +1,153 @@
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+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
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+    <ClInclude Include="cCallbackHdl.h" />
+    <ClInclude Include="cClassA.h" />
+    <ClInclude Include="cDataStruct.h" />
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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+  </ImportGroup>
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Callback_29/Callback_29/Callback_29.vcxproj.filters

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+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+    <Filter Include="Quelldateien">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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+    <Filter Include="Headerdateien">
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+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
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+    <ClCompile Include="Callback_29.cpp">
+      <Filter>Quelldateien</Filter>
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+      <Filter>Quelldateien</Filter>
+    </ClCompile>
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+    <ClInclude Include="cClassA.h">
+      <Filter>Headerdateien</Filter>
+    </ClInclude>
+    <ClInclude Include="cDataStruct.h">
+      <Filter>Headerdateien</Filter>
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+    <ClInclude Include="cCallbackHdl.h">
+      <Filter>Headerdateien</Filter>
+    </ClInclude>
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Callback_29/Callback_29/Callback_29.vcxproj.user

@@ -0,0 +1,4 @@
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+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup />
+</Project>

Callback_29/Callback_29/cCallbackHdl.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <iostream>
+#include <vector>
+#include <functional>
+#include <map>
+#include <unordered_map>
+
+#include "cDataStruct.h"
+
+/***********************************************************************************************************************
+ ***********************************************************************************************************************/
+
+
+enum class CALLBACK_TYPE { A, B, C, D };
+
+using map_t = std::map < CALLBACK_TYPE, std::function<uint8_t(void*, void*)>>;
+
+
+class cCallbackHdl {
+
+public:
+
+	cCallbackHdl() {};
+
+
+
+	template <class T>
+	uint8_t cb_register(const CALLBACK_TYPE type, const T& cb)
+	{
+		// add callback to end of callback list
+		m_call_map.insert(std::make_pair(type, std::move(cb)));
+		return 0;
+	}
+
+	template <class T>
+	uint8_t cb_2register(const CALLBACK_TYPE type, const T& cb)
+	{
+		// add callback to end of callback list
+		m_call_2_map.insert(std::make_pair(type, std::move(cb)));
+		return 0;
+	}
+
+	/// Call all the registered callbacks.
+	uint8_t cb_call(const CALLBACK_TYPE type, void* val, void* xal) const
+	{
+		if (m_call_map.find(type) == m_call_map.end()) {
+			// std::cout << "Index not found: " << index << std::endl;
+			return 1;
+		}
+
+		const auto& cb = m_call_map.find(type)->second;
+		return (cb)(val, xal);
+	}
+
+
+	/// Call all the registered callbacks.
+	auto cb_2call(const CALLBACK_TYPE type) const
+	{
+		if (m_call_2_map.find(type) == m_call_2_map.end()) {
+			std::cout << "Index not found: " << std::endl;
+		}
+
+		const auto& cb = m_call_2_map.find(type)->second;
+		return cb;
+	}
+
+private:
+
+	// The map that stores the callbacks.
+
+	std::map<CALLBACK_TYPE, std::function<uint8_t(void*, void*)>> m_call_map;
+	std::map<CALLBACK_TYPE, std::function<uint8_t()>> m_call_2_map;
+};

Callback_29/Callback_29/cClassA.cpp

@@ -0,0 +1,4 @@
+#include "cClassA.h"
+#include "cCallbackHdl.h"
+#include "cDataStruct.h" 
+

Callback_29/Callback_29/cClassA.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "cCallbackHdl.h"
+#include "cDataStruct.h"
+
+
+

Callback_29/Callback_29/cDataStruct.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <iostream>
+#include <vector>
+#include <functional>
+#include <map>
+
+struct MyFieldInterface
+{
+	virtual void fieldInter() = 0;
+	virtual ~MyFieldInterface() {};
+};
+
+struct myfriendClass {
+
+	void fieldInter() {};
+	uint8_t myVal;
+	const char* pchar = "myfriendClass";
+};
+
+
+struct myData {
+
+	uint8_t myAge;
+	const char* pchar;
+	enum en_sex { MALE, FEMALE, DIVERS } sex;
+};
+
+struct myOtherData {
+
+	uint8_t myAge;
+	const char* pchar;
+	enum en_sex { MALE, FEMALE, DIVERS } sex;
+};
+
+

Callback_29/Callback_29/x64/Debug/Callback_29.exe.recipe

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+<Project>
+  <ProjectOutputs>
+    <ProjectOutput>
+      <FullPath>C:\Users\wruser\source\repos\Callback_29\x64\Debug\Callback_29.exe</FullPath>
+    </ProjectOutput>
+  </ProjectOutputs>
+  <ContentFiles />
+  <SatelliteDlls />
+  <NonRecipeFileRefs />
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Callback_29/Callback_29/x64/Debug/Callback_29.log

@@ -0,0 +1,8 @@
+  Callback_29.cpp
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(37,10): warning C4473: "printf": nicht genügend Argumente für Formatzeichenfolge übergeben
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(37,10): message : Platzhalter und deren Parameter erwarten 1 variadic-Argumente, es wurden aber 0 variadic-Argumente bereitgestellt.
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(37,10): message : Das fehlende variadic-Argument "1" ist für die Zeichenfolge "%d" erforderlich.
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(38,10): warning C4473: "printf": nicht genügend Argumente für Formatzeichenfolge übergeben
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(38,10): message : Platzhalter und deren Parameter erwarten 1 variadic-Argumente, es wurden aber 0 variadic-Argumente bereitgestellt.
+C:\Users\wruser\source\repos\Callback_29\Callback_29\Callback_29.cpp(38,10): message : Das fehlende variadic-Argument "1" ist für die Zeichenfolge "%d" erforderlich.
+  Callback_29.vcxproj -> C:\Users\wruser\source\repos\Callback_29\x64\Debug\Callback_29.exe

Callback_29/Callback_29/x64/Debug/Callback_29.tlog/Callback_29.lastbuildstate

@@ -0,0 +1,2 @@
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Callback_30/Callback_30.sln

@@ -0,0 +1,31 @@
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+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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+		{922E6443-3E14-419B-A8B5-30F3DF22C284}.Debug|x64.Build.0 = Debug|x64
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+		HideSolutionNode = FALSE
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+	GlobalSection(ExtensibilityGlobals) = postSolution
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