.

Author: hoklavat

58-PointerToMember.cpp

@@ -0,0 +1,27 @@
+//58-PointerToMember
+
+#include <iostream>
+
+class A{
+public:
+	void f(int x){
+		std::cout << "A::f is called. " << x << std::endl;
+	}
+	
+	char x;
+};
+
+int main(){
+	using pf = void (A::*)(int);
+	pf sf = &A::f; //pointer to member function.
+	
+	using pd = char (A::*);
+	pd sd = &A::x; //pointer to member data.
+	
+	A *a = new A();
+	a->f(1);
+	(a->*sf)(2);
+	
+	a->*sd = 'a';
+	std::cout << a->*sd << std::endl;
+}

MODERNCPP_REMINDER.txt

@@ -18,6 +18,7 @@
 * Constructor: builds objects from predefined types. explicit purpose is initializing objects. 
 * Container: generic collection of class templates and algorithms that allow programmers to easily implement common data structures.
 * Contextual Keyword: has special meaning in few contexts but can be used as ordinary identifier elsewhere. example: final, override.
+* Contravariance: assigning pointer to member of base class to pointer to member of derived class.
 * Copy Constructor: makes copy of object without modifying it. 
 * Declaration: introduce names into program. 
 * Default Constructor: constructor that can be called with no arguments, or that can take arguments, provided they are given default values.