Error Reference To Non-static Member Function Must Be Called
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Reference To Non-static Member Function Must Be Called Thread
a function inside a class. I try to do following: void MyClass::buttonClickedEvent( int buttonId ) { // I need to have an access to all members of MyClass's class } void MyClass::setEvent() { void ( *func ) ( int ); func = buttonClickedEvent; // <-- Reference to non static member function must be called } setEvent(); But there's an error: "Reference to non static member function must be called". What should I do to make a pointer non static member function without an object argument to a member of MyClass? c++ pointers reference share|improve this question edited Oct 13 '14 at 1:35 imreal 7,54621736 asked Oct 13 '14 at 1:04 JavaRunner 58421226 1 You can't have a function pointer assigned to a member function. You either have to use a pointer to member, or a free function. –imreal Oct 13 '14 at 1:16 What do you mean by the "pointer to a member"? As for "free function" you meant a function outside a class? Yeah, I know that it will work if I'll remove "MyClass::" part from definition "void MyClass::buttonClickedEvent..." but I need to have an access to members of MyClass inside the function "buttonClickedEvent"... –JavaRunner Oct 13 '14 at 1:26 add a comment| 2 Answers 2 active oldest votes up vote 9 down vote accepted The problem is that buttonClickedEvent is a member function and you need a pointer to member in order to invoke it. Try this: void (MyClass::*func)(int); func = &MyClass::buttonClickedEvent; And then when you invoke it, you need an object of type MyClass to do so, for example this: (this->*func)(
sure is causing this error because once I
Reference To Non-static Member Function Must Be Called C++11
don't comment them out pretty much everywhere Flink or Rlink is used or defined I get http://stackoverflow.com/questions/26331628/reference-to-non-static-member-function-must-be-called this error. Any ideas as to why? 1 library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) http://en.cppreference.com/w/cpp/language/member_functions Thread support library (C++11) Filesystem library (C++17) Technical Specifications [edit] C++ language Classes General overview class/struct types union types Members data members static members the this pointer nested classes member templates bit fields using-declarations member functions member access specifiers constructors and member initializer lists default member initializer(C++11) friend specifier explicit specifier converting constructor Special member function member functions default constructor copy constructor move constructor(C++11) copy assignment operator move assignment operator(C++11) destructor Inheritance base and derived classes virtual member functions override(C++11) final(C++11) pure virtual functions and abstract classes [edit] A non-static member function is a function that is declared in a member specification of a class without a static or friend static member function specifier. class S { int mf1(); // non-static member function declaration void mf2() volatile, mf3() &&; // can be cv-qualified and reference-qualified int mf4() const { return data; } // can be defined inline virtual void mf5() final; // can be virtual, can use final/override S() : data(12) {} // constructors are member functions too int data; }; int S::mf1() { return 7; } // if not defined inline, has to be defined at namespace Any function declarations are allowed, with additional syntax elements that are only available for non-static member functions: final and override specifiers, pure-specifiers, cv-qualifiers, ref-qualifiers, and member initialization lists. A non-static member function of class X may be called 1) For an object of type X using the class member access operator 2) For an object of a class derived from X 3) Directly from within the body of a member function of X 4) Directly from within the body of a member function of a c
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#ifndef nodes_Nodes_h #define nodes_Nodes_h #include