A member function pointer must be invoked using the .* (or ->*) syntax, so it can't be passed to a higher-order function: #include <vector> void for_each(auto const& v, auto f) { for (...

I originally created a class like so: class A { public: void run(int x); private: void run_helper1(); void run_helper2(); void run_helper3(); int a_; double b_; bool c_; }; ...

(This question popped to my mind after reading this one and its accepted answer.) Assume a class Foo that you cannot modify, that has a public member bar, but no getter for it. You might want to write ...

I've got various classes: struct foo final { std::string toString() const { return "foo"; } }; struct bar final { }; std::string toString(const bar&) { return "<bar>"; } ...

As the title suggests, I am wondering if I can call a non-member function (which is contained in the class header file) from inside the class, with the caveat that the nonmember function is using the ...

According to cppreference, in Argument-dependent lookups function names are looked up in the namespaces of their arguments in addition to the scopes and namespaces considered by the usual unqualified ...

I have a variable class that I am using to make scripting more easier in my program. I am trying to figure out an easy way to do something like the following: myclass { protected: int _data; ... }...

Lets say I implement some functions for type Foo. If they are member functions VS will offer them for a foo object but if I implement them as free / non-member functions then I get no help. foo....

I know the general use cases for the friend keyword with regards to encapsulation but one a couple of occasions, I have needed the friend keyword just to "get the job done". These use cases ...

When having a look at the documentation of std::map, I noticed that the lexicographical comparison operators (between maps) were not counted as member functions. Checked a few other containers (vector,...

I have searched for a specific answer for my question and i couldn't find one , so here is my question: I know that if we have operator+ and operator+= += should be a method and + a non-member ...

I've tried couple of weeks and searched for days for an answer, but haven't found it. My code is rather large and intertwined, but my problem is with 3 functions/classes, therefore I will only show my ...

So, I basically learnt class and also Template functions in C++. Suppose I have a record of students in a class with their roll number, name and total marks. I am using index sorting to sort the ...

I want to add v2 to v1. My member function is working, but free function is not. How can I solve this problem, thanks. When I compile with: clang++ -std=c++2a hw1.cpp -o hw1 and run with: ./hw1 give 5 ...

So I understood how to print a single linked list in reverse order using recursion. I'm having trouble with doing it non member functions. For example in int print_reverse(IntSLList & list)) ...