Why is it not possible to use private method in a lambda?

Question

Having a class like this:

class A {
public:
    bool hasGrandChild() const;

private:
    bool hasChild() const;
    vector children_;
};
         


        

Answer 1

Workaround:

typedef  bool (A::*MemFn)(void) const;

bool A::hasGrandChild() const {
    MemFn f = &A::hasChild;
    return any_of(childs_.begin(), childs_.end(), [=](A const &a) {
            return (a.*f)();
    });
}