Can I avoid an ambiguity, when I declare a fixed length vector in class?

Question

I want to declare a vector of 2 elements as a class member. But next code generates an error:

class A {
private:
   std::vector v (2);
   ...
}
         


        

Answer 1

An in-class initialiser has to use braces or the equals sign; so this could be

std::vector v = std::vector(2);

or

std::vector v {0,0};  // Careful! not {2}

Alternatively, you could use old-school initialisation in the constructor(s):

A() : v(2) {}