auto it = vector.begin() resulting type is not convertible to const_iterator

Question

Containers are required to provide an iterator type which is implicitly convertible to a const_iterator. Given this, I am trying to use auto

Answer 1

Why does auto deduce a typ[e in this case that is not convertible to const_iterator?

• You have two available overloads for begin() :

Signatures:

iterator begin();

const_iterator begin() const;

You declared your vector as Packets test (100);, which is non const.

If you declare it const, auto type deduction will have the second begin() overload as a best (and unique) match.

It compiles and run with this simple fix.