Call super operator== from a vector inherited class in C++ - c++

Question

I'm trying to implement the compare operator of a class that inherits from vector.
I want it to compare first its own new attributes and then use the inherited operator from vector. This is an example:
struct A : vector<int> {
int a;
bool operator==(const A& other) {
return a == other.a && vector::operator==(other);
}
}
But I'm getting this error:
no member named 'operator==' in 'std::__1::vector<int, std::__1::allocator<int> >'
Same result with other classes from the STL, but it works well if I inherit from another class of my own.
This is the implementation of vector that I'm using:
inline _LIBCPP_INLINE_VISIBILITY
bool
operator==(const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
{
const typename vector<_Tp, _Allocator>::size_type __sz = __x.size();
return __sz == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
}
What I'm doing wrong?

Answer 1

vector's equality operator is a non-member function, which means you can't call it like that. You would be better off doing something like:
struct A : std::vector<int> {
int a;
bool operator==(const A& other) {
vector const& self = *this;
return a == other.a && self == other;
}
};
However, I wouldn't recommend inheriting from a standard container. Instead, you should have a std::vector<int> data member (composition over inheritance).