Stack (C++)

A stack is a standard C++ container, designed to be used in a LIFO (computing) context, and is implemented as an interface/wrapper to the type passed to it as a template argument, which defaults to a deque. It is so simple, that it can be described just by an sample interface:

template<class T, Class C = deque<T> >
class std::stack {
protected:
C c;
public:
typedef typename C::value_type value_type;
typedef typename C::size_type size_type;
typedef C container_type;
explicit stack(const C& a = C()) : c(a){} // Inherit the constructor
bool empty() const { return c.empty(); }
size_type size() const { return c.size(); }
value_type& top() const { return c.back(); }
const value_type& top() const { return c.back(); }
void push(const value_type& n) { c.push_back(n); }
void pop() { c.pop_back(); }
};