#ifndef ORIGIN_VECTOR_VISITOR_HPP
#define ORIGIN_VECTOR_VISITOR_HPP

namespace origin {

/**
 * The default vector visitor provides methods for receiving notification about
 * the automated expansion and contraction of vector's underlying capacity.
 * The preferred method of defining visitors is to inherit from this class
 * to provide the default implementations of non-overriden methods.
 *
 * @note Visitor methods are not currently provided for explicit resize
 * operations since those are (generally) easily determined.
 */
struct vector_visitor {
    template <typename V> void before_grow(V const&) { }
    template <typename V> void after_grow(V const&) { }

    template <typename V> void before_shrink(V const&) { }
    template <typename V> void after_shrink(V const&) { }
};

} // namespace origin

#endif