Function mapping

example/cacheHierarchy/fkYAML/node.hpp:12193–12197

    template <typename... Args>
    static void mapping(BasicNodeType& n, Args&&... args) {
        destroy(n);
        n.m_attrs |= node_attr_bits::map_bit;
        n.m_value.p_map = create_object<typename BasicNodeType::mapping_type>(std::forward<Args>(args)...);
    }

    static void null_scalar(BasicNodeType& n, std::nullptr_t) {
        destroy(n);