// In header: <boost/log/attributes/named_scope.hpp>

class named_scope : public attribute {
public:
  // types
  typedef named_scope_list       value_type;   // Scope names stack (the attribute value type) 
  typedef value_type::value_type scope_entry;  // Scope entry. 
  // member classes/structs/unions
  // Sentry object class to automatically push and pop scopes.
  struct sentry {
    // construct/copy/destruct
    sentry(string_literal const &, string_literal const &, unsigned int, 
           scope_entry::scope_name_type = scope_entry::general) noexcept;
    sentry(sentry const &) = delete;
    sentry & operator=(sentry const &) = delete;
    ~sentry();
  };
  // construct/copy/destruct
  named_scope();
  explicit named_scope(cast_source const &);
  // public static functions
  static void push_scope(scope_entry const &) noexcept;
  static void pop_scope() noexcept;
  static value_type const & get_scopes();
};