160 struct close_impl  struct
169 struct close_impl<any_tag> {  struct
171     static void close(T& t, BOOST_IOS::openmode which)  in close()
178     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)  in close()
188 struct close_impl<close_boost_stream> {  struct
190     static void close(T& t)  in close()
195     static void close(T& t, BOOST_IOS::openmode which)  in close()
203 struct close_impl<close_filtering_stream> {  struct
205     static void close(T& t, BOOST_IOS::openmode which)  in close()
216 struct close_impl<closable_tag> {  struct
218     static void close(T& t, BOOST_IOS::openmode which)  in close()
227     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)  in close()
240 struct close_impl<two_sequence> {  struct
242     static void close(T& t, BOOST_IOS::openmode which) { t.close(which); }  in close()
244     static void close(T& t, Sink& snk, BOOST_IOS::openmode which)  in close()