Class-ify ui_out

This patch finalizes the C++ conversion of the ui-out subsystem, by
turning the ui_out and ui_out_impl structures into a single class
hierarchy.  ui_out functions are turned into virtual methods of that new
class, so as a result there are a lot of call sites to update.

In the previous version of the patchset, there were separate ui_out and
ui_out_impl classes, but it wasn't really useful and added boilerplate.
In this version there is simply an ui_out base class that is
extended for CLI, TUI and MI.

It's a bit hard to maintain a ChangeLog for such a big patch, I did my
best but I'm sure there are some missing or outdated info in there...

gdb/ChangeLog:

    * ui-out.h (ui_out_begin, ui_out_end, ui_out_table_header,
    ui_out_table_body,  ui_out_field_int, ui_out_field_fmt_int,
    ui_out_field_core_addr, ui_out_field_string, ui_out_field_stream,
    ui_out_field_fmt, ui_out_field_skip, ui_out_spaces, ui_out_text,
    ui_out_message, ui_out_wrap_hint, ui_out_flush, ui_out_test_flags,
    ui_out_query_field, ui_out_is_mi_like_p, ui_out_redirect):
    Remove, replace with a method in class ui_out.
    (table_begin_ftype): Remove, replace with pure virtual method in
    class ui_out.
    (table_body_ftype): Likewise.
    (table_end_ftype): Likewise.
    (table_header_ftype): Likewise.
    (ui_out_begin_ftype): Likewise.
    (ui_out_end_ftype): Likewise.
    (field_int_ftype): Likewise.
    (field_skip_ftype): Likewise.
    (field_string_ftype): Likewise.
    (field_fmt_ftype): Likewise.
    (spaces_ftype): Likewise.
    (text_ftype): Likewise.
    (message_ftype): Likewise.
    (wrap_hint_ftype): Likewise.
    (flush_ftype): Likewise.
    (redirect_ftype): Likewise.
    (data_destroy_ftype): Likewise.
    (struct ui_out_impl): Remove, replace with class ui_out.
    (ui_out_new): Remove.
    (class ui_out): New class.
    * ui-out.c (struct ui_out): Remove, replaced with class ui_out.
    (current_level): Remove, replace with ui_out method.
    (push_level): Likewise.
    (pop_level): Likewise.
    (uo_table_begin, uo_table_body, uo_table_end, uo_table_header,
    uo_begin, uo_end, uo_field_int, uo_field_skip, uo_field_fmt,
    uo_spaces, uo_text, uo_message, uo_wrap_hint, uo_flush,
    uo_redirect, uo_field_string): Remove.
    (ui_out_table_begin): Replace with ...
    (ui_out::table_begin): ... this.
    (ui_out_table_body): Replace with ...
    (ui_out::table_body): ... this.
    (ui_out_table_end): Replace with ...
    (ui_out::table_end): ... this.
    (ui_out_table_header): Replace with ...
    (ui_out::table_header): ... this.
    (ui_out_begin): Replace with ...
    (ui_out::begin): ... this.
    (ui_out_end): Replace with ...
    (ui_out::end): ... this.
    (ui_out_field_int): Replace with ...
    (ui_out::field_int): ... this.
    (ui_out_field_fmt_int): Replace with ...
    (ui_out::field_fmt_int): ... this.
    (ui_out_field_core_addr): Replace with ...
    (ui_out::field_core_addr): ... this.
    (ui_out_field_stream): Replace with ...
    (ui_out::field_stream): ... this.
    (ui_out_field_skip): Replace with ...
    (ui_out::field_skip): ... this.
    (ui_out_field_string): Replace with ...
    (ui_out::field_string): ... this.
    (ui_out_field_fmt): Replace with ...
    (ui_out::field_fmt): ... this.
    (ui_out_spaces): Replace with ...
    (ui_out::spaces): ... this.
    (ui_out_text): Replace with ...
    (ui_out::text): ... this.
    (ui_out_message): Replace with ...
    (ui_out::message): ... this.
    (ui_out_wrap_hint): Replace with ...
    (ui_out::wrap_hint): ... this.
    (ui_out_flush): Replace with ...
    (ui_out::flush): ... this.
    (ui_out_redirect): Replace with ...
    (ui_out::redirect): ... this.
    (ui_out_test_flags): Replace with ...
    (ui_out::test_flags): ... this.
    (ui_out_is_mi_like_p): Replace with ...
    (ui_out::is_mi_like_p): ... this.
    (verify_field): Replace with ...
    (ui_out::verify_field): ... this.
    (ui_out_query_field): Replace with ...
    (ui_out::query_table_field): ... this.
    (ui_out_data): Remove.
    (ui_out_new): Remove, replace with ...
    (ui_out::ui_out): ... this constructor.
    (do_cleanup_table_end, make_cleanup_ui_out_tuple_begin_end,
    do_cleanup_end, make_cleanup_ui_out_tuple_begin_end,
    make_cleanup_ui_out_list_begin_end): Update fallouts of struct
    ui_out -> class ui_out change.
    * cli-out.c (cli_out_data): Remove.
    (cli_uiout_dtor): Remove.
    (cli_table_begin): Replace with ...
    (cli_ui_out::do_table_begin): ... this new method.
    (cli_table_body): Replace with ...
    (cli_ui_out::do_table_body): ... this new method.
    (cli_table_end): Replace with ...
    (cli_ui_out::do_table_end): ... this new method.
    (cli_table_header): Replace with ...
    (cli_ui_out::do_table_header): ... this new method.
    (cli_begin): Replace with ...
    (cli_ui_out::do_begin): ... this new method.
    (cli_end): Replace with ...
    (cli_ui_out::do_end): ... this new method.
    (cli_field_int): Replace with ...
    (cli_ui_out::do_field_int): ... this new method.
    (cli_field_skip): Replace with ...
    (cli_ui_out::do_field_skip): ... this new method.
    (cli_field_string): Replace with ...
    (cli_ui_out::do_field_string): ... this new method.
    (cli_field_fmt): Replace with ...
    (cli_ui_out::do_field_fmt): ... this new method.
    (cli_spaces): Replace with ...
    (cli_ui_out::do_spaces): ... this new method.
    (cli_text): Replace with ...
    (cli_ui_out::do_text): ... this new method.
    (cli_message): Replace with ...
    (cli_ui_out::do_message): ... this new method.
    (cli_wrap_hint): Replace with ...
    (cli_ui_out::do_wrap_hint): ... this new method.
    (cli_flush): Replace with ...
    (cli_ui_out::do_flush): ... this new method.
    (cli_redirect): Replace with ...
    (cli_ui_out::do_redirect): ... this new method.
    (out_field_fmt): Replace with ...
    (cli_ui_out::out_field_fmt): ... this new method.
    (field_separator): Replace with ...
    (cli_ui_out::field_separator): ... this new method.
    (cli_out_set_stream): Replace with ...
    (cli_ui_out::set_stream): ... this new method.
    (cli_ui_out_impl): Remove.
    (cli_out_data_ctor): Remove.
    (cli_ui_out_impl::cli_ui_out_impl): New constructor.
    (cli_ui_out_impl::~cli_ui_out_impl): New destructor.
    (cli_out_new): Change return type to cli_ui_out *, instantiate a
    cli_ui_out.
    * cli-out.h (cli_ui_out_data): Remove, replace with class
    cli_ui_out.
    (class cli_ui_out): New class.
    (cli_ui_out_impl): Remove.
    (cli_out_data_ctor): Remove.
    (cli_out_new): Change return type to cli_ui_out*.
    (cli_out_set_stream): Remove.
    * cli/cli-interp.c (struct cli_interp) <cli_uiout>: Change type
    to cli_ui_out*.
    (cli_interpreter_resume): Adapt.
    (cli_interpreter_exec): Adapt.
    * mi/mi-out.c (mi_ui_out_data, mi_out_data): Remove.
    (mi_ui_out_impl): Remove.
    (mi_table_begin): Replace with ...
    (mi_ui_out::do_table_begin): ... this.
    (mi_table_body): Replace with ...
    (mi_ui_out::do_table_body): ... this.
    (mi_table_end): Replace with ...
    (mi_ui_out::do_table_end): ... this.
    (mi_table_header): Replace with ...
    (mi_ui_out::do_table_header): ... this.
    (mi_begin): Replace with ...
    (mi_ui_out::do_begin): ... this.
    (mi_end): Replace with ...
    (mi_ui_out::do_end): ... this.
    (mi_field_int): Replace with ...
    (mi_ui_out::do_field_int): ... this.
    (mi_field_skip): Replace with ...
    (mi_ui_out::do_field_skip): ... this.
    (mi_field_string): Replace with ...
    (mi_ui_out::do_field_string): ... this.
    (mi_field_fmt): Replace with ...
    (mi_ui_out::do_field_fmt): ... this.
    (mi_spaces): Replace with ...
    (mi_ui_out::do_spaces): ... this.
    (mi_text): Replace with ...
    (mi_ui_out::do_text): ... this.
    (mi_message): Replace with ...
    (mi_ui_out::do_message): ... this.
    (mi_wrap_hint): Replace with ...
    (mi_ui_out::do_wrap_hint): ... this.
    (mi_flush): Replace with ...
    (mi_ui_out::do_flush): ... this.
    (mi_redirect): Replace with ...
    (mi_ui_out::do_redirect):
    (field_separator): Replace with ...
    (mi_ui_out::field_separator):
    (mi_open): Replace with ...
    (mi_ui_out::open): ... this.
    (mi_close): Replace with ...
    (mi_ui_out::close): ... this.
    (mi_out_rewind): Replace with ...
    (mi_ui_out::rewind): ... this.
    (mi_out_put): Replace with ...
    (mi_ui_out::put): ... this.
    (mi_version): Replace with ...
    (mi_ui_out::version): ... this.
    (mi_out_data_ctor): Replace with ...
    (mi_ui_out::mi_ui_out): ... this.
    (mi_out_data_dtor): Replace with ...
    (mi_ui_out::~mi_ui_out): ... this.
    (mi_out_new): Change return type to mi_ui_out*, instantiate
    an mi_ui_out object.
    (as_mi_ui_out): New function.
    (mi_version): Update fallouts of struct ui_out to class ui_out
    transition.
    (mi_out_put): Likewise.
    (mi_out_rewind): Likewise.
    * mi/mi-out.h (mi_out_new): Change return type to mi_ui_out*.
    * tui/tui-out.c (tui_ui_out_data, tui_out_data, tui_ui_out_impl):
    Remove.
    (tui_field_int): Replace with ...
    (tui_ui_out::do_field_int): ... this.
    (tui_field_string): Replace with ...
    (tui_ui_out::do_field_string): ... this.
    (tui_field_fmt): Replace with ...
    (tui_ui_out::do_field_fmt): ... this.
    (tui_text): Replace with ...
    (tui_ui_out::do_text): ... this.
    (tui_out_new): Change return type to tui_ui_out*, instantiate
    tui_ui_out object.
    (tui_ui_out::tui_ui_out): New.
    * tui/tui-out.h: New file.
    * tui/tui.h (tui_out_new): Move declaration to tui/tui-out.h.
    * tui/tui-io.c: Include tui/tui-out.h.
    (tui_old_uiout): Change type to cli_ui_out*.
    (tui_setup_io): Use dynamic_cast.
    * tui/tui-io.h (tui_old_uiout): Change type to cli_ui_out*.
    * tui/tui-interp.c (tui_resume): Adapt.
    * ada-lang.c (print_it_exception): Update fallouts of struct
    ui_out to class ui_out transition.
    (print_one_exception): Likewise.
    (print_mention_exception): Likewise.
    * ada-tasks.c (print_ada_task_info): Likewise.
    (info_task): Likewise.
    (task_command): Likewise.
    * auto-load.c (print_script): Likewise.
    (auto_load_info_scripts): Likewise.
    (info_auto_load_cmd): Likewise.
    * break-catch-sig.c (signal_catchpoint_print_one): Likewise.
    * break-catch-syscall.c (print_it_catch_syscall): Likewise.
    (print_one_catch_syscall): Likewise.
    * break-catch-throw.c (print_it_exception_catchpoint): Likewise.
    (print_one_exception_catchpoint): Likewise.
    (print_one_detail_exception_catchpoint): Likewise.
    (print_mention_exception_catchpoint): Likewise.
    * breakpoint.c (maybe_print_thread_hit_breakpoint): Likewise.
    (print_solib_event): Likewise.
    (watchpoint_check): Likewise.
    (wrap_indent_at_field): Likewise.
    (print_breakpoint_location): Likewise.
    (output_thread_groups): Likewise.
    (print_one_breakpoint_location): Likewise.
    (breakpoint_1): Likewise.
    (default_collect_info): Likewise.
    (watchpoints_info): Likewise.
    (print_it_catch_fork): Likewise.
    (print_one_catch_fork): Likewise.
    (print_it_catch_vfork): Likewise.
    (print_one_catch_vfork): Likewise.
    (print_it_catch_solib): Likewise.
    (print_one_catch_solib): Likewise.
    (print_it_catch_exec): Likewise.
    (print_one_catch_exec): Likewise.
    (mention): Likewise.
    (print_it_ranged_breakpoint): Likewise.
    (print_one_ranged_breakpoint): Likewise.
    (print_one_detail_ranged_breakpoint): Likewise.
    (print_mention_ranged_breakpoint): Likewise.
    (print_it_watchpoint): Likewise.
    (print_mention_watchpoint): Likewise.
    (print_it_masked_watchpoint): Likewise.
    (print_one_detail_masked_watchpoint): Likewise.
    (print_mention_masked_watchpoint): Likewise.
    (bkpt_print_it): Likewise.
    (tracepoint_print_one_detail): Likewise.
    (tracepoint_print_mention): Likewise.
    (update_static_tracepoint): Likewise.
    (tracepoints_info): Likewise.
    (save_breakpoints): Likewise.
    * cli/cli-cmds.c (complete_command): Likewise.
    * cli/cli-logging.c (set_logging_redirect): Likewise.
    (pop_output_files): Likewise.
    (handle_redirections): Likewise.
    * cli/cli-script.c (print_command_lines): Likewise.
    * cli/cli-setshow.c (do_show_command): Likewise.
    (cmd_show_list): Likewise.
    * cp-abi.c (list_cp_abis): Likewise.
    (show_cp_abi_cmd): Likewise.
    * darwin-nat-info.c (darwin_debug_regions_recurse): Likewise.
    * disasm.c (gdb_pretty_print_insn): Likewise.
    (do_mixed_source_and_assembly_deprecated): Likewise.
    (do_mixed_source_and_assembly): Likewise.
    * gdb_bfd.c (print_one_bfd): Likewise.
    (maintenance_info_bfds): Likewise.
    * guile/scm-breakpoint.c (gdbscm_breakpoint_commands): Likewise.
    * guile/scm-ports.c (ioscm_with_output_to_port_worker): Likewise.
    * i386-linux-tdep.c (i386_linux_handle_segmentation_fault): Likewise.
    * i386-tdep.c (i386_mpx_print_bounds): Likewise.
    * infcmd.c (run_command_1): Likewise.
    (print_return_value_1): Likewise.
    * inferior.c (print_selected_inferior): Likewise.
    (print_inferior): Likewise.
    * infrun.c (print_end_stepping_range_reason): Likewise.
    (print_signal_exited_reason): Likewise.
    (print_exited_reason): Likewise.
    (print_signal_received_reason): Likewise.
    (print_no_history_reason): Likewise.
    * interps.c (interp_set): Likewise.
    * linespec.c (decode_line_full): Likewise.
    * linux-thread-db.c (info_auto_load_libthread_db): Likewise.
    * mi/mi-cmd-env.c (mi_cmd_env_pwd): Likewise.
    (mi_cmd_env_path): Likewise.
    (mi_cmd_env_dir): Likewise.
    (mi_cmd_inferior_tty_show): Likewise.
    * mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_file): Likewise.
    (print_partial_file_name): Likewise.
    (mi_cmd_file_list_exec_source_files): Likewise.
    * mi/mi-cmd-info.c (mi_cmd_info_ada_exceptions): Likewise.
    (mi_cmd_info_gdb_mi_command): Likewise.
    * mi/mi-cmd-stack.c (mi_cmd_stack_info_depth): Likewise.
    (mi_cmd_stack_list_args): Likewise.
    (list_arg_or_local): Likewise.
    * mi/mi-cmd-var.c (print_varobj): Likewise.
    (mi_cmd_var_create): Likewise.
    (mi_cmd_var_delete): Likewise.
    (mi_cmd_var_set_format): Likewise.
    (mi_cmd_var_show_format): Likewise.
    (mi_cmd_var_info_num_children): Likewise.
    (mi_cmd_var_list_children): Likewise.
    (mi_cmd_var_info_type): Likewise.
    (mi_cmd_var_info_path_expression): Likewise.
    (mi_cmd_var_info_expression): Likewise.
    (mi_cmd_var_show_attributes): Likewise.
    (mi_cmd_var_evaluate_expression): Likewise.
    (mi_cmd_var_assign): Likewise.
    (varobj_update_one): Likewise.
    * mi/mi-interp.c (as_mi_interp): Likewise.
    (mi_on_normal_stop_1): Likewise.
    (mi_tsv_modified): Likewise.
    (mi_breakpoint_created): Likewise.
    (mi_breakpoint_modified): Likewise.
    (mi_solib_loaded): Likewise.
    (mi_solib_unloaded): Likewise.
    (mi_command_param_changed): Likewise.
    (mi_memory_changed): Likewise.
    (mi_user_selected_context_changed): Likewise.
    * mi/mi-main.c (print_one_inferior): Likewise.
    (output_cores): Likewise.
    (list_available_thread_groups): Likewise.
    (mi_cmd_data_list_register_names): Likewise.
    (mi_cmd_data_list_changed_registers): Likewise.
    (output_register): Likewise.
    (mi_cmd_data_evaluate_expression): Likewise.
    (mi_cmd_data_read_memory): Likewise.
    (mi_cmd_data_read_memory_bytes): Likewise.
    (mi_cmd_list_features): Likewise.
    (mi_cmd_list_target_features): Likewise.
    (mi_cmd_add_inferior): Likewise.
    (mi_execute_command): Likewise.
    (mi_load_progress): Likewise.
    (print_variable_or_computed): Likewise.
    (mi_cmd_trace_frame_collected): Likewise.
    * mi/mi-symbol-cmds.c (mi_cmd_symbol_list_lines): Likewise.
    * osdata.c (info_osdata_command): Likewise.
    * probe.c (gen_ui_out_table_header_info): Likewise.
    (print_ui_out_not_applicables): Likewise.
    (print_ui_out_info): Likewise.
    (info_probes_for_ops): Likewise.
    (enable_probes_command): Likewise.
    (disable_probes_command): Likewise.
    * progspace.c (print_program_space): Likewise.
    * python/py-breakpoint.c (bppy_get_commands): Likewise.
    * python/py-framefilter.c (py_print_type): Likewise.
    (py_print_value): Likewise.
    (py_print_single_arg): Likewise.
    (enumerate_args): Likewise.
    (enumerate_locals): Likewise.
    (py_print_args): Likewise.
    (py_print_frame): Likewise.
    * record-btrace.c (btrace_ui_out_decode_error): Likewise.
    (btrace_call_history_insn_range): Likewise.
    (btrace_call_history_src_line): Likewise.
    (btrace_call_history): Likewise.
    * remote.c (show_remote_cmd): Likewise.
    * skip.c (skip_info): Likewise.
    * solib.c (info_sharedlibrary_command): Likewise.
    * source.c (print_source_lines_base): Likewise.
    * spu-tdep.c (info_spu_event_command): Likewise.
    (info_spu_signal_command): Likewise.
    (info_spu_mailbox_list): Likewise.
    (info_spu_dma_cmdlist): Likewise.
    (info_spu_dma_command): Likewise.
    (info_spu_proxydma_command): Likewise.
    * stack.c (print_stack_frame): Likewise.
    (print_frame_arg): Likewise.
    (read_frame_arg): Likewise.
    (print_frame_args): Likewise.
    (print_frame_info): Likewise.
    (print_frame): Likewise.
    * symfile.c (load_progress): Likewise.
    (generic_load): Likewise.
    (print_transfer_performance): Likewise.
    * thread.c (do_captured_list_thread_ids): Likewise.
    (print_thread_info_1): Likewise.
    (restore_selected_frame): Likewise.
    (do_captured_thread_select): Likewise.
    (print_selected_thread_frame): Likewise.
    * top.c (execute_command_to_string): Likewise.
    * tracepoint.c (tvariables_info_1): Likewise.
    (trace_status_mi): Likewise.
    (tfind_1): Likewise.
    (print_one_static_tracepoint_marker): Likewise.
    (info_static_tracepoint_markers_command): Likewise.
    * utils.c (do_ui_out_redirect_pop): Likewise.
    (fputs_maybe_filtered): Likewise.

1 files changed, 112 insertions, 156 deletions

diff --git a/gdb/ui-out.h b/gdb/ui-out.h
index cdf567148fd..c7e0efb2e0b 100644
--- a/gdb/ui-out.h
+++ b/gdb/ui-out.h
@@ -23,11 +23,12 @@
 #ifndef UI_OUT_H
 #define UI_OUT_H 1
 
-#include "common/enum-flags.h"
+#include <vector>
 
-/* The ui_out structure */
+#include "common/enum-flags.h"
 
-struct ui_out;
+class ui_out_level;
+class ui_out_table;
 struct ui_file;
 
 /* the current ui_out */
@@ -65,23 +66,6 @@ enum ui_out_type
     ui_out_type_list
   };
 
-extern void ui_out_begin (struct ui_out *uiout,
-			  enum ui_out_type level_type,
-			  const char *id);
-
-extern void ui_out_end (struct ui_out *uiout, enum ui_out_type type);
-
-/* A table can be considered a special tuple/list combination with the
-   implied structure: ``table = { hdr = { header, ... } , body = [ {
-   field, ... }, ... ] }''.  If NR_ROWS is negative then there is at
-   least one row.  */
-extern void ui_out_table_header (struct ui_out *uiout, int width,
-				 enum ui_align align,
-				 const std::string &col_name,
-				 const std::string &col_hdr);
-
-extern void ui_out_table_body (struct ui_out *uiout);
-
 extern struct cleanup *make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out,
                                                             int nr_cols,
 							    int nr_rows,
@@ -94,141 +78,113 @@ extern struct cleanup *make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 extern struct cleanup *make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 							    const char *id);
 
-extern void ui_out_field_int (struct ui_out *uiout, const char *fldname,
-			      int value);
-
-extern void ui_out_field_fmt_int (struct ui_out *uiout, int width,
-				  enum ui_align align, const char *fldname, 
-		 		  int value);
-
-/* Output a field containing an address.  */
-
-extern void ui_out_field_core_addr (struct ui_out *uiout, const char *fldname,
-				    struct gdbarch *gdbarch, CORE_ADDR address);
-
-extern void ui_out_field_string (struct ui_out * uiout, const char *fldname,
-				 const char *string);
-
-extern void ui_out_field_stream (struct ui_out *uiout, const char *fldname,
-				 struct ui_file *stream);
-
-extern void ui_out_field_fmt (struct ui_out *uiout, const char *fldname,
-			      const char *format, ...)
-     ATTRIBUTE_PRINTF (3, 4);
-
-extern void ui_out_field_skip (struct ui_out *uiout, const char *fldname);
-
-extern void ui_out_spaces (struct ui_out *uiout, int numspaces);
-
-extern void ui_out_text (struct ui_out *uiout, const char *string);
-
-extern void ui_out_message (struct ui_out *uiout, const char *format, ...)
-     ATTRIBUTE_PRINTF (2, 3);
-
-extern void ui_out_wrap_hint (struct ui_out *uiout, const char *identstring);
-
-extern void ui_out_flush (struct ui_out *uiout);
-
-extern int ui_out_test_flags (struct ui_out *uiout, ui_out_flags mask);
-
-extern int ui_out_query_field (struct ui_out *uiout, int colno,
-			       int *width, int *alignment,
-			       const char **col_name);
-
-/* HACK: Code in GDB is currently checking to see the type of ui_out
-   builder when determining which output to produce.  This function is
-   a hack to encapsulate that test.  Once GDB manages to separate the
-   CLI/MI from the core of GDB the problem should just go away ....  */
-
-extern int ui_out_is_mi_like_p (struct ui_out *uiout);
-
-/* From here on we have things that are only needed by implementation
-   routines and main.c.   We should pehaps have a separate file for that,
-   like a  ui-out-impl.h  file.  */
-
-/* User Interface Output Implementation Function Table */
-
-/* Type definition of all implementation functions.  */
-
-typedef void (table_begin_ftype) (struct ui_out * uiout,
-				  int nbrofcols, int nr_rows,
-				  const char *tblid);
-typedef void (table_body_ftype) (struct ui_out * uiout);
-typedef void (table_end_ftype) (struct ui_out * uiout);
-typedef void (table_header_ftype) (struct ui_out * uiout, int width,
-				   enum ui_align align,
-				   const std::string &col_name,
-				   const std::string &col_hdr);
-
-typedef void (ui_out_begin_ftype) (struct ui_out *uiout,
-				   enum ui_out_type type,
-				   const char *id);
-typedef void (ui_out_end_ftype) (struct ui_out *uiout,
-				 enum ui_out_type type);
-typedef void (field_int_ftype) (struct ui_out * uiout, int fldno, int width,
-				enum ui_align align,
-				const char *fldname, int value);
-typedef void (field_skip_ftype) (struct ui_out * uiout, int fldno, int width,
-				 enum ui_align align,
-				 const char *fldname);
-typedef void (field_string_ftype) (struct ui_out * uiout, int fldno, int width,
-				   enum ui_align align,
-				   const char *fldname,
-				   const char *string);
-typedef void (field_fmt_ftype) (struct ui_out * uiout, int fldno, int width,
-				enum ui_align align,
-				const char *fldname,
-				const char *format,
-				va_list args) ATTRIBUTE_FPTR_PRINTF(6,0);
-typedef void (spaces_ftype) (struct ui_out * uiout, int numspaces);
-typedef void (text_ftype) (struct ui_out * uiout,
-			   const char *string);
-typedef void (message_ftype) (struct ui_out * uiout,
-			      const char *format, va_list args)
-     ATTRIBUTE_FPTR_PRINTF(2,0);
-typedef void (wrap_hint_ftype) (struct ui_out * uiout, const char *identstring);
-typedef void (flush_ftype) (struct ui_out * uiout);
-typedef int (redirect_ftype) (struct ui_out * uiout,
-			      struct ui_file * outstream);
-typedef void (data_destroy_ftype) (struct ui_out *uiout);
-
-/* ui-out-impl */
-
-struct ui_out_impl
-  {
-    table_begin_ftype *table_begin;
-    table_body_ftype *table_body;
-    table_end_ftype *table_end;
-    table_header_ftype *table_header;
-    ui_out_begin_ftype *begin;
-    ui_out_end_ftype *end;
-    field_int_ftype *field_int;
-    field_skip_ftype *field_skip;
-    field_string_ftype *field_string;
-    field_fmt_ftype *field_fmt;
-    spaces_ftype *spaces;
-    text_ftype *text;
-    message_ftype *message;
-    wrap_hint_ftype *wrap_hint;
-    flush_ftype *flush;
-    redirect_ftype *redirect;
-    data_destroy_ftype *data_destroy;
-    int is_mi_like_p;
-  };
-
-extern void *ui_out_data (struct ui_out *uiout);
-
-extern void uo_field_string (struct ui_out *uiout, int fldno, int width,
-			     enum ui_align align, const char *fldname,
-			     const char *string);
-
-/* Create a ui_out object */
-
-extern struct ui_out *ui_out_new (const struct ui_out_impl *impl, void *data,
-				  ui_out_flags flags);
-
-/* Redirect the ouptut of a ui_out object temporarily.  */
-
-extern int ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream);
+class ui_out
+{
+ public:
+
+  explicit ui_out (ui_out_flags flags = 0);
+  virtual ~ui_out ();
+
+  void push_level (ui_out_type type);
+  void pop_level (ui_out_type type);
+
+  /* A table can be considered a special tuple/list combination with the
+     implied structure: ``table = { hdr = { header, ... } , body = [ {
+     field, ... }, ... ] }''.  If NR_ROWS is negative then there is at
+     least one row.  */
+
+  void table_begin (int nr_cols, int nr_rows, const std::string &tblid);
+  void table_header (int width, ui_align align, const std::string &col_name,
+		     const std::string &col_hdr);
+  void table_body ();
+  void table_end ();
+
+  void begin (ui_out_type type, const char *id);
+  void end (ui_out_type type);
+
+  void field_int (const char *fldname, int value);
+  void field_fmt_int (int width, ui_align align, const char *fldname,
+		      int value);
+  void field_core_addr (const char *fldname, struct gdbarch *gdbarch,
+			CORE_ADDR address);
+  void field_string (const char *fldname, const char *string);
+  void field_stream (const char *fldname, ui_file *stream);
+  void field_skip (const char *fldname);
+  void field_fmt (const char *fldname, const char *format, ...)
+    ATTRIBUTE_PRINTF (3, 4);
+
+  void spaces (int numspaces);
+  void text (const char *string);
+  void message (const char *format, ...) ATTRIBUTE_PRINTF (2, 3);
+  void wrap_hint (const char *identstring);
+
+  void flush ();
+
+  /* Redirect the output of a ui_out object temporarily.  */
+  int redirect (ui_file *outstream);
+
+  ui_out_flags test_flags (ui_out_flags mask);
+
+  /* HACK: Code in GDB is currently checking to see the type of ui_out
+     builder when determining which output to produce.  This function is
+     a hack to encapsulate that test.  Once GDB manages to separate the
+     CLI/MI from the core of GDB the problem should just go away ....  */
+
+  bool is_mi_like_p ();
+
+  bool query_table_field (int colno, int *width, int *alignment,
+			  const char **col_name);
+
+ protected:
+
+  virtual void do_table_begin (int nbrofcols, int nr_rows, const char *tblid)
+    = 0;
+  virtual void do_table_body () = 0;
+  virtual void do_table_end () = 0;
+  virtual void do_table_header (int width, ui_align align,
+				const std::string &col_name,
+				const std::string &col_hdr) = 0;
+
+  virtual void do_begin (ui_out_type type, const char *id) = 0;
+  virtual void do_end (ui_out_type type) = 0;
+  virtual void do_field_int (int fldno, int width, ui_align align,
+			     const char *fldname, int value) = 0;
+  virtual void do_field_skip (int fldno, int width, ui_align align,
+			      const char *fldname) = 0;
+  virtual void do_field_string (int fldno, int width, ui_align align,
+				const char *fldname, const char *string) = 0;
+  virtual void do_field_fmt (int fldno, int width, ui_align align,
+			     const char *fldname, const char *format,
+			     va_list args)
+    ATTRIBUTE_PRINTF (6,0) = 0;
+  virtual void do_spaces (int numspaces) = 0;
+  virtual void do_text (const char *string) = 0;
+  virtual void do_message (const char *format, va_list args)
+    ATTRIBUTE_PRINTF (2,0) = 0;
+  virtual void do_wrap_hint (const char *identstring) = 0;
+  virtual void do_flush () = 0;
+  virtual int do_redirect (struct ui_file * outstream) = 0;
+
+  /* Set as not MI-like by default.  It is overridden in subclasses if
+     necessary.  */
+
+  virtual bool do_is_mi_like_p ()
+  { return false; }
+
+ private:
+
+  ui_out_flags m_flags;
+
+  /* Vector to store and track the ui-out levels.  */
+  std::vector<std::unique_ptr<ui_out_level>> m_levels;
+
+  /* A table, if any.  At present only a single table is supported.  */
+  std::unique_ptr<ui_out_table> m_table_up;
+
+  void verify_field (int *fldno, int *width, ui_align *align);
+
+  int level () const;
+  ui_out_level *current_level () const;
+};
 
 #endif /* UI_OUT_H */