NEWS and documentation for alias default-args related concept and commands.

[deliverable/binutils-gdb.git] / gdb / command.h

diff --git a/gdb/command.h b/gdb/command.h
index 2a190d449d56c11bb51335a5e42026f7f4758118..2cac5c8ced0c87f732ef66ad290b89985d39795b 100644 (file)
--- a/gdb/command.h
+++ b/gdb/command.h
@@ -1,6 +1,6 @@
 /* Header file for command creation.
 
 /* Header file for command creation.
 

-   Copyright (C) 1986-2017 Free Software Foundation, Inc.
+   Copyright (C) 1986-2020 Free Software Foundation, Inc.

 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by


@@ -18,8 +18,10 @@
 #if !defined (COMMAND_H)
 #define COMMAND_H 1
 
 #if !defined (COMMAND_H)
 #define COMMAND_H 1
 

-#include "gdb_vecs.h"
-#include "common/scoped_restore.h"
+#include "gdbsupport/gdb_vecs.h"
+#include "gdbsupport/scoped_restore.h"
+
+struct completion_tracker;

 
 /* This file defines the public interface for any code wanting to
    create commands.  */
 
 /* This file defines the public interface for any code wanting to
    create commands.  */


@@ -27,21 +29,46 @@
 /* Command classes are top-level categories into which commands are
    broken down for "help" purposes.
 
 /* Command classes are top-level categories into which commands are
    broken down for "help" purposes.
 

-   Notes on classes: class_alias is for alias commands which are not
-   abbreviations of the original command.  class-pseudo is for
-   commands which are not really commands nor help topics ("stop").  */
+   The class_alias is used for the user-defined aliases, defined
+   using the "alias" command.
+
+   Aliases pre-defined by GDB (e.g. the alias "bt" of the "backtrace" command)
+   are not using the class_alias.
+   Different pre-defined aliases of the same command do not necessarily
+   have the same classes.  For example, class_stack is used for the
+   "backtrace" and its "bt" alias", while "info stack" (also an alias
+   of "backtrace" uses class_info.  */

 
 enum command_class
 {
 
 enum command_class
 {

-  /* Special args to help_list */
-  class_deprecated = -3, all_classes = -2, all_commands = -1,
+  /* Classes of commands followed by a comment giving the name
+     to use in "help <classname>".
+     Note that help accepts unambiguous abbreviated class names.  */
+
+  /* Special classes to help_list */
+  class_deprecated = -3,
+  all_classes = -2,  /* help without <classname> */
+  all_commands = -1, /* all */
+

   /* Classes of commands */
   /* Classes of commands */

-  no_class = -1, class_run = 0, class_vars, class_stack, class_files,
-  class_support, class_info, class_breakpoint, class_trace,
-  class_alias, class_bookmark, class_obscure, class_maintenance,
-  class_pseudo, class_tui, class_user, class_xdb,
-  no_set_class /* Used for "show" commands that have no corresponding
-                  "set" command.  */
+  no_class = -1,
+  class_run = 0,     /* running */
+  class_vars,        /* data */
+  class_stack,       /* stack */
+  class_files,       /* files */
+  class_support,     /* support */
+  class_info,        /* status */
+  class_breakpoint,  /* breakpoints */
+  class_trace,       /* tracepoints */
+  class_alias,       /* aliases */
+  class_bookmark,
+  class_obscure,     /* obscure */
+  class_maintenance, /* internals */
+  class_tui,         /* text-user-interface */
+  class_user,        /* user-defined */
+
+  /* Used for "show" commands that have no corresponding "set" command.  */
+  no_set_class

 };
 
 /* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
 };
 
 /* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum


@@ -60,8 +87,8 @@ cmd_types;
 /* Types of "set" or "show" command.  */
 typedef enum var_types
   {
 /* Types of "set" or "show" command.  */
 typedef enum var_types
   {

-    /* "on" or "off".  *VAR is an integer which is nonzero for on,
-       zero for off.  */
+    /* "on" or "off".  *VAR is a bool which is true for on,
+       false for off.  */

     var_boolean,
 
     /* "on" / "true" / "enable" or "off" / "false" / "disable" or
     var_boolean,
 
     /* "on" / "true" / "enable" or "off" / "false" / "disable" or


@@ -114,7 +141,7 @@ var_types;
 /* This structure records one command'd definition.  */
 struct cmd_list_element;
 
 /* This structure records one command'd definition.  */
 struct cmd_list_element;
 

-typedef void cmd_cfunc_ftype (char *args, int from_tty);
+typedef void cmd_const_cfunc_ftype (const char *args, int from_tty);

 
 /* This structure specifies notifications to be suppressed by a cli
    command interpreter.  */
 
 /* This structure specifies notifications to be suppressed by a cli
    command interpreter.  */


@@ -131,13 +158,35 @@ extern struct cli_suppress_notification cli_suppress_notification;
 
 /* API to the manipulation of command lists.  */
 
 
 /* API to the manipulation of command lists.  */
 

-extern int valid_user_defined_cmd_name_p (const char *name);
+/* Return TRUE if NAME is a valid user-defined command name.
+   This is a stricter subset of all gdb commands,
+   see find_command_name_length.  */
+
+extern bool valid_user_defined_cmd_name_p (const char *name);
+
+/* Return TRUE if C is a valid command character.  */
+
+extern bool valid_cmd_char_p (int c);
+
+/* Const-correct variant of the above.  */
+
+extern struct cmd_list_element *add_cmd (const char *, enum command_class,
+                                        cmd_const_cfunc_ftype *fun,
+                                        const char *,
+                                        struct cmd_list_element **);
+
+/* Like add_cmd, but no command function is specified.  */

 
 extern struct cmd_list_element *add_cmd (const char *, enum command_class,
 
 extern struct cmd_list_element *add_cmd (const char *, enum command_class,

-                                        cmd_cfunc_ftype *fun,

                                         const char *,
                                         struct cmd_list_element **);
 
                                         const char *,
                                         struct cmd_list_element **);
 

+extern struct cmd_list_element *add_cmd_suppress_notification
+                       (const char *name, enum command_class theclass,
+                        cmd_const_cfunc_ftype *fun, const char *doc,
+                        struct cmd_list_element **list,
+                        int *suppress_notification);
+

 extern struct cmd_list_element *add_alias_cmd (const char *, const char *,
                                               enum command_class, int,
                                               struct cmd_list_element **);
 extern struct cmd_list_element *add_alias_cmd (const char *, const char *,
                                               enum command_class, int,
                                               struct cmd_list_element **);


@@ -149,32 +198,49 @@ extern struct cmd_list_element *add_alias_cmd (const char *,
 
 
 extern struct cmd_list_element *add_prefix_cmd (const char *, enum command_class,
 
 
 extern struct cmd_list_element *add_prefix_cmd (const char *, enum command_class,

-                                               cmd_cfunc_ftype *fun,
+                                               cmd_const_cfunc_ftype *fun,

                                                const char *,
                                                struct cmd_list_element **,
                                                const char *, int,
                                                struct cmd_list_element **);
 
                                                const char *,
                                                struct cmd_list_element **,
                                                const char *, int,
                                                struct cmd_list_element **);
 

+/* Like add_prefix_cmd, but sets the callback to a function that
+   simply calls help_list.  */
+
+extern struct cmd_list_element *add_basic_prefix_cmd
+  (const char *, enum command_class, const char *, struct cmd_list_element **,
+   const char *, int, struct cmd_list_element **);
+
+/* Like add_prefix_cmd, but useful for "show" prefixes.  This sets the
+   callback to a function that simply calls cmd_show_list.  */
+
+extern struct cmd_list_element *add_show_prefix_cmd
+  (const char *, enum command_class, const char *, struct cmd_list_element **,
+   const char *, int, struct cmd_list_element **);
+
+extern struct cmd_list_element *add_prefix_cmd_suppress_notification
+                       (const char *name, enum command_class theclass,
+                        cmd_const_cfunc_ftype *fun,
+                        const char *doc, struct cmd_list_element **prefixlist,
+                        const char *prefixname, int allow_unknown,
+                        struct cmd_list_element **list,
+                        int *suppress_notification);
+

 extern struct cmd_list_element *add_abbrev_prefix_cmd (const char *,
                                                       enum command_class,
 extern struct cmd_list_element *add_abbrev_prefix_cmd (const char *,
                                                       enum command_class,

-                                                      cmd_cfunc_ftype *fun,
+                                                      cmd_const_cfunc_ftype *fun,

                                                       const char *,
                                                       struct cmd_list_element
                                                       **, const char *, int,
                                                       struct cmd_list_element
                                                       **);
 
                                                       const char *,
                                                       struct cmd_list_element
                                                       **, const char *, int,
                                                       struct cmd_list_element
                                                       **);
 

-/* Set the commands corresponding callback.  */
-
-extern void set_cmd_cfunc (struct cmd_list_element *cmd,
-                          cmd_cfunc_ftype *cfunc);
-
-typedef void cmd_sfunc_ftype (char *args, int from_tty,
-                             struct cmd_list_element *c);
+typedef void cmd_const_sfunc_ftype (const char *args, int from_tty,
+                                   struct cmd_list_element *c);

 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 extern void set_cmd_sfunc (struct cmd_list_element *cmd,

-                          cmd_sfunc_ftype *sfunc);
+                          cmd_const_sfunc_ftype *sfunc);

 
 

-/* A completion routine.  Return a list of possible completions.
+/* A completion routine.  Add possible completions to tracker.

 
    TEXT is the text beyond what was matched for the command itself
    (leading whitespace is skipped).  It stops where we are supposed to
 
    TEXT is the text beyond what was matched for the command itself
    (leading whitespace is skipped).  It stops where we are supposed to


@@ -183,11 +249,13 @@ extern void set_cmd_sfunc (struct cmd_list_element *cmd,
    relative to this position.  For example, suppose TEXT is "foo" and
    we want to complete to "foobar".  If WORD is "oo", return "oobar";
    if WORD is "baz/foo", return "baz/foobar".  */
    relative to this position.  For example, suppose TEXT is "foo" and
    we want to complete to "foobar".  If WORD is "oo", return "oobar";
    if WORD is "baz/foo", return "baz/foobar".  */

-typedef VEC (char_ptr) *completer_ftype (struct cmd_list_element *,
-                                        const char *text, const char *word);
+typedef void completer_ftype (struct cmd_list_element *,
+                             completion_tracker &tracker,
+                             const char *text, const char *word);

 
 /* Same, but for set_cmd_completer_handle_brkchars.  */
 typedef void completer_handle_brkchars_ftype (struct cmd_list_element *,
 
 /* Same, but for set_cmd_completer_handle_brkchars.  */
 typedef void completer_handle_brkchars_ftype (struct cmd_list_element *,

+                                             completion_tracker &tracker,

                                              const char *text, const char *word);
 
 extern void set_cmd_completer (struct cmd_list_element *, completer_ftype *);
                                              const char *text, const char *word);
 
 extern void set_cmd_completer (struct cmd_list_element *, completer_ftype *);


@@ -200,7 +268,7 @@ extern void set_cmd_completer_handle_brkchars (struct cmd_list_element *,
 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
    around in cmd objects to test the value of the commands sfunc().  */
 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
    around in cmd objects to test the value of the commands sfunc().  */
 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,

-                        cmd_cfunc_ftype *cfun);
+                        cmd_const_cfunc_ftype *cfun);

 
 /* Each command object has a local context attached to it.  */
 extern void set_cmd_context (struct cmd_list_element *cmd,
 
 /* Each command object has a local context attached to it.  */
 extern void set_cmd_context (struct cmd_list_element *cmd,


@@ -223,11 +291,13 @@ extern enum cmd_types cmd_type (struct cmd_list_element *cmd);
 extern struct cmd_list_element *lookup_cmd (const char **,
                                            struct cmd_list_element *,
                                            const char *,
 extern struct cmd_list_element *lookup_cmd (const char **,
                                            struct cmd_list_element *,
                                            const char *,

+                                           std::string *,

                                            int, int);
 
 extern struct cmd_list_element *lookup_cmd_1 (const char **,
                                              struct cmd_list_element *,
                                              struct cmd_list_element **,
                                            int, int);
 
 extern struct cmd_list_element *lookup_cmd_1 (const char **,
                                              struct cmd_list_element *,
                                              struct cmd_list_element **,

+                                             std::string *,

                                              int);
 
 extern struct cmd_list_element *deprecate_cmd (struct cmd_list_element *,
                                              int);
 
 extern struct cmd_list_element *deprecate_cmd (struct cmd_list_element *,


@@ -241,7 +311,7 @@ extern int lookup_cmd_composition (const char *text,
                                   struct cmd_list_element **cmd);
 
 extern struct cmd_list_element *add_com (const char *, enum command_class,
                                   struct cmd_list_element **cmd);
 
 extern struct cmd_list_element *add_com (const char *, enum command_class,

-                                        cmd_cfunc_ftype *fun,
+                                        cmd_const_cfunc_ftype *fun,

                                         const char *);
 
 extern struct cmd_list_element *add_com_alias (const char *, const char *,
                                         const char *);
 
 extern struct cmd_list_element *add_com_alias (const char *, const char *,


@@ -249,21 +319,23 @@ extern struct cmd_list_element *add_com_alias (const char *, const char *,
 
 extern struct cmd_list_element *add_com_suppress_notification
                       (const char *name, enum command_class theclass,
 
 extern struct cmd_list_element *add_com_suppress_notification
                       (const char *name, enum command_class theclass,

-                       cmd_cfunc_ftype *fun, const char *doc,
+                       cmd_const_cfunc_ftype *fun, const char *doc,

                        int *supress_notification);
 
 extern struct cmd_list_element *add_info (const char *,
                        int *supress_notification);
 
 extern struct cmd_list_element *add_info (const char *,

-                                         cmd_cfunc_ftype *fun,
+                                         cmd_const_cfunc_ftype *fun,

                                          const char *);
 
 extern struct cmd_list_element *add_info_alias (const char *, const char *,
                                                int);
 
                                          const char *);
 
 extern struct cmd_list_element *add_info_alias (const char *, const char *,
                                                int);
 

-extern VEC (char_ptr) *complete_on_cmdlist (struct cmd_list_element *,
-                                           const char *, const char *, int);
+extern void complete_on_cmdlist (struct cmd_list_element *,
+                                completion_tracker &tracker,
+                                const char *, const char *, int);

 
 

-extern VEC (char_ptr) *complete_on_enum (const char *const *enumlist,
-                                        const char *, const char *);
+extern void complete_on_enum (completion_tracker &tracker,
+                             const char *const *enumlist,
+                             const char *, const char *);

 
 /* Functions that implement commands about CLI commands.  */
 
 
 /* Functions that implement commands about CLI commands.  */
 


@@ -288,10 +360,11 @@ extern void add_setshow_enum_cmd (const char *name,
                                  const char *set_doc,
                                  const char *show_doc,
                                  const char *help_doc,
                                  const char *set_doc,
                                  const char *show_doc,
                                  const char *help_doc,

-                                 cmd_sfunc_ftype *set_func,
+                                 cmd_const_sfunc_ftype *set_func,

                                  show_value_ftype *show_func,
                                  struct cmd_list_element **set_list,
                                  show_value_ftype *show_func,
                                  struct cmd_list_element **set_list,

-                                 struct cmd_list_element **show_list);
+                                 struct cmd_list_element **show_list,
+                                 void *context = nullptr);

 
 extern void add_setshow_auto_boolean_cmd (const char *name,
                                          enum command_class theclass,
 
 extern void add_setshow_auto_boolean_cmd (const char *name,
                                          enum command_class theclass,


@@ -299,20 +372,21 @@ extern void add_setshow_auto_boolean_cmd (const char *name,
                                          const char *set_doc,
                                          const char *show_doc,
                                          const char *help_doc,
                                          const char *set_doc,
                                          const char *show_doc,
                                          const char *help_doc,

-                                         cmd_sfunc_ftype *set_func,
+                                         cmd_const_sfunc_ftype *set_func,

                                          show_value_ftype *show_func,
                                          struct cmd_list_element **set_list,
                                          struct cmd_list_element **show_list);
 
                                          show_value_ftype *show_func,
                                          struct cmd_list_element **set_list,
                                          struct cmd_list_element **show_list);
 

-extern void add_setshow_boolean_cmd (const char *name,
-                                    enum command_class theclass,
-                                    int *var,
-                                    const char *set_doc, const char *show_doc,
-                                    const char *help_doc,
-                                    cmd_sfunc_ftype *set_func,
-                                    show_value_ftype *show_func,
-                                    struct cmd_list_element **set_list,
-                                    struct cmd_list_element **show_list);
+extern cmd_list_element *
+  add_setshow_boolean_cmd (const char *name,
+                          enum command_class theclass,
+                          bool *var,
+                          const char *set_doc, const char *show_doc,
+                          const char *help_doc,
+                          cmd_const_sfunc_ftype *set_func,
+                          show_value_ftype *show_func,
+                          struct cmd_list_element **set_list,
+                          struct cmd_list_element **show_list);

 
 extern void add_setshow_filename_cmd (const char *name,
                                      enum command_class theclass,
 
 extern void add_setshow_filename_cmd (const char *name,
                                      enum command_class theclass,


@@ -320,7 +394,7 @@ extern void add_setshow_filename_cmd (const char *name,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,

-                                     cmd_sfunc_ftype *set_func,
+                                     cmd_const_sfunc_ftype *set_func,

                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);
                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);


@@ -331,7 +405,7 @@ extern void add_setshow_string_cmd (const char *name,
                                    const char *set_doc,
                                    const char *show_doc,
                                    const char *help_doc,
                                    const char *set_doc,
                                    const char *show_doc,
                                    const char *help_doc,

-                                   cmd_sfunc_ftype *set_func,
+                                   cmd_const_sfunc_ftype *set_func,

                                    show_value_ftype *show_func,
                                    struct cmd_list_element **set_list,
                                    struct cmd_list_element **show_list);
                                    show_value_ftype *show_func,
                                    struct cmd_list_element **set_list,
                                    struct cmd_list_element **show_list);


@@ -343,7 +417,7 @@ extern struct cmd_list_element *add_setshow_string_noescape_cmd
                       const char *set_doc,
                       const char *show_doc,
                       const char *help_doc,
                       const char *set_doc,
                       const char *show_doc,
                       const char *help_doc,

-                      cmd_sfunc_ftype *set_func,
+                      cmd_const_sfunc_ftype *set_func,

                       show_value_ftype *show_func,
                       struct cmd_list_element **set_list,
                       struct cmd_list_element **show_list);
                       show_value_ftype *show_func,
                       struct cmd_list_element **set_list,
                       struct cmd_list_element **show_list);


@@ -354,7 +428,7 @@ extern void add_setshow_optional_filename_cmd (const char *name,
                                               const char *set_doc,
                                               const char *show_doc,
                                               const char *help_doc,
                                               const char *set_doc,
                                               const char *show_doc,
                                               const char *help_doc,

-                                              cmd_sfunc_ftype *set_func,
+                                              cmd_const_sfunc_ftype *set_func,

                                               show_value_ftype *show_func,
                                               struct cmd_list_element **set_list,
                                               struct cmd_list_element **show_list);
                                               show_value_ftype *show_func,
                                               struct cmd_list_element **set_list,
                                               struct cmd_list_element **show_list);


@@ -365,7 +439,7 @@ extern void add_setshow_integer_cmd (const char *name,
                                     const char *set_doc,
                                     const char *show_doc,
                                     const char *help_doc,
                                     const char *set_doc,
                                     const char *show_doc,
                                     const char *help_doc,

-                                    cmd_sfunc_ftype *set_func,
+                                    cmd_const_sfunc_ftype *set_func,

                                     show_value_ftype *show_func,
                                     struct cmd_list_element **set_list,
                                     struct cmd_list_element **show_list);
                                     show_value_ftype *show_func,
                                     struct cmd_list_element **set_list,
                                     struct cmd_list_element **show_list);


@@ -376,7 +450,7 @@ extern void add_setshow_uinteger_cmd (const char *name,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,

-                                     cmd_sfunc_ftype *set_func,
+                                     cmd_const_sfunc_ftype *set_func,

                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);
                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);


@@ -387,7 +461,7 @@ extern void add_setshow_zinteger_cmd (const char *name,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,
                                      const char *set_doc,
                                      const char *show_doc,
                                      const char *help_doc,

-                                     cmd_sfunc_ftype *set_func,
+                                     cmd_const_sfunc_ftype *set_func,

                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);
                                      show_value_ftype *show_func,
                                      struct cmd_list_element **set_list,
                                      struct cmd_list_element **show_list);


@@ -398,7 +472,7 @@ extern void add_setshow_zuinteger_cmd (const char *name,
                                       const char *set_doc,
                                       const char *show_doc,
                                       const char *help_doc,
                                       const char *set_doc,
                                       const char *show_doc,
                                       const char *help_doc,

-                                      cmd_sfunc_ftype *set_func,
+                                      cmd_const_sfunc_ftype *set_func,

                                       show_value_ftype *show_func,
                                       struct cmd_list_element **set_list,
                                       struct cmd_list_element **show_list);
                                       show_value_ftype *show_func,
                                       struct cmd_list_element **set_list,
                                       struct cmd_list_element **show_list);


@@ -410,35 +484,77 @@ extern void
                                       const char *set_doc,
                                       const char *show_doc,
                                       const char *help_doc,
                                       const char *set_doc,
                                       const char *show_doc,
                                       const char *help_doc,

-                                      cmd_sfunc_ftype *set_func,
+                                      cmd_const_sfunc_ftype *set_func,

                                       show_value_ftype *show_func,
                                       struct cmd_list_element **set_list,
                                       struct cmd_list_element **show_list);
 
 /* Do a "show" command for each thing on a command list.  */
 
                                       show_value_ftype *show_func,
                                       struct cmd_list_element **set_list,
                                       struct cmd_list_element **show_list);
 
 /* Do a "show" command for each thing on a command list.  */
 

-extern void cmd_show_list (struct cmd_list_element *, int, const char *);
+extern void cmd_show_list (struct cmd_list_element *, int);

 
 /* Used everywhere whenever at least one parameter is required and
    none is specified.  */
 
 extern void error_no_arg (const char *) ATTRIBUTE_NORETURN;
 
 
 /* Used everywhere whenever at least one parameter is required and
    none is specified.  */
 
 extern void error_no_arg (const char *) ATTRIBUTE_NORETURN;
 

-extern void dont_repeat (void);
+
+/* Command line saving and repetition.
+   Each input line executed is saved to possibly be repeated either
+   when the user types an empty line, or be repeated by a command
+   that wants to repeat the previously executed command.  The below
+   functions control command repetition.  */
+
+/* Commands call dont_repeat if they do not want to be repeated by null
+   lines or by repeat_previous ().  */
+
+extern void dont_repeat ();
+
+/* Commands call repeat_previous if they want to repeat the previous
+   command.  Such commands that repeat the previous command must
+   indicate to not repeat themselves, to avoid recursive repeat.
+   repeat_previous marks the current command as not repeating, and
+   ensures get_saved_command_line returns the previous command, so
+   that the currently executing command can repeat it.  If there's no
+   previous command, throws an error.  Otherwise, returns the result
+   of get_saved_command_line, which now points at the command to
+   repeat.  */
+
+extern const char *repeat_previous ();
+
+/* Prevent dont_repeat from working, and return a cleanup that
+   restores the previous state.  */

 
 extern scoped_restore_tmpl<int> prevent_dont_repeat (void);
 
 
 extern scoped_restore_tmpl<int> prevent_dont_repeat (void);
 

+/* Set the arguments that will be passed if the current command is
+   repeated.  Note that the passed-in string must be a constant.  */
+
+extern void set_repeat_arguments (const char *args);
+
+/* Returns the saved command line to repeat.
+   When a command is being executed, this is the currently executing
+   command line, unless the currently executing command has called
+   repeat_previous (): in this case, get_saved_command_line returns
+   the previously saved command line.  */
+
+extern char *get_saved_command_line ();
+
+/* Takes a copy of CMD, for possible repetition.  */
+
+extern void save_command_line (const char *cmd);
+

 /* Used to mark commands that don't do anything.  If we just leave the
    function field NULL, the command is interpreted as a help topic, or
    as a class of commands.  */
 
 /* Used to mark commands that don't do anything.  If we just leave the
    function field NULL, the command is interpreted as a help topic, or
    as a class of commands.  */
 

-extern void not_just_help_class_command (char *, int);
+extern void not_just_help_class_command (const char *, int);

 
 /* Check function pointer.  */
 extern int cmd_func_p (struct cmd_list_element *cmd);
 
 /* Call the command function.  */
 extern void cmd_func (struct cmd_list_element *cmd,
 
 /* Check function pointer.  */
 extern int cmd_func_p (struct cmd_list_element *cmd);
 
 /* Call the command function.  */
 extern void cmd_func (struct cmd_list_element *cmd,

-                     char *args, int from_tty);
+                     const char *args, int from_tty);

 
 #endif /* !defined (COMMAND_H) */
 
 #endif /* !defined (COMMAND_H) */