patch 8.0.0034

Problem:    No completion for ":messages".
Solution:   Complete "clear" argument. (Hirohito Higashi)

runtime/doc/eval.txt

@@ -4287,7 +4287,9 @@ getcompletion({pat}, {type} [, {filtered}])		*getcompletion()*
 		locale		locale names (as output of locale -a)
 		mapping		mapping name
 		menu		menus
+		messages	|:messages| suboptions
 		option		options
+		packadd		optional package |pack-add| names
 		shellcmd	Shell command
 		sign		|:sign| suboptions
 		syntax		syntax file names |'syntax'|

runtime/doc/map.txt

@@ -1280,6 +1280,7 @@ completion can be enabled:
 	-complete=locale	locale names (as output of locale -a)
 	-complete=mapping	mapping name
 	-complete=menu		menus
+	-complete=messages	|:messages| suboptions
 	-complete=option	options
 	-complete=packadd	optional package |pack-add| names
 	-complete=shellcmd	Shell command

src/ex_docmd.c

@@ -4281,6 +4281,11 @@ set_one_cmd_context(
 	    xp->xp_pattern = arg;
 	    break;
 
+	case CMD_messages:
+	    xp->xp_context = EXPAND_MESSAGES;
+	    xp->xp_pattern = arg;
+	    break;
+
 #if defined(FEAT_CMDHIST)
 	case CMD_history:
 	    xp->xp_context = EXPAND_HISTORY;
@@ -5893,6 +5898,7 @@ static struct
 #endif
     {EXPAND_MAPPINGS, "mapping"},
     {EXPAND_MENUS, "menu"},
+    {EXPAND_MESSAGES, "messages"},
     {EXPAND_OWNSYNTAX, "syntax"},
 #if defined(FEAT_PROFILE)
     {EXPAND_SYNTIME, "syntime"},
@@ -11901,6 +11907,18 @@ get_behave_arg(expand_T *xp UNUSED, int idx)
 	return (char_u *)"xterm";
     return NULL;
 }
+
+/*
+ * Function given to ExpandGeneric() to obtain the possible arguments of the
+ * ":messages {clear}" command.
+ */
+    char_u *
+get_messages_arg(expand_T *xp UNUSED, int idx)
+{
+    if (idx == 0)
+	return (char_u *)"clear";
+    return NULL;
+}
 #endif
 
 #ifdef FEAT_AUTOCMD

src/ex_getln.c

@@ -4832,6 +4832,7 @@ ExpandFromContext(
 	{
 	    {EXPAND_COMMANDS, get_command_name, FALSE, TRUE},
 	    {EXPAND_BEHAVE, get_behave_arg, TRUE, TRUE},
+	    {EXPAND_MESSAGES, get_messages_arg, TRUE, TRUE},
 #ifdef FEAT_CMDHIST
 	    {EXPAND_HISTORY, get_history_arg, TRUE, TRUE},
 #endif

src/proto/ex_docmd.pro

@@ -61,4 +61,5 @@ int put_eol(FILE *fd);
 int put_line(FILE *fd, char *s);
 void dialog_msg(char_u *buff, char *format, char_u *fname);
 char_u *get_behave_arg(expand_T *xp, int idx);
+char_u *get_messages_arg(expand_T *xp, int idx);
 /* vim: set ft=c : */

src/testdir/test_cmdline.vim

@@ -129,6 +129,11 @@ func Test_getcompletion()
   let l = getcompletion('dark', 'highlight')
   call assert_equal([], l)
 
+  let l = getcompletion('', 'messages')
+  call assert_true(index(l, 'clear') >= 0)
+  let l = getcompletion('not', 'messages')
+  call assert_equal([], l)
+
   if has('cscope')
     let l = getcompletion('', 'cscope')
     let cmds = ['add', 'find', 'help', 'kill', 'reset', 'show']

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    34,
 /**/
     33,
 /**/

src/vim.h

@@ -793,6 +793,7 @@ extern char *(*dyn_libintl_textdomain)(const char *domainname);
 #define EXPAND_SYNTIME		43
 #define EXPAND_USER_ADDR_TYPE	44
 #define EXPAND_PACKADD		45
+#define EXPAND_MESSAGES		46
 
 /* Values for exmode_active (0 is no exmode) */
 #define EXMODE_NORMAL		1