Merge pull request #7069 from jbradaric/vim-8.0.0034

vim-patch:8.0.0034

runtime/doc/eval.txt

@@ -4046,7 +4046,9 @@ 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

@@ -1202,6 +1202,7 @@ 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/nvim/ex_docmd.c

@@ -3438,6 +3438,11 @@ const char * set_one_cmd_context(
     xp->xp_pattern = (char_u *)arg;
     break;
 
+  case CMD_messages:
+    xp->xp_context = EXPAND_MESSAGES;
+    xp->xp_pattern = (char_u *)arg;
+    break;
+
   case CMD_history:
     xp->xp_context = EXPAND_HISTORY;
     xp->xp_pattern = (char_u *)arg;
@@ -4872,6 +4877,7 @@ static struct {
 #endif
   { EXPAND_MAPPINGS, "mapping" },
   { EXPAND_MENUS, "menu" },
+  { EXPAND_MESSAGES, "messages" },
   { EXPAND_OWNSYNTAX, "syntax" },
   { EXPAND_SYNTIME, "syntime" },
   { EXPAND_SETTINGS, "option" },
@@ -9593,6 +9599,16 @@ char_u *get_behave_arg(expand_T *xp, int idx)
   return NULL;
 }
 
+// Function given to ExpandGeneric() to obtain the possible arguments of the
+// ":messages {clear}" command.
+char_u *get_messages_arg(expand_T *xp FUNC_ATTR_UNUSED, int idx)
+{
+  if (idx == 0) {
+    return (char_u *)"clear";
+  }
+  return NULL;
+}
+
 static TriState filetype_detect = kNone;
 static TriState filetype_plugin = kNone;
 static TriState filetype_indent = kNone;

src/nvim/ex_getln.c

@@ -4050,6 +4050,7 @@ ExpandFromContext (
     } tab[] = {
       { EXPAND_COMMANDS, get_command_name, false, true },
       { EXPAND_BEHAVE, get_behave_arg, true, true },
+      { EXPAND_MESSAGES, get_messages_arg, true, true },
       { EXPAND_HISTORY, get_history_arg, true, true },
       { EXPAND_USER_COMMANDS, get_user_commands, false, true },
       { EXPAND_USER_ADDR_TYPE, get_user_cmd_addr_type, false, true },

src/nvim/testdir/test_cmdline.vim

@@ -130,6 +130,11 @@ 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/nvim/version.c

@@ -695,7 +695,7 @@ static const int included_patches[] = {
   37,
   // 36 NA
   35,
-  // 34,
+  34,
   33,
   32,
   31,

src/nvim/vim.h

@@ -163,6 +163,7 @@ enum {
   EXPAND_SYNTIME,
   EXPAND_USER_ADDR_TYPE,
   EXPAND_PACKADD,
+  EXPAND_MESSAGES,
 };