1 files changed, 16 insertions, 9 deletions

diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 49dde537c3..f47c9c482b 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -8296,7 +8296,7 @@ static int search_cmn(typval_T *argvars, pos_T *match_pos, int *flagsp)
   // Repeat until {skip} returns false.
   for (;;) {
     subpatnum
-        = searchit(curwin, curbuf, &pos, NULL, dir, (char_u *)pat, 1, options, RE_SEARCH, &sia);
+      = searchit(curwin, curbuf, &pos, NULL, dir, (char_u *)pat, 1, options, RE_SEARCH, &sia);
     // finding the first match again means there is no match where {skip}
     // evaluates to zero.
     if (firstpos.lnum != 0 && equalpos(pos, firstpos)) {
@@ -9339,7 +9339,7 @@ static void set_qf_ll_list(win_T *wp, typval_T *args, typval_T *rettv)
 {
   static char *e_invact = N_("E927: Invalid action: '%s'");
   const char *title = NULL;
-  int action = ' ';
+  char action = ' ';
   static int recursive = 0;
   rettv->vval.v_number = -1;
   dict_T *what = NULL;
@@ -9569,7 +9569,6 @@ static int get_yank_type(char_u **const pp, MotionType *const yank_type, long *c
  */
 static void f_setreg(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
-  int regname;
   bool append = false;
   MotionType yank_type;
   long block_len;
@@ -9583,13 +9582,13 @@ static void f_setreg(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   if (strregname == NULL) {
     return;  // Type error; errmsg already given.
   }
-  regname = (uint8_t)(*strregname);
+  char regname = (uint8_t)(*strregname);
   if (regname == 0 || regname == '@') {
     regname = '"';
   }
 
   const typval_T *regcontents = NULL;
-  int pointreg = 0;
+  char pointreg = 0;
   if (argvars[1].v_type == VAR_DICT) {
     dict_T *const d = argvars[1].vval.v_dict;
 
@@ -9759,7 +9758,7 @@ static void f_settagstack(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   static char *e_invact2 = N_("E962: Invalid action: '%s'");
   win_T *wp;
   dict_T *d;
-  int action = 'r';
+  char action = 'r';
 
   rettv->vval.v_number = -1;
 
@@ -11409,14 +11408,22 @@ static void f_synIDattr(typval_T *argvars, typval_T *rettv, FunPtr fptr)
       p = highlight_has_attr(id, HL_STANDOUT, modec);
     }
     break;
-  case 'u':
-    if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c') {  // underline
+  case 'u': {
+    const size_t len = STRLEN(what);
+    if (len <= 5 || (TOLOWER_ASC(what[5]) == 'l' && len <= 9)) {  // underline
       p = highlight_has_attr(id, HL_UNDERLINE, modec);
-    } else {  // undercurl
+    } else if (TOLOWER_ASC(what[5]) == 'c') {  // undercurl
       p = highlight_has_attr(id, HL_UNDERCURL, modec);
+    } else if (len > 9 && TOLOWER_ASC(what[9]) == 'l') {  // underlineline
+      p = highlight_has_attr(id, HL_UNDERLINELINE, modec);
+    } else if (len > 6 && TOLOWER_ASC(what[6]) == 'o') {  // underdot
+      p = highlight_has_attr(id, HL_UNDERDOT, modec);
+    } else {  // underdash
+      p = highlight_has_attr(id, HL_UNDERDASH, modec);
     }
     break;
   }
+  }
 
   rettv->v_type = VAR_STRING;
   rettv->vval.v_string = (char_u *)(p == NULL ? p : xstrdup(p));