patch 8.0.1089: cannot get range count in user command

Problem:    Cannot get range count in user command.
Solution:   Add <range> argument.

runtime/doc/map.txt

@@ -1415,6 +1415,8 @@ The valid escape sequences are
 	<line1>	The starting line of the command range.
 						*<line2>*
 	<line2>	The final line of the command range.
+						*<range>*
+	<range> The number of items in the command range: 0, 1 or 2
 						*<count>*
 	<count>	Any count supplied (as described for the '-range'
 		and '-count' attributes).

src/ex_docmd.c

@@ -6331,7 +6331,8 @@ ex_command(exarg_T *eap)
     {
 	++p;
 	end = skiptowhite(p);
-	if (uc_scan_attr(p, end - p, &argt, &def, &flags, &compl, &compl_arg, &addr_type_arg)
+	if (uc_scan_attr(p, end - p, &argt, &def, &flags, &compl,
+						    &compl_arg, &addr_type_arg)
 		== FAIL)
 	    return;
 	p = skipwhite(end);
@@ -6372,7 +6373,7 @@ ex_command(exarg_T *eap)
     }
     else
 	uc_add_command(name, end - name, p, argt, def, flags, compl, compl_arg,
-								addr_type_arg, eap->forceit);
+						  addr_type_arg, eap->forceit);
 }
 
 /*
@@ -6592,8 +6593,18 @@ uc_check_code(
     char_u	*p = code + 1;
     size_t	l = len - 2;
     int		quote = 0;
-    enum { ct_ARGS, ct_BANG, ct_COUNT, ct_LINE1, ct_LINE2, ct_MODS,
-	ct_REGISTER, ct_LT, ct_NONE } type = ct_NONE;
+    enum {
+	ct_ARGS,
+	ct_BANG,
+	ct_COUNT,
+	ct_LINE1,
+	ct_LINE2,
+	ct_RANGE,
+	ct_MODS,
+	ct_REGISTER,
+	ct_LT,
+	ct_NONE
+    } type = ct_NONE;
 
     if ((vim_strchr((char_u *)"qQfF", *p) != NULL) && p[1] == '-')
     {
@@ -6615,6 +6626,8 @@ uc_check_code(
 	type = ct_LINE1;
     else if (STRNICMP(p, "line2>", l) == 0)
 	type = ct_LINE2;
+    else if (STRNICMP(p, "range>", l) == 0)
+	type = ct_RANGE;
     else if (STRNICMP(p, "lt>", l) == 0)
 	type = ct_LT;
     else if (STRNICMP(p, "reg>", l) == 0 || STRNICMP(p, "register>", l) == 0)
@@ -6716,11 +6729,13 @@ uc_check_code(
 
     case ct_LINE1:
     case ct_LINE2:
+    case ct_RANGE:
     case ct_COUNT:
     {
 	char num_buf[20];
 	long num = (type == ct_LINE1) ? eap->line1 :
 		   (type == ct_LINE2) ? eap->line2 :
+		   (type == ct_RANGE) ? eap->addr_count :
 		   (eap->addr_count > 0) ? eap->line2 : cmd->uc_def;
 	size_t num_len;
 

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1089,
 /**/
     1088,
 /**/