[feature] Add -sac (space after cast) and -nsac options.

These control whether space character is put after a cast operator or not. Default is -nsac.

args.c

@@ -147,13 +147,15 @@ struct pro {
     {"npro", PRO_SPECIAL, 0, IGN, 0},
     {"npsl", PRO_BOOL, true, OFF, &procnames_start_line},
     {"nps", PRO_BOOL, false, OFF, &pointer_as_binop},
+    {"nsac", PRO_BOOL, false, OFF, &space_after_cast},
     {"nsc", PRO_BOOL, true, OFF, &star_comment_cont},
     {"nsob", PRO_BOOL, false, OFF, &swallow_optional_blanklines},
     {"nut", PRO_BOOL, true, OFF, &use_tabs},
     {"nv", PRO_BOOL, false, OFF, &verbose},
     {"pcs", PRO_BOOL, false, ON, &proc_calls_space},
     {"psl", PRO_BOOL, true, ON, &procnames_start_line},
     {"ps", PRO_BOOL, false, ON, &pointer_as_binop},
+    {"sac", PRO_BOOL, false, ON, &space_after_cast},
     {"sc", PRO_BOOL, true, ON, &star_comment_cont},
     {"sob", PRO_BOOL, false, ON, &swallow_optional_blanklines},
     {"st", PRO_SPECIAL, 0, STDIN, 0},

indent.1

@@ -74,6 +74,7 @@
 .Op Fl npro
 .Op Fl pcs | Fl npcs
 .Op Fl psl | Fl npsl
+.Op Fl sac | Fl nsac
 .Op Fl \&sc | Fl nsc
 .Bk -words
 .Op Fl sob | Fl nsob
@@ -378,6 +379,11 @@ column 1 \- their types, if any, will be left on the previous lines.
 The
 default is
 .Fl psl .
+.It Fl sac , nsac
+Control whether parenthesized type names in casts are followed by a space or
+not.
+The default is
+.Fl nsac .
 .It Fl \&sc , nsc
 Enables (disables) the placement of asterisks (`*'s) at the left edge of all
 comments.

indent.c

@@ -554,8 +554,9 @@ main(int argc, char **argv)
 	    if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.not_cast_mask) {
 		ps.last_u_d = true;
 		ps.cast_mask &= (1 << ps.p_l_follow) - 1;
-		ps.want_blank = false;
-	    } else
+		ps.want_blank = space_after_cast;
+	    }
+	    else
 		ps.want_blank = true;
 	    ps.not_cast_mask &= (1 << ps.p_l_follow) - 1;
 	    if (--ps.p_l_follow < 0) {

indent_globs.h

@@ -207,6 +207,7 @@ int	    use_tabs;			/* set true to use tabs for spacing,
 					 * false uses all spaces */
 int	    auto_typedefs;		/* set true to recognize identifiers
 					 * ending in "_t" like typedefs */
+int	    space_after_cast;		/* "b = (int) a" vs "b = (int)a" */
 
 /* -troff font state information */