patch 8.0.0369: a few options are not defined, depending on features

Problem:    The 'balloondelay', 'ballooneval' and 'balloonexpr' options are
            not defined without the +balloon_eval feature. Testing that an
            option value fails does not work for unsupported options.
Solution:   Make the options defined but not supported.  Don't test if
            setting unsupported options fails.

Author: brammool

src/gen_opt_test.vim

@@ -27,8 +27,8 @@ let test_values = {
       \ 'foldcolumn': [[0, 1, 4, 12], [-1, 13, 999]],
       \ 'helpheight': [[0, 10, 100], [-1]],
       \ 'history': [[0, 1, 100], [-1, 10001]],
-      \ 'iminsert': [[0, 1, 2], [-1, 3, 999]],
-      \ 'imsearch': [[-1, 0, 1, 2], [-2, 3, 999]],
+      \ 'iminsert': [[0, 1], [-1, 3, 999]],
+      \ 'imsearch': [[-1, 0, 1], [-2, 3, 999]],
       \ 'lines': [[2, 24], [-1, 0, 1]],
       \ 'numberwidth': [[1, 4, 8, 10], [-1, 0, 11]],
       \ 'regexpengine': [[0, 1, 2], [-1, 3, 999]],
@@ -170,10 +170,14 @@ while 1
 	call add(script, 'set ' . name . '=' . val)
 	call add(script, 'set ' . shortname . '=' . val)
       endfor
+
+      " setting an option can only fail when it's implemented.
+      call add(script, "if exists('+" . name . "')")
       for val in a[1]
 	call add(script, "call assert_fails('set " . name . "=" . val . "')")
 	call add(script, "call assert_fails('set " . shortname . "=" . val . "')")
       endfor
+      call add(script, "endif")
     endif
 
     call add(script, 'set ' . name . '&')

src/option.c

@@ -624,19 +624,33 @@ static struct vimoption options[] =
 			    {(char_u *)0L, (char_u *)0L}
 #endif
 			    SCRIPTID_INIT},
-#ifdef FEAT_BEVAL
     {"balloondelay","bdlay",P_NUM|P_VI_DEF,
+#ifdef FEAT_BEVAL
 			    (char_u *)&p_bdlay, PV_NONE,
-			    {(char_u *)600L, (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)600L, (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
+#endif
+			    SCRIPTID_INIT},
     {"ballooneval", "beval",P_BOOL|P_VI_DEF|P_NO_MKRC,
+#ifdef FEAT_BEVAL
 			    (char_u *)&p_beval, PV_NONE,
-			    {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
-# ifdef FEAT_EVAL
+			    {(char_u *)FALSE, (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
+#endif
+			    SCRIPTID_INIT},
     {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
+#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
 			    (char_u *)&p_bexpr, PV_BEXPR,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
-# endif
+			    {(char_u *)"", (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
 #endif
+			    SCRIPTID_INIT},
     {"beautify",    "bf",   P_BOOL|P_VI_DEF,
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    369,
 /**/
     368,
 /**/