patch 8.0.1650: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_LISTCMDS, no reason to leave out buffer commands.

src/buffer.c

@@ -27,13 +27,9 @@
 
 #include "vim.h"
 
-#if defined(FEAT_CMDL_COMPL) || defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL)
 static char_u	*buflist_match(regmatch_T *rmp, buf_T *buf, int ignore_case);
-# define HAVE_BUFLIST_MATCH
 static char_u	*fname_match(regmatch_T *rmp, char_u *name, int ignore_case);
-#endif
 static void	buflist_setfpos(buf_T *buf, win_T *win, linenr_T lnum, colnr_T col, int copy_options);
-static wininfo_T *find_wininfo(buf_T *buf, int skip_diff_buffer);
 #ifdef UNIX
 static buf_T	*buflist_findname_stat(char_u *ffname, stat_T *st);
 static int	otherfile_buf(buf_T *buf, char_u *ffname, stat_T *stp);
@@ -948,7 +944,6 @@ clear_wininfo(buf_T *buf)
     }
 }
 
-#if defined(FEAT_LISTCMDS) || defined(FEAT_TERMINAL) || defined(PROTO)
 /*
  * Go to another buffer.  Handles the result of the ATTENTION dialog.
  */
@@ -959,42 +954,41 @@ goto_buffer(
     int		dir,
     int		count)
 {
-# if defined(HAS_SWAP_EXISTS_ACTION)
+#if defined(HAS_SWAP_EXISTS_ACTION)
     bufref_T	old_curbuf;
 
     set_bufref(&old_curbuf, curbuf);
 
     swap_exists_action = SEA_DIALOG;
-# endif
+#endif
     (void)do_buffer(*eap->cmd == 's' ? DOBUF_SPLIT : DOBUF_GOTO,
 					     start, dir, count, eap->forceit);
-# if defined(HAS_SWAP_EXISTS_ACTION)
+#if defined(HAS_SWAP_EXISTS_ACTION)
     if (swap_exists_action == SEA_QUIT && *eap->cmd == 's')
     {
-#  if defined(FEAT_EVAL)
+# if defined(FEAT_EVAL)
 	cleanup_T   cs;
 
 	/* Reset the error/interrupt/exception state here so that
 	 * aborting() returns FALSE when closing a window. */
 	enter_cleanup(&cs);
-#  endif
+# endif
 
 	/* Quitting means closing the split window, nothing else. */
 	win_close(curwin, TRUE);
 	swap_exists_action = SEA_NONE;
 	swap_exists_did_quit = TRUE;
 
-#  if defined(FEAT_EVAL)
+# if defined(FEAT_EVAL)
 	/* Restore the error/interrupt/exception state if not discarded by a
 	 * new aborting error, interrupt, or uncaught exception. */
 	leave_cleanup(&cs);
-#  endif
+# endif
     }
     else
 	handle_swap_exists(&old_curbuf);
-# endif
-}
 #endif
+}
 
 #if defined(HAS_SWAP_EXISTS_ACTION) || defined(PROTO)
 /*
@@ -1072,7 +1066,6 @@ handle_swap_exists(bufref_T *old_curbuf)
 }
 #endif
 
-#if defined(FEAT_LISTCMDS) || defined(PROTO)
 /*
  * do_bufdel() - delete or unload buffer(s)
  *
@@ -1199,10 +1192,6 @@ do_bufdel(
 
     return errormsg;
 }
-#endif /* FEAT_LISTCMDS */
-
-#if defined(FEAT_LISTCMDS) || defined(FEAT_PYTHON) \
-	|| defined(FEAT_PYTHON3) || defined(PROTO)
 
 static int	empty_curbuf(int close_others, int forceit, int action);
 
@@ -1359,7 +1348,6 @@ do_buffer(
     need_mouse_correct = TRUE;
 #endif
 
-#ifdef FEAT_LISTCMDS
     /*
      * delete buffer buf from memory and/or the list
      */
@@ -1377,7 +1365,7 @@ do_buffer(
 
 	if (!forceit && bufIsChanged(buf))
 	{
-# if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
 	    if ((p_confirm || cmdmod.confirm) && p_write)
 	    {
 		dialog_changed(buf, FALSE);
@@ -1391,7 +1379,7 @@ do_buffer(
 		    return FAIL;
 	    }
 	    else
-# endif
+#endif
 	    {
 		EMSGN(_("E89: No write since last change for buffer %ld (add ! to override)"),
 								 buf->b_fnum);
@@ -1557,7 +1545,6 @@ do_buffer(
 	if (win_split(0, 0) == FAIL)
 	    return FAIL;
     }
-#endif
 
     /* go to current buffer - nothing to do */
     if (buf == curbuf)
@@ -1590,12 +1577,10 @@ do_buffer(
     /* Go to the other buffer. */
     set_curbuf(buf, action);
 
-#if defined(FEAT_LISTCMDS)
     if (action == DOBUF_SPLIT)
     {
 	RESET_BINDING(curwin);	/* reset 'scrollbind' and 'cursorbind' */
     }
-#endif
 
 #if defined(FEAT_EVAL)
     if (aborting())	    /* autocmds may abort script processing */
@@ -1604,7 +1589,6 @@ do_buffer(
 
     return OK;
 }
-#endif
 
 /*
  * Set current buffer to "buf".  Executes autocommands and closes current
@@ -2411,8 +2395,6 @@ buflist_findname_stat(
     return NULL;
 }
 
-#if defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL) \
-	|| defined(PROTO)
 /*
  * Find file in buffer list by a regexp pattern.
  * Return fnum of the found buffer.
@@ -2534,7 +2516,6 @@ buflist_findpat(
 	EMSG2(_("E94: No matching buffer for %s"), pattern);
     return match;
 }
-#endif
 
 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
 
@@ -2644,7 +2625,6 @@ ExpandBufnames(
 
 #endif /* FEAT_CMDL_COMPL */
 
-#ifdef HAVE_BUFLIST_MATCH
 /*
  * Check for a match on the file name for buffer "buf" with regprog "prog".
  */
@@ -2695,7 +2675,6 @@ fname_match(
 
     return match;
 }
-#endif
 
 /*
  * Find a file in the buffer list by buffer number.
@@ -2940,7 +2919,6 @@ buflist_findlnum(buf_T *buf)
     return buflist_findfpos(buf)->lnum;
 }
 
-#if defined(FEAT_LISTCMDS) || defined(PROTO)
 /*
  * List all known file names (for :files and :buffers command).
  */
@@ -3024,7 +3002,6 @@ buflist_list(exarg_T *eap)
 	ui_breakcheck();
     }
 }
-#endif
 
 /*
  * Get file name and line number for file 'fnum'.
@@ -5095,7 +5072,6 @@ do_arg_all(
     vim_free(opened);
 }
 
-# if defined(FEAT_LISTCMDS) || defined(PROTO)
 /*
  * Open a window for a number of buffers.
  */
@@ -5300,7 +5276,6 @@ ex_buffer_all(exarg_T *eap)
 	}
     }
 }
-# endif /* FEAT_LISTCMDS */
 
 
 static int  chk_modeline(linenr_T, int);