patch 8.2.3268: cannot use a block with :autocmd like with :command
Problem: Cannot use a block with :autocmd like with :command.
Solution: Add support for a {} block after :autocmd. (closes #8620)
diff --git a/src/vim.h b/src/vim.h
index 54d507e..7d23986 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2739,4 +2739,9 @@
// flags for equal_type()
#define ETYPE_ARG_UNKNOWN 1
+// flags used by user commands and :autocmd
+#define UC_BUFFER 1 // -buffer: local to current buffer
+#define UC_VIM9 2 // {} argument: Vim9 syntax.
+
+
#endif // VIM__H