POSIX: complain if %prec's token was not defined.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 8e3280a3544c68e49664dc84bbb91a7fdee10312..086325d5d159aea46e92c89f87aa0e5850ff897e 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -130,6 +130,12 @@ Bison News
   discussion of how to suppress C preprocessor warnings about YYFAIL
   being unused, see the Bison 2.4.2 NEWS entry.
 
+** `%prec IDENTIFIER' requires IDENTIFIER to be defined separately.
+
+  As promised in Bison 2.4.2's NEWS entry, it is now an error if a token
+  that appears after a %prec directive is not defined by %token, %left,
+  %right, or %nonassoc.  This is required by POSIX.
+
 ** Temporary hack for adding a semicolon to the user action.
 
   Previously, Bison appended a semicolon to every user action for