X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/c6abeab182fed54a2068fd75978a97f9c09d9da7..7d424de14c0385012d328642bec6874c8e6cef17:/tests/input.at

diff --git a/tests/input.at b/tests/input.at
index ab01cbe8..241c4d06 100644
--- a/tests/input.at
+++ b/tests/input.at
@@ -1,5 +1,6 @@
 # Checking the Bison scanner.                    -*- Autotest -*-
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
 # Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
@@ -794,6 +795,26 @@ AT_BISON_CHECK([input.y], [1], [],
 AT_CLEANUP
 
 
+## ------------------------------- ##
+## %prec's token must be defined.  ##
+## ------------------------------- ##
+
+AT_SETUP([[%prec's token must be defined]])
+
+# According to POSIX, a %prec token must be defined separately.
+
+AT_DATA([[input.y]],
+[[%%
+start: %prec PREC ;
+]])
+
+AT_BISON_CHECK([[input.y]], [[0]], [],
+[[input.y:2.8-17: warning: token for %prec is not defined: PREC
+]])
+
+AT_CLEANUP
+
+
 ## -------------------------------- ##
 ## Reject unused %code qualifiers.  ##
 ## -------------------------------- ##