Warn about unused values.

[bison.git] / tests / sets.at

diff --git a/tests/sets.at b/tests/sets.at
index c33985da208577678de2e9e7e1007aa28b595744..a731315b231e06386a62f5e5e8cd6f3565e93b85 100644 (file)
--- a/tests/sets.at
+++ b/tests/sets.at
@@ -252,3 +252,51 @@ FDERIVES
 ]])
 
 AT_CLEANUP
+
+
+
+
+## -------- ##
+## Accept.  ##
+## -------- ##
+
+# In some weird cases Bison could compute an incorrect final state
+# number.  This happens only if the $end token is used in the user
+# grammar, which is a very suspicious accidental feature introduced as
+# a side effect of allowing the user to name $end using `%token END 0
+# "end of file"'.
+
+AT_SETUP([Accept])
+
+AT_DATA([input.y],
+[[%token END 0
+%%
+input:
+  'a'
+| '(' input ')'
+| '(' error END
+;
+]])
+
+AT_CHECK([[bison -v -o input.c input.y]])
+
+# Get the final state in the parser.
+AT_CHECK([[sed -n 's/.*define YYFINAL *\([0-9][0-9]*\)/final state \1/p' input.c]],
+         0, [stdout])
+mv stdout expout
+
+# Get the final state in the report, from the "accept" action..
+AT_CHECK([sed -n '
+           /^state \(.*\)/{
+            s//final state \1/
+            x
+          }
+          / accept/{
+            x
+            p
+            q
+          }
+       ' input.output],
+       0, [expout])
+
+AT_CLEANUP