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src/HOL/Tools/function_package/fundef_lib.ML
changeset 19770 be5c23ebe1eb
parent 19564 d3e2f532459a
child 19841 f2fa72c13186 
--- a/src/HOL/Tools/function_package/fundef_lib.ML	Mon Jun 05 14:22:58 2006 +0200
+++ b/src/HOL/Tools/function_package/fundef_lib.ML	Mon Jun 05 14:26:07 2006 +0200
@@ -62,3 +62,6 @@
 fun upairs [] = []
   | upairs (x::xs) = map (pair x) (x::xs) @ upairs xs
 
+
+fun the_single [x] = x
+  | the_single _ = sys_error "the_single"
\ No newline at end of file
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