diff -r 60b31a24f1a6 -r efb799c5ed3c doc-src/Tutorial/Ifexpr/boolex
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc-src/Tutorial/Ifexpr/boolex	Wed Aug 26 17:27:27 1998 +0200
@@ -0,0 +1,2 @@
+datatype boolex = Const bool | Var nat
+                | Neg boolex | And boolex boolex