doc-src/Tutorial/Ifexpr/normal
author nipkow
Sun, 25 Jan 2004 00:42:22 +0100
changeset 14360 e654599b114e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Added an exception handler and error msg.

consts normal :: ifex => bool
primrec
"normal(CIF b) = True"
"normal(VIF x) = True"
"normal(IF b t e) = (normal t & normal e &
      (case b of CIF b => True | VIF x => True | IF x y z => False))"