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doc-src/Tutorial/Ifexpr/bool2if
author wenzelm
Thu, 14 Dec 2000 19:37:09 +0100
changeset 10672 3b1c2d74a01b
parent 5377 efb799c5ed3c
permissions -rw-r--r--
use \<Sum> from main HOL;

consts bool2if :: boolex => ifex
primrec
"bool2if (Const b) = CIF b"
"bool2if (Var x)   = VIF x"
"bool2if (Neg b)   = IF (bool2if b) (CIF False) (CIF True)"
"bool2if (And b c) = IF (bool2if b) (bool2if c) (CIF False)"
isabelle