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doc-src/Tutorial/Ifexpr/bool2if
author berghofe
Wed, 10 Jul 2002 18:39:15 +0200
changeset 13342 915d4d004643
parent 5377 efb799c5ed3c
permissions -rw-r--r--
expand_proof now also takes an optional term describing the proposition of the theorem to be expanded (to avoid problems with different theorems having the same names).
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consts bool2if :: boolex => ifex
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primrec
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"bool2if (Const b) = CIF b"
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"bool2if (Var x)   = VIF x"
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"bool2if (Neg b)   = IF (bool2if b) (CIF False) (CIF True)"
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"bool2if (And b c) = IF (bool2if b) (bool2if c) (CIF False)"
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