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doc-src/Tutorial/Ifexpr/value
author wenzelm
Fri, 21 May 2004 21:27:42 +0200
changeset 14792 b7dac2fae5bb
parent 5377 efb799c5ed3c
permissions -rw-r--r--
added fold, product; removed transitive_closure;
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consts value :: boolex => (nat => bool) => bool
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primrec
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"value (Const b) env = b"
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"value (Var x)   env = env x"
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"value (Neg b)   env = (~ value b env)"
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"value (And b c) env = (value b env & value c env)"
isabelle