| author | haftmann |
| Tue, 03 Mar 2009 11:00:51 +0100 | |
| changeset 30209 | 2f4684e2ea95 |
| parent 26318 | doc-src/IsarAdvanced/Codegen/Thy/examples/bool_literal.ML@967323f93c67 |
| permissions | -rw-r--r-- |
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structure HOL = |
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struct |
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datatype boola = False | True; |
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fun anda x True = x |
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| anda x False = False |
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| anda True x = x |
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| anda False x = False; |
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end; (*struct HOL*) |
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structure Nat = |
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struct |
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datatype nat = Suc of nat | Zero_nat; |
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fun less_nat m (Suc n) = less_eq_nat m n |
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| less_nat n Zero_nat = HOL.False |
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and less_eq_nat (Suc m) n = less_nat m n |
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| less_eq_nat Zero_nat n = HOL.True; |
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end; (*struct Nat*) |
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structure Codegen = |
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struct |
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fun in_interval (k, l) n = |
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HOL.anda (Nat.less_eq_nat k n) (Nat.less_eq_nat n l); |
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end; (*struct Codegen*) |