doc-src/IsarAdvanced/Codegen/Thy/examples/bool_infix.ML
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Fri, 24 Aug 2007 14:14:17 +0200
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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 n (Suc m) = less_eq_nat n m
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  | less_nat n Zero_nat = false
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and less_eq_nat (Suc n) m = less_nat n m
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  | less_eq_nat Zero_nat m = 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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  Nat.less_eq_nat k n andalso Nat.less_eq_nat n l;
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end; (*struct Codegen*)