src/HOL/Main.thy
author webertj
Mon Mar 07 19:30:53 2005 +0100 (2005-03-07)
changeset 15584 3478bb4f93ff
parent 15531 08c8dad8e399
child 15872 8336ff711d80
permissions -rw-r--r--
refute_params: default value itself=1 added (for type classes)
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(*  Title:      HOL/Main.thy
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    ID:         $Id$
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    Author:     Stefan Berghofer, Tobias Nipkow, Tjark Weber, Markus Wenzel (TU Muenchen)
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*)
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header {* Main HOL *}
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theory Main
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    imports Extraction Refute Reconstruction
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begin
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text {*
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  Theory @{text Main} includes everything.  Note that theory @{text
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  PreList} already includes most HOL theories.
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*}
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subsection {* Configuration of the code generator *}
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types_code
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  "bool"  ("bool")
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consts_code
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  "True"    ("true")
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  "False"   ("false")
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  "Not"     ("not")
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  "op |"    ("(_ orelse/ _)")
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  "op &"    ("(_ andalso/ _)")
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  "If"      ("(if _/ then _/ else _)")
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  "wfrec"   ("wf'_rec?")
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quickcheck_params [default_type = int]
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ML {*
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fun wf_rec f x = f (wf_rec f) x;
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fun term_of_bool b = if b then HOLogic.true_const else HOLogic.false_const;
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val term_of_int = HOLogic.mk_int;
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fun term_of_fun_type _ T _ U _ = Free ("<function>", T --> U);
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val eq_codegen_setup = [Codegen.add_codegen "eq_codegen"
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  (fn thy => fn gr => fn dep => fn b => fn t =>
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    (case strip_comb t of
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       (Const ("op =", Type (_, [Type ("fun", _), _])), _) => NONE
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     | (Const ("op =", _), [t, u]) =>
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          let
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            val (gr', pt) = Codegen.invoke_codegen thy dep false (gr, t);
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            val (gr'', pu) = Codegen.invoke_codegen thy dep false (gr', u)
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          in
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            SOME (gr'', Codegen.parens
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              (Pretty.block [pt, Pretty.str " =", Pretty.brk 1, pu]))
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          end
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     | (t as Const ("op =", _), ts) => SOME (Codegen.invoke_codegen
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         thy dep b (gr, Codegen.eta_expand t ts 2))
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     | _ => NONE))];
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fun gen_bool i = one_of [false, true];
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fun gen_int i = one_of [~1, 1] * random_range 0 i;
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fun gen_fun_type _ G i =
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  let
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    val f = ref (fn x => raise ERROR);
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    val _ = (f := (fn x =>
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      let
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        val y = G i;
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        val f' = !f
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      in (f := (fn x' => if x = x' then y else f' x'); y) end))
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  in (fn x => !f x) end;
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*}
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setup eq_codegen_setup
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lemma [code]: "((n::nat) < 0) = False" by simp
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lemma [code]: "(0 < Suc n) = True" by simp
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lemmas [code] = Suc_less_eq imp_conv_disj
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subsection {* Configuration of the 'refute' command *}
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text {*
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  The following are fairly reasonable default values.  For an
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  explanation of these parameters, see 'HOL/Refute.thy'.
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*}
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refute_params ["itself"=1,
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               minsize=1,
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               maxsize=8,
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               maxvars=10000,
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               maxtime=60,
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               satsolver="auto"]
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end