author | wenzelm |
Wed, 19 Jul 2006 12:11:56 +0200 | |
changeset 20154 | c709a29f1363 |
parent 19922 | 984ae977f7aa |
child 20523 | 36a59e5d0039 |
permissions | -rw-r--r-- |
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First usable version of the new function definition package (HOL/function_packake/...).
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(* Title: HOL/Tools/function_package/lib.ML |
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First usable version of the new function definition package (HOL/function_packake/...).
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ID: $Id$ |
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First usable version of the new function definition package (HOL/function_packake/...).
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Author: Alexander Krauss, TU Muenchen |
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First usable version of the new function definition package (HOL/function_packake/...).
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First usable version of the new function definition package (HOL/function_packake/...).
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A package for general recursive function definitions. |
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First usable version of the new function definition package (HOL/function_packake/...).
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Some fairly general functions that should probably go somewhere else... |
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First usable version of the new function definition package (HOL/function_packake/...).
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*) |
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First usable version of the new function definition package (HOL/function_packake/...).
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First usable version of the new function definition package (HOL/function_packake/...).
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First usable version of the new function definition package (HOL/function_packake/...).
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fun mk_forall (var as Free (v,T)) t = |
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First usable version of the new function definition package (HOL/function_packake/...).
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all T $ Abs (v,T, abstract_over (var,t)) |
19922 | 12 |
| mk_forall v _ = let val _ = print v in sys_error "mk_forall" end |
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First usable version of the new function definition package (HOL/function_packake/...).
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First usable version of the new function definition package (HOL/function_packake/...).
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(* Builds a quantification with a new name for the variable. *) |
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fun mk_forall_rename (v as Free (_,T),newname) t = |
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all T $ Abs (newname, T, abstract_over (v, t)) |
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| mk_forall_rename (v, _) _ = let val _ = print v in sys_error "mk_forall_rename" end |
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19564
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First usable version of the new function definition package (HOL/function_packake/...).
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First usable version of the new function definition package (HOL/function_packake/...).
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(* Constructs a tupled abstraction from an arbitrarily nested tuple of variables and a term. *) |
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fun tupled_lambda vars t = |
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First usable version of the new function definition package (HOL/function_packake/...).
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case vars of |
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First usable version of the new function definition package (HOL/function_packake/...).
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(Free v) => lambda (Free v) t |
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First usable version of the new function definition package (HOL/function_packake/...).
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| (Var v) => lambda (Var v) t |
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| (Const ("Pair", Type ("fun", [Ta, Type ("fun", [Tb, _])]))) $ us $ vs => |
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(HOLogic.split_const (Ta,Tb, fastype_of t)) $ (tupled_lambda us (tupled_lambda vs t)) |
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| _ => raise Match |
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First usable version of the new function definition package (HOL/function_packake/...).
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fun dest_all (Const ("all", _) $ Abs (a as (_,T,_))) = |
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let |
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val (n, body) = Term.dest_abs a |
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in |
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(Free (n, T), body) |
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First usable version of the new function definition package (HOL/function_packake/...).
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end |
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| dest_all _ = raise Match |
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First usable version of the new function definition package (HOL/function_packake/...).
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(* Removes all quantifiers from a term, replacing bound variables by frees. *) |
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fun dest_all_all (t as (Const ("all",_) $ _)) = |
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First usable version of the new function definition package (HOL/function_packake/...).
krauss
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let |
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val (v,b) = dest_all t |
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val (vs, b') = dest_all_all b |
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in |
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(v :: vs, b') |
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First usable version of the new function definition package (HOL/function_packake/...).
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end |
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First usable version of the new function definition package (HOL/function_packake/...).
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| dest_all_all t = ([],t) |
d3e2f532459a
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krauss
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fun dest_all_all_ctx ctx (Const ("all", _) $ Abs (a as (n,T,b))) = |
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let |
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renamed Variable.rename_wrt to Variable.variant_frees;
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val [(n', _)] = Variable.variant_frees ctx [] [(n,T)] |
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val (_, ctx') = ProofContext.add_fixes_i [(n', SOME T, NoSyn)] ctx |
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val (n'', body) = Term.dest_abs (n', T, b) |
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val _ = assert (n' = n'') "dest_all_ctx" (* Note: We assume that n' does not occur in the body. Otherwise it would be fixed. *) |
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val (ctx'', vs, bd) = dest_all_all_ctx ctx' body |
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in |
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(ctx'', (n', T) :: vs, bd) |
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end |
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| dest_all_all_ctx ctx t = |
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(ctx, [], t) |
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First usable version of the new function definition package (HOL/function_packake/...).
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(* unfold *) |
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fun unfold P f g b x = if (P x) then ((f x)::(unfold P f g b (g x))) else (b x) |
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val dest_implies_list = |
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split_last o (unfold Logic.is_implies (fst o Logic.dest_implies) (snd o Logic.dest_implies) single) |
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fun implies_elim_swp a b = implies_elim b a |
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fun map3 _ [] [] [] = [] |
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| map3 f (x :: xs) (y :: ys) (z :: zs) = f x y z :: map3 f xs ys zs |
19841 | 76 |
| map3 _ _ _ _ = raise Library.UnequalLengths; |
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fun map6 _ [] [] [] [] [] [] = [] |
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| map6 f (x :: xs) (y :: ys) (z :: zs) (u :: us) (v :: vs) (w :: ws) = f x y z u v w :: map6 f xs ys zs us vs ws |
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| map6 _ _ _ _ _ _ _ = raise Library.UnequalLengths; |
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First usable version of the new function definition package (HOL/function_packake/...).
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(* forms all "unordered pairs": [1, 2, 3] ==> [(1, 1), (1, 2), (1, 3), (2, 2), (2, 3), (3, 3)] *) |
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fun unordered_pairs [] = [] |
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| unordered_pairs (x::xs) = map (pair x) (x::xs) @ unordered_pairs xs |
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19770
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HOL/Tools/function_package: Added support for mutual recursive definitions.
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be5c23ebe1eb
HOL/Tools/function_package: Added support for mutual recursive definitions.
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fun the_single [x] = x |
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| the_single _ = sys_error "the_single" |