author | huffman |
Mon, 12 Sep 2005 23:14:41 +0200 | |
changeset 17332 | 4910cf8c0cd2 |
parent 17329 | 72637e062a0d |
child 17333 | 605c97701833 |
permissions | -rw-r--r-- |
17329 | 1 |
signature TRANSFER_TAC = |
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sig |
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val transfer_tac: thm list -> int -> tactic |
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val setup: (theory -> theory) list |
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end; |
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structure Transfer: TRANSFER_TAC = |
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struct |
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(* TODO: make this list extensible *) |
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val star_consts = |
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[ "StarType.star_of", "StarType.Ifun" |
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, "StarType.unstar", "StarType.Iset" ] |
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structure TransferData = TheoryDataFun |
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(struct |
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val name = "HOL/transfer"; |
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type T = { |
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intros: thm list, |
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unfolds: thm list, |
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refolds: thm list, |
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consts: string list |
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}; |
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val empty = {intros = [], unfolds = [], refolds = [], consts = star_consts}; |
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val copy = I; |
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val extend = I; |
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fun merge _ |
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({intros = intros1, unfolds = unfolds1, |
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refolds = refolds1, consts = consts1}, |
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{intros = intros2, unfolds = unfolds2, |
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refolds = refolds2, consts = consts2}) = |
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{intros = Drule.merge_rules (intros1, intros2), |
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unfolds = Drule.merge_rules (unfolds1, unfolds2), |
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refolds = Drule.merge_rules (refolds1, refolds2), |
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consts = merge_lists consts1 consts2}; |
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fun print _ _ = (); |
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end); |
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val transfer_start = thm "transfer_start" |
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fun unstar_typ (Type ("StarType.star",[t])) = unstar_typ t |
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| unstar_typ (Type (a, Ts)) = Type (a, map unstar_typ Ts) |
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| unstar_typ T = T |
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fun unstar_term consts term = |
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let |
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fun delete a = exists (fn x => x = a) consts |
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fun unstar (Const(a,T) $ t) = if (delete a) then (unstar t) |
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else (Const(a,unstar_typ T) $ unstar t) |
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| unstar (f $ t) = unstar f $ unstar t |
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| unstar (Const(a,T)) = Const(a,unstar_typ T) |
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| unstar (Abs(a,T,t)) = Abs(a,unstar_typ T,unstar t) |
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| unstar t = t |
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in |
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unstar term |
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end |
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val atomizers = map thm ["atomize_all", "atomize_imp", "atomize_eq"] |
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fun transfer_thm_of thy ths t = |
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let |
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val {intros,unfolds,refolds,consts} = TransferData.get thy |
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val (_$_$t') = concl_of (Tactic.rewrite true unfolds (cterm_of thy t)) |
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val u = unstar_term consts t' |
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val ct = cterm_of thy (Logic.mk_equals (t,u)) |
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val tacs = |
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[ rewrite_goals_tac atomizers |
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, match_tac [transitive_thm] 1 |
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, resolve_tac [transfer_start] 1 |
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, REPEAT_ALL_NEW (resolve_tac intros) 1 |
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, match_tac [reflexive_thm] 1 ] |
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in |
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prove_goalw_cterm (ths @ refolds @ unfolds) ct (fn _ => tacs) |
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end |
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fun transfer_tac ths = |
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SUBGOAL (fn (t,i) => |
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(fn th => |
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let val thy = theory_of_thm th |
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val tr = transfer_thm_of thy ths t |
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in rewrite_goals_tac [tr] th |
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end |
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) |
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) |
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local |
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fun map_intros f = TransferData.map |
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(fn {intros,unfolds,refolds,consts} => |
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{intros=f intros, unfolds=unfolds, refolds=refolds, consts=consts}) |
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fun map_unfolds f = TransferData.map |
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(fn {intros,unfolds,refolds,consts} => |
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{intros=intros, unfolds=f unfolds, refolds=refolds, consts=consts}) |
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fun map_refolds f = TransferData.map |
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(fn {intros,unfolds,refolds,consts} => |
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{intros=intros, unfolds=unfolds, refolds=f refolds, consts=consts}) |
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fun map_consts f = TransferData.map |
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(fn {intros,unfolds,refolds,consts} => |
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{intros=intros, unfolds=unfolds, refolds=refolds, consts=f consts}) |
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in |
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fun intro_add_global (thy, thm) = (map_intros (Drule.add_rule thm) thy, thm); |
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fun intro_del_global (thy, thm) = (map_intros (Drule.del_rule thm) thy, thm); |
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fun unfold_add_global (thy, thm) = (map_unfolds (Drule.add_rule thm) thy, thm); |
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fun unfold_del_global (thy, thm) = (map_unfolds (Drule.del_rule thm) thy, thm); |
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fun refold_add_global (thy, thm) = (map_refolds (Drule.add_rule thm) thy, thm); |
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fun refold_del_global (thy, thm) = (map_refolds (Drule.del_rule thm) thy, thm); |
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end |
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local |
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val undef_local = |
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Attrib.add_del_args |
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Attrib.undef_local_attribute |
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Attrib.undef_local_attribute; |
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in |
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val intro_attr = |
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(Attrib.add_del_args intro_add_global intro_del_global, undef_local); |
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val unfold_attr = |
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(Attrib.add_del_args unfold_add_global unfold_del_global, undef_local); |
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val refold_attr = |
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(Attrib.add_del_args refold_add_global refold_del_global, undef_local); |
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end |
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val transfer_method = Method.SIMPLE_METHOD' HEADGOAL o transfer_tac; |
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val setup = |
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17332
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
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[ TransferData.init, |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
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Attrib.add_attributes |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
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[ ("transfer_intro", intro_attr, |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
133 |
"declaration of transfer introduction rule"), |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
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("transfer_unfold", unfold_attr, |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
135 |
"declaration of transfer unfolding rule"), |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
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("transfer_refold", refold_attr, |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
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"declaration of transfer refolding rule") |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
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], |
4910cf8c0cd2
added theorem attributes transfer_intro, transfer_unfold, transfer_refold; simplified some proofs; some rearranging
huffman
parents:
17329
diff
changeset
|
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Method.add_method |
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("transfer", Method.thms_args transfer_method, "transfer principle") |
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]; |
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end; |