author | wenzelm |
Thu, 14 Jul 2005 19:28:24 +0200 | |
changeset 16842 | 5979c46853d1 |
parent 16512 | 1fa048f2a590 |
child 17314 | 04e21a27c0ad |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/context_rules.ML |
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ID: $Id$ |
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Author: Stefan Berghofer and Markus Wenzel, TU Muenchen |
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Declarations of intro/elim/dest rules in Pure; see |
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Provers/classical.ML for a more specialized version of the same idea. |
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*) |
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signature CONTEXT_RULES = |
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sig |
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type netpair |
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type T |
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val netpair_bang: ProofContext.context -> netpair |
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val netpair: ProofContext.context -> netpair |
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val orderlist: ((int * int) * 'a) list -> 'a list |
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val find_rules_netpair: bool -> thm list -> term -> netpair -> thm list |
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val find_rules: bool -> thm list -> term -> ProofContext.context -> thm list list |
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val print_global_rules: theory -> unit |
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val print_local_rules: ProofContext.context -> unit |
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val addSWrapper: ((int -> tactic) -> int -> tactic) -> theory -> theory |
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val addWrapper: ((int -> tactic) -> int -> tactic) -> theory -> theory |
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val Swrap: ProofContext.context -> (int -> tactic) -> int -> tactic |
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val wrap: ProofContext.context -> (int -> tactic) -> int -> tactic |
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val intro_bang_global: int option -> theory attribute |
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val elim_bang_global: int option -> theory attribute |
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val dest_bang_global: int option -> theory attribute |
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val intro_global: int option -> theory attribute |
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val elim_global: int option -> theory attribute |
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val dest_global: int option -> theory attribute |
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val intro_query_global: int option -> theory attribute |
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val elim_query_global: int option -> theory attribute |
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val dest_query_global: int option -> theory attribute |
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val rule_del_global: theory attribute |
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val intro_bang_local: int option -> ProofContext.context attribute |
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val elim_bang_local: int option -> ProofContext.context attribute |
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val dest_bang_local: int option -> ProofContext.context attribute |
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val intro_local: int option -> ProofContext.context attribute |
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val elim_local: int option -> ProofContext.context attribute |
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val dest_local: int option -> ProofContext.context attribute |
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val intro_query_local: int option -> ProofContext.context attribute |
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val elim_query_local: int option -> ProofContext.context attribute |
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val dest_query_local: int option -> ProofContext.context attribute |
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val rule_del_local: ProofContext.context attribute |
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val addXIs_global: theory * thm list -> theory |
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val addXEs_global: theory * thm list -> theory |
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val addXDs_global: theory * thm list -> theory |
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val delrules_global: theory * thm list -> theory |
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val addXIs_local: ProofContext.context * thm list -> ProofContext.context |
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val addXEs_local: ProofContext.context * thm list -> ProofContext.context |
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val addXDs_local: ProofContext.context * thm list -> ProofContext.context |
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val delrules_local: ProofContext.context * thm list -> ProofContext.context |
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end; |
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structure ContextRules: CONTEXT_RULES = |
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struct |
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(** rule declaration contexts **) |
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(* rule kinds *) |
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val intro_bangK = (0, false); |
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val elim_bangK = (0, true); |
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val introK = (1, false); |
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val elimK = (1, true); |
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val intro_queryK = (2, false); |
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val elim_queryK = (2, true); |
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val kind_names = |
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[(intro_bangK, "safe introduction rules (intro!)"), |
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(elim_bangK, "safe elimination rules (elim!)"), |
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(introK, "introduction rules (intro)"), |
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(elimK, "elimination rules (elim)"), |
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(intro_queryK, "extra introduction rules (intro?)"), |
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(elim_queryK, "extra elimination rules (elim?)")]; |
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val rule_kinds = map #1 kind_names; |
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val rule_indexes = distinct (map #1 rule_kinds); |
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(* raw data *) |
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type netpair = ((int * int) * (bool * thm)) Net.net * ((int * int) * (bool * thm)) Net.net; |
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val empty_netpairs: netpair list = replicate (length rule_indexes) (Net.empty, Net.empty); |
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datatype T = Rules of |
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{next: int, |
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rules: (int * ((int * bool) * thm)) list, |
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netpairs: netpair list, |
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wrappers: (((int -> tactic) -> int -> tactic) * stamp) list * |
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(((int -> tactic) -> int -> tactic) * stamp) list}; |
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fun make_rules next rules netpairs wrappers = |
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Rules {next = next, rules = rules, netpairs = netpairs, wrappers = wrappers}; |
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fun add_rule (i, b) opt_w th (Rules {next, rules, netpairs, wrappers}) = |
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let val w = (case opt_w of SOME w => w | NONE => Tactic.subgoals_of_brl (b, th)) in |
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make_rules (next - 1) ((w, ((i, b), th)) :: rules) |
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(map_nth_elem i (curry insert_tagged_brl ((w, next), (b, th))) netpairs) wrappers |
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end; |
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fun del_rule th (rs as Rules {next, rules, netpairs, wrappers}) = |
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let |
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fun eq_th (_, (_, th')) = Drule.eq_thm_prop (th, th'); |
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fun del b netpair = delete_tagged_brl ((b, th), netpair) handle Net.DELETE => netpair; |
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in |
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if not (exists eq_th rules) then rs |
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else make_rules next (filter_out eq_th rules) (map (del false o del true) netpairs) wrappers |
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end; |
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fun print_rules prt x (Rules {rules, ...}) = |
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let |
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fun prt_kind (i, b) = |
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Pretty.big_list (the (assoc (kind_names, (i, b))) ^ ":") |
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(List.mapPartial (fn (_, (k, th)) => if k = (i, b) then SOME (prt x th) else NONE) |
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(sort (int_ord o pairself fst) rules)); |
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in Pretty.writeln (Pretty.chunks (map prt_kind rule_kinds)) end; |
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(* theory and proof data *) |
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structure GlobalRulesArgs = |
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struct |
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val name = "Isar/rule_context"; |
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type T = T; |
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val empty = make_rules ~1 [] empty_netpairs ([], []); |
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val copy = I; |
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val extend = I; |
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fun merge _ (Rules {rules = rules1, wrappers = (ws1, ws1'), ...}, |
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Rules {rules = rules2, wrappers = (ws2, ws2'), ...}) = |
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let |
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val wrappers = (gen_merge_lists' eq_snd ws1 ws2, gen_merge_lists' eq_snd ws1' ws2'); |
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val rules = gen_merge_lists' (fn ((_, (k1, th1)), (_, (k2, th2))) => |
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k1 = k2 andalso Drule.eq_thm_prop (th1, th2)) rules1 rules2; |
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val next = ~ (length rules); |
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val netpairs = Library.foldl (fn (nps, (n, (w, ((i, b), th)))) => |
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map_nth_elem i (curry insert_tagged_brl ((w, n), (b, th))) nps) |
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(empty_netpairs, next upto ~1 ~~ rules); |
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in make_rules (next - 1) rules netpairs wrappers end; |
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val print = print_rules Display.pretty_thm_sg; |
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end; |
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structure GlobalRules = TheoryDataFun(GlobalRulesArgs); |
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val _ = Context.add_setup [GlobalRules.init]; |
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val print_global_rules = GlobalRules.print; |
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structure LocalRules = ProofDataFun |
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(struct |
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val name = GlobalRulesArgs.name; |
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type T = GlobalRulesArgs.T; |
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val init = GlobalRules.get; |
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val print = print_rules ProofContext.pretty_thm; |
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end); |
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val _ = Context.add_setup [LocalRules.init]; |
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val print_local_rules = LocalRules.print; |
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(* access data *) |
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fun netpairs ctxt = let val Rules {netpairs, ...} = LocalRules.get ctxt in netpairs end; |
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val netpair_bang = hd o netpairs; |
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val netpair = hd o tl o netpairs; |
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(* retrieving rules *) |
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fun untaglist [] = [] |
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| untaglist [(k : int * int, x)] = [x] |
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| untaglist ((k, x) :: (rest as (k', x') :: _)) = |
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if k = k' then untaglist rest |
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else x :: untaglist rest; |
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fun orderlist brls = |
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untaglist (sort (prod_ord int_ord int_ord o pairself fst) brls); |
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fun orderlist_no_weight brls = |
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untaglist (sort (int_ord o pairself (snd o fst)) brls); |
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fun may_unify weighted t net = |
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map snd ((if weighted then orderlist else orderlist_no_weight) (Net.unify_term net t)); |
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fun find_erules _ [] = K [] |
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| find_erules w (fact :: _) = may_unify w (Logic.strip_assums_concl (Thm.prop_of fact)); |
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fun find_irules w goal = may_unify w (Logic.strip_assums_concl goal); |
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fun find_rules_netpair weighted facts goal (inet, enet) = |
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find_erules weighted facts enet @ find_irules weighted goal inet; |
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fun find_rules weighted facts goals = |
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map (find_rules_netpair weighted facts goals) o netpairs; |
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(* wrappers *) |
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fun gen_add_wrapper upd w = GlobalRules.map (fn (rs as Rules {next, rules, netpairs, wrappers}) => |
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make_rules next rules netpairs (upd (fn ws => (w, stamp ()) :: ws) wrappers)); |
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val addSWrapper = gen_add_wrapper Library.apfst; |
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val addWrapper = gen_add_wrapper Library.apsnd; |
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fun gen_wrap which ctxt = |
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let val Rules {wrappers, ...} = LocalRules.get ctxt |
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in fn tac => foldr (fn ((w, _), t) => w t) tac (which wrappers) end; |
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val Swrap = gen_wrap #1; |
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val wrap = gen_wrap #2; |
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(** attributes **) |
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(* add and del rules *) |
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local |
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fun del map_data (x, th) = |
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(map_data (del_rule th o del_rule (Tactic.make_elim th)) x, th); |
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fun add k view map_data opt_w = |
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(fn (x, th) => (map_data (add_rule k opt_w (view th)) x, th)) o del map_data; |
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in |
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val intro_bang_global = add intro_bangK I GlobalRules.map; |
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val elim_bang_global = add elim_bangK I GlobalRules.map; |
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val dest_bang_global = add elim_bangK Tactic.make_elim GlobalRules.map; |
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val intro_global = add introK I GlobalRules.map; |
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val elim_global = add elimK I GlobalRules.map; |
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val dest_global = add elimK Tactic.make_elim GlobalRules.map; |
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val intro_query_global = add intro_queryK I GlobalRules.map; |
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val elim_query_global = add elim_queryK I GlobalRules.map; |
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val dest_query_global = add elim_queryK Tactic.make_elim GlobalRules.map; |
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val rule_del_global = del GlobalRules.map; |
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val intro_bang_local = add intro_bangK I LocalRules.map; |
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val elim_bang_local = add elim_bangK I LocalRules.map; |
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val dest_bang_local = add elim_bangK Tactic.make_elim LocalRules.map; |
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val intro_local = add introK I LocalRules.map; |
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val elim_local = add elimK I LocalRules.map; |
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val dest_local = add elimK Tactic.make_elim LocalRules.map; |
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val intro_query_local = add intro_queryK I LocalRules.map; |
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val elim_query_local = add elim_queryK I LocalRules.map; |
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val dest_query_local = add elim_queryK Tactic.make_elim LocalRules.map; |
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val rule_del_local = del LocalRules.map; |
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end; |
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val _ = Context.add_setup |
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[#1 o PureThy.add_thms [(("", Drule.equal_intr_rule), [intro_query_global NONE])]]; |
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(* low-level modifiers *) |
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fun modifier att (x, ths) = |
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#1 (Thm.applys_attributes ((x, rev ths), [att])); |
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val addXIs_global = modifier (intro_query_global NONE); |
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val addXEs_global = modifier (elim_query_global NONE); |
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val addXDs_global = modifier (dest_query_global NONE); |
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val delrules_global = modifier rule_del_global; |
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val addXIs_local = modifier (intro_query_local NONE); |
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val addXEs_local = modifier (elim_query_local NONE); |
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val addXDs_local = modifier (dest_query_local NONE); |
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val delrules_local = modifier rule_del_local; |
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end; |