src/Provers/classical.ML
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(*  Title:      Provers/classical.ML
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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Theorem prover for classical reasoning, including predicate calculus, set
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theory, etc.
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Rules must be classified as intro, elim, safe, hazardous (unsafe).
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A rule is unsafe unless it can be applied blindly without harmful results.
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For a rule to be safe, its premises and conclusion should be logically
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equivalent.  There should be no variables in the premises that are not in
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the conclusion.
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*)
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(*higher precedence than := facilitates use of references*)
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infix 4 addSIs addSEs addSDs addIs addEs addDs delrules
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  addSWrapper delSWrapper addWrapper delWrapper
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  addSbefore addSafter addbefore addafter
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  addD2 addE2 addSD2 addSE2;
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(*should be a type abbreviation in signature CLASSICAL*)
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type netpair = (int * (bool * thm)) Net.net * (int * (bool * thm)) Net.net;
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type wrapper = (int -> tactic) -> (int -> tactic);
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signature CLASSICAL_DATA =
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sig
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  val imp_elim: thm  (* P --> Q ==> (~ R ==> P) ==> (Q ==> R) ==> R *)
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  val not_elim: thm  (* ~P ==> P ==> R *)
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  val swap: thm  (* ~ P ==> (~ R ==> P) ==> R *)
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  val classical: thm  (* (~ P ==> P) ==> P *)
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  val sizef: thm -> int  (* size function for BEST_FIRST *)
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  val hyp_subst_tacs: (int -> tactic) list
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end;
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signature BASIC_CLASSICAL =
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sig
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  type claset
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  val empty_cs: claset
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  val print_cs: Proof.context -> claset -> unit
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  val rep_cs: claset ->
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   {safeIs: thm list,
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    safeEs: thm list,
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    hazIs: thm list,
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    hazEs: thm list,
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    swrappers: (string * wrapper) list,
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    uwrappers: (string * wrapper) list,
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    safe0_netpair: netpair,
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    safep_netpair: netpair,
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    haz_netpair: netpair,
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    dup_netpair: netpair,
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    xtra_netpair: Context_Rules.netpair}
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  val merge_cs: claset * claset -> claset
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  val addDs: claset * thm list -> claset
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  val addEs: claset * thm list -> claset
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  val addIs: claset * thm list -> claset
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  val addSDs: claset * thm list -> claset
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  val addSEs: claset * thm list -> claset
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  val addSIs: claset * thm list -> claset
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  val delrules: claset * thm list -> claset
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  val addSWrapper: claset * (string * wrapper) -> claset
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  val delSWrapper: claset *  string -> claset
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  val addWrapper: claset * (string * wrapper) -> claset
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  val delWrapper: claset *  string -> claset
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  val addSbefore: claset * (string * (int -> tactic)) -> claset
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  val addSafter: claset * (string * (int -> tactic)) -> claset
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  val addbefore: claset * (string * (int -> tactic)) -> claset
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  val addafter: claset * (string * (int -> tactic)) -> claset
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  val addD2: claset * (string * thm) -> claset
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  val addE2: claset * (string * thm) -> claset
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  val addSD2: claset * (string * thm) -> claset
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  val addSE2: claset * (string * thm) -> claset
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  val appSWrappers: claset -> wrapper
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  val appWrappers: claset -> wrapper
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  val global_claset_of: theory -> claset
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  val claset_of: Proof.context -> claset
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  val fast_tac: claset -> int -> tactic
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  val slow_tac: claset -> int -> tactic
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  val astar_tac: claset -> int -> tactic
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  val slow_astar_tac: claset -> int -> tactic
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  val best_tac: claset -> int -> tactic
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  val first_best_tac: claset -> int -> tactic
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  val slow_best_tac: claset -> int -> tactic
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  val depth_tac: claset -> int -> int -> tactic
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  val deepen_tac: claset -> int -> int -> tactic
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  val contr_tac: int -> tactic
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  val dup_elim: thm -> thm
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  val dup_intr: thm -> thm
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  val dup_step_tac: claset -> int -> tactic
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  val eq_mp_tac: int -> tactic
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  val haz_step_tac: claset -> int -> tactic
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  val joinrules: thm list * thm list -> (bool * thm) list
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  val mp_tac: int -> tactic
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  val safe_tac: claset -> tactic
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  val safe_steps_tac: claset -> int -> tactic
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  val safe_step_tac: claset -> int -> tactic
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  val clarify_tac: claset -> int -> tactic
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  val clarify_step_tac: claset -> int -> tactic
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  val step_tac: claset -> int -> tactic
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  val slow_step_tac: claset -> int -> tactic
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  val swapify: thm list -> thm list
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  val swap_res_tac: thm list -> int -> tactic
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  val inst_step_tac: claset -> int -> tactic
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  val inst0_step_tac: claset -> int -> tactic
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  val instp_step_tac: claset -> int -> tactic
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end;
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signature CLASSICAL =
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sig
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  include BASIC_CLASSICAL
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  val classical_rule: thm -> thm
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  val add_context_safe_wrapper: string * (Proof.context -> wrapper) -> theory -> theory
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  val del_context_safe_wrapper: string -> theory -> theory
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  val add_context_unsafe_wrapper: string * (Proof.context -> wrapper) -> theory -> theory
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  val del_context_unsafe_wrapper: string -> theory -> theory
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  val get_claset: Proof.context -> claset
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  val put_claset: claset -> Proof.context -> Proof.context
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  val get_cs: Context.generic -> claset
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  val map_cs: (claset -> claset) -> Context.generic -> Context.generic
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  val safe_dest: int option -> attribute
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  val safe_elim: int option -> attribute
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  val safe_intro: int option -> attribute
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  val haz_dest: int option -> attribute
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  val haz_elim: int option -> attribute
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  val haz_intro: int option -> attribute
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  val rule_del: attribute
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  val cla_modifiers: Method.modifier parser list
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  val cla_meth: (claset -> tactic) -> Proof.context -> Proof.method
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  val cla_meth': (claset -> int -> tactic) -> Proof.context -> Proof.method
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  val cla_method: (claset -> tactic) -> (Proof.context -> Proof.method) context_parser
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  val cla_method': (claset -> int -> tactic) -> (Proof.context -> Proof.method) context_parser
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  val setup: theory -> theory
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end;
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functor ClassicalFun(Data: CLASSICAL_DATA): CLASSICAL =
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struct
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(** classical elimination rules **)
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(*
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Classical reasoning requires stronger elimination rules.  For
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instance, make_elim of Pure transforms the HOL rule injD into
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    [| inj f; f x = f y; x = y ==> PROP W |] ==> PROP W
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Such rules can cause fast_tac to fail and blast_tac to report "PROOF
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FAILED"; classical_rule will strenthen this to
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    [| inj f; ~ W ==> f x = f y; x = y ==> W |] ==> W
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*)
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fun classical_rule rule =
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  if is_some (Object_Logic.elim_concl rule) then
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    let
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      val rule' = rule RS Data.classical;
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      val concl' = Thm.concl_of rule';
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      fun redundant_hyp goal =
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        concl' aconv Logic.strip_assums_concl goal orelse
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          (case Logic.strip_assums_hyp goal of
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            hyp :: hyps => exists (fn t => t aconv hyp) hyps
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          | _ => false);
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      val rule'' =
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        rule' |> ALLGOALS (SUBGOAL (fn (goal, i) =>
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          if i = 1 orelse redundant_hyp goal
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          then Tactic.etac thin_rl i
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          else all_tac))
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        |> Seq.hd
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        |> Drule.zero_var_indexes;
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    in if Thm.equiv_thm (rule, rule'') then rule else rule'' end
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  else rule;
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(*flatten nested meta connectives in prems*)
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val flat_rule = Conv.fconv_rule (Conv.prems_conv ~1 Object_Logic.atomize_prems);
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(*** Useful tactics for classical reasoning ***)
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(*Prove goal that assumes both P and ~P.
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  No backtracking if it finds an equal assumption.  Perhaps should call
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  ematch_tac instead of eresolve_tac, but then cannot prove ZF/cantor.*)
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val contr_tac =
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  eresolve_tac [Data.not_elim] THEN' (eq_assume_tac ORELSE' assume_tac);
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(*Finds P-->Q and P in the assumptions, replaces implication by Q.
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  Could do the same thing for P<->Q and P... *)
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fun mp_tac i = eresolve_tac [Data.not_elim, Data.imp_elim] i THEN assume_tac i;
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(*Like mp_tac but instantiates no variables*)
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fun eq_mp_tac i = ematch_tac [Data.not_elim, Data.imp_elim] i THEN eq_assume_tac i;
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(*Creates rules to eliminate ~A, from rules to introduce A*)
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fun swapify intrs = intrs RLN (2, [Data.swap]);
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val swapped = Thm.rule_attribute (fn _ => fn th => th RSN (2, Data.swap));
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(*Uses introduction rules in the normal way, or on negated assumptions,
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  trying rules in order. *)
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fun swap_res_tac rls =
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  let fun addrl rl brls = (false, rl) :: (true, rl RSN (2, Data.swap)) :: brls in
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    assume_tac ORELSE'
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    contr_tac ORELSE'
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    biresolve_tac (fold_rev addrl rls [])
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  end;
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(*Duplication of hazardous rules, for complete provers*)
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fun dup_intr th = zero_var_indexes (th RS Data.classical);
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fun dup_elim th =
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  let
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    val rl = (th RSN (2, revcut_rl)) |> Thm.assumption 2 |> Seq.hd;
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    val ctxt = Proof_Context.init_global (Thm.theory_of_thm rl);
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  in rule_by_tactic ctxt (TRYALL (etac revcut_rl)) rl end;
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(**** Classical rule sets ****)
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datatype claset =
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  CS of {safeIs         : thm list,                (*safe introduction rules*)
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         safeEs         : thm list,                (*safe elimination rules*)
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         hazIs          : thm list,                (*unsafe introduction rules*)
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         hazEs          : thm list,                (*unsafe elimination rules*)
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         swrappers      : (string * wrapper) list, (*for transforming safe_step_tac*)
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         uwrappers      : (string * wrapper) list, (*for transforming step_tac*)
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         safe0_netpair  : netpair,                 (*nets for trivial cases*)
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         safep_netpair  : netpair,                 (*nets for >0 subgoals*)
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         haz_netpair    : netpair,                 (*nets for unsafe rules*)
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         dup_netpair    : netpair,                 (*nets for duplication*)
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         xtra_netpair   : Context_Rules.netpair};  (*nets for extra rules*)
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(*Desired invariants are
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        safe0_netpair = build safe0_brls,
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        safep_netpair = build safep_brls,
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        haz_netpair = build (joinrules(hazIs, hazEs)),
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        dup_netpair = build (joinrules(map dup_intr hazIs,
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                                       map dup_elim hazEs))
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where build = build_netpair(Net.empty,Net.empty),
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      safe0_brls contains all brules that solve the subgoal, and
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      safep_brls contains all brules that generate 1 or more new subgoals.
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The theorem lists are largely comments, though they are used in merge_cs and print_cs.
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Nets must be built incrementally, to save space and time.
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*)
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val empty_netpair = (Net.empty, Net.empty);
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val empty_cs =
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  CS{safeIs     = [],
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     safeEs     = [],
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     hazIs      = [],
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     hazEs      = [],
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     swrappers  = [],
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     uwrappers  = [],
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     safe0_netpair = empty_netpair,
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     safep_netpair = empty_netpair,
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     haz_netpair   = empty_netpair,
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     dup_netpair   = empty_netpair,
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     xtra_netpair  = empty_netpair};
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fun print_cs ctxt (CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, ...}) =
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  let val pretty_thms = map (Display.pretty_thm ctxt) in
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    [Pretty.big_list "safe introduction rules (intro!):" (pretty_thms safeIs),
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      Pretty.big_list "introduction rules (intro):" (pretty_thms hazIs),
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      Pretty.big_list "safe elimination rules (elim!):" (pretty_thms safeEs),
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      Pretty.big_list "elimination rules (elim):" (pretty_thms hazEs),
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      Pretty.strs ("safe wrappers:" :: map #1 swrappers),
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      Pretty.strs ("unsafe wrappers:" :: map #1 uwrappers)]
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    |> Pretty.chunks |> Pretty.writeln
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  end;
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fun rep_cs (CS args) = args;
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fun appSWrappers (CS {swrappers, ...}) = fold snd swrappers;
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fun appWrappers  (CS {uwrappers, ...}) = fold snd uwrappers;
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(*** Adding (un)safe introduction or elimination rules.
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    In case of overlap, new rules are tried BEFORE old ones!!
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***)
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(*For use with biresolve_tac.  Combines intro rules with swap to handle negated
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  assumptions.  Pairs elim rules with true. *)
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fun joinrules (intrs, elims) =
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  (map (pair true) (elims @ swapify intrs)) @ map (pair false) intrs;
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fun joinrules' (intrs, elims) =
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  map (pair true) elims @ map (pair false) intrs;
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(*Priority: prefer rules with fewest subgoals,
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  then rules added most recently (preferring the head of the list).*)
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fun tag_brls k [] = []
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  | tag_brls k (brl::brls) =
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      (1000000*subgoals_of_brl brl + k, brl) ::
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      tag_brls (k+1) brls;
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fun tag_brls' _ _ [] = []
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  | tag_brls' w k (brl::brls) = ((w, k), brl) :: tag_brls' w (k + 1) brls;
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fun insert_tagged_list rls = fold_rev Tactic.insert_tagged_brl rls;
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(*Insert into netpair that already has nI intr rules and nE elim rules.
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  Count the intr rules double (to account for swapify).  Negate to give the
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  new insertions the lowest priority.*)
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   307
fun insert (nI, nE) = insert_tagged_list o (tag_brls (~(2*nI+nE))) o joinrules;
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   308
fun insert' w (nI, nE) = insert_tagged_list o tag_brls' w (~(nI + nE)) o joinrules';
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   309
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22846
diff changeset
   310
fun delete_tagged_list rls = fold_rev Tactic.delete_tagged_brl rls;
12362
57cd572103c4 made SML/NJ happy;
wenzelm
parents: 12311
diff changeset
   311
fun delete x = delete_tagged_list (joinrules x);
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   312
fun delete' x = delete_tagged_list (joinrules' x);
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   313
22360
26ead7ed4f4b moved eq_thm etc. to structure Thm in Pure/more_thm.ML;
wenzelm
parents: 22095
diff changeset
   314
val mem_thm = member Thm.eq_thm_prop
26ead7ed4f4b moved eq_thm etc. to structure Thm in Pure/more_thm.ML;
wenzelm
parents: 22095
diff changeset
   315
and rem_thm = remove Thm.eq_thm_prop;
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   316
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   317
fun warn msg rules th =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   318
  mem_thm rules th andalso (warning (msg ^ Display.string_of_thm_without_context th); true);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   319
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   320
fun warn_other th (CS{safeIs, safeEs, hazIs, hazEs, ...}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   321
  warn "Rule already declared as safe introduction (intro!)\n" safeIs th orelse
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   322
  warn "Rule already declared as safe elimination (elim!)\n" safeEs th orelse
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   323
  warn "Rule already declared as introduction (intro)\n" hazIs th orelse
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   324
  warn "Rule already declared as elimination (elim)\n" hazEs th;
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   325
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   326
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   327
(*** Safe rules ***)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   328
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   329
fun addSI w th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   330
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   331
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   332
  if warn "Ignoring duplicate safe introduction (intro!)\n" safeIs th then cs
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   333
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   334
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   335
      val th' = flat_rule th;
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
diff changeset
   336
      val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   337
        List.partition Thm.no_prems [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   338
      val nI = length safeIs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   339
      val nE = length safeEs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   340
      val _ = warn_other th cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   341
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   342
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   343
       {safeIs  = th::safeIs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   344
        safe0_netpair = insert (nI,nE) (safe0_rls, []) safe0_netpair,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   345
        safep_netpair = insert (nI,nE) (safep_rls, []) safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   346
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   347
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   348
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   349
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   350
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   351
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   352
        dup_netpair = dup_netpair,
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   353
        xtra_netpair = insert' (the_default 0 w) (nI,nE) ([th], []) xtra_netpair}
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   354
    end;
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   355
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   356
fun addSE w th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   357
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   358
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   359
  if warn "Ignoring duplicate safe elimination (elim!)\n" safeEs th then cs
18557
60a0f9caa0a2 Provers/classical: stricter checks to ensure that supplied intro, dest and
paulson
parents: 18534
diff changeset
   360
  else if has_fewer_prems 1 th then
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   361
    error ("Ill-formed elimination rule\n" ^ Display.string_of_thm_without_context th)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   362
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   363
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   364
      val th' = classical_rule (flat_rule th);
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   365
      val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   366
        List.partition (fn rl => nprems_of rl=1) [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   367
      val nI = length safeIs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   368
      val nE = length safeEs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   369
      val _ = warn_other th cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   370
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   371
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   372
       {safeEs  = th::safeEs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   373
        safe0_netpair = insert (nI,nE) ([], safe0_rls) safe0_netpair,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   374
        safep_netpair = insert (nI,nE) ([], safep_rls) safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   375
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   376
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   377
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   378
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   379
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   380
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   381
        dup_netpair = dup_netpair,
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   382
        xtra_netpair = insert' (the_default 0 w) (nI,nE) ([], [th]) xtra_netpair}
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   383
    end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   384
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   385
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   386
(*** Hazardous (unsafe) rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   387
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   388
fun addI w th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   389
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   390
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   391
  if warn "Ignoring duplicate introduction (intro)\n" hazIs th then cs
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   392
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   393
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   394
      val th' = flat_rule th;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   395
      val nI = length hazIs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   396
      val nE = length hazEs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   397
      val _ = warn_other th cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   398
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   399
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   400
       {hazIs = th :: hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   401
        haz_netpair = insert (nI, nE) ([th'], []) haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   402
        dup_netpair = insert (nI, nE) ([dup_intr th'], []) dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   403
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   404
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   405
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   406
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   407
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   408
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   409
        safep_netpair = safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   410
        xtra_netpair = insert' (the_default 1 w) (nI, nE) ([th], []) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   411
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   412
    handle THM ("RSN: no unifiers", _, _) => (*from dup_intr*)  (* FIXME !? *)
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   413
      error ("Ill-formed introduction rule\n" ^ Display.string_of_thm_without_context th);
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   414
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   415
fun addE w th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   416
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   417
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   418
  if warn "Ignoring duplicate elimination (elim)\n" hazEs th then cs
18557
60a0f9caa0a2 Provers/classical: stricter checks to ensure that supplied intro, dest and
paulson
parents: 18534
diff changeset
   419
  else if has_fewer_prems 1 th then
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   420
    error ("Ill-formed elimination rule\n" ^ Display.string_of_thm_without_context th)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   421
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   422
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   423
      val th' = classical_rule (flat_rule th);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   424
      val nI = length hazIs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   425
      val nE = length hazEs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   426
      val _ = warn_other th cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   427
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   428
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   429
       {hazEs = th :: hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   430
        haz_netpair = insert (nI, nE) ([], [th']) haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   431
        dup_netpair = insert (nI, nE) ([], [dup_elim th']) dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   432
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   433
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   434
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   435
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   436
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   437
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   438
        safep_netpair = safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   439
        xtra_netpair = insert' (the_default 1 w) (nI, nE) ([], [th]) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   440
    end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   441
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   442
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   443
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   444
(*** Deletion of rules
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   445
     Working out what to delete, requires repeating much of the code used
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   446
        to insert.
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   447
***)
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   448
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   449
fun delSI th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   450
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   451
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   452
  if mem_thm safeIs th then
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   453
    let
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   454
      val th' = flat_rule th;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   455
      val (safe0_rls, safep_rls) = List.partition Thm.no_prems [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   456
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   457
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   458
       {safe0_netpair = delete (safe0_rls, []) safe0_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   459
        safep_netpair = delete (safep_rls, []) safep_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   460
        safeIs = rem_thm th safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   461
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   462
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   463
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   464
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   465
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   466
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   467
        dup_netpair = dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   468
        xtra_netpair = delete' ([th], []) xtra_netpair}
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   469
    end
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   470
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   471
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   472
fun delSE th
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   473
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   474
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   475
  if mem_thm safeEs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   476
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   477
      val th' = classical_rule (flat_rule th);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   478
      val (safe0_rls, safep_rls) = List.partition (fn rl => nprems_of rl = 1) [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   479
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   480
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   481
       {safe0_netpair = delete ([], safe0_rls) safe0_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   482
        safep_netpair = delete ([], safep_rls) safep_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   483
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   484
        safeEs = rem_thm th safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   485
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   486
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   487
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   488
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   489
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   490
        dup_netpair = dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   491
        xtra_netpair = delete' ([], [th]) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   492
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   493
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   494
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   495
fun delI th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   496
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   497
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   498
  if mem_thm hazIs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   499
    let val th' = flat_rule th in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   500
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   501
       {haz_netpair = delete ([th'], []) haz_netpair,
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
diff changeset
   502
        dup_netpair = delete ([dup_intr th'], []) dup_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   503
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   504
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   505
        hazIs = rem_thm th hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   506
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   507
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   508
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   509
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   510
        safep_netpair = safep_netpair,
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   511
        xtra_netpair = delete' ([th], []) xtra_netpair}
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
diff changeset
   512
    end
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   513
  else cs
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   514
  handle THM ("RSN: no unifiers", _, _) => (*from dup_intr*)  (* FIXME !? *)
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   515
    error ("Ill-formed introduction rule\n" ^ Display.string_of_thm_without_context th);
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   516
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   517
fun delE th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   518
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   519
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   520
  if mem_thm hazEs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   521
    let val th' = classical_rule (flat_rule th) in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   522
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   523
       {haz_netpair = delete ([], [th']) haz_netpair,
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   524
        dup_netpair = delete ([], [dup_elim th']) dup_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   525
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   526
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   527
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   528
        hazEs = rem_thm th hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   529
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   530
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   531
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   532
        safep_netpair = safep_netpair,
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   533
        xtra_netpair = delete' ([], [th]) xtra_netpair}
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   534
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   535
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   536
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   537
(*Delete ALL occurrences of "th" in the claset (perhaps from several lists)*)
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   538
fun delrule th (cs as CS {safeIs, safeEs, hazIs, hazEs, ...}) =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   539
  let val th' = Tactic.make_elim th (* FIXME classical make_elim!? *) in
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   540
    if mem_thm safeIs th orelse mem_thm safeEs th orelse
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   541
      mem_thm hazIs th orelse mem_thm hazEs th orelse
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   542
      mem_thm safeEs th' orelse mem_thm hazEs th'
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   543
    then delSI th (delSE th (delI th (delE th (delSE th' (delE th' cs)))))
32091
30e2ffbba718 proper context for Display.pretty_thm etc. or old-style versions Display.pretty_thm_global, Display.pretty_thm_without_context etc.;
wenzelm
parents: 31945
diff changeset
   544
    else (warning ("Undeclared classical rule\n" ^ Display.string_of_thm_without_context th); cs)
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   545
  end;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   546
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   547
fun cs delrules ths = fold delrule ths cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   548
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   549
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   550
fun make_elim th =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   551
  if has_fewer_prems 1 th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   552
    error ("Ill-formed destruction rule\n" ^ Display.string_of_thm_without_context th)
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   553
  else Tactic.make_elim th;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   554
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   555
fun cs addSIs ths = fold_rev (addSI NONE) ths cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   556
fun cs addSEs ths = fold_rev (addSE NONE) ths cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   557
fun cs addSDs ths = cs addSEs (map make_elim ths);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   558
fun cs addIs ths = fold_rev (addI NONE) ths cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   559
fun cs addEs ths = fold_rev (addE NONE) ths cs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   560
fun cs addDs ths = cs addEs (map make_elim ths);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   561
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   562
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   563
(*** Modifying the wrapper tacticals ***)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   564
fun map_swrappers f
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   565
  (CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   566
    safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   567
  CS {safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs,
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   568
    swrappers = f swrappers, uwrappers = uwrappers,
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   569
    safe0_netpair = safe0_netpair, safep_netpair = safep_netpair,
6955
9e2d97ef55d2 type claset: added extra I/E rules;
wenzelm
parents: 6556
diff changeset
   570
    haz_netpair = haz_netpair, dup_netpair = dup_netpair, xtra_netpair = xtra_netpair};
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   571
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   572
fun map_uwrappers f
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   573
  (CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   574
    safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   575
  CS {safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs,
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   576
    swrappers = swrappers, uwrappers = f uwrappers,
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   577
    safe0_netpair = safe0_netpair, safep_netpair = safep_netpair,
6955
9e2d97ef55d2 type claset: added extra I/E rules;
wenzelm
parents: 6556
diff changeset
   578
    haz_netpair = haz_netpair, dup_netpair = dup_netpair, xtra_netpair = xtra_netpair};
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   579
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   580
fun update_warn msg (p as (key : string, _)) xs =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   581
  (if AList.defined (op =) xs key then warning msg else (); AList.update (op =) p xs);
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   582
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   583
fun delete_warn msg (key : string) xs =
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   584
  if AList.defined (op =) xs key then AList.delete (op =) key xs
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   585
  else (warning msg; xs);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   586
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   587
(*Add/replace a safe wrapper*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   588
fun cs addSWrapper new_swrapper = map_swrappers
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   589
  (update_warn ("Overwriting safe wrapper " ^ fst new_swrapper) new_swrapper) cs;
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   590
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   591
(*Add/replace an unsafe wrapper*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   592
fun cs addWrapper new_uwrapper = map_uwrappers
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   593
  (update_warn ("Overwriting unsafe wrapper " ^ fst new_uwrapper) new_uwrapper) cs;
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   594
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   595
(*Remove a safe wrapper*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   596
fun cs delSWrapper name = map_swrappers
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   597
  (delete_warn ("No such safe wrapper in claset: " ^ name) name) cs;
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   598
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   599
(*Remove an unsafe wrapper*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   600
fun cs delWrapper name = map_uwrappers
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   601
  (delete_warn ("No such unsafe wrapper in claset: " ^ name) name) cs;
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   602
11168
b964accc9307 corrected comments on addbefore and addSbefore
oheimb
parents: 10821
diff changeset
   603
(* compose a safe tactic alternatively before/after safe_step_tac *)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   604
fun cs addSbefore (name, tac1) = cs addSWrapper (name, fn tac2 => tac1 ORELSE' tac2);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   605
fun cs addSafter (name, tac2) = cs addSWrapper (name, fn tac1 => tac1 ORELSE' tac2);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   606
11168
b964accc9307 corrected comments on addbefore and addSbefore
oheimb
parents: 10821
diff changeset
   607
(*compose a tactic alternatively before/after the step tactic *)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   608
fun cs addbefore (name, tac1) = cs addWrapper (name, fn tac2 => tac1 APPEND' tac2);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   609
fun cs addafter (name, tac2) = cs addWrapper (name, fn tac1 => tac1 APPEND' tac2);
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   610
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   611
fun cs addD2 (name, thm) = cs addafter (name, datac thm 1);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   612
fun cs addE2 (name, thm) = cs addafter (name, eatac thm 1);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   613
fun cs addSD2 (name, thm) = cs addSafter (name, dmatch_tac [thm] THEN' eq_assume_tac);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   614
fun cs addSE2 (name, thm) = cs addSafter (name, ematch_tac [thm] THEN' eq_assume_tac);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   615
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   616
(*Merge works by adding all new rules of the 2nd claset into the 1st claset.
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   617
  Merging the term nets may look more efficient, but the rather delicate
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   618
  treatment of priority might get muddled up.*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   619
fun merge_cs (cs as CS {safeIs, safeEs, hazIs, hazEs, ...},
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   620
    cs' as CS {safeIs = safeIs2, safeEs = safeEs2, hazIs = hazIs2, hazEs = hazEs2,
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   621
      swrappers, uwrappers, ...}) =
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   622
  if pointer_eq (cs, cs') then cs
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   623
  else
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   624
    let
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   625
      val safeIs' = fold rem_thm safeIs safeIs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   626
      val safeEs' = fold rem_thm safeEs safeEs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   627
      val hazIs' = fold rem_thm hazIs hazIs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   628
      val hazEs' = fold rem_thm hazEs hazEs2;
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   629
      val cs1 = cs addSIs safeIs' addSEs safeEs' addIs hazIs' addEs hazEs';
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   630
      val cs2 = map_swrappers (fn ws => AList.merge (op =) (K true) (ws, swrappers)) cs1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   631
      val cs3 = map_uwrappers (fn ws => AList.merge (op =) (K true) (ws, uwrappers)) cs2;
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   632
    in cs3 end;
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   633
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   634
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   635
(**** Simple tactics for theorem proving ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   636
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   637
(*Attack subgoals using safe inferences -- matching, not resolution*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   638
fun safe_step_tac (cs as CS {safe0_netpair, safep_netpair, ...}) =
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   639
  appSWrappers cs (FIRST' [
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   640
        eq_assume_tac,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   641
        eq_mp_tac,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   642
        bimatch_from_nets_tac safe0_netpair,
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   643
        FIRST' Data.hyp_subst_tacs,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   644
        bimatch_from_nets_tac safep_netpair]);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   645
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   646
(*Repeatedly attack a subgoal using safe inferences -- it's deterministic!*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   647
fun safe_steps_tac cs =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   648
  REPEAT_DETERM1 o (fn i => COND (has_fewer_prems i) no_tac (safe_step_tac cs i));
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   649
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   650
(*Repeatedly attack subgoals using safe inferences -- it's deterministic!*)
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   651
fun safe_tac cs = REPEAT_DETERM1 (FIRSTGOAL (safe_steps_tac cs));
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   652
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   653
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   654
(*** Clarify_tac: do safe steps without causing branching ***)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   655
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   656
fun nsubgoalsP n (k, brl) = (subgoals_of_brl brl = n);
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   657
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   658
(*version of bimatch_from_nets_tac that only applies rules that
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   659
  create precisely n subgoals.*)
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   660
fun n_bimatch_from_nets_tac n =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   661
  biresolution_from_nets_tac (order_list o filter (nsubgoalsP n)) true;
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   662
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   663
fun eq_contr_tac i = ematch_tac [Data.not_elim] i THEN eq_assume_tac i;
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   664
val eq_assume_contr_tac = eq_assume_tac ORELSE' eq_contr_tac;
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   665
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   666
(*Two-way branching is allowed only if one of the branches immediately closes*)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   667
fun bimatch2_tac netpair i =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   668
  n_bimatch_from_nets_tac 2 netpair i THEN
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   669
  (eq_assume_contr_tac i ORELSE eq_assume_contr_tac (i + 1));
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   670
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   671
(*Attack subgoals using safe inferences -- matching, not resolution*)
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   672
fun clarify_step_tac (cs as CS{safe0_netpair,safep_netpair,...}) =
4651
70dd492a1698 changed wrapper mechanism of classical reasoner
oheimb
parents: 4646
diff changeset
   673
  appSWrappers cs (FIRST' [
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   674
        eq_assume_contr_tac,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   675
        bimatch_from_nets_tac safe0_netpair,
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   676
        FIRST' Data.hyp_subst_tacs,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   677
        n_bimatch_from_nets_tac 1 safep_netpair,
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   678
        bimatch2_tac safep_netpair]);
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   679
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   680
fun clarify_tac cs = SELECT_GOAL (REPEAT_DETERM (clarify_step_tac cs 1));
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   681
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   682
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   683
(*** Unsafe steps instantiate variables or lose information ***)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   684
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   685
(*Backtracking is allowed among the various these unsafe ways of
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   686
  proving a subgoal.  *)
32862
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   687
fun inst0_step_tac (CS {safe0_netpair, ...}) =
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   688
  assume_tac APPEND'
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   689
  contr_tac APPEND'
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   690
  biresolve_from_nets_tac safe0_netpair;
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   691
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   692
(*These unsafe steps could generate more subgoals.*)
32862
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   693
fun instp_step_tac (CS {safep_netpair, ...}) =
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   694
  biresolve_from_nets_tac safep_netpair;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   695
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   696
(*These steps could instantiate variables and are therefore unsafe.*)
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   697
fun inst_step_tac cs = inst0_step_tac cs APPEND' instp_step_tac cs;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   698
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   699
fun haz_step_tac (CS{haz_netpair,...}) =
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   700
  biresolve_from_nets_tac haz_netpair;
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   701
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   702
(*Single step for the prover.  FAILS unless it makes progress. *)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   703
fun step_tac cs i =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   704
  safe_tac cs ORELSE appWrappers cs (inst_step_tac cs ORELSE' haz_step_tac cs) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   705
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   706
(*Using a "safe" rule to instantiate variables is unsafe.  This tactic
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   707
  allows backtracking from "safe" rules to "unsafe" rules here.*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   708
fun slow_step_tac cs i =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   709
  safe_tac cs ORELSE appWrappers cs (inst_step_tac cs APPEND' haz_step_tac cs) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   710
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   711
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   712
(**** The following tactics all fail unless they solve one goal ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   713
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   714
(*Dumb but fast*)
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   715
fun fast_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   716
  Object_Logic.atomize_prems_tac THEN' SELECT_GOAL (DEPTH_SOLVE (step_tac cs 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   717
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   718
(*Slower but smarter than fast_tac*)
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   719
fun best_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   720
  Object_Logic.atomize_prems_tac THEN'
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   721
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (step_tac cs 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   722
9402
480a1b40fdd6 strengthened force_tac by using new first_best_tac
oheimb
parents: 9184
diff changeset
   723
(*even a bit smarter than best_tac*)
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   724
fun first_best_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   725
  Object_Logic.atomize_prems_tac THEN'
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   726
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (FIRSTGOAL (step_tac cs)));
9402
480a1b40fdd6 strengthened force_tac by using new first_best_tac
oheimb
parents: 9184
diff changeset
   727
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   728
fun slow_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   729
  Object_Logic.atomize_prems_tac THEN'
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   730
  SELECT_GOAL (DEPTH_SOLVE (slow_step_tac cs 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   731
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   732
fun slow_best_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   733
  Object_Logic.atomize_prems_tac THEN'
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   734
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (slow_step_tac cs 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   735
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   736
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   737
(***ASTAR with weight weight_ASTAR, by Norbert Voelker*)
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   738
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   739
val weight_ASTAR = 5;
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   740
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   741
fun astar_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   742
  Object_Logic.atomize_prems_tac THEN'
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   743
  SELECT_GOAL
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   744
    (ASTAR (has_fewer_prems 1, fn lev => fn thm => size_of_thm thm + weight_ASTAR * lev)
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   745
      (step_tac cs 1));
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   746
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   747
fun slow_astar_tac cs =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   748
  Object_Logic.atomize_prems_tac THEN'
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   749
  SELECT_GOAL
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   750
    (ASTAR (has_fewer_prems 1, fn lev => fn thm => size_of_thm thm + weight_ASTAR * lev)
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   751
      (slow_step_tac cs 1));
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   752
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   753
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   754
(**** Complete tactic, loosely based upon LeanTaP.  This tactic is the outcome
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   755
  of much experimentation!  Changing APPEND to ORELSE below would prove
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   756
  easy theorems faster, but loses completeness -- and many of the harder
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   757
  theorems such as 43. ****)
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   758
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   759
(*Non-deterministic!  Could always expand the first unsafe connective.
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   760
  That's hard to implement and did not perform better in experiments, due to
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   761
  greater search depth required.*)
32863
5e8cef567042 eliminated dead code;
wenzelm
parents: 32862
diff changeset
   762
fun dup_step_tac (CS {dup_netpair, ...}) =
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   763
  biresolve_from_nets_tac dup_netpair;
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   764
5523
dc8cdc192cd0 added addD2, addE2, addSD2, and addSE2
oheimb
parents: 5028
diff changeset
   765
(*Searching to depth m. A variant called nodup_depth_tac appears in clasimp.ML*)
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   766
local
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   767
  fun slow_step_tac' cs = appWrappers cs (instp_step_tac cs APPEND' dup_step_tac cs);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   768
in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   769
  fun depth_tac cs m i state = SELECT_GOAL
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   770
    (safe_steps_tac cs 1 THEN_ELSE
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   771
      (DEPTH_SOLVE (depth_tac cs m 1),
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   772
        inst0_step_tac cs 1 APPEND COND (K (m = 0)) no_tac
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   773
          (slow_step_tac' cs 1 THEN DEPTH_SOLVE (depth_tac cs (m - 1) 1)))) i state;
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   774
end;
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   775
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   776
(*Search, with depth bound m.
2173
08c68550460b Added a comment
paulson
parents: 2066
diff changeset
   777
  This is the "entry point", which does safe inferences first.*)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   778
fun safe_depth_tac cs m = SUBGOAL (fn (prem,i) =>
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   779
  let val deti =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   780
      (*No Vars in the goal?  No need to backtrack between goals.*)
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   781
    if exists_subterm (fn Var _ => true | _ => false) prem then DETERM else I
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   782
  in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   783
    SELECT_GOAL (TRY (safe_tac cs) THEN DEPTH_SOLVE (deti (depth_tac cs m 1))) i
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   784
  end);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   785
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   786
fun deepen_tac cs = DEEPEN (2, 10) (safe_depth_tac cs);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   787
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   788
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   789
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   790
(** context dependent claset components **)
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   791
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   792
datatype context_cs = ContextCS of
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   793
 {swrappers: (string * (Proof.context -> wrapper)) list,
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   794
  uwrappers: (string * (Proof.context -> wrapper)) list};
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   795
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   796
fun context_cs ctxt cs (ContextCS {swrappers, uwrappers}) =
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   797
  let
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   798
    fun add_wrapper add (name, f) claset = add (claset, (name, f ctxt));
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   799
  in
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   800
    cs
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   801
    |> fold_rev (add_wrapper (op addSWrapper)) swrappers
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   802
    |> fold_rev (add_wrapper (op addWrapper)) uwrappers
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   803
  end;
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   804
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   805
fun make_context_cs (swrappers, uwrappers) =
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   806
  ContextCS {swrappers = swrappers, uwrappers = uwrappers};
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   807
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   808
val empty_context_cs = make_context_cs ([], []);
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   809
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   810
fun merge_context_cs (ctxt_cs1, ctxt_cs2) =
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   811
  if pointer_eq (ctxt_cs1, ctxt_cs2) then ctxt_cs1
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   812
  else
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   813
    let
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   814
      val ContextCS {swrappers = swrappers1, uwrappers = uwrappers1} = ctxt_cs1;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   815
      val ContextCS {swrappers = swrappers2, uwrappers = uwrappers2} = ctxt_cs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   816
      val swrappers' = AList.merge (op =) (K true) (swrappers1, swrappers2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   817
      val uwrappers' = AList.merge (op =) (K true) (uwrappers1, uwrappers2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   818
    in make_context_cs (swrappers', uwrappers') end;
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   819
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   820
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   821
17880
4494c023bf2a change_claset(_of): more abtract interface;
wenzelm
parents: 17795
diff changeset
   822
(** claset data **)
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   823
24021
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   824
(* global clasets *)
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   825
33522
737589bb9bb8 adapted Theory_Data;
wenzelm
parents: 33519
diff changeset
   826
structure GlobalClaset = Theory_Data
22846
fb79144af9a3 simplified DataFun interfaces;
wenzelm
parents: 22674
diff changeset
   827
(
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   828
  type T = claset * context_cs;
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   829
  val empty = (empty_cs, empty_context_cs);
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   830
  val extend = I;
33522
737589bb9bb8 adapted Theory_Data;
wenzelm
parents: 33519
diff changeset
   831
  fun merge ((cs1, ctxt_cs1), (cs2, ctxt_cs2)) =
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   832
    (merge_cs (cs1, cs2), merge_context_cs (ctxt_cs1, ctxt_cs2));
22846
fb79144af9a3 simplified DataFun interfaces;
wenzelm
parents: 22674
diff changeset
   833
);
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   834
32261
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   835
val get_global_claset = #1 o GlobalClaset.get;
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   836
val map_global_claset = GlobalClaset.map o apfst;
17880
4494c023bf2a change_claset(_of): more abtract interface;
wenzelm
parents: 17795
diff changeset
   837
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 41581
diff changeset
   838
val get_context_cs = #2 o GlobalClaset.get o Proof_Context.theory_of;
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   839
fun map_context_cs f = GlobalClaset.map (apsnd
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   840
  (fn ContextCS {swrappers, uwrappers} => make_context_cs (f (swrappers, uwrappers))));
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   841
32148
253f6808dabe renamed simpset_of to global_simpset_of, and local_simpset_of to simpset_of -- same for claset and clasimpset;
wenzelm
parents: 32091
diff changeset
   842
fun global_claset_of thy =
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   843
  let val (cs, ctxt_cs) = GlobalClaset.get thy
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 41581
diff changeset
   844
  in context_cs (Proof_Context.init_global thy) cs (ctxt_cs) end;
3727
ed63c05d7992 Added Safe_tac; all other default claset tactics now dereference "claset"
paulson
parents: 3705
diff changeset
   845
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   846
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   847
(* context dependent components *)
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   848
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   849
fun add_context_safe_wrapper wrapper = map_context_cs (apfst ((AList.update (op =) wrapper)));
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   850
fun del_context_safe_wrapper name = map_context_cs (apfst ((AList.delete (op =) name)));
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   851
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   852
fun add_context_unsafe_wrapper wrapper = map_context_cs (apsnd ((AList.update (op =) wrapper)));
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   853
fun del_context_unsafe_wrapper name = map_context_cs (apsnd ((AList.delete (op =) name)));
15036
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   854
cab1c1fc1851 context dependent components;
wenzelm
parents: 14605
diff changeset
   855
24021
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   856
(* local clasets *)
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   857
33519
e31a85f92ce9 adapted Generic_Data, Proof_Data;
wenzelm
parents: 33369
diff changeset
   858
structure LocalClaset = Proof_Data
22846
fb79144af9a3 simplified DataFun interfaces;
wenzelm
parents: 22674
diff changeset
   859
(
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   860
  type T = claset;
32261
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   861
  val init = get_global_claset;
22846
fb79144af9a3 simplified DataFun interfaces;
wenzelm
parents: 22674
diff changeset
   862
);
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   863
32261
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   864
val get_claset = LocalClaset.get;
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   865
val put_claset = LocalClaset.put;
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   866
32148
253f6808dabe renamed simpset_of to global_simpset_of, and local_simpset_of to simpset_of -- same for claset and clasimpset;
wenzelm
parents: 32091
diff changeset
   867
fun claset_of ctxt =
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   868
  context_cs ctxt (LocalClaset.get ctxt) (get_context_cs ctxt);
22846
fb79144af9a3 simplified DataFun interfaces;
wenzelm
parents: 22674
diff changeset
   869
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   870
24021
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   871
(* generic clasets *)
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   872
32148
253f6808dabe renamed simpset_of to global_simpset_of, and local_simpset_of to simpset_of -- same for claset and clasimpset;
wenzelm
parents: 32091
diff changeset
   873
val get_cs = Context.cases global_claset_of claset_of;
32261
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   874
fun map_cs f = Context.mapping (map_global_claset f) (LocalClaset.map f);
24021
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   875
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   876
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   877
(* attributes *)
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   878
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   879
fun attrib f = Thm.declaration_attribute (fn th =>
32261
05e687ddbcee removed old global get_claset/map_claset;
wenzelm
parents: 32148
diff changeset
   880
  Context.mapping (map_global_claset (f th)) (LocalClaset.map (f th)));
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   881
21689
58abd6d8abd1 Removal of theorem tagging, which the ATP linkup no longer requires,
paulson
parents: 21687
diff changeset
   882
fun safe_dest w = attrib (addSE w o make_elim);
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   883
val safe_elim = attrib o addSE;
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   884
val safe_intro = attrib o addSI;
21689
58abd6d8abd1 Removal of theorem tagging, which the ATP linkup no longer requires,
paulson
parents: 21687
diff changeset
   885
fun haz_dest w = attrib (addE w o make_elim);
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   886
val haz_elim = attrib o addE;
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   887
val haz_intro = attrib o addI;
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   888
val rule_del = attrib delrule o Context_Rules.rule_del;
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   889
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   890
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   891
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   892
(** concrete syntax of attributes **)
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   893
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   894
val introN = "intro";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   895
val elimN = "elim";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   896
val destN = "dest";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   897
30528
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   898
val setup_attrs =
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   899
  Attrib.setup @{binding swapped} (Scan.succeed swapped)
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   900
    "classical swap of introduction rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   901
  Attrib.setup @{binding dest} (Context_Rules.add safe_dest haz_dest Context_Rules.dest_query)
30528
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   902
    "declaration of Classical destruction rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   903
  Attrib.setup @{binding elim} (Context_Rules.add safe_elim haz_elim Context_Rules.elim_query)
30528
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   904
    "declaration of Classical elimination rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   905
  Attrib.setup @{binding intro} (Context_Rules.add safe_intro haz_intro Context_Rules.intro_query)
30528
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   906
    "declaration of Classical introduction rule" #>
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   907
  Attrib.setup @{binding rule} (Scan.lift Args.del >> K rule_del)
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   908
    "remove declaration of intro/elim/dest rule";
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   909
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   910
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   911
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   912
(** proof methods **)
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   913
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   914
local
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   915
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   916
fun some_rule_tac ctxt facts = SUBGOAL (fn (goal, i) =>
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   917
  let
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   918
    val [rules1, rules2, rules4] = Context_Rules.find_rules false facts goal ctxt;
32148
253f6808dabe renamed simpset_of to global_simpset_of, and local_simpset_of to simpset_of -- same for claset and clasimpset;
wenzelm
parents: 32091
diff changeset
   919
    val CS {xtra_netpair, ...} = claset_of ctxt;
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   920
    val rules3 = Context_Rules.find_rules_netpair true facts goal xtra_netpair;
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   921
    val rules = rules1 @ rules2 @ rules3 @ rules4;
18223
20830cb4428c Drule.multi_resolves;
wenzelm
parents: 18015
diff changeset
   922
    val ruleq = Drule.multi_resolves facts rules;
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   923
  in
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   924
    Method.trace ctxt rules;
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32863
diff changeset
   925
    fn st => Seq.maps (fn rule => Tactic.rtac rule i st) ruleq
18834
7e94af77cfce default rule step: norm_hhf_tac;
wenzelm
parents: 18728
diff changeset
   926
  end)
21687
f689f729afab reorganized structure Goal vs. Tactic;
wenzelm
parents: 21646
diff changeset
   927
  THEN_ALL_NEW Goal.norm_hhf_tac;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   928
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   929
in
7281
2f454e1fd372 renamed 'some_rule' to 'rule';
wenzelm
parents: 7272
diff changeset
   930
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   931
fun rule_tac ctxt [] facts = some_rule_tac ctxt facts
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   932
  | rule_tac _ rules facts = Method.rule_tac rules facts;
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   933
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   934
fun default_tac ctxt rules facts =
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   935
  HEADGOAL (rule_tac ctxt rules facts) ORELSE
26470
e44d24620515 unfold_locales now part of default tactic
haftmann
parents: 26425
diff changeset
   936
  Class.default_intro_tac ctxt facts;
10309
a7f961fb62c6 intro_classes by default;
wenzelm
parents: 10185
diff changeset
   937
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   938
end;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   939
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   940
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   941
(* contradiction method *)
6502
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   942
7425
2089c70f2c6d Method.insert_tac;
wenzelm
parents: 7354
diff changeset
   943
val contradiction = Method.rule [Data.not_elim, Data.not_elim COMP Drule.swap_prems_rl];
6502
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   944
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   945
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   946
(* automatic methods *)
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   947
5927
991483daa1a4 expoer cla_method('), cla_modifiers;
wenzelm
parents: 5885
diff changeset
   948
val cla_modifiers =
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   949
 [Args.$$$ destN -- Args.bang_colon >> K ((I, safe_dest NONE): Method.modifier),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   950
  Args.$$$ destN -- Args.colon >> K (I, haz_dest NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   951
  Args.$$$ elimN -- Args.bang_colon >> K (I, safe_elim NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   952
  Args.$$$ elimN -- Args.colon >> K (I, haz_elim NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   953
  Args.$$$ introN -- Args.bang_colon >> K (I, safe_intro NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   954
  Args.$$$ introN -- Args.colon >> K (I, haz_intro NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   955
  Args.del -- Args.colon >> K (I, rule_del)];
5927
991483daa1a4 expoer cla_method('), cla_modifiers;
wenzelm
parents: 5885
diff changeset
   956
35613
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   957
fun cla_meth tac ctxt = METHOD (fn facts =>
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   958
  ALLGOALS (Method.insert_tac facts) THEN tac (claset_of ctxt));
7132
5c31d06ead04 eliminated METHOD0 in favour of same_tac;
wenzelm
parents: 7106
diff changeset
   959
35613
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   960
fun cla_meth' tac ctxt = METHOD (fn facts =>
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   961
  HEADGOAL (Method.insert_tac facts THEN' tac (claset_of ctxt)));
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   962
35613
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   963
fun cla_method tac = Method.sections cla_modifiers >> K (cla_meth tac);
9d3ff36ad4e1 eliminated Args.bang_facts (legacy feature);
wenzelm
parents: 33522
diff changeset
   964
fun cla_method' tac = Method.sections cla_modifiers >> K (cla_meth' tac);
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   965
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   966
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   967
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   968
(** setup_methods **)
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   969
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   970
val setup_methods =
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   971
  Method.setup @{binding default}
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   972
   (Attrib.thms >> (fn rules => fn ctxt => METHOD (default_tac ctxt rules)))
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   973
    "apply some intro/elim rule (potentially classical)" #>
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   974
  Method.setup @{binding rule}
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   975
    (Attrib.thms >> (fn rules => fn ctxt => METHOD (HEADGOAL o rule_tac ctxt rules)))
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   976
    "apply some intro/elim rule (potentially classical)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   977
  Method.setup @{binding contradiction} (Scan.succeed (K contradiction))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   978
    "proof by contradiction" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   979
  Method.setup @{binding clarify} (cla_method' (CHANGED_PROP oo clarify_tac))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   980
    "repeatedly apply safe steps" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   981
  Method.setup @{binding fast} (cla_method' fast_tac) "classical prover (depth-first)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   982
  Method.setup @{binding slow} (cla_method' slow_tac) "classical prover (slow depth-first)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   983
  Method.setup @{binding best} (cla_method' best_tac) "classical prover (best-first)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   984
  Method.setup @{binding deepen} (cla_method' (fn cs => deepen_tac cs 4))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   985
    "classical prover (iterative deepening)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   986
  Method.setup @{binding safe} (cla_method (CHANGED_PROP o safe_tac))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   987
    "classical prover (apply safe rules)";
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   988
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   989
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   990
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   991
(** theory setup **)
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   992
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   993
val setup = setup_attrs #> setup_methods;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   994
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   995
8667
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   996
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   997
(** outer syntax **)
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   998
24867
e5b55d7be9bb simplified interfaces for outer syntax;
wenzelm
parents: 24358
diff changeset
   999
val _ =
36960
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
  1000
  Outer_Syntax.improper_command "print_claset" "print context of Classical Reasoner"
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
  1001
    Keyword.diag
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
  1002
    (Scan.succeed (Toplevel.no_timing o Toplevel.unknown_context o
42439
9efdd0af15ac eliminated Display.string_of_thm_without_context;
wenzelm
parents: 42361
diff changeset
  1003
      Toplevel.keep (fn state =>
9efdd0af15ac eliminated Display.string_of_thm_without_context;
wenzelm
parents: 42361
diff changeset
  1004
        let val ctxt = Toplevel.context_of state
9efdd0af15ac eliminated Display.string_of_thm_without_context;
wenzelm
parents: 42361
diff changeset
  1005
        in print_cs ctxt (claset_of ctxt) end)));
8667
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
  1006
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
  1007
end;