src/Provers/classical.ML
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proper Proof.context for classical tactics; reduced claset to snapshot of classical context; discontinued clasimpset;
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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 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 * (Proof.context -> wrapper)) list,
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    uwrappers: (string * (Proof.context -> 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 print_claset: Proof.context -> unit
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  val addDs: Proof.context * thm list -> Proof.context
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  val addEs: Proof.context * thm list -> Proof.context
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  val addIs: Proof.context * thm list -> Proof.context
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  val addSDs: Proof.context * thm list -> Proof.context
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  val addSEs: Proof.context * thm list -> Proof.context
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  val addSIs: Proof.context * thm list -> Proof.context
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  val delrules: Proof.context * thm list -> Proof.context
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  val addSWrapper: claset * (string * (Proof.context -> wrapper)) -> claset
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  val delSWrapper: claset *  string -> claset
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  val addWrapper: claset * (string * (Proof.context -> 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: Proof.context -> wrapper
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  val appWrappers: Proof.context -> 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 map_claset: (claset -> claset) -> Proof.context -> Proof.context
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  val put_claset: claset -> Proof.context -> Proof.context
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  val fast_tac: Proof.context -> int -> tactic
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  val slow_tac: Proof.context -> int -> tactic
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  val astar_tac: Proof.context -> int -> tactic
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  val slow_astar_tac: Proof.context -> int -> tactic
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  val best_tac: Proof.context -> int -> tactic
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  val first_best_tac: Proof.context -> int -> tactic
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  val slow_best_tac: Proof.context -> int -> tactic
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  val depth_tac: Proof.context -> int -> int -> tactic
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  val deepen_tac: Proof.context -> 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: Proof.context -> int -> tactic
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  val eq_mp_tac: int -> tactic
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  val haz_step_tac: Proof.context -> 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: Proof.context -> tactic
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  val safe_steps_tac: Proof.context -> int -> tactic
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  val safe_step_tac: Proof.context -> int -> tactic
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  val clarify_tac: Proof.context -> int -> tactic
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  val clarify_step_tac: Proof.context -> int -> tactic
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  val step_tac: Proof.context -> int -> tactic
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  val slow_step_tac: Proof.context -> 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: Proof.context -> int -> tactic
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  val inst0_step_tac: Proof.context -> int -> tactic
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  val instp_step_tac: Proof.context -> 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 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_method:
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    (Proof.context -> tactic) -> (Proof.context -> Proof.method) context_parser
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  val cla_method':
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    (Proof.context -> 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 =  (* FIXME proper context!? *)
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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
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   {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 * (Proof.context -> wrapper)) list, (*for transforming safe_step_tac*)
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    uwrappers      : (string * (Proof.context -> 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
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   {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 rep_cs (CS args) = args;
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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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fun insert (nI, nE) = insert_tagged_list o (tag_brls (~(2*nI+nE))) o joinrules;
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fun insert' w (nI, nE) = insert_tagged_list o tag_brls' w (~(nI + nE)) o joinrules';
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fun delete_tagged_list rls = fold_rev Tactic.delete_tagged_brl rls;
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fun delete x = delete_tagged_list (joinrules x);
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fun delete' x = delete_tagged_list (joinrules' x);
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val mem_thm = member Thm.eq_thm_prop
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and rem_thm = remove Thm.eq_thm_prop;
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fun string_of_thm NONE = Display.string_of_thm_without_context
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  | string_of_thm (SOME context) =
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      Display.string_of_thm (Context.cases Syntax.init_pretty_global I context);
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fun make_elim context th =
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  if has_fewer_prems 1 th then
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    error ("Ill-formed destruction rule\n" ^ string_of_thm context th)
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  else Tactic.make_elim th;
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42793
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fun warn context msg rules th =
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  mem_thm rules th andalso (warning (msg ^ string_of_thm context th); true);
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parents: 42792
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88bee9f6eec7 proper Proof.context for classical tactics;
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fun warn_other context th (CS{safeIs, safeEs, hazIs, hazEs, ...}) =
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  warn context "Rule already declared as safe introduction (intro!)\n" safeIs th orelse
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wenzelm
parents: 42792
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  warn context "Rule already declared as safe elimination (elim!)\n" safeEs th orelse
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wenzelm
parents: 42792
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  warn context "Rule already declared as introduction (intro)\n" hazIs th orelse
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wenzelm
parents: 42792
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   316
  warn context "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
   317
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   318
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
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   319
(*** Safe rules ***)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   320
42793
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wenzelm
parents: 42792
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   321
fun addSI w context th
42790
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wenzelm
parents: 42439
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   322
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
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   323
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
42793
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wenzelm
parents: 42792
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   324
  if warn context "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
   325
  else
42790
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wenzelm
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   326
    let
e07e56300faa misc tuning and simplification;
wenzelm
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   327
      val th' = flat_rule th;
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
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   328
      val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
42790
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wenzelm
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   329
        List.partition Thm.no_prems [th'];
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wenzelm
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   330
      val nI = length safeIs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
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   331
      val nE = length safeEs;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
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   332
      val _ = warn_other context th cs;
42790
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wenzelm
parents: 42439
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   333
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   334
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
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   335
       {safeIs  = th::safeIs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   336
        safe0_netpair = insert (nI,nE) (safe0_rls, []) safe0_netpair,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
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   337
        safep_netpair = insert (nI,nE) (safep_rls, []) safep_netpair,
42790
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wenzelm
parents: 42439
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   338
        safeEs = safeEs,
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wenzelm
parents: 42439
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   339
        hazIs = hazIs,
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wenzelm
parents: 42439
diff changeset
   340
        hazEs = hazEs,
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wenzelm
parents: 42439
diff changeset
   341
        swrappers = swrappers,
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wenzelm
parents: 42439
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   342
        uwrappers = uwrappers,
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wenzelm
parents: 42439
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   343
        haz_netpair = haz_netpair,
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wenzelm
parents: 42439
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   344
        dup_netpair = dup_netpair,
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
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        xtra_netpair = insert' (the_default 0 w) (nI,nE) ([th], []) xtra_netpair}
42790
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wenzelm
parents: 42439
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   346
    end;
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
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   347
42793
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wenzelm
parents: 42792
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   348
fun addSE w context th
42790
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wenzelm
parents: 42439
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   349
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
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   350
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
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   351
  if warn context "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
   352
  else if has_fewer_prems 1 th then
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   353
    error ("Ill-formed elimination rule\n" ^ string_of_thm context th)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   354
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   355
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   356
      val th' = classical_rule (flat_rule th);
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   357
      val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
42790
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wenzelm
parents: 42439
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   358
        List.partition (fn rl => nprems_of rl=1) [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   359
      val nI = length safeIs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   360
      val nE = length safeEs + 1;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   361
      val _ = warn_other context th cs;
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   362
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   363
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   364
       {safeEs  = th::safeEs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   365
        safe0_netpair = insert (nI,nE) ([], safe0_rls) safe0_netpair,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   366
        safep_netpair = insert (nI,nE) ([], safep_rls) safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   367
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   368
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   369
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   370
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   371
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   372
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   373
        dup_netpair = dup_netpair,
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   374
        xtra_netpair = insert' (the_default 0 w) (nI,nE) ([], [th]) xtra_netpair}
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   375
    end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   376
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
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   377
fun addSD w context th = addSE w context (make_elim context th);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   378
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   379
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   380
(*** Hazardous (unsafe) rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   381
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   382
fun addI w context th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   383
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   384
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   385
  if warn context "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
   386
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   387
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   388
      val th' = flat_rule th;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   389
      val nI = length hazIs + 1;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   390
      val nE = length hazEs;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   391
      val _ = warn_other context th cs;
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   392
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   393
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   394
       {hazIs = th :: hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   395
        haz_netpair = insert (nI, nE) ([th'], []) haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   396
        dup_netpair = insert (nI, nE) ([dup_intr th'], []) dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   397
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   398
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   399
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   400
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   401
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   402
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   403
        safep_netpair = safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   404
        xtra_netpair = insert' (the_default 1 w) (nI, nE) ([th], []) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   405
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   406
    handle THM ("RSN: no unifiers", _, _) => (*from dup_intr*)  (* FIXME !? *)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   407
      error ("Ill-formed introduction rule\n" ^ string_of_thm context th);
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   408
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   409
fun addE w context th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   410
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   411
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   412
  if warn context "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
   413
  else if has_fewer_prems 1 th then
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   414
    error ("Ill-formed elimination rule\n" ^ string_of_thm context th)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   415
  else
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   416
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   417
      val th' = classical_rule (flat_rule th);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   418
      val nI = length hazIs;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   419
      val nE = length hazEs + 1;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   420
      val _ = warn_other context th cs;
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   421
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   422
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   423
       {hazEs = th :: hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   424
        haz_netpair = insert (nI, nE) ([], [th']) haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   425
        dup_netpair = insert (nI, nE) ([], [dup_elim th']) dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   426
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   427
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   428
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   429
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   430
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   431
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   432
        safep_netpair = safep_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   433
        xtra_netpair = insert' (the_default 1 w) (nI, nE) ([], [th]) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   434
    end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   435
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   436
fun addD w context th = addE w context (make_elim context th);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   437
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   438
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   439
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   440
(*** Deletion of rules
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   441
     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
   442
        to insert.
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   443
***)
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   444
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   445
fun delSI th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   446
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   447
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   448
  if mem_thm safeIs th then
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   449
    let
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   450
      val th' = flat_rule th;
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   451
      val (safe0_rls, safep_rls) = List.partition Thm.no_prems [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   452
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   453
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   454
       {safe0_netpair = delete (safe0_rls, []) safe0_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   455
        safep_netpair = delete (safep_rls, []) safep_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   456
        safeIs = rem_thm th safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   457
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   458
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   459
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   460
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   461
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   462
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   463
        dup_netpair = dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   464
        xtra_netpair = delete' ([th], []) xtra_netpair}
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   465
    end
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   466
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   467
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   468
fun delSE th
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   469
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   470
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   471
  if mem_thm safeEs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   472
    let
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   473
      val th' = classical_rule (flat_rule th);
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   474
      val (safe0_rls, safep_rls) = List.partition (fn rl => nprems_of rl = 1) [th'];
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   475
    in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   476
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   477
       {safe0_netpair = delete ([], safe0_rls) safe0_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   478
        safep_netpair = delete ([], safep_rls) safep_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   479
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   480
        safeEs = rem_thm th safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   481
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   482
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   483
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   484
        uwrappers = uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   485
        haz_netpair = haz_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   486
        dup_netpair = dup_netpair,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   487
        xtra_netpair = delete' ([], [th]) xtra_netpair}
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   488
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   489
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   490
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   491
fun delI context th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   492
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   493
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   494
  if mem_thm hazIs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   495
    let val th' = flat_rule th in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   496
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   497
       {haz_netpair = delete ([th'], []) haz_netpair,
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
diff changeset
   498
        dup_netpair = delete ([dup_intr th'], []) dup_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   499
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   500
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   501
        hazIs = rem_thm th hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   502
        hazEs = hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   503
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   504
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   505
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   506
        safep_netpair = safep_netpair,
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   507
        xtra_netpair = delete' ([th], []) xtra_netpair}
23594
e65e466dda01 renamed ObjectLogic.atomize_tac to ObjectLogic.atomize_prems_tac;
wenzelm
parents: 23178
diff changeset
   508
    end
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   509
  else cs
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   510
  handle THM ("RSN: no unifiers", _, _) => (*from dup_intr*)  (* FIXME !? *)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   511
    error ("Ill-formed introduction rule\n" ^ string_of_thm context th);
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   512
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   513
fun delE th
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   514
    (cs as CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   515
      safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   516
  if mem_thm hazEs th then
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   517
    let val th' = classical_rule (flat_rule th) in
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   518
      CS
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   519
       {haz_netpair = delete ([], [th']) haz_netpair,
18534
6799b38ed872 added classical_rule, which replaces Data.make_elim;
wenzelm
parents: 18374
diff changeset
   520
        dup_netpair = delete ([], [dup_elim th']) dup_netpair,
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   521
        safeIs = safeIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   522
        safeEs = safeEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   523
        hazIs = hazIs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   524
        hazEs = rem_thm th hazEs,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   525
        swrappers = swrappers,
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   526
        uwrappers = uwrappers,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   527
        safe0_netpair = safe0_netpair,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   528
        safep_netpair = safep_netpair,
12401
4363432ef0cd added 'swapped' attribute;
wenzelm
parents: 12376
diff changeset
   529
        xtra_netpair = delete' ([], [th]) xtra_netpair}
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   530
    end
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   531
  else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   532
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   533
(*Delete ALL occurrences of "th" in the claset (perhaps from several lists)*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   534
fun delrule context th (cs as CS {safeIs, safeEs, hazIs, hazEs, ...}) =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   535
  let val th' = Tactic.make_elim th in
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   536
    if mem_thm safeIs th orelse mem_thm safeEs th orelse
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   537
      mem_thm hazIs th orelse mem_thm hazEs th orelse
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   538
      mem_thm safeEs th' orelse mem_thm hazEs th'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   539
    then delSI th (delSE th (delI context th (delE th (delSE th' (delE th' cs)))))
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   540
    else (warning ("Undeclared classical rule\n" ^ string_of_thm context th); cs)
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   541
  end;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   542
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   543
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   544
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   545
(** claset data **)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   546
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   547
(* wrappers *)
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   548
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   549
fun map_swrappers f
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   550
  (CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   551
    safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   552
  CS {safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs,
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   553
    swrappers = f swrappers, uwrappers = uwrappers,
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   554
    safe0_netpair = safe0_netpair, safep_netpair = safep_netpair,
6955
9e2d97ef55d2 type claset: added extra I/E rules;
wenzelm
parents: 6556
diff changeset
   555
    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
   556
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   557
fun map_uwrappers f
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   558
  (CS {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers,
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   559
    safe0_netpair, safep_netpair, haz_netpair, dup_netpair, xtra_netpair}) =
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   560
  CS {safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs,
4767
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   561
    swrappers = swrappers, uwrappers = f uwrappers,
b9f3468c6ee2 introduced functions for updating the wrapper lists
oheimb
parents: 4765
diff changeset
   562
    safe0_netpair = safe0_netpair, safep_netpair = safep_netpair,
6955
9e2d97ef55d2 type claset: added extra I/E rules;
wenzelm
parents: 6556
diff changeset
   563
    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
   564
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   565
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   566
(* merge_cs *)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   567
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   568
(*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
   569
  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
   570
  treatment of priority might get muddled up.*)
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   571
fun merge_cs (cs as CS {safeIs, safeEs, hazIs, hazEs, ...},
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   572
    cs' as CS {safeIs = safeIs2, safeEs = safeEs2, hazIs = hazIs2, hazEs = hazEs2,
22674
1a610904bbca canonical merge operations
haftmann
parents: 22474
diff changeset
   573
      swrappers, uwrappers, ...}) =
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   574
  if pointer_eq (cs, cs') then cs
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   575
  else
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   576
    let
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   577
      val safeIs' = fold rem_thm safeIs safeIs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   578
      val safeEs' = fold rem_thm safeEs safeEs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   579
      val hazIs' = fold rem_thm hazIs hazIs2;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24218
diff changeset
   580
      val hazEs' = fold rem_thm hazEs hazEs2;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   581
    in
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   582
      cs
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   583
      |> fold_rev (addSI NONE NONE) safeIs'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   584
      |> fold_rev (addSE NONE NONE) safeEs'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   585
      |> fold_rev (addI NONE NONE) hazIs'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   586
      |> fold_rev (addE NONE NONE) hazEs'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   587
      |> map_swrappers (fn ws => AList.merge (op =) (K true) (ws, swrappers))
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   588
      |> map_uwrappers (fn ws => AList.merge (op =) (K true) (ws, uwrappers))
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   589
    end;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   590
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   591
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   592
(* data *)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   593
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   594
structure Claset = Generic_Data
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   595
(
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   596
  type T = claset;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   597
  val empty = empty_cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   598
  val extend = I;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   599
  val merge = merge_cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   600
);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   601
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   602
val global_claset_of = Claset.get o Context.Theory;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   603
val claset_of = Claset.get o Context.Proof;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   604
val rep_claset_of = rep_cs o claset_of;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   605
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   606
val get_cs = Claset.get;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   607
val map_cs = Claset.map;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   608
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   609
fun map_claset f = Context.proof_map (map_cs f);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   610
fun put_claset cs = map_claset (K cs);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   611
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   612
fun print_claset ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   613
  let
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   614
    val {safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, ...} = rep_claset_of ctxt;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   615
    val pretty_thms = map (Display.pretty_thm ctxt);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   616
  in
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   617
    [Pretty.big_list "safe introduction rules (intro!):" (pretty_thms safeIs),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   618
      Pretty.big_list "introduction rules (intro):" (pretty_thms hazIs),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   619
      Pretty.big_list "safe elimination rules (elim!):" (pretty_thms safeEs),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   620
      Pretty.big_list "elimination rules (elim):" (pretty_thms hazEs),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   621
      Pretty.strs ("safe wrappers:" :: map #1 swrappers),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   622
      Pretty.strs ("unsafe wrappers:" :: map #1 uwrappers)]
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   623
    |> Pretty.chunks |> Pretty.writeln
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   624
  end;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   625
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   626
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   627
(* old-style declarations *)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   628
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   629
fun decl f (ctxt, ths) = map_claset (fold_rev (f (SOME (Context.Proof ctxt))) ths) ctxt;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   630
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   631
val op addSIs = decl (addSI NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   632
val op addSEs = decl (addSE NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   633
val op addSDs = decl (addSD NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   634
val op addIs = decl (addI NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   635
val op addEs = decl (addE NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   636
val op addDs = decl (addD NONE);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   637
val op delrules = decl delrule;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   638
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   639
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   640
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   641
(*** Modifying the wrapper tacticals ***)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   642
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   643
fun appSWrappers ctxt = fold (fn (_, w) => w ctxt) (#swrappers (rep_claset_of ctxt));
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   644
fun appWrappers ctxt = fold (fn (_, w) => w ctxt) (#uwrappers (rep_claset_of ctxt));
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   645
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   646
fun update_warn msg (p as (key : string, _)) xs =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   647
  (if AList.defined (op =) xs key then warning msg else (); AList.update (op =) p xs);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   648
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   649
fun delete_warn msg (key : string) xs =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   650
  if AList.defined (op =) xs key then AList.delete (op =) key xs
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   651
  else (warning msg; xs);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   652
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   653
(*Add/replace a safe wrapper*)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   654
fun cs addSWrapper new_swrapper =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   655
  map_swrappers (update_warn ("Overwriting safe wrapper " ^ fst new_swrapper) new_swrapper) cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   656
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   657
(*Add/replace an unsafe wrapper*)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   658
fun cs addWrapper new_uwrapper =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   659
  map_uwrappers (update_warn ("Overwriting unsafe wrapper " ^ fst new_uwrapper) new_uwrapper) cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   660
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   661
(*Remove a safe wrapper*)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   662
fun cs delSWrapper name =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   663
  map_swrappers (delete_warn ("No such safe wrapper in claset: " ^ name) name) cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   664
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   665
(*Remove an unsafe wrapper*)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   666
fun cs delWrapper name =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   667
  map_uwrappers (delete_warn ("No such unsafe wrapper in claset: " ^ name) name) cs;
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   668
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   669
(* compose a safe tactic alternatively before/after safe_step_tac *)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   670
fun cs addSbefore (name, tac1) = cs addSWrapper (name, fn _ => fn tac2 => tac1 ORELSE' tac2);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   671
fun cs addSafter (name, tac2) = cs addSWrapper (name, fn _ => fn tac1 => tac1 ORELSE' tac2);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   672
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   673
(*compose a tactic alternatively before/after the step tactic *)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   674
fun cs addbefore (name, tac1) = cs addWrapper (name, fn _ => fn tac2 => tac1 APPEND' tac2);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   675
fun cs addafter (name, tac2) = cs addWrapper (name, fn _ => fn tac1 => tac1 APPEND' tac2);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   676
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   677
fun cs addD2 (name, thm) = cs addafter (name, datac thm 1);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   678
fun cs addE2 (name, thm) = cs addafter (name, eatac thm 1);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   679
fun cs addSD2 (name, thm) = cs addSafter (name, dmatch_tac [thm] THEN' eq_assume_tac);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   680
fun cs addSE2 (name, thm) = cs addSafter (name, ematch_tac [thm] THEN' eq_assume_tac);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   681
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   682
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   683
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   684
(**** Simple tactics for theorem proving ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   685
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   686
(*Attack subgoals using safe inferences -- matching, not resolution*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   687
fun safe_step_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   688
  let val {safe0_netpair, safep_netpair, ...} = rep_claset_of ctxt in
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   689
    appSWrappers ctxt
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   690
      (FIRST'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   691
       [eq_assume_tac,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   692
        eq_mp_tac,
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   693
        bimatch_from_nets_tac safe0_netpair,
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   694
        FIRST' Data.hyp_subst_tacs,
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   695
        bimatch_from_nets_tac safep_netpair])
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   696
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   697
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   698
(*Repeatedly attack a subgoal using safe inferences -- it's deterministic!*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   699
fun safe_steps_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   700
  REPEAT_DETERM1 o (fn i => COND (has_fewer_prems i) no_tac (safe_step_tac ctxt i));
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   701
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   702
(*Repeatedly attack subgoals using safe inferences -- it's deterministic!*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   703
fun safe_tac ctxt = REPEAT_DETERM1 (FIRSTGOAL (safe_steps_tac ctxt));
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   704
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   706
(*** 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
   707
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   708
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
   709
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   710
(*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
   711
  create precisely n subgoals.*)
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   712
fun n_bimatch_from_nets_tac n =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   713
  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
   714
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   715
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
   716
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
   717
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   718
(*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
   719
fun bimatch2_tac netpair i =
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   720
  n_bimatch_from_nets_tac 2 netpair i THEN
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   721
  (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
   722
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   723
(*Attack subgoals using safe inferences -- matching, not resolution*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   724
fun clarify_step_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   725
  let val {safe0_netpair, safep_netpair, ...} = rep_claset_of ctxt in
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   726
    appSWrappers ctxt
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   727
     (FIRST'
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   728
       [eq_assume_contr_tac,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   729
        bimatch_from_nets_tac safe0_netpair,
42792
85fb70b0c5e8 do not open ML structures;
wenzelm
parents: 42791
diff changeset
   730
        FIRST' Data.hyp_subst_tacs,
9938
cb6a7572d0a1 delrule: handle dest rules as well;
wenzelm
parents: 9899
diff changeset
   731
        n_bimatch_from_nets_tac 1 safep_netpair,
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   732
        bimatch2_tac safep_netpair])
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   733
  end;
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   734
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   735
fun clarify_tac ctxt = SELECT_GOAL (REPEAT_DETERM (clarify_step_tac ctxt 1));
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   736
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   737
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   738
(*** 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
   739
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   740
(*Backtracking is allowed among the various these unsafe ways of
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   741
  proving a subgoal.  *)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   742
fun inst0_step_tac ctxt =
32862
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   743
  assume_tac APPEND'
1fc86cec3bdf eliminated dead code and redundant parameters;
wenzelm
parents: 32740
diff changeset
   744
  contr_tac APPEND'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   745
  biresolve_from_nets_tac (#safe0_netpair (rep_claset_of ctxt));
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   746
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   747
(*These unsafe steps could generate more subgoals.*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   748
fun instp_step_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   749
  biresolve_from_nets_tac (#safep_netpair (rep_claset_of ctxt));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   750
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   751
(*These steps could instantiate variables and are therefore unsafe.*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   752
fun inst_step_tac ctxt = inst0_step_tac ctxt APPEND' instp_step_tac ctxt;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   753
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   754
fun haz_step_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   755
  biresolve_from_nets_tac (#haz_netpair (rep_claset_of ctxt));
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   756
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   757
(*Single step for the prover.  FAILS unless it makes progress. *)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   758
fun step_tac ctxt i =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   759
  safe_tac ctxt ORELSE appWrappers ctxt (inst_step_tac ctxt ORELSE' haz_step_tac ctxt) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   760
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   761
(*Using a "safe" rule to instantiate variables is unsafe.  This tactic
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   762
  allows backtracking from "safe" rules to "unsafe" rules here.*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   763
fun slow_step_tac ctxt i =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   764
  safe_tac ctxt ORELSE appWrappers ctxt (inst_step_tac ctxt APPEND' haz_step_tac ctxt) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   765
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   766
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   767
(**** The following tactics all fail unless they solve one goal ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   768
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   769
(*Dumb but fast*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   770
fun fast_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   771
  Object_Logic.atomize_prems_tac THEN' SELECT_GOAL (DEPTH_SOLVE (step_tac ctxt 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   772
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   773
(*Slower but smarter than fast_tac*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   774
fun best_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   775
  Object_Logic.atomize_prems_tac THEN'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   776
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (step_tac ctxt 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   777
9402
480a1b40fdd6 strengthened force_tac by using new first_best_tac
oheimb
parents: 9184
diff changeset
   778
(*even a bit smarter than best_tac*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   779
fun first_best_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   780
  Object_Logic.atomize_prems_tac THEN'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   781
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (FIRSTGOAL (step_tac ctxt)));
9402
480a1b40fdd6 strengthened force_tac by using new first_best_tac
oheimb
parents: 9184
diff changeset
   782
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   783
fun slow_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   784
  Object_Logic.atomize_prems_tac THEN'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   785
  SELECT_GOAL (DEPTH_SOLVE (slow_step_tac ctxt 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   786
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   787
fun slow_best_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   788
  Object_Logic.atomize_prems_tac THEN'
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   789
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, Data.sizef) (slow_step_tac ctxt 1));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   790
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   791
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   792
(***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
   793
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   794
val weight_ASTAR = 5;
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   795
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   796
fun astar_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   797
  Object_Logic.atomize_prems_tac THEN'
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   798
  SELECT_GOAL
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   799
    (ASTAR (has_fewer_prems 1, fn lev => fn thm => size_of_thm thm + weight_ASTAR * lev)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   800
      (step_tac ctxt 1));
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   801
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   802
fun slow_astar_tac ctxt =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35613
diff changeset
   803
  Object_Logic.atomize_prems_tac THEN'
10382
1fb807260ff1 atomize: all automated tactics that "solve" goals;
wenzelm
parents: 10309
diff changeset
   804
  SELECT_GOAL
42791
36f787ae5f70 eliminated weight_ASTAR: int Unsynchronized.ref (astar_tac appears to be obsolete anyway);
wenzelm
parents: 42790
diff changeset
   805
    (ASTAR (has_fewer_prems 1, fn lev => fn thm => size_of_thm thm + weight_ASTAR * lev)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   806
      (slow_step_tac ctxt 1));
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   807
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   808
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   809
(**** 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
   810
  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
   811
  easy theorems faster, but loses completeness -- and many of the harder
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   812
  theorems such as 43. ****)
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   813
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   814
(*Non-deterministic!  Could always expand the first unsafe connective.
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   815
  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
   816
  greater search depth required.*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   817
fun dup_step_tac ctxt =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   818
  biresolve_from_nets_tac (#dup_netpair (rep_claset_of ctxt));
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   819
5523
dc8cdc192cd0 added addD2, addE2, addSD2, and addSE2
oheimb
parents: 5028
diff changeset
   820
(*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
   821
local
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   822
  fun slow_step_tac' ctxt = appWrappers ctxt (instp_step_tac ctxt APPEND' dup_step_tac ctxt);
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   823
in
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   824
  fun depth_tac ctxt m i state = SELECT_GOAL
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   825
    (safe_steps_tac ctxt 1 THEN_ELSE
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   826
      (DEPTH_SOLVE (depth_tac ctxt m 1),
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   827
        inst0_step_tac ctxt 1 APPEND COND (K (m = 0)) no_tac
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   828
          (slow_step_tac' ctxt 1 THEN DEPTH_SOLVE (depth_tac ctxt (m - 1) 1)))) i state;
5757
0ad476dabbc6 corrected (and simplified) depth_tac
oheimb
parents: 5523
diff changeset
   829
end;
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   830
10736
7f94cb4517fa recover_order for single step tules;
wenzelm
parents: 10394
diff changeset
   831
(*Search, with depth bound m.
2173
08c68550460b Added a comment
paulson
parents: 2066
diff changeset
   832
  This is the "entry point", which does safe inferences first.*)
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   833
fun safe_depth_tac ctxt m = SUBGOAL (fn (prem, i) =>
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   834
  let
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   835
    val deti = (*No Vars in the goal?  No need to backtrack between goals.*)
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   836
      if exists_subterm (fn Var _ => true | _ => false) prem then DETERM else I;
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   837
  in
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   838
    SELECT_GOAL (TRY (safe_tac ctxt) THEN DEPTH_SOLVE (deti (depth_tac ctxt m 1))) i
42790
e07e56300faa misc tuning and simplification;
wenzelm
parents: 42439
diff changeset
   839
  end);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   840
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   841
fun deepen_tac ctxt = DEEPEN (2, 10) (safe_depth_tac ctxt);
24021
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   842
491c68f40bc4 added get_cs/map_cs;
wenzelm
parents: 23594
diff changeset
   843
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   844
(* attributes *)
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   845
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   846
fun attrib f =
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   847
  Thm.declaration_attribute (fn th => fn context => map_cs (f (SOME context) th) context);
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   848
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   849
val safe_elim = attrib o addSE;
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   850
val safe_intro = attrib o addSI;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   851
val safe_dest = attrib o addSD;
18691
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   852
val haz_elim = attrib o addE;
a2dc15d9d6c8 attributes: optional weight;
wenzelm
parents: 18688
diff changeset
   853
val haz_intro = attrib o addI;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   854
val haz_dest = attrib o addD;
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   855
val rule_del = attrib delrule o Context_Rules.rule_del;
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   856
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   857
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   858
5885
6c920d876098 tuned attribute names;
wenzelm
parents: 5841
diff changeset
   859
(** concrete syntax of attributes **)
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   860
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   861
val introN = "intro";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   862
val elimN = "elim";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   863
val destN = "dest";
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   864
30528
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   865
val setup_attrs =
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   866
  Attrib.setup @{binding swapped} (Scan.succeed swapped)
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   867
    "classical swap of introduction rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   868
  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
   869
    "declaration of Classical destruction rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   870
  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
   871
    "declaration of Classical elimination rule" #>
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   872
  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
   873
    "declaration of Classical introduction rule" #>
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   874
  Attrib.setup @{binding rule} (Scan.lift Args.del >> K rule_del)
7173bf123335 simplified attribute setup;
wenzelm
parents: 30513
diff changeset
   875
    "remove declaration of intro/elim/dest rule";
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   876
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   877
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   878
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   879
(** proof methods **)
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   880
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   881
local
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   882
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   883
fun some_rule_tac ctxt facts = SUBGOAL (fn (goal, i) =>
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   884
  let
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   885
    val [rules1, rules2, rules4] = Context_Rules.find_rules false facts goal ctxt;
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   886
    val {xtra_netpair, ...} = rep_claset_of ctxt;
33369
470a7b233ee5 modernized structure Context_Rules;
wenzelm
parents: 33339
diff changeset
   887
    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
   888
    val rules = rules1 @ rules2 @ rules3 @ rules4;
18223
20830cb4428c Drule.multi_resolves;
wenzelm
parents: 18015
diff changeset
   889
    val ruleq = Drule.multi_resolves facts rules;
12376
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   890
  in
480303e3fa08 simplified (and clarified) integration with Pure/ContextRules;
wenzelm
parents: 12362
diff changeset
   891
    Method.trace ctxt rules;
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32863
diff changeset
   892
    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
   893
  end)
21687
f689f729afab reorganized structure Goal vs. Tactic;
wenzelm
parents: 21646
diff changeset
   894
  THEN_ALL_NEW Goal.norm_hhf_tac;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   895
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   896
in
7281
2f454e1fd372 renamed 'some_rule' to 'rule';
wenzelm
parents: 7272
diff changeset
   897
30609
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   898
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
   899
  | 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
   900
983e8b6e4e69 Disposed old declarations, tactics, tactic combinators that refer to the simpset or claset of an implicit theory;
wenzelm
parents: 30558
diff changeset
   901
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
   902
  HEADGOAL (rule_tac ctxt rules facts) ORELSE
26470
e44d24620515 unfold_locales now part of default tactic
haftmann
parents: 26425
diff changeset
   903
  Class.default_intro_tac ctxt facts;
10309
a7f961fb62c6 intro_classes by default;
wenzelm
parents: 10185
diff changeset
   904
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   905
end;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   906
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   907
7230
4ca0d7839ff1 renamed 'single' to 'some_rule';
wenzelm
parents: 7154
diff changeset
   908
(* contradiction method *)
6502
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   909
7425
2089c70f2c6d Method.insert_tac;
wenzelm
parents: 7354
diff changeset
   910
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
   911
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   912
bc30e13b36a8 improved 'single' method;
wenzelm
parents: 6492
diff changeset
   913
(* automatic methods *)
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   914
5927
991483daa1a4 expoer cla_method('), cla_modifiers;
wenzelm
parents: 5885
diff changeset
   915
val cla_modifiers =
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   916
 [Args.$$$ destN -- Args.bang_colon >> K ((I, safe_dest NONE): Method.modifier),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   917
  Args.$$$ destN -- Args.colon >> K (I, haz_dest NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   918
  Args.$$$ elimN -- Args.bang_colon >> K (I, safe_elim NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   919
  Args.$$$ elimN -- Args.colon >> K (I, haz_elim NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   920
  Args.$$$ introN -- Args.bang_colon >> K (I, safe_intro NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   921
  Args.$$$ introN -- Args.colon >> K (I, haz_intro NONE),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   922
  Args.del -- Args.colon >> K (I, rule_del)];
5927
991483daa1a4 expoer cla_method('), cla_modifiers;
wenzelm
parents: 5885
diff changeset
   923
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   924
fun cla_method tac = Method.sections cla_modifiers >> K (SIMPLE_METHOD o tac);
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   925
fun cla_method' tac = Method.sections cla_modifiers >> K (SIMPLE_METHOD' o tac);
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   926
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   927
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   928
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   929
(** setup_methods **)
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   930
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   931
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
   932
  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
   933
   (Attrib.thms >> (fn rules => fn ctxt => METHOD (default_tac ctxt rules)))
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   934
    "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
   935
  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
   936
    (Attrib.thms >> (fn rules => fn ctxt => METHOD (HEADGOAL o rule_tac ctxt rules)))
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   937
    "apply some intro/elim rule (potentially classical)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   938
  Method.setup @{binding contradiction} (Scan.succeed (K contradiction))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   939
    "proof by contradiction" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   940
  Method.setup @{binding clarify} (cla_method' (CHANGED_PROP oo clarify_tac))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   941
    "repeatedly apply safe steps" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   942
  Method.setup @{binding fast} (cla_method' fast_tac) "classical prover (depth-first)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   943
  Method.setup @{binding slow} (cla_method' slow_tac) "classical prover (slow depth-first)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   944
  Method.setup @{binding best} (cla_method' best_tac) "classical prover (best-first)" #>
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   945
  Method.setup @{binding deepen} (cla_method' (fn ctxt => deepen_tac ctxt 4))
30541
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   946
    "classical prover (iterative deepening)" #>
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   947
  Method.setup @{binding safe} (cla_method (CHANGED_PROP o safe_tac))
9f168bdc468a simplified method setup;
wenzelm
parents: 30528
diff changeset
   948
    "classical prover (apply safe rules)";
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   949
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   950
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   951
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   952
(** theory setup **)
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   953
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   954
val setup = setup_attrs #> setup_methods;
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   955
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   956
8667
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   957
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   958
(** outer syntax **)
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   959
24867
e5b55d7be9bb simplified interfaces for outer syntax;
wenzelm
parents: 24358
diff changeset
   960
val _ =
36960
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   961
  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
   962
    Keyword.diag
26497
1873915c64a9 purely functional setup of claset/simpset/clasimpset;
wenzelm
parents: 26470
diff changeset
   963
    (Scan.succeed (Toplevel.no_timing o Toplevel.unknown_context o
42439
9efdd0af15ac eliminated Display.string_of_thm_without_context;
wenzelm
parents: 42361
diff changeset
   964
      Toplevel.keep (fn state =>
9efdd0af15ac eliminated Display.string_of_thm_without_context;
wenzelm
parents: 42361
diff changeset
   965
        let val ctxt = Toplevel.context_of state
42793
88bee9f6eec7 proper Proof.context for classical tactics;
wenzelm
parents: 42792
diff changeset
   966
        in print_claset ctxt end)));
8667
4230d17073ea print_simpset / print_claset command;
wenzelm
parents: 8519
diff changeset
   967
5841
d05df8752a8a local claset theory data;
wenzelm
parents: 5757
diff changeset
   968
end;