src/Pure/Isar/rule_insts.ML
author wenzelm
Sun, 01 Nov 2009 15:24:45 +0100
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child 36950 75b8f26f2f07
permissions -rw-r--r--
modernized structure Rule_Cases;
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(*  Title:      Pure/Isar/rule_insts.ML
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    Author:     Makarius
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Rule instantiations -- operations within a rule/subgoal context.
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*)
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signature BASIC_RULE_INSTS =
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sig
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  val read_instantiate: Proof.context -> (indexname * string) list -> thm -> thm
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  val instantiate_tac: Proof.context -> (indexname * string) list -> tactic
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  val res_inst_tac: Proof.context -> (indexname * string) list -> thm -> int -> tactic
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  val eres_inst_tac: Proof.context -> (indexname * string) list -> thm -> int -> tactic
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  val cut_inst_tac: Proof.context -> (indexname * string) list -> thm -> int -> tactic
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  val forw_inst_tac: Proof.context -> (indexname * string) list -> thm -> int -> tactic
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  val dres_inst_tac: Proof.context -> (indexname * string) list -> thm -> int -> tactic
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  val thin_tac: Proof.context -> string -> int -> tactic
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  val subgoal_tac: Proof.context -> string -> int -> tactic
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  val subgoals_tac: Proof.context -> string list -> int -> tactic
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  val method: (Proof.context -> (indexname * string) list -> thm -> int -> tactic) ->
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    (Proof.context -> thm list -> int -> tactic) -> (Proof.context -> Proof.method) context_parser
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end;
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signature RULE_INSTS =
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sig
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  include BASIC_RULE_INSTS
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  val make_elim_preserve: thm -> thm
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end;
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structure RuleInsts: RULE_INSTS =
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struct
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structure T = OuterLex;
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structure P = OuterParse;
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(** reading instantiations **)
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local
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fun is_tvar (x, _) = String.isPrefix "'" x;
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fun error_var msg xi = error (msg ^ Term.string_of_vname xi);
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fun the_sort tvars xi = the (AList.lookup (op =) tvars xi)
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  handle Option.Option => error_var "No such type variable in theorem: " xi;
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fun the_type vars xi = the (AList.lookup (op =) vars xi)
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  handle Option.Option => error_var "No such variable in theorem: " xi;
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fun unify_vartypes thy vars (xi, u) (unifier, maxidx) =
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  let
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    val T = the_type vars xi;
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    val U = Term.fastype_of u;
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    val maxidx' = Term.maxidx_term u (Int.max (#2 xi, maxidx));
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  in
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    Sign.typ_unify thy (T, U) (unifier, maxidx')
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      handle Type.TUNIFY => error_var "Incompatible type for instantiation of " xi
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  end;
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fun instantiate inst =
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  Term_Subst.instantiate ([], map (fn (xi, t) => ((xi, Term.fastype_of t), t)) inst) #>
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  Envir.beta_norm;
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fun make_instT f v =
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  let
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    val T = TVar v;
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    val T' = f T;
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  in if T = T' then NONE else SOME (T, T') end;
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fun make_inst f v =
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  let
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    val t = Var v;
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    val t' = f t;
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  in if t aconv t' then NONE else SOME (t, t') end;
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val add_used =
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  (Thm.fold_terms o fold_types o fold_atyps)
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    (fn TFree (a, _) => insert (op =) a
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      | TVar ((a, _), _) => insert (op =) a
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      | _ => I);
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in
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fun read_termTs ctxt schematic ss Ts =
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  let
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    fun parse T = if T = propT then Syntax.parse_prop ctxt else Syntax.parse_term ctxt;
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    val ts = map2 parse Ts ss;
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    val ts' =
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      map2 (TypeInfer.constrain o TypeInfer.paramify_vars) Ts ts
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      |> Syntax.check_terms ((schematic ? ProofContext.set_mode ProofContext.mode_schematic) ctxt)
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      |> Variable.polymorphic ctxt;
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    val Ts' = map Term.fastype_of ts';
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    val tyenv = fold Type.raw_match (Ts ~~ Ts') Vartab.empty;
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  in (ts', map (apsnd snd) (Vartab.dest tyenv)) end;
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fun read_insts ctxt mixed_insts (tvars, vars) =
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  let
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    val thy = ProofContext.theory_of ctxt;
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    val cert = Thm.cterm_of thy;
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    val certT = Thm.ctyp_of thy;
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    val (type_insts, term_insts) = List.partition (is_tvar o fst) mixed_insts;
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    val internal_insts = term_insts |> map_filter
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      (fn (xi, T.Term t) => SOME (xi, t)
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        | (_, T.Text _) => NONE
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        | (xi, _) => error_var "Term argument expected for " xi);
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    val external_insts = term_insts |> map_filter
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      (fn (xi, T.Text s) => SOME (xi, s) | _ => NONE);
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    (* mixed type instantiations *)
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    fun readT (xi, arg) =
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      let
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        val S = the_sort tvars xi;
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        val T =
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          (case arg of
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            T.Text s => Syntax.read_typ ctxt s
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          | T.Typ T => T
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          | _ => error_var "Type argument expected for " xi);
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      in
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        if Sign.of_sort thy (T, S) then ((xi, S), T)
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        else error_var "Incompatible sort for typ instantiation of " xi
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      end;
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    val type_insts1 = map readT type_insts;
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    val instT1 = Term_Subst.instantiateT type_insts1;
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    val vars1 = map (apsnd instT1) vars;
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    (* internal term instantiations *)
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    val instT2 = Envir.norm_type
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      (#1 (fold (unify_vartypes thy vars1) internal_insts (Vartab.empty, 0)));
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    val vars2 = map (apsnd instT2) vars1;
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    val internal_insts2 = map (apsnd (map_types instT2)) internal_insts;
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    val inst2 = instantiate internal_insts2;
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    (* external term instantiations *)
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    val (xs, strs) = split_list external_insts;
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    val Ts = map (the_type vars2) xs;
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    val (ts, inferred) = read_termTs ctxt false strs Ts;
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    val instT3 = Term.typ_subst_TVars inferred;
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    val vars3 = map (apsnd instT3) vars2;
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    val internal_insts3 = map (apsnd (map_types instT3)) internal_insts2;
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    val external_insts3 = xs ~~ ts;
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    val inst3 = instantiate external_insts3;
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    (* results *)
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    val type_insts3 = map (fn ((a, _), T) => (a, instT3 (instT2 T))) type_insts1;
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    val term_insts3 = internal_insts3 @ external_insts3;
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    val inst_tvars = map_filter (make_instT (instT3 o instT2 o instT1)) tvars;
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    val inst_vars = map_filter (make_inst (inst3 o inst2)) vars3;
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  in
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    ((type_insts3, term_insts3),
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      (map (pairself certT) inst_tvars, map (pairself cert) inst_vars))
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  end;
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fun read_instantiate_mixed ctxt mixed_insts thm =
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  let
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    val ctxt' = ctxt |> Variable.declare_thm thm
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      |> fold (fn a => Variable.declare_names (Logic.mk_type (TFree (a, dummyS)))) (add_used thm []);  (* FIXME tmp *)
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    val tvars = Thm.fold_terms Term.add_tvars thm [];
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    val vars = Thm.fold_terms Term.add_vars thm [];
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    val ((type_insts, term_insts), insts) = read_insts ctxt' (map snd mixed_insts) (tvars, vars);
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    val _ = (*assign internalized values*)
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      mixed_insts |> List.app (fn (arg, (xi, _)) =>
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        if is_tvar xi then
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          T.assign (SOME (T.Typ (the (AList.lookup (op =) type_insts xi)))) arg
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        else
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          T.assign (SOME (T.Term (the (AList.lookup (op =) term_insts xi)))) arg);
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  in
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    Drule.instantiate insts thm |> Rule_Cases.save thm
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  end;
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fun read_instantiate_mixed' ctxt (args, concl_args) thm =
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  let
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    fun zip_vars _ [] = []
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      | zip_vars (_ :: xs) ((_, NONE) :: rest) = zip_vars xs rest
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      | zip_vars ((x, _) :: xs) ((arg, SOME t) :: rest) = (arg, (x, t)) :: zip_vars xs rest
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      | zip_vars [] _ = error "More instantiations than variables in theorem";
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    val insts =
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      zip_vars (rev (Term.add_vars (Thm.full_prop_of thm) [])) args @
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      zip_vars (rev (Term.add_vars (Thm.concl_of thm) [])) concl_args;
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  in read_instantiate_mixed ctxt insts thm end;
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end;
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(* instantiation of rule or goal state *)
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fun read_instantiate ctxt args thm =
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  read_instantiate_mixed (ctxt |> ProofContext.set_mode ProofContext.mode_schematic)  (* FIXME !? *)
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    (map (fn (x, y) => (T.eof, (x, T.Text y))) args) thm;
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fun instantiate_tac ctxt args = PRIMITIVE (read_instantiate ctxt args);
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(** attributes **)
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(* where: named instantiation *)
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local
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val value =
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  Args.internal_typ >> T.Typ ||
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  Args.internal_term >> T.Term ||
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  Args.name_source >> T.Text;
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val inst = Args.var -- (Args.$$$ "=" |-- Scan.ahead P.not_eof -- value)
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  >> (fn (xi, (a, v)) => (a, (xi, v)));
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in
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val _ = Context.>> (Context.map_theory
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  (Attrib.setup (Binding.name "where")
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    (Scan.lift (P.and_list inst) >> (fn args =>
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      Thm.rule_attribute (fn context => read_instantiate_mixed (Context.proof_of context) args)))
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    "named instantiation of theorem"));
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end;
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(* of: positional instantiation (terms only) *)
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local
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val value =
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  Args.internal_term >> T.Term ||
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  Args.name_source >> T.Text;
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val inst = Scan.ahead P.not_eof -- Args.maybe value;
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val concl = Args.$$$ "concl" -- Args.colon;
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val insts =
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  Scan.repeat (Scan.unless concl inst) --
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  Scan.optional (concl |-- Scan.repeat inst) [];
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in
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val _ = Context.>> (Context.map_theory
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  (Attrib.setup (Binding.name "of")
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    (Scan.lift insts >> (fn args =>
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      Thm.rule_attribute (fn context => read_instantiate_mixed' (Context.proof_of context) args)))
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    "positional instantiation of theorem"));
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end;
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(** tactics **)
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(* resolution after lifting and instantation; may refer to parameters of the subgoal *)
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(* FIXME cleanup this mess!!! *)
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fun bires_inst_tac bires_flag ctxt insts thm =
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  let
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    val thy = ProofContext.theory_of ctxt;
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    (* Separate type and term insts *)
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    fun has_type_var ((x, _), _) =
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      (case Symbol.explode x of "'" :: _ => true | _ => false);
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    val Tinsts = filter has_type_var insts;
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    val tinsts = filter_out has_type_var insts;
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    (* Tactic *)
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    fun tac i st =
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      let
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        val (_, _, Bi, _) = Thm.dest_state (st, i);
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        val params = Logic.strip_params Bi;  (*params of subgoal i as string typ pairs*)
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        val params = rev (Term.rename_wrt_term Bi params)
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          (*as they are printed: bound variables with*)
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          (*the same name are renamed during printing*)
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        val (param_names, ctxt') = ctxt
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          |> Variable.declare_thm thm
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   285
          |> Thm.fold_terms Variable.declare_constraints st
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6976521b4263 renamed ProofContext.add_fixes_i to ProofContext.add_fixes, eliminated obsolete external version;
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          |> ProofContext.add_fixes (map (fn (x, T) => (Binding.name x, SOME T, NoSyn)) params);
25333
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        (* Process type insts: Tinsts_env *)
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        fun absent xi = error
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              ("No such variable in theorem: " ^ Term.string_of_vname xi);
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   291
        val (rtypes, rsorts) = Drule.types_sorts thm;
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   292
        fun readT (xi, s) =
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   293
            let val S = case rsorts xi of SOME S => S | NONE => absent xi;
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   294
                val T = Syntax.read_typ ctxt' s;
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   295
                val U = TVar (xi, S);
0c509c33cfb7 Syntax.read_typ;
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   296
            in if Sign.typ_instance thy (T, U) then (U, T)
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   297
               else error ("Instantiation of " ^ Term.string_of_vname xi ^ " fails")
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   298
            end;
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   299
        val Tinsts_env = map readT Tinsts;
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        (* Preprocess rule: extract vars and their types, apply Tinsts *)
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        fun get_typ xi =
0c509c33cfb7 Syntax.read_typ;
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   302
          (case rtypes xi of
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   303
               SOME T => typ_subst_atomic Tinsts_env T
0c509c33cfb7 Syntax.read_typ;
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   304
             | NONE => absent xi);
0c509c33cfb7 Syntax.read_typ;
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   305
        val (xis, ss) = Library.split_list tinsts;
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   306
        val Ts = map get_typ xis;
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   307
0c509c33cfb7 Syntax.read_typ;
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   308
        val (ts, envT) = read_termTs ctxt' true ss Ts;
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        val envT' = map (fn (ixn, T) =>
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          (TVar (ixn, the (rsorts ixn)), T)) envT @ Tinsts_env;
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        val cenv =
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          map
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            (fn (xi, t) =>
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              pairself (Thm.cterm_of thy) (Var (xi, fastype_of t), t))
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            (distinct
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              (fn ((x1, t1), (x2, t2)) => x1 = x2 andalso t1 aconv t2)
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   317
              (xis ~~ ts));
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   318
        (* Lift and instantiate rule *)
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        val {maxidx, ...} = rep_thm st;
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        val paramTs = map #2 params
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   321
        and inc = maxidx+1
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   322
        fun liftvar (Var ((a,j), T)) =
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   323
              Var((a, j+inc), paramTs ---> Logic.incr_tvar inc T)
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   324
          | liftvar t = raise TERM("Variable expected", [t]);
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   325
        fun liftterm t = list_abs_free
25333
0c509c33cfb7 Syntax.read_typ;
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   326
              (param_names ~~ paramTs, Logic.incr_indexes(paramTs,inc) t)
20336
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   327
        fun liftpair (cv,ct) =
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   328
              (cterm_fun liftvar cv, cterm_fun liftterm ct)
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   329
        val lifttvar = pairself (ctyp_of thy o Logic.incr_tvar inc);
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   330
        val rule = Drule.instantiate
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   331
              (map lifttvar envT', map liftpair cenv)
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   332
              (Thm.lift_rule (Thm.cprem_of st i) thm)
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   333
      in
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   334
        if i > nprems_of st then no_tac st
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   335
        else st |>
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   336
          compose_tac (bires_flag, rule, nprems_of thm) i
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   337
      end
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   338
           handle TERM (msg,_)   => (warning msg; no_tac st)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   339
                | THM  (msg,_,_) => (warning msg; no_tac st);
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   340
  in tac end;
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   341
27120
b21eec437295 added (e)res_inst_tac;
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   342
val res_inst_tac = bires_inst_tac false;
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   343
val eres_inst_tac = bires_inst_tac true;
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   344
b21eec437295 added (e)res_inst_tac;
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   345
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   346
(* forward resolution *)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   347
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   348
fun make_elim_preserve rl =
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   349
  let
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   350
    val cert = Thm.cterm_of (Thm.theory_of_thm rl);
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   351
    val maxidx = Thm.maxidx_of rl;
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   352
    fun cvar xi = cert (Var (xi, propT));
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   353
    val revcut_rl' =
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   354
      instantiate ([], [(cvar ("V", 0), cvar ("V", maxidx + 1)),
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   355
        (cvar ("W", 0), cvar ("W", maxidx + 1))]) Drule.revcut_rl;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   356
  in
31945
d5f186aa0bed structure Thm: less pervasive names;
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   357
    (case Seq.list_of (Thm.bicompose false (false, rl, Thm.nprems_of rl) 1 revcut_rl') of
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   358
      [th] => th
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   359
    | _ => raise THM ("make_elim_preserve", 1, [rl]))
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   360
  end;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   361
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   362
(*instantiate and cut -- for atomic fact*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   363
fun cut_inst_tac ctxt insts rule = res_inst_tac ctxt insts (make_elim_preserve rule);
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
diff changeset
   364
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   365
(*forward tactic applies a rule to an assumption without deleting it*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   366
fun forw_inst_tac ctxt insts rule = cut_inst_tac ctxt insts rule THEN' assume_tac;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
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   367
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   368
(*dresolve tactic applies a rule to replace an assumption*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   369
fun dres_inst_tac ctxt insts rule = eres_inst_tac ctxt insts (make_elim_preserve rule);
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   370
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   371
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   372
(* derived tactics *)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   373
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
diff changeset
   374
(*deletion of an assumption*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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   375
fun thin_tac ctxt s = eres_inst_tac ctxt [(("V", 0), s)] Drule.thin_rl;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   376
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
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diff changeset
   377
(*Introduce the given proposition as lemma and subgoal*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   378
fun subgoal_tac ctxt A = DETERM o res_inst_tac ctxt [(("psi", 0), A)] cut_rl;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   379
fun subgoals_tac ctxt As = EVERY' (map (subgoal_tac ctxt) As);
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
diff changeset
   380
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   381
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
diff changeset
   382
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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parents: 27236
diff changeset
   383
(** methods **)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
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diff changeset
   384
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
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diff changeset
   385
(* rule_tac etc. -- refer to dynamic goal state! *)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
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diff changeset
   386
30545
8209a7196389 export method parser;
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diff changeset
   387
fun method inst_tac tac =
30515
bca05b17b618 simplified method setup;
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diff changeset
   388
  Args.goal_spec --
bca05b17b618 simplified method setup;
wenzelm
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diff changeset
   389
  Scan.optional (Scan.lift
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   390
    (P.and_list1 (Args.var -- (Args.$$$ "=" |-- P.!!! Args.name_source)) --| Args.$$$ "in")) [] --
bca05b17b618 simplified method setup;
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diff changeset
   391
  Attrib.thms >>
bca05b17b618 simplified method setup;
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diff changeset
   392
  (fn ((quant, insts), thms) => fn ctxt => METHOD (fn facts =>
30551
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   393
    if null insts then quant (Method.insert_tac facts THEN' tac ctxt thms)
30515
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   394
    else
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   395
      (case thms of
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   396
        [thm] => quant (Method.insert_tac facts THEN' inst_tac ctxt insts thm)
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   397
      | _ => error "Cannot have instantiations with multiple rules")));
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   398
30551
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   399
val res_inst_meth = method res_inst_tac (K Tactic.resolve_tac);
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   400
val eres_inst_meth = method eres_inst_tac (K Tactic.eresolve_tac);
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   401
val cut_inst_meth = method cut_inst_tac (K Tactic.cut_rules_tac);
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   402
val dres_inst_meth = method dres_inst_tac (K Tactic.dresolve_tac);
24e156db414c method parser: pass proper context;
wenzelm
parents: 30545
diff changeset
   403
val forw_inst_meth = method forw_inst_tac (K Tactic.forward_tac);
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   404
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   405
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   406
(* setup *)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   407
26463
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
diff changeset
   408
val _ = Context.>> (Context.map_theory
30515
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   409
 (Method.setup (Binding.name "rule_tac") res_inst_meth "apply rule (dynamic instantiation)" #>
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   410
  Method.setup (Binding.name "erule_tac") eres_inst_meth
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   411
    "apply rule in elimination manner (dynamic instantiation)" #>
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   412
  Method.setup (Binding.name "drule_tac") dres_inst_meth
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   413
    "apply rule in destruct manner (dynamic instantiation)" #>
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   414
  Method.setup (Binding.name "frule_tac") forw_inst_meth
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    "apply rule in forward manner (dynamic instantiation)" #>
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  Method.setup (Binding.name "cut_tac") cut_inst_meth "cut rule (dynamic instantiation)" #>
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  Method.setup (Binding.name "subgoal_tac")
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    (Args.goal_spec -- Scan.lift (Scan.repeat1 Args.name_source) >>
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      (fn (quant, props) => fn ctxt => SIMPLE_METHOD'' quant (subgoals_tac ctxt props)))
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    "insert subgoal (dynamic instantiation)" #>
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  Method.setup (Binding.name "thin_tac")
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    (Args.goal_spec -- Scan.lift Args.name_source >>
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      (fn (quant, prop) => fn ctxt => SIMPLE_METHOD'' quant (thin_tac ctxt prop)))
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      "remove premise (dynamic instantiation)"));
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aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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end;
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27245
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structure BasicRuleInsts: BASIC_RULE_INSTS = RuleInsts;
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open BasicRuleInsts;