src/Pure/Isar/rule_insts.ML
author wenzelm
Thu, 07 Aug 2008 19:21:41 +0200
changeset 27779 4569003b8813
parent 27378 0968c0d0b969
child 27809 a1e409db516b
permissions -rw-r--r--
simplified Antiq: regular SymbolPos.text with position; renamed read_arguments to read_antiq; tuned;
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(*  Title:      Pure/Isar/rule_insts.ML
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    ID:         $Id$
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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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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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(** 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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  TermSubst.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, Args.Term t) => SOME (xi, t)
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        | (_, Args.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, Args.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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            Args.Text s => Syntax.read_typ ctxt s
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          | Args.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 = TermSubst.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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          Args.assign (SOME (Args.Typ (the (AList.lookup (op =) type_insts xi)))) arg
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        else
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          Args.assign (SOME (Args.Term (the (AList.lookup (op =) term_insts xi)))) arg);
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  in
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    Drule.instantiate insts thm |> RuleCases.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) => (Args.eof, (x, Args.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 >> Args.Typ ||
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  Args.internal_term >> Args.Term ||
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  Args.name >> Args.Text;
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val inst = Args.var -- (Args.$$$ "=" |-- Args.ahead -- value)
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  >> (fn (xi, (a, v)) => (a, (xi, v)));
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in
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val where_att = Attrib.syntax (Args.and_list (Scan.lift inst) >> (fn args =>
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  Thm.rule_attribute (fn context => read_instantiate_mixed (Context.proof_of context) args)));
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end;
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(* of: positional instantiation (terms only) *)
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local
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val value =
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  Args.internal_term >> Args.Term ||
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  Args.name >> Args.Text;
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val inst = Args.ahead -- Args.maybe value;
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val concl = Args.$$$ "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 of_att = Attrib.syntax (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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end;
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(* setup *)
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26463
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val _ = Context.>> (Context.map_theory
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  (Attrib.add_attributes
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   [("where", where_att, "named instantiation of theorem"),
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    ("of", of_att, "positional instantiation of theorem")]));
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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, _), _) = (case Symbol.explode x of
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          "'"::cs => true | cs => false);
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    val Tinsts = List.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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          |> Thm.fold_terms Variable.declare_constraints st
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          |> ProofContext.add_fixes_i (map (fn (x, T) => (x, SOME T, NoSyn)) params);
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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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        val (rtypes, rsorts) = Drule.types_sorts thm;
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        fun readT (xi, s) =
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diff changeset
   291
            let val S = case rsorts xi of SOME S => S | NONE => absent xi;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   292
                val T = Syntax.read_typ ctxt' s;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   293
                val U = TVar (xi, S);
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   294
            in if Sign.typ_instance thy (T, U) then (U, T)
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   295
               else error ("Instantiation of " ^ Term.string_of_vname xi ^ " fails")
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   296
            end;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   297
        val Tinsts_env = map readT Tinsts;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   298
        (* Preprocess rule: extract vars and their types, apply Tinsts *)
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   299
        fun get_typ xi =
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   300
          (case rtypes xi of
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   301
               SOME T => typ_subst_atomic Tinsts_env T
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   302
             | NONE => absent xi);
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   303
        val (xis, ss) = Library.split_list tinsts;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   304
        val Ts = map get_typ xis;
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   305
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   306
        val (ts, envT) = read_termTs ctxt' true ss Ts;
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   307
        val envT' = map (fn (ixn, T) =>
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   308
          (TVar (ixn, the (rsorts ixn)), T)) envT @ Tinsts_env;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   309
        val cenv =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   310
          map
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   311
            (fn (xi, t) =>
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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parents:
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   312
              pairself (Thm.cterm_of thy) (Var (xi, fastype_of t), t))
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   313
            (distinct
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   314
              (fn ((x1, t1), (x2, t2)) => x1 = x2 andalso t1 aconv t2)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   315
              (xis ~~ ts));
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   316
        (* Lift and instantiate rule *)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
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   317
        val {maxidx, ...} = rep_thm st;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   318
        val paramTs = map #2 params
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   319
        and inc = maxidx+1
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   320
        fun liftvar (Var ((a,j), T)) =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   321
              Var((a, j+inc), paramTs ---> Logic.incr_tvar inc T)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   322
          | liftvar t = raise TERM("Variable expected", [t]);
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   323
        fun liftterm t = list_abs_free
25333
0c509c33cfb7 Syntax.read_typ;
wenzelm
parents: 25329
diff changeset
   324
              (param_names ~~ paramTs, Logic.incr_indexes(paramTs,inc) t)
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   325
        fun liftpair (cv,ct) =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   326
              (cterm_fun liftvar cv, cterm_fun liftterm ct)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   327
        val lifttvar = pairself (ctyp_of thy o Logic.incr_tvar inc);
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   328
        val rule = Drule.instantiate
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   329
              (map lifttvar envT', map liftpair cenv)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   330
              (Thm.lift_rule (Thm.cprem_of st i) thm)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   331
      in
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   332
        if i > nprems_of st then no_tac st
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   333
        else st |>
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   334
          compose_tac (bires_flag, rule, nprems_of thm) i
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   335
      end
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   336
           handle TERM (msg,_)   => (warning msg; no_tac st)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   337
                | THM  (msg,_,_) => (warning msg; no_tac st);
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   338
  in tac end;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   339
27120
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   340
val res_inst_tac = bires_inst_tac false;
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   341
val eres_inst_tac = bires_inst_tac true;
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   342
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   343
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   344
(* forward resolution *)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   345
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   346
fun make_elim_preserve rl =
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   347
  let
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   348
    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);
wenzelm
parents: 27236
diff changeset
   349
    val maxidx = Thm.maxidx_of rl;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   350
    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);
wenzelm
parents: 27236
diff changeset
   351
    val revcut_rl' =
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   352
      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);
wenzelm
parents: 27236
diff changeset
   353
        (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);
wenzelm
parents: 27236
diff changeset
   354
  in
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   355
    (case Seq.list_of (bicompose false (false, rl, Thm.nprems_of rl) 1 revcut_rl') of
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   356
      [th] => th
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   357
    | _ => 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);
wenzelm
parents: 27236
diff changeset
   358
  end;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   359
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   360
(*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);
wenzelm
parents: 27236
diff changeset
   361
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);
wenzelm
parents: 27236
diff changeset
   362
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   363
(*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);
wenzelm
parents: 27236
diff changeset
   364
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);
wenzelm
parents: 27236
diff changeset
   365
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   366
(*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);
wenzelm
parents: 27236
diff changeset
   367
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);
wenzelm
parents: 27236
diff changeset
   368
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   369
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   370
(* derived tactics *)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   371
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   372
(*deletion of an assumption*)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   373
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);
wenzelm
parents: 27236
diff changeset
   374
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   375
(*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);
wenzelm
parents: 27236
diff changeset
   376
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);
wenzelm
parents: 27236
diff changeset
   377
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);
wenzelm
parents: 27236
diff changeset
   378
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   379
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   380
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   381
(** methods **)
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   382
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   383
(* 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
parents: 27236
diff changeset
   384
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   385
local
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   386
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   387
fun gen_inst _ tac _ (quant, ([], thms)) =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   388
      Method.METHOD (fn facts => quant (Method.insert_tac facts THEN' tac thms))
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   389
  | gen_inst inst_tac _ ctxt (quant, (insts, [thm])) =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   390
      Method.METHOD (fn facts =>
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   391
        quant (Method.insert_tac facts THEN' inst_tac ctxt insts thm))
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   392
  | gen_inst _ _ _ _ = error "Cannot have instantiations with multiple rules";
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   393
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   394
in
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   395
27120
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   396
val res_inst_meth = gen_inst res_inst_tac Tactic.resolve_tac;
b21eec437295 added (e)res_inst_tac;
wenzelm
parents: 26463
diff changeset
   397
val eres_inst_meth = gen_inst eres_inst_tac Tactic.eresolve_tac;
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   398
val cut_inst_meth = gen_inst cut_inst_tac Tactic.cut_rules_tac;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   399
val dres_inst_meth = gen_inst dres_inst_tac Tactic.dresolve_tac;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   400
val forw_inst_meth = gen_inst forw_inst_tac Tactic.forward_tac;
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   401
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
diff changeset
   402
end;
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   403
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
(* method syntax *)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   406
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   407
val insts =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   408
  Scan.optional
27378
wenzelm
parents: 27282
diff changeset
   409
    (Args.and_list1 (Scan.lift (Args.name -- (Args.$$$ "=" |-- Args.!!! Args.name))) --|
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   410
      Scan.lift (Args.$$$ "in")) [] -- Attrib.thms;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   411
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   412
fun inst_args f src ctxt =
21879
a3efbae45735 switched argument order in *.syntax lifters
haftmann
parents: 21500
diff changeset
   413
  f ctxt (fst (Method.syntax (Args.goal_spec HEADGOAL -- insts) src ctxt));
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   414
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   415
val insts_var =
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   416
  Scan.optional
27378
wenzelm
parents: 27282
diff changeset
   417
    (Args.and_list1 (Scan.lift (Args.var -- (Args.$$$ "=" |-- Args.!!! Args.name))) --|
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   418
      Scan.lift (Args.$$$ "in")) [] -- Attrib.thms;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   419
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
wenzelm
parents:
diff changeset
   420
fun inst_args_var f src ctxt =
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  f ctxt (fst (Method.syntax (Args.goal_spec HEADGOAL -- insts_var) src ctxt));
20336
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   422
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   423
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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(* setup *)
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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26463
9283b4185fdf Context.>> : operate on Context.generic;
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val _ = Context.>> (Context.map_theory
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   427
  (Method.add_methods
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   428
   [("rule_tac", inst_args_var res_inst_meth,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   429
      "apply rule (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   430
    ("erule_tac", inst_args_var eres_inst_meth,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
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   431
      "apply rule in elimination manner (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
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   432
    ("drule_tac", inst_args_var dres_inst_meth,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   433
      "apply rule in destruct manner (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   434
    ("frule_tac", inst_args_var forw_inst_meth,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
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   435
      "apply rule in forward manner (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
diff changeset
   436
    ("cut_tac", inst_args_var cut_inst_meth,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   437
      "cut rule (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
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   438
    ("subgoal_tac", Method.goal_args_ctxt (Scan.repeat1 Args.name) subgoals_tac,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
parents: 26435
diff changeset
   439
      "insert subgoal (dynamic instantiation)"),
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
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   440
    ("thin_tac", Method.goal_args_ctxt Args.name thin_tac,
9283b4185fdf Context.>> : operate on Context.generic;
wenzelm
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   441
      "remove premise (dynamic instantiation)")]));
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aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   443
end;
aac494583949 Rule instantiations -- operations within a rule/subgoal context.
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   444
27245
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
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   445
structure BasicRuleInsts: BASIC_RULE_INSTS = RuleInsts;
817d34377170 added instantiate_tac, cut_inst_tac, forw_inst_tac, dres_inst_tac, make_elim_preserve (from tactic.ML);
wenzelm
parents: 27236
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open BasicRuleInsts;
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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   447