src/Pure/simplifier.ML
author wenzelm
Fri, 17 Jun 2005 18:35:27 +0200
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accomodate change of TheoryDataFun; accomodate identification of type Sign.sg and theory;
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(*  Title:      Pure/simplifier.ML
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    ID:         $Id$
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    Author:     Tobias Nipkow and Markus Wenzel, TU Muenchen
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Generic simplifier, suitable for most logics (see also
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meta_simplifier.ML for the actual meta-level rewriting engine).
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*)
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(* added: put_delta_simpset, get_delta_simpset
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   changed: simp_add_local
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   07/01/05
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*)
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signature BASIC_SIMPLIFIER =
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sig
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  include BASIC_META_SIMPLIFIER
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  type context_solver
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  val mk_context_solver: string -> (Proof.context -> thm list -> int -> tactic)
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    -> context_solver
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  type context_simproc
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  val mk_context_simproc: string -> cterm list ->
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    (Proof.context -> simpset -> term -> thm option) -> context_simproc
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  val print_simpset: theory -> unit
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  val simpset_ref_of_sg: theory -> simpset ref    (*obsolete*)
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  val simpset_ref_of: theory -> simpset ref
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  val simpset_of_sg: theory -> simpset            (*obsolete*)
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  val simpset_of: theory -> simpset
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  val SIMPSET: (simpset -> tactic) -> tactic
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  val SIMPSET': (simpset -> 'a -> tactic) -> 'a -> tactic
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  val simpset: unit -> simpset
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  val simpset_ref: unit -> simpset ref
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  val Addsimps: thm list -> unit
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  val Delsimps: thm list -> unit
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  val Addsimprocs: simproc list -> unit
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  val Delsimprocs: simproc list -> unit
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  val Addcongs: thm list -> unit
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  val Delcongs: thm list -> unit
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  val local_simpset_of: Proof.context -> simpset
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  val safe_asm_full_simp_tac: simpset -> int -> tactic
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  val               simp_tac: simpset -> int -> tactic
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  val           asm_simp_tac: simpset -> int -> tactic
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  val          full_simp_tac: simpset -> int -> tactic
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  val        asm_lr_simp_tac: simpset -> int -> tactic
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  val      asm_full_simp_tac: simpset -> int -> tactic
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  val               Simp_tac:            int -> tactic
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  val           Asm_simp_tac:            int -> tactic
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  val          Full_simp_tac:            int -> tactic
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  val        Asm_lr_simp_tac:            int -> tactic
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  val      Asm_full_simp_tac:            int -> tactic
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  val          simplify: simpset -> thm -> thm
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  val      asm_simplify: simpset -> thm -> thm
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  val     full_simplify: simpset -> thm -> thm
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  val   asm_lr_simplify: simpset -> thm -> thm
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  val asm_full_simplify: simpset -> thm -> thm
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end;
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signature SIMPLIFIER =
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sig
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  include BASIC_SIMPLIFIER
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  val simproc_i: theory -> string -> term list
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    -> (theory -> simpset -> term -> thm option) -> simproc
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  val simproc: theory -> string -> string list
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    -> (theory -> simpset -> term -> thm option) -> simproc
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  val context_simproc_i: theory -> string -> term list
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    -> (Proof.context -> simpset -> term -> thm option) -> context_simproc
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  val context_simproc: theory -> string -> string list
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    -> (Proof.context -> simpset -> term -> thm option) -> context_simproc
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  val          rewrite: simpset -> cterm -> thm
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  val      asm_rewrite: simpset -> cterm -> thm
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  val     full_rewrite: simpset -> cterm -> thm
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  val   asm_lr_rewrite: simpset -> cterm -> thm
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  val asm_full_rewrite: simpset -> cterm -> thm
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  val add_context_simprocs: context_simproc list -> theory -> theory
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  val del_context_simprocs: context_simproc list -> theory -> theory
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  val set_context_subgoaler: (Proof.context -> simpset -> int -> tactic) -> theory -> theory
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  val reset_context_subgoaler: theory -> theory
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  val add_context_looper: string * (Proof.context -> int -> Tactical.tactic) ->
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    theory -> theory
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  val del_context_looper: string -> theory -> theory
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  val add_context_unsafe_solver: context_solver -> theory -> theory
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  val add_context_safe_solver: context_solver -> theory -> theory
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  val print_local_simpset: Proof.context -> unit
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  val get_local_simpset: Proof.context -> simpset
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  val put_local_simpset: simpset -> Proof.context -> Proof.context
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  val change_global_ss: (simpset * thm list -> simpset) -> theory attribute
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  val change_local_ss: (simpset * thm list -> simpset) -> Proof.context attribute
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  val simp_add_global: theory attribute
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  val simp_del_global: theory attribute
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  val simp_add_local: Proof.context attribute
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  val simp_del_local: Proof.context attribute
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  val cong_add_global: theory attribute
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  val cong_del_global: theory attribute
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  val cong_add_local: Proof.context attribute
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  val cong_del_local: Proof.context attribute
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  val change_simpset_of: (simpset * 'a -> simpset) -> 'a -> theory -> theory
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  val simp_modifiers: (Args.T list -> (Method.modifier * Args.T list)) list
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  val method_setup: (Args.T list -> (Method.modifier * Args.T list)) list
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    -> (theory -> theory) list
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  val easy_setup: thm -> thm list -> (theory -> theory) list
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  val get_delta_simpset: ProofContext.context -> Thm.thm list
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  val put_delta_simpset: Thm.thm list -> ProofContext.context -> ProofContext.context
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end;
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structure Simplifier: SIMPLIFIER =
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struct
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open MetaSimplifier;
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(** context dependent simpset components **)
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(* datatype context_solver *)
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datatype context_solver =
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  ContextSolver of (string * (Proof.context -> thm list -> int -> tactic)) * stamp;
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fun mk_context_solver name f = ContextSolver ((name, f), stamp ());
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fun eq_context_solver (ContextSolver (_, id1), ContextSolver (_, id2)) = (id1 = id2);
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val merge_context_solvers = gen_merge_lists eq_context_solver;
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(* datatype context_simproc *)
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datatype context_simproc = ContextSimproc of
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  (string * cterm list * (Proof.context -> simpset -> term -> thm option)) * stamp;
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fun mk_context_simproc name lhss f = ContextSimproc ((name, lhss, f), stamp ());
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fun eq_context_simproc (ContextSimproc (_, id1), ContextSimproc (_, id2)) = (id1 = id2);
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val merge_context_simprocs = gen_merge_lists eq_context_simproc;
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fun context_simproc_i thy name =
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  mk_context_simproc name o map (Thm.cterm_of thy o Logic.varify);
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fun context_simproc thy name =
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  context_simproc_i thy name o map (Sign.simple_read_term thy TypeInfer.logicT);
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(* datatype context_ss *)
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datatype context_ss = ContextSS of
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 {simprocs: context_simproc list,
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  subgoal_tac: (Proof.context -> simpset -> int -> tactic) option,
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  loop_tacs: (string * (Proof.context -> int -> tactic)) list,
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  unsafe_solvers: context_solver list,
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  solvers: context_solver list};
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fun context_ss ctxt ss ctxt_ss =
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  let
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    val ContextSS {simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers} = ctxt_ss;
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    fun prep_simproc (ContextSimproc ((name, lhss, f), _)) =
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      mk_simproc name lhss (K (f ctxt));
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    fun add_loop (name, f) simpset = simpset addloop (name, f ctxt);
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    fun add_solver add (ContextSolver ((name, f), _)) simpset =
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      add (simpset, mk_solver name (f ctxt));
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  in
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    ((case subgoal_tac of NONE => ss | SOME tac => ss setsubgoaler tac ctxt)
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      addsimprocs map prep_simproc simprocs)
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    |> fold_rev add_loop loop_tacs
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    |> fold_rev (add_solver (op addSolver)) unsafe_solvers
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    |> fold_rev (add_solver (op addSSolver)) solvers
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  end;
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fun make_context_ss (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =
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  ContextSS {simprocs = simprocs, subgoal_tac = subgoal_tac, loop_tacs = loop_tacs,
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    unsafe_solvers = unsafe_solvers, solvers = solvers};
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val empty_context_ss = make_context_ss ([], NONE, [], [], []);
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fun merge_context_ss (ctxt_ss1, ctxt_ss2) =
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  let
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    val ContextSS {simprocs = simprocs1, subgoal_tac = subgoal_tac1, loop_tacs = loop_tacs1,
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      unsafe_solvers = unsafe_solvers1, solvers = solvers1} = ctxt_ss1;
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    val ContextSS {simprocs = simprocs2, subgoal_tac = subgoal_tac2, loop_tacs = loop_tacs2,
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      unsafe_solvers = unsafe_solvers2, solvers = solvers2} = ctxt_ss2;
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    val simprocs' = merge_context_simprocs simprocs1 simprocs2;
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    val subgoal_tac' = (case subgoal_tac1 of NONE => subgoal_tac2 | some => some);
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    val loop_tacs' = merge_alists loop_tacs1 loop_tacs2;
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    val unsafe_solvers' = merge_context_solvers unsafe_solvers1 unsafe_solvers2;
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    val solvers' = merge_context_solvers solvers1 solvers2;
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  in make_context_ss (simprocs', subgoal_tac', loop_tacs', unsafe_solvers', solvers') end;
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(** global and local simpset data **)
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(* theory data kind 'Pure/simpset' *)
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structure GlobalSimpset = TheoryDataFun
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(struct
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  val name = "Pure/simpset";
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  type T = simpset ref * context_ss;
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  val empty = (ref empty_ss, empty_context_ss);
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  fun copy (ref ss, ctxt_ss) = (ref ss, ctxt_ss): T;            (*create new reference!*)
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  val extend = copy;
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  fun merge _ ((ref ss1, ctxt_ss1), (ref ss2, ctxt_ss2)) =
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    (ref (merge_ss (ss1, ss2)), merge_context_ss (ctxt_ss1, ctxt_ss2));
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  fun print _ (ref ss, _) = print_ss ss;
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end);
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val _ = Context.add_setup [GlobalSimpset.init];
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val print_simpset = GlobalSimpset.print;
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val simpset_ref_of = #1 o GlobalSimpset.get;
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val simpset_ref_of_sg = simpset_ref_of;
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val get_context_ss = #2 o GlobalSimpset.get o ProofContext.theory_of;
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fun map_context_ss f = GlobalSimpset.map (apsnd
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  (fn ContextSS {simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers} =>
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    make_context_ss (f (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers))));
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(* access global simpset *)
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val simpset_of = ! o simpset_ref_of;
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val simpset_of_sg = simpset_of;
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fun SIMPSET tacf state = tacf (simpset_of (Thm.theory_of_thm state)) state;
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fun SIMPSET' tacf i state = tacf (simpset_of (Thm.theory_of_thm state)) i state;
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val simpset = simpset_of o Context.the_context;
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val simpset_ref = simpset_ref_of o Context.the_context;
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(* change global simpset *)
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fun change_simpset_of f x thy =
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  let val r = simpset_ref_of thy
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  in r := f (! r, x); thy end;
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fun change_simpset f x = (change_simpset_of f x (Context.the_context ()); ());
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val Addsimps = change_simpset (op addsimps);
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val Delsimps = change_simpset (op delsimps);
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val Addsimprocs = change_simpset (op addsimprocs);
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val Delsimprocs = change_simpset (op delsimprocs);
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val Addcongs = change_simpset (op addcongs);
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val Delcongs = change_simpset (op delcongs);
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(* change context dependent components *)
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fun add_context_simprocs procs =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (merge_context_simprocs procs simprocs, subgoal_tac, loop_tacs,
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      unsafe_solvers, solvers));
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fun del_context_simprocs procs =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (gen_rems eq_context_simproc (simprocs, procs), subgoal_tac, loop_tacs,
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      unsafe_solvers, solvers));
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fun set_context_subgoaler tac =
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  map_context_ss (fn (simprocs, _, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, SOME tac, loop_tacs, unsafe_solvers, solvers));
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val reset_context_subgoaler =
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  map_context_ss (fn (simprocs, _, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, NONE, loop_tacs, unsafe_solvers, solvers));
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fun add_context_looper (name, tac) =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, subgoal_tac, merge_alists [(name, tac)] loop_tacs,
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      unsafe_solvers, solvers));
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fun del_context_looper name =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, subgoal_tac, filter_out (equal name o #1) loop_tacs,
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      unsafe_solvers, solvers));
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fun add_context_unsafe_solver solver =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, subgoal_tac, loop_tacs,
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      merge_context_solvers [solver] unsafe_solvers, solvers));
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fun add_context_safe_solver solver =
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  map_context_ss (fn (simprocs, subgoal_tac, loop_tacs, unsafe_solvers, solvers) =>
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    (simprocs, subgoal_tac, loop_tacs, unsafe_solvers,
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      merge_context_solvers [solver] solvers));
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(* proof data kind 'Pure/simpset' *)
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structure LocalSimpset = ProofDataFun
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(struct
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  val name = "Pure/simpset";
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  type T = simpset;
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  val init = simpset_of;
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  fun print ctxt ss = print_ss (context_ss ctxt ss (get_context_ss ctxt));
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end);
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val _ = Context.add_setup [LocalSimpset.init];
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val print_local_simpset = LocalSimpset.print;
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val get_local_simpset = LocalSimpset.get;
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val put_local_simpset = LocalSimpset.put;
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fun map_local_simpset f ctxt = put_local_simpset (f (get_local_simpset ctxt)) ctxt;
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fun local_simpset_of ctxt =
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  context_ss ctxt (get_local_simpset ctxt) (get_context_ss ctxt);
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(* Jia: added DeltaSimpsetArgs and DeltaSimpset for delta_simpset
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	also added methods to retrieve them. *)
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(* CB: changed "delta simpsets" to context data,
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       moved counter to here, it is no longer a ref *)
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structure DeltaSimpsetArgs =
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struct
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  val name = "Pure/delta_simpset";
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  type T = Thm.thm list * int;  (*the type is thm list * int*)
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  fun init _ = ([], 0);
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  fun print ctxt thms = ();
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end;
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structure DeltaSimpsetData = ProofDataFun(DeltaSimpsetArgs);
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val _ = Context.add_setup [DeltaSimpsetData.init];
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val get_delta_simpset = #1 o DeltaSimpsetData.get;
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wenzelm
parents:
diff changeset
   323
fun put_delta_simpset ss = DeltaSimpsetData.map (fn (_, i) => (ss, i));
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wenzelm
parents:
diff changeset
   324
fun delta_increment ctxt =
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wenzelm
parents:
diff changeset
   325
  let val ctxt' = DeltaSimpsetData.map (fn (ss, i) => (ss, i+1)) ctxt
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wenzelm
parents:
diff changeset
   326
  in (ctxt', #2 (DeltaSimpsetData.get ctxt'))
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wenzelm
parents:
diff changeset
   327
  end;
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wenzelm
parents:
diff changeset
   328
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wenzelm
parents:
diff changeset
   329
(* Jia: added to rename a local thm if necessary *) 
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wenzelm
parents:
diff changeset
   330
local 
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wenzelm
parents:
diff changeset
   331
fun rename_thm' (ctxt,thm) =
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wenzelm
parents:
diff changeset
   332
  let val (new_ctxt, new_id) = delta_increment ctxt
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wenzelm
parents:
diff changeset
   333
      val new_name = "anon_simp_" ^ (string_of_int new_id)
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wenzelm
parents:
diff changeset
   334
  in
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wenzelm
parents:
diff changeset
   335
    (new_ctxt, Thm.name_thm(new_name,thm))
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wenzelm
parents:
diff changeset
   336
end;
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wenzelm
parents:
diff changeset
   337
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   338
in
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wenzelm
parents:
diff changeset
   339
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wenzelm
parents:
diff changeset
   340
fun rename_thm (ctxt,thm) = if (!Proof.call_atp) then rename_thm' (ctxt,thm) else (ctxt, thm);
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wenzelm
parents:
diff changeset
   341
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   342
end
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wenzelm
parents:
diff changeset
   343
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wenzelm
parents:
diff changeset
   344
(* attributes *)
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wenzelm
parents:
diff changeset
   345
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wenzelm
parents:
diff changeset
   346
fun change_global_ss f (thy, th) =
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wenzelm
parents:
diff changeset
   347
  let val r = simpset_ref_of thy
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wenzelm
parents:
diff changeset
   348
  in r := f (! r, [th]); (thy, th) end;
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wenzelm
parents:
diff changeset
   349
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wenzelm
parents:
diff changeset
   350
fun change_local_ss f (ctxt, th) =
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wenzelm
parents:
diff changeset
   351
  let val ss = f (get_local_simpset ctxt, [th])
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wenzelm
parents:
diff changeset
   352
  in (put_local_simpset ss ctxt, th) end;
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wenzelm
parents:
diff changeset
   353
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   354
val simp_add_global = change_global_ss (op addsimps);
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wenzelm
parents:
diff changeset
   355
val simp_del_global = change_global_ss (op delsimps);
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wenzelm
parents:
diff changeset
   356
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   357
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   358
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   359
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   360
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   361
(* Jia: note: when simplifier rules are added to local_simpset, they are also added to delta_simpset in ProofContext.context, but not removed if simp_del_local is called *)
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wenzelm
parents:
diff changeset
   362
fun simp_add_local (ctxt,th) = 
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wenzelm
parents:
diff changeset
   363
    let val delta_ss = get_delta_simpset ctxt
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wenzelm
parents:
diff changeset
   364
	val thm_name = Thm.name_of_thm th
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wenzelm
parents:
diff changeset
   365
        val (ctxt', th') =
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wenzelm
parents:
diff changeset
   366
          if (thm_name = "") then rename_thm (ctxt,th)  else (ctxt, th)
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wenzelm
parents:
diff changeset
   367
	val new_dss = th'::delta_ss
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wenzelm
parents:
diff changeset
   368
	val ctxt'' = put_delta_simpset new_dss ctxt' 
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wenzelm
parents:
diff changeset
   369
    in
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wenzelm
parents:
diff changeset
   370
	change_local_ss (op addsimps) (ctxt'',th)
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wenzelm
parents:
diff changeset
   371
    end;
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wenzelm
parents:
diff changeset
   372
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   373
val simp_del_local = change_local_ss (op delsimps);
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wenzelm
parents:
diff changeset
   374
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   375
val cong_add_global = change_global_ss (op addcongs);
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wenzelm
parents:
diff changeset
   376
val cong_del_global = change_global_ss (op delcongs);
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wenzelm
parents:
diff changeset
   377
val cong_add_local = change_local_ss (op addcongs);
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wenzelm
parents:
diff changeset
   378
val cong_del_local = change_local_ss (op delcongs);
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wenzelm
parents:
diff changeset
   379
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   380
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   381
val simp_tac = generic_simp_tac false (false, false, false);
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wenzelm
parents:
diff changeset
   382
val asm_simp_tac = generic_simp_tac false (false, true, false);
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wenzelm
parents:
diff changeset
   383
val full_simp_tac = generic_simp_tac false (true, false, false);
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wenzelm
parents:
diff changeset
   384
val asm_lr_simp_tac = generic_simp_tac false (true, true, false);
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wenzelm
parents:
diff changeset
   385
val asm_full_simp_tac = generic_simp_tac false (true, true, true);
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wenzelm
parents:
diff changeset
   386
val safe_asm_full_simp_tac = generic_simp_tac true (true, true, true);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   387
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   388
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   389
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   390
(*the abstraction over the proof state delays the dereferencing*)
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wenzelm
parents:
diff changeset
   391
fun          Simp_tac i st =          simp_tac (simpset ()) i st;
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wenzelm
parents:
diff changeset
   392
fun      Asm_simp_tac i st =      asm_simp_tac (simpset ()) i st;
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wenzelm
parents:
diff changeset
   393
fun     Full_simp_tac i st =     full_simp_tac (simpset ()) i st;
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wenzelm
parents:
diff changeset
   394
fun   Asm_lr_simp_tac i st =   asm_lr_simp_tac (simpset ()) i st;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   395
fun Asm_full_simp_tac i st = asm_full_simp_tac (simpset ()) i st;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   396
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   397
val          simplify = simp_thm (false, false, false);
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wenzelm
parents:
diff changeset
   398
val      asm_simplify = simp_thm (false, true, false);
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wenzelm
parents:
diff changeset
   399
val     full_simplify = simp_thm (true, false, false);
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wenzelm
parents:
diff changeset
   400
val   asm_lr_simplify = simp_thm (true, true, false);
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wenzelm
parents:
diff changeset
   401
val asm_full_simplify = simp_thm (true, true, true);
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wenzelm
parents:
diff changeset
   402
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   403
val          rewrite = simp_cterm (false, false, false);
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wenzelm
parents:
diff changeset
   404
val      asm_rewrite = simp_cterm (false, true, false);
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wenzelm
parents:
diff changeset
   405
val     full_rewrite = simp_cterm (true, false, false);
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wenzelm
parents:
diff changeset
   406
val   asm_lr_rewrite = simp_cterm (true, true, false);
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wenzelm
parents:
diff changeset
   407
val asm_full_rewrite = simp_cterm (true, true, true);
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wenzelm
parents:
diff changeset
   408
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   409
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   410
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   411
(** concrete syntax of attributes **)
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wenzelm
parents:
diff changeset
   412
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   413
(* add / del *)
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wenzelm
parents:
diff changeset
   414
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   415
val simpN = "simp";
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wenzelm
parents:
diff changeset
   416
val congN = "cong";
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wenzelm
parents:
diff changeset
   417
val addN = "add";
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wenzelm
parents:
diff changeset
   418
val delN = "del";
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wenzelm
parents:
diff changeset
   419
val onlyN = "only";
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wenzelm
parents:
diff changeset
   420
val no_asmN = "no_asm";
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wenzelm
parents:
diff changeset
   421
val no_asm_useN = "no_asm_use";
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wenzelm
parents:
diff changeset
   422
val no_asm_simpN = "no_asm_simp";
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wenzelm
parents:
diff changeset
   423
val asm_lrN = "asm_lr";
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wenzelm
parents:
diff changeset
   424
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   425
val simp_attr =
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wenzelm
parents:
diff changeset
   426
 (Attrib.add_del_args simp_add_global simp_del_global,
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wenzelm
parents:
diff changeset
   427
  Attrib.add_del_args simp_add_local simp_del_local);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   428
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   429
val cong_attr =
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wenzelm
parents:
diff changeset
   430
 (Attrib.add_del_args cong_add_global cong_del_global,
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   431
  Attrib.add_del_args cong_add_local cong_del_local);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   432
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   433
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   434
(* conversions *)
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wenzelm
parents:
diff changeset
   435
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   436
local
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   437
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   438
fun conv_mode x =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   439
  ((Args.parens (Args.$$$ no_asmN) >> K simplify ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   440
    Args.parens (Args.$$$ no_asm_simpN) >> K asm_simplify ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   441
    Args.parens (Args.$$$ no_asm_useN) >> K full_simplify ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   442
    Scan.succeed asm_full_simplify) |> Scan.lift) x;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   443
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   444
fun simplified_att get args =
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wenzelm
parents:
diff changeset
   445
  Attrib.syntax (conv_mode -- args >> (fn (f, ths) =>
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   446
    Drule.rule_attribute (fn x => f ((if null ths then I else clear_ss) (get x) addsimps ths))));
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   447
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   448
in
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   449
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   450
val simplified_attr =
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wenzelm
parents:
diff changeset
   451
 (simplified_att simpset_of Attrib.global_thmss,
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   452
  simplified_att local_simpset_of Attrib.local_thmss);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   453
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   454
end;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   455
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   456
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   457
(* setup attributes *)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   458
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   459
val _ = Context.add_setup
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   460
 [Attrib.add_attributes
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   461
   [(simpN, simp_attr, "declaration of simplification rule"),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   462
    (congN, cong_attr, "declaration of Simplifier congruence rule"),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   463
    ("simplified", simplified_attr, "simplified rule")]];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   464
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   465
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   466
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   467
(** proof methods **)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   468
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   469
(* simplification *)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   470
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   471
val simp_options =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   472
 (Args.parens (Args.$$$ no_asmN) >> K simp_tac ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   473
  Args.parens (Args.$$$ no_asm_simpN) >> K asm_simp_tac ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   474
  Args.parens (Args.$$$ no_asm_useN) >> K full_simp_tac ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   475
  Args.parens (Args.$$$ asm_lrN) >> K asm_lr_simp_tac ||
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   476
  Scan.succeed asm_full_simp_tac);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   477
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   478
val cong_modifiers =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   479
 [Args.$$$ congN -- Args.colon >> K ((I, cong_add_local):Method.modifier),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   480
  Args.$$$ congN -- Args.add -- Args.colon >> K (I, cong_add_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   481
  Args.$$$ congN -- Args.del -- Args.colon >> K (I, cong_del_local)];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   482
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   483
val simp_modifiers =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   484
 [Args.$$$ simpN -- Args.colon >> K (I, simp_add_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   485
  Args.$$$ simpN -- Args.add -- Args.colon >> K (I, simp_add_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   486
  Args.$$$ simpN -- Args.del -- Args.colon >> K (I, simp_del_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   487
  Args.$$$ simpN -- Args.$$$ onlyN -- Args.colon >> K (map_local_simpset clear_ss, simp_add_local)]
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   488
   @ cong_modifiers;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   489
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   490
val simp_modifiers' =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   491
 [Args.add -- Args.colon >> K (I, simp_add_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   492
  Args.del -- Args.colon >> K (I, simp_del_local),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   493
  Args.$$$ onlyN -- Args.colon >> K (map_local_simpset clear_ss, simp_add_local)]
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   494
   @ cong_modifiers;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   495
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   496
fun simp_args more_mods =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   497
  Method.sectioned_args (Args.bang_facts -- Scan.lift simp_options) (more_mods @ simp_modifiers');
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   498
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   499
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   500
fun simp_method (prems, tac) ctxt = Method.METHOD (fn facts =>
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   501
  ALLGOALS (Method.insert_tac (prems @ facts)) THEN
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   502
    (CHANGED_PROP o ALLGOALS o tac) (local_simpset_of ctxt));
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   503
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   504
fun simp_method' (prems, tac) ctxt = Method.METHOD (fn facts =>
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   505
  HEADGOAL (Method.insert_tac (prems @ facts) THEN'
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   506
      (CHANGED_PROP oo tac) (local_simpset_of ctxt)));
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   507
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   508
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   509
(* setup methods *)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   510
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   511
fun setup_methods more_mods = Method.add_methods
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   512
 [(simpN, simp_args more_mods simp_method', "simplification"),
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   513
  ("simp_all", simp_args more_mods simp_method, "simplification (all goals)")];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   514
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   515
fun method_setup mods = [setup_methods mods];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   516
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   517
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   518
(** easy_setup **)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   519
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   520
fun easy_setup reflect trivs =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   521
  let
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   522
    val trivialities = Drule.reflexive_thm :: trivs;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   523
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   524
    fun unsafe_solver_tac prems = FIRST' [resolve_tac (trivialities @ prems), assume_tac];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   525
    val unsafe_solver = mk_solver "easy unsafe" unsafe_solver_tac;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   526
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   527
    (*no premature instantiation of variables during simplification*)
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   528
    fun safe_solver_tac prems = FIRST' [match_tac (trivialities @ prems), eq_assume_tac];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   529
    val safe_solver = mk_solver "easy safe" safe_solver_tac;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   530
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   531
    fun mk_eq thm =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   532
      if Logic.is_equals (Thm.concl_of thm) then [thm]
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   533
      else [thm RS reflect] handle THM _ => [];
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   534
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   535
    fun mksimps thm = mk_eq (Drule.forall_elim_vars (#maxidx (Thm.rep_thm thm) + 1) thm);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   536
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   537
    fun init_ss thy =
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   538
      (simpset_ref_of thy :=
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   539
        empty_ss setsubgoaler asm_simp_tac
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   540
        setSSolver safe_solver
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   541
        setSolver unsafe_solver
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   542
        setmksimps mksimps; thy);
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   543
  in method_setup [] @ [init_ss] end;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   544
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   545
end;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   546
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   547
structure BasicSimplifier: BASIC_SIMPLIFIER = Simplifier;
85f4b0f81f62 moved here from Provers;
wenzelm
parents:
diff changeset
   548
open BasicSimplifier;