src/Pure/raw_simplifier.ML
author nipkow
Tue, 12 May 2015 08:48:11 +0200
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child 60324 f83406084507
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(*  Title:      Pure/raw_simplifier.ML
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    Author:     Tobias Nipkow and Stefan Berghofer, TU Muenchen
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Higher-order Simplification.
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*)
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infix 4
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  addsimps delsimps addsimprocs delsimprocs
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  setloop addloop delloop
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  setSSolver addSSolver setSolver addSolver;
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signature BASIC_RAW_SIMPLIFIER =
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sig
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  val simp_depth_limit: int Config.T
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  val simp_trace_depth_limit: int Config.T
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  val simp_debug: bool Config.T
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  val simp_trace: bool Config.T
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  type cong_name = bool * string
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  type rrule
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  val mk_rrules: Proof.context -> thm list -> rrule list
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  val eq_rrule: rrule * rrule -> bool
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  type proc
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  type solver
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  val mk_solver: string -> (Proof.context -> int -> tactic) -> solver
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  type simpset
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  val empty_ss: simpset
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  val merge_ss: simpset * simpset -> simpset
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  val dest_ss: simpset ->
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   {simps: (string * thm) list,
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    procs: (string * cterm list) list,
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    congs: (cong_name * thm) list,
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    weak_congs: cong_name list,
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    loopers: string list,
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    unsafe_solvers: string list,
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    safe_solvers: string list}
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  type simproc
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  val eq_simproc: simproc * simproc -> bool
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  val transform_simproc: morphism -> simproc -> simproc
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  val make_simproc: {name: string, lhss: cterm list,
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    proc: morphism -> Proof.context -> cterm -> thm option, identifier: thm list} -> simproc
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  val mk_simproc: string -> cterm list -> (Proof.context -> term -> thm option) -> simproc
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  val simpset_of: Proof.context -> simpset
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  val put_simpset: simpset -> Proof.context -> Proof.context
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  val simpset_map: Proof.context -> (Proof.context -> Proof.context) -> simpset -> simpset
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  val map_theory_simpset: (Proof.context -> Proof.context) -> theory -> theory
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  val empty_simpset: Proof.context -> Proof.context
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  val clear_simpset: Proof.context -> Proof.context
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  val addsimps: Proof.context * thm list -> Proof.context
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  val delsimps: Proof.context * thm list -> Proof.context
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  val addsimprocs: Proof.context * simproc list -> Proof.context
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  val delsimprocs: Proof.context * simproc list -> Proof.context
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  val setloop: Proof.context * (Proof.context -> int -> tactic) -> Proof.context
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  val addloop: Proof.context * (string * (Proof.context -> int -> tactic)) -> Proof.context
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  val delloop: Proof.context * string -> Proof.context
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  val setSSolver: Proof.context * solver -> Proof.context
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  val addSSolver: Proof.context * solver -> Proof.context
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  val setSolver: Proof.context * solver -> Proof.context
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  val addSolver: Proof.context * solver -> Proof.context
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  val rewrite_rule: Proof.context -> thm list -> thm -> thm
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  val rewrite_goals_rule: Proof.context -> thm list -> thm -> thm
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  val rewrite_goals_tac: Proof.context -> thm list -> tactic
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  val rewrite_goal_tac: Proof.context -> thm list -> int -> tactic
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  val prune_params_tac: Proof.context -> tactic
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  val fold_rule: Proof.context -> thm list -> thm -> thm
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  val fold_goals_tac: Proof.context -> thm list -> tactic
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  val norm_hhf: Proof.context -> thm -> thm
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  val norm_hhf_protect: Proof.context -> thm -> thm
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end;
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signature RAW_SIMPLIFIER =
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sig
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  include BASIC_RAW_SIMPLIFIER
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  exception SIMPLIFIER of string * thm list
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  type trace_ops
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  val set_trace_ops: trace_ops -> theory -> theory
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  val internal_ss: simpset ->
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   {congs: (cong_name * thm) list * cong_name list,
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    procs: proc Net.net,
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    mk_rews:
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     {mk: Proof.context -> thm -> thm list,
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      mk_cong: Proof.context -> thm -> thm,
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      mk_sym: Proof.context -> thm -> thm option,
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      mk_eq_True: Proof.context -> thm -> thm option,
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      reorient: Proof.context -> term list -> term -> term -> bool},
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    termless: term * term -> bool,
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    subgoal_tac: Proof.context -> int -> tactic,
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    loop_tacs: (string * (Proof.context -> int -> tactic)) list,
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    solvers: solver list * solver list}
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  val map_ss: (Proof.context -> Proof.context) -> Context.generic -> Context.generic
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  val prems_of: Proof.context -> thm list
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  val add_simp: thm -> Proof.context -> Proof.context
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  val del_simp: thm -> Proof.context -> Proof.context
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  val add_eqcong: thm -> Proof.context -> Proof.context
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  val del_eqcong: thm -> Proof.context -> Proof.context
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  val add_cong: thm -> Proof.context -> Proof.context
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  val del_cong: thm -> Proof.context -> Proof.context
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  val mksimps: Proof.context -> thm -> thm list
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  val set_mksimps: (Proof.context -> thm -> thm list) -> Proof.context -> Proof.context
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  val set_mkcong: (Proof.context -> thm -> thm) -> Proof.context -> Proof.context
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  val set_mksym: (Proof.context -> thm -> thm option) -> Proof.context -> Proof.context
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  val set_mkeqTrue: (Proof.context -> thm -> thm option) -> Proof.context -> Proof.context
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  val set_termless: (term * term -> bool) -> Proof.context -> Proof.context
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  val set_subgoaler: (Proof.context -> int -> tactic) -> Proof.context -> Proof.context
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  val solver: Proof.context -> solver -> int -> tactic
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  val simp_depth_limit_raw: Config.raw
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  val default_mk_sym: Proof.context -> thm -> thm option
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  val simproc_global_i: theory -> string -> term list ->
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    (Proof.context -> term -> thm option) -> simproc
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  val simproc_global: theory -> string -> string list ->
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    (Proof.context -> term -> thm option) -> simproc
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  val simp_trace_depth_limit_raw: Config.raw
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  val simp_trace_raw: Config.raw
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  val simp_debug_raw: Config.raw
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  val add_prems: thm list -> Proof.context -> Proof.context
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  val set_reorient: (Proof.context -> term list -> term -> term -> bool) ->
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    Proof.context -> Proof.context
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  val set_solvers: solver list -> Proof.context -> Proof.context
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  val rewrite_cterm: bool * bool * bool ->
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    (Proof.context -> thm -> thm option) -> Proof.context -> conv
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  val rewrite_term: theory -> thm list -> (term -> term option) list -> term -> term
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  val rewrite_thm: bool * bool * bool ->
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    (Proof.context -> thm -> thm option) -> Proof.context -> thm -> thm
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  val generic_rewrite_goal_tac: bool * bool * bool ->
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    (Proof.context -> tactic) -> Proof.context -> int -> tactic
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  val rewrite: Proof.context -> bool -> thm list -> conv
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end;
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structure Raw_Simplifier: RAW_SIMPLIFIER =
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struct
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(** datatype simpset **)
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(* congruence rules *)
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type cong_name = bool * string;
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fun cong_name (Const (a, _)) = SOME (true, a)
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  | cong_name (Free (a, _)) = SOME (false, a)
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  | cong_name _ = NONE;
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(* rewrite rules *)
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type rrule =
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 {thm: thm,         (*the rewrite rule*)
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  name: string,     (*name of theorem from which rewrite rule was extracted*)
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  lhs: term,        (*the left-hand side*)
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  elhs: cterm,      (*the eta-contracted lhs*)
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  extra: bool,      (*extra variables outside of elhs*)
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  fo: bool,         (*use first-order matching*)
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  perm: bool};      (*the rewrite rule is permutative*)
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(*
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Remarks:
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  - elhs is used for matching,
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    lhs only for preservation of bound variable names;
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  - fo is set iff
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    either elhs is first-order (no Var is applied),
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      in which case fo-matching is complete,
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    or elhs is not a pattern,
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      in which case there is nothing better to do;
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*)
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fun eq_rrule ({thm = thm1, ...}: rrule, {thm = thm2, ...}: rrule) =
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  Thm.eq_thm_prop (thm1, thm2);
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(* FIXME: it seems that the conditions on extra variables are too liberal if
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prems are nonempty: does solving the prems really guarantee instantiation of
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all its Vars? Better: a dynamic check each time a rule is applied.
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*)
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fun rewrite_rule_extra_vars prems elhs erhs =
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  let
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    val elhss = elhs :: prems;
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    val tvars = fold Term.add_tvars elhss [];
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    val vars = fold Term.add_vars elhss [];
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  in
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    erhs |> Term.exists_type (Term.exists_subtype
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      (fn TVar v => not (member (op =) tvars v) | _ => false)) orelse
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    erhs |> Term.exists_subterm
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      (fn Var v => not (member (op =) vars v) | _ => false)
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  end;
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fun rrule_extra_vars elhs thm =
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  rewrite_rule_extra_vars [] (Thm.term_of elhs) (Thm.full_prop_of thm);
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fun mk_rrule2 {thm, name, lhs, elhs, perm} =
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  let
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    val t = Thm.term_of elhs;
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    val fo = Pattern.first_order t orelse not (Pattern.pattern t);
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    val extra = rrule_extra_vars elhs thm;
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  in {thm = thm, name = name, lhs = lhs, elhs = elhs, extra = extra, fo = fo, perm = perm} end;
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(*simple test for looping rewrite rules and stupid orientations*)
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fun default_reorient ctxt prems lhs rhs =
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  rewrite_rule_extra_vars prems lhs rhs
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    orelse
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  is_Var (head_of lhs)
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    orelse
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(* turns t = x around, which causes a headache if x is a local variable -
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   usually it is very useful :-(
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  is_Free rhs andalso not(is_Free lhs) andalso not(Logic.occs(rhs,lhs))
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  andalso not(exists_subterm is_Var lhs)
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    orelse
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*)
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  exists (fn t => Logic.occs (lhs, t)) (rhs :: prems)
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    orelse
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  null prems andalso Pattern.matches (Proof_Context.theory_of ctxt) (lhs, rhs)
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    (*the condition "null prems" is necessary because conditional rewrites
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      with extra variables in the conditions may terminate although
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      the rhs is an instance of the lhs; example: ?m < ?n ==> f(?n) == f(?m)*)
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    orelse
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  is_Const lhs andalso not (is_Const rhs);
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(* simplification procedures *)
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datatype proc =
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  Proc of
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   {name: string,
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    lhs: cterm,
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    proc: Proof.context -> cterm -> thm option,
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    id: stamp * thm list};
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fun eq_procid ((s1: stamp, ths1: thm list), (s2, ths2)) =
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  s1 = s2 andalso eq_list Thm.eq_thm (ths1, ths2);
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fun eq_proc (Proc {id = id1, ...}, Proc {id = id2, ...}) = eq_procid (id1, id2);
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(* solvers *)
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datatype solver =
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  Solver of
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   {name: string,
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    solver: Proof.context -> int -> tactic,
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    id: stamp};
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fun mk_solver name solver = Solver {name = name, solver = solver, id = stamp ()};
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fun solver_name (Solver {name, ...}) = name;
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fun solver ctxt (Solver {solver = tac, ...}) = tac ctxt;
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fun eq_solver (Solver {id = id1, ...}, Solver {id = id2, ...}) = (id1 = id2);
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(* simplification sets *)
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(*A simpset contains data required during conversion:
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    rules: discrimination net of rewrite rules;
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    prems: current premises;
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    depth: simp_depth and exceeded flag;
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    congs: association list of congruence rules and
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           a list of `weak' congruence constants.
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           A congruence is `weak' if it avoids normalization of some argument.
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    procs: discrimination net of simplification procedures
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      (functions that prove rewrite rules on the fly);
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    mk_rews:
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      mk: turn simplification thms into rewrite rules;
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      mk_cong: prepare congruence rules;
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      mk_sym: turn == around;
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      mk_eq_True: turn P into P == True;
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    termless: relation for ordered rewriting;*)
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datatype simpset =
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  Simpset of
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   {rules: rrule Net.net,
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    prems: thm list,
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    depth: int * bool Unsynchronized.ref} *
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   {congs: (cong_name * thm) list * cong_name list,
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    procs: proc Net.net,
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    mk_rews:
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     {mk: Proof.context -> thm -> thm list,
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      mk_cong: Proof.context -> thm -> thm,
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      mk_sym: Proof.context -> thm -> thm option,
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      mk_eq_True: Proof.context -> thm -> thm option,
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      reorient: Proof.context -> term list -> term -> term -> bool},
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    termless: term * term -> bool,
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    subgoal_tac: Proof.context -> int -> tactic,
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    loop_tacs: (string * (Proof.context -> int -> tactic)) list,
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    solvers: solver list * solver list};
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fun internal_ss (Simpset (_, ss2)) = ss2;
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fun make_ss1 (rules, prems, depth) = {rules = rules, prems = prems, depth = depth};
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fun map_ss1 f {rules, prems, depth} = make_ss1 (f (rules, prems, depth));
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fun make_ss2 (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =
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  {congs = congs, procs = procs, mk_rews = mk_rews, termless = termless,
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    subgoal_tac = subgoal_tac, loop_tacs = loop_tacs, solvers = solvers};
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fun map_ss2 f {congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers} =
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  make_ss2 (f (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers));
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fun make_simpset (args1, args2) = Simpset (make_ss1 args1, make_ss2 args2);
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fun dest_ss (Simpset ({rules, ...}, {congs, procs, loop_tacs, solvers, ...})) =
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 {simps = Net.entries rules
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    |> map (fn {name, thm, ...} => (name, thm)),
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  procs = Net.entries procs
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    |> map (fn Proc {name, lhs, id, ...} => ((name, lhs), id))
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    |> partition_eq (eq_snd eq_procid)
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    |> map (fn ps => (fst (fst (hd ps)), map (snd o fst) ps)),
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  congs = #1 congs,
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  weak_congs = #2 congs,
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  loopers = map fst loop_tacs,
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  unsafe_solvers = map solver_name (#1 solvers),
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  safe_solvers = map solver_name (#2 solvers)};
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(* empty *)
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fun init_ss depth mk_rews termless subgoal_tac solvers =
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  make_simpset ((Net.empty, [], depth),
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    (([], []), Net.empty, mk_rews, termless, subgoal_tac, [], solvers));
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fun default_mk_sym _ th = SOME (th RS Drule.symmetric_thm);
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val empty_ss =
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  init_ss (0, Unsynchronized.ref false)
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    {mk = fn _ => fn th => if can Logic.dest_equals (Thm.concl_of th) then [th] else [],
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      mk_cong = K I,
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      mk_sym = default_mk_sym,
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      mk_eq_True = K (K NONE),
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      reorient = default_reorient}
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    Term_Ord.termless (K (K no_tac)) ([], []);
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(* merge *)  (*NOTE: ignores some fields of 2nd simpset*)
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fun merge_ss (ss1, ss2) =
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  if pointer_eq (ss1, ss2) then ss1
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  else
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    let
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      val Simpset ({rules = rules1, prems = prems1, depth = depth1},
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       {congs = (congs1, weak1), procs = procs1, mk_rews, termless, subgoal_tac,
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        loop_tacs = loop_tacs1, solvers = (unsafe_solvers1, solvers1)}) = ss1;
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      val Simpset ({rules = rules2, prems = prems2, depth = depth2},
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       {congs = (congs2, weak2), procs = procs2, mk_rews = _, termless = _, subgoal_tac = _,
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        loop_tacs = loop_tacs2, solvers = (unsafe_solvers2, solvers2)}) = ss2;
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      val rules' = Net.merge eq_rrule (rules1, rules2);
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      val prems' = Thm.merge_thms (prems1, prems2);
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      val depth' = if #1 depth1 < #1 depth2 then depth2 else depth1;
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      val congs' = merge (Thm.eq_thm_prop o apply2 #2) (congs1, congs2);
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      val weak' = merge (op =) (weak1, weak2);
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      val procs' = Net.merge eq_proc (procs1, procs2);
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      val loop_tacs' = AList.merge (op =) (K true) (loop_tacs1, loop_tacs2);
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      val unsafe_solvers' = merge eq_solver (unsafe_solvers1, unsafe_solvers2);
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      val solvers' = merge eq_solver (solvers1, solvers2);
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    in
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      make_simpset ((rules', prems', depth'), ((congs', weak'), procs',
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        mk_rews, termless, subgoal_tac, loop_tacs', (unsafe_solvers', solvers')))
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    end;
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(** context data **)
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structure Simpset = Generic_Data
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(
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  type T = simpset;
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  val empty = empty_ss;
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  val extend = I;
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  val merge = merge_ss;
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);
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val simpset_of = Simpset.get o Context.Proof;
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fun map_simpset f = Context.proof_map (Simpset.map f);
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fun map_simpset1 f = map_simpset (fn Simpset (ss1, ss2) => Simpset (map_ss1 f ss1, ss2));
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fun map_simpset2 f = map_simpset (fn Simpset (ss1, ss2) => Simpset (ss1, map_ss2 f ss2));
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fun simpset_map ctxt f ss = ctxt |> map_simpset (K ss) |> f |> Context.Proof |> Simpset.get;
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fun put_simpset ss = map_simpset (K ss);
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val empty_simpset = put_simpset empty_ss;
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fun map_theory_simpset f thy =
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  let
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    val ctxt' = f (Proof_Context.init_global thy);
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    val thy' = Proof_Context.theory_of ctxt';
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  in Context.theory_map (Simpset.map (K (simpset_of ctxt'))) thy' end;
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fun map_ss f = Context.mapping (map_theory_simpset (f o Context_Position.not_really)) f;
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val clear_simpset =
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  map_simpset (fn Simpset ({depth, ...}, {mk_rews, termless, subgoal_tac, solvers, ...}) =>
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    init_ss depth mk_rews termless subgoal_tac solvers);
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(* simp depth *)
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val simp_depth_limit_raw = Config.declare ("simp_depth_limit", @{here}) (K (Config.Int 100));
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val simp_depth_limit = Config.int simp_depth_limit_raw;
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val simp_trace_depth_limit_raw =
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  Config.declare ("simp_trace_depth_limit", @{here}) (fn _ => Config.Int 1);
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val simp_trace_depth_limit = Config.int simp_trace_depth_limit_raw;
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fun inc_simp_depth ctxt =
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  ctxt |> map_simpset1 (fn (rules, prems, (depth, exceeded)) =>
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   404
    (rules, prems,
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   405
      (depth + 1,
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   406
        if depth = Config.get ctxt simp_trace_depth_limit
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   407
        then Unsynchronized.ref false else exceeded)));
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   408
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   409
fun simp_depth ctxt =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   410
  let val Simpset ({depth = (depth, _), ...}, _) = simpset_of ctxt
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   411
  in depth end;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   412
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   413
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   414
(* diagnostics *)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   415
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   416
exception SIMPLIFIER of string * thm list;
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   417
56438
7f6b2634d853 more source positions;
wenzelm
parents: 56245
diff changeset
   418
val simp_debug_raw = Config.declare ("simp_debug", @{here}) (K (Config.Bool false));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   419
val simp_debug = Config.bool simp_debug_raw;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   420
58859
d5ff8b782b29 eliminated former Proof General preferences;
wenzelm
parents: 58836
diff changeset
   421
val simp_trace_raw = Config.declare ("simp_trace", @{here}) (fn _ => Config.Bool false);
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   422
val simp_trace = Config.bool simp_trace_raw;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   423
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   424
fun cond_warning ctxt msg =
57859
29e728588163 more careful treatment of context visibility for rule declarations (see also 39d9c7f175e0, e639d91d9073) -- avoid duplicate warnings;
wenzelm
parents: 56438
diff changeset
   425
  if Context_Position.is_really_visible ctxt then warning (msg ()) else ();
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   426
55031
wenzelm
parents: 55028
diff changeset
   427
fun cond_tracing' ctxt flag msg =
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   428
  if Config.get ctxt flag then
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   429
    let
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   430
      val Simpset ({depth = (depth, exceeded), ...}, _) = simpset_of ctxt;
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   431
      val depth_limit = Config.get ctxt simp_trace_depth_limit;
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   432
    in
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   433
      if depth > depth_limit then
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   434
        if ! exceeded then () else (tracing "simp_trace_depth_limit exceeded!"; exceeded := true)
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   435
      else (tracing (enclose "[" "]" (string_of_int depth) ^ msg ()); exceeded := false)
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   436
    end
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   437
  else ();
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   438
55031
wenzelm
parents: 55028
diff changeset
   439
fun cond_tracing ctxt = cond_tracing' ctxt simp_trace;
wenzelm
parents: 55028
diff changeset
   440
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   441
fun print_term ctxt s t =
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   442
  s ^ "\n" ^ Syntax.string_of_term ctxt t;
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   443
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   444
fun print_thm ctxt s (name, th) =
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   445
  print_term ctxt (if name = "" then s else s ^ " " ^ quote name ^ ":") (Thm.full_prop_of th);
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   446
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   447
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   448
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   449
(** simpset operations **)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   450
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   451
(* prems *)
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   452
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   453
fun prems_of ctxt =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   454
  let val Simpset ({prems, ...}, _) = simpset_of ctxt in prems end;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   455
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   456
fun add_prems ths =
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   457
  map_simpset1 (fn (rules, prems, depth) => (rules, ths @ prems, depth));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   458
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   459
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   460
(* maintain simp rules *)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   461
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   462
fun del_rrule (rrule as {thm, elhs, ...}) ctxt =
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   463
  ctxt |> map_simpset1 (fn (rules, prems, depth) =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   464
    (Net.delete_term eq_rrule (Thm.term_of elhs, rrule) rules, prems, depth))
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   465
  handle Net.DELETE =>
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   466
    (cond_warning ctxt (fn () => print_thm ctxt "Rewrite rule not in simpset:" ("", thm)); ctxt);
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   467
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   468
fun insert_rrule (rrule as {thm, name, ...}) ctxt =
55031
wenzelm
parents: 55028
diff changeset
   469
 (cond_tracing ctxt (fn () => print_thm ctxt "Adding rewrite rule" (name, thm));
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   470
  ctxt |> map_simpset1 (fn (rules, prems, depth) =>
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   471
    let
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   472
      val rrule2 as {elhs, ...} = mk_rrule2 rrule;
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   473
      val rules' = Net.insert_term eq_rrule (Thm.term_of elhs, rrule2) rules;
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
   474
    in (rules', prems, depth) end)
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   475
  handle Net.INSERT =>
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   476
    (cond_warning ctxt (fn () => print_thm ctxt "Ignoring duplicate rewrite rule:" ("", thm));
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   477
      ctxt));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   478
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   479
local
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   480
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   481
fun vperm (Var _, Var _) = true
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   482
  | vperm (Abs (_, _, s), Abs (_, _, t)) = vperm (s, t)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   483
  | vperm (t1 $ t2, u1 $ u2) = vperm (t1, u1) andalso vperm (t2, u2)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   484
  | vperm (t, u) = (t = u);
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   485
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   486
fun var_perm (t, u) =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   487
  vperm (t, u) andalso eq_set (op =) (Term.add_vars t [], Term.add_vars u []);
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   488
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   489
in
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   490
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   491
fun decomp_simp thm =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   492
  let
26626
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   493
    val prop = Thm.prop_of thm;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   494
    val prems = Logic.strip_imp_prems prop;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   495
    val concl = Drule.strip_imp_concl (Thm.cprop_of thm);
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   496
    val (lhs, rhs) = Thm.dest_equals concl handle TERM _ =>
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   497
      raise SIMPLIFIER ("Rewrite rule not a meta-equality", [thm]);
20579
4dc799edef89 Thm.dest_arg;
wenzelm
parents: 20546
diff changeset
   498
    val elhs = Thm.dest_arg (Thm.cprop_of (Thm.eta_conversion lhs));
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   499
    val erhs = Envir.eta_contract (Thm.term_of rhs);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   500
    val perm =
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   501
      var_perm (Thm.term_of elhs, erhs) andalso
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   502
      not (Thm.term_of elhs aconv erhs) andalso
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   503
      not (is_Var (Thm.term_of elhs));
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   504
  in (prems, Thm.term_of lhs, elhs, Thm.term_of rhs, perm) end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   505
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   506
end;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   507
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   508
fun decomp_simp' thm =
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   509
  let val (_, lhs, _, rhs, _) = decomp_simp thm in
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   510
    if Thm.nprems_of thm > 0 then raise SIMPLIFIER ("Bad conditional rewrite rule", [thm])
12979
4c76bce4ce39 decomp_simp': use lhs instead of elhs (preserves more bound variable names);
wenzelm
parents: 12783
diff changeset
   511
    else (lhs, rhs)
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   512
  end;
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   513
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   514
fun mk_eq_True ctxt (thm, name) =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   515
  let val Simpset (_, {mk_rews = {mk_eq_True, ...}, ...}) = simpset_of ctxt in
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   516
    (case mk_eq_True ctxt thm of
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   517
      NONE => []
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   518
    | SOME eq_True =>
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   519
        let val (_, lhs, elhs, _, _) = decomp_simp eq_True;
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   520
        in [{thm = eq_True, name = name, lhs = lhs, elhs = elhs, perm = false}] end)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   521
  end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   522
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   523
(*create the rewrite rule and possibly also the eq_True variant,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   524
  in case there are extra vars on the rhs*)
52082
wenzelm
parents: 52037
diff changeset
   525
fun rrule_eq_True ctxt thm name lhs elhs rhs thm2 =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   526
  let val rrule = {thm = thm, name = name, lhs = lhs, elhs = elhs, perm = false} in
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   527
    if rewrite_rule_extra_vars [] lhs rhs then
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   528
      mk_eq_True ctxt (thm2, name) @ [rrule]
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   529
    else [rrule]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   530
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   531
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   532
fun mk_rrule ctxt (thm, name) =
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   533
  let val (prems, lhs, elhs, rhs, perm) = decomp_simp thm in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   534
    if perm then [{thm = thm, name = name, lhs = lhs, elhs = elhs, perm = true}]
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   535
    else
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   536
      (*weak test for loops*)
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   537
      if rewrite_rule_extra_vars prems lhs rhs orelse is_Var (Thm.term_of elhs)
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   538
      then mk_eq_True ctxt (thm, name)
52082
wenzelm
parents: 52037
diff changeset
   539
      else rrule_eq_True ctxt thm name lhs elhs rhs thm
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   540
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   541
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   542
fun orient_rrule ctxt (thm, name) =
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   543
  let
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   544
    val (prems, lhs, elhs, rhs, perm) = decomp_simp thm;
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   545
    val Simpset (_, {mk_rews = {reorient, mk_sym, ...}, ...}) = simpset_of ctxt;
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   546
  in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   547
    if perm then [{thm = thm, name = name, lhs = lhs, elhs = elhs, perm = true}]
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   548
    else if reorient ctxt prems lhs rhs then
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   549
      if reorient ctxt prems rhs lhs
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   550
      then mk_eq_True ctxt (thm, name)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   551
      else
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   552
        (case mk_sym ctxt thm of
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   553
          NONE => []
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   554
        | SOME thm' =>
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   555
            let val (_, lhs', elhs', rhs', _) = decomp_simp thm'
52082
wenzelm
parents: 52037
diff changeset
   556
            in rrule_eq_True ctxt thm' name lhs' elhs' rhs' thm end)
wenzelm
parents: 52037
diff changeset
   557
    else rrule_eq_True ctxt thm name lhs elhs rhs thm
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   558
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   559
54982
wenzelm
parents: 54895
diff changeset
   560
fun extract_rews ctxt thms =
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   561
  let val Simpset (_, {mk_rews = {mk, ...}, ...}) = simpset_of ctxt
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   562
  in maps (fn thm => map (rpair (Thm.get_name_hint thm)) (mk ctxt thm)) thms end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   563
54982
wenzelm
parents: 54895
diff changeset
   564
fun extract_safe_rrules ctxt thm =
wenzelm
parents: 54895
diff changeset
   565
  maps (orient_rrule ctxt) (extract_rews ctxt [thm]);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   566
55316
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   567
fun mk_rrules ctxt thms =
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   568
  let
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   569
    val rews = extract_rews ctxt thms
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   570
    val raw_rrules = flat (map (mk_rrule ctxt) rews)
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   571
  in map mk_rrule2 raw_rrules end
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   572
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   573
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   574
(* add/del rules explicitly *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   575
54982
wenzelm
parents: 54895
diff changeset
   576
fun comb_simps ctxt comb mk_rrule thms =
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   577
  let
54982
wenzelm
parents: 54895
diff changeset
   578
    val rews = extract_rews ctxt thms;
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   579
  in fold (fold comb o mk_rrule) rews ctxt end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   580
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   581
fun ctxt addsimps thms =
54982
wenzelm
parents: 54895
diff changeset
   582
  comb_simps ctxt insert_rrule (mk_rrule ctxt) thms;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   583
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   584
fun ctxt delsimps thms =
54982
wenzelm
parents: 54895
diff changeset
   585
  comb_simps ctxt del_rrule (map mk_rrule2 o mk_rrule ctxt) thms;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   586
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   587
fun add_simp thm ctxt = ctxt addsimps [thm];
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   588
fun del_simp thm ctxt = ctxt delsimps [thm];
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   589
57859
29e728588163 more careful treatment of context visibility for rule declarations (see also 39d9c7f175e0, e639d91d9073) -- avoid duplicate warnings;
wenzelm
parents: 56438
diff changeset
   590
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   591
(* congs *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   592
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   593
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   594
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   595
fun is_full_cong_prems [] [] = true
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   596
  | is_full_cong_prems [] _ = false
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   597
  | is_full_cong_prems (p :: prems) varpairs =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   598
      (case Logic.strip_assums_concl p of
56245
84fc7dfa3cd4 more qualified names;
wenzelm
parents: 55635
diff changeset
   599
        Const ("Pure.eq", _) $ lhs $ rhs =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   600
          let val (x, xs) = strip_comb lhs and (y, ys) = strip_comb rhs in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   601
            is_Var x andalso forall is_Bound xs andalso
20972
db0425645cc7 abandoned findrep
haftmann
parents: 20905
diff changeset
   602
            not (has_duplicates (op =) xs) andalso xs = ys andalso
20671
2aa8269a868e member (op =);
wenzelm
parents: 20579
diff changeset
   603
            member (op =) varpairs (x, y) andalso
19303
7da7e96bd74d gen_eq_set, remove (op =);
wenzelm
parents: 19142
diff changeset
   604
            is_full_cong_prems prems (remove (op =) (x, y) varpairs)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   605
          end
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   606
      | _ => false);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   607
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   608
fun is_full_cong thm =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   609
  let
43597
b4a093e755db tuned signature;
wenzelm
parents: 43596
diff changeset
   610
    val prems = Thm.prems_of thm and concl = Thm.concl_of thm;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   611
    val (lhs, rhs) = Logic.dest_equals concl;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   612
    val (f, xs) = strip_comb lhs and (g, ys) = strip_comb rhs;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   613
  in
20972
db0425645cc7 abandoned findrep
haftmann
parents: 20905
diff changeset
   614
    f = g andalso not (has_duplicates (op =) (xs @ ys)) andalso length xs = length ys andalso
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   615
    is_full_cong_prems prems (xs ~~ ys)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   616
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   617
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   618
fun mk_cong ctxt =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   619
  let val Simpset (_, {mk_rews = {mk_cong = f, ...}, ...}) = simpset_of ctxt
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   620
  in f ctxt end;
45620
f2a587696afb modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45405
diff changeset
   621
f2a587696afb modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45405
diff changeset
   622
in
f2a587696afb modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45405
diff changeset
   623
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   624
fun add_eqcong thm ctxt = ctxt |> map_simpset2
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   625
  (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   626
    let
45621
wenzelm
parents: 45620
diff changeset
   627
      val (lhs, _) = Logic.dest_equals (Thm.concl_of thm)
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   628
        handle TERM _ => raise SIMPLIFIER ("Congruence not a meta-equality", [thm]);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   629
    (*val lhs = Envir.eta_contract lhs;*)
45621
wenzelm
parents: 45620
diff changeset
   630
      val a = the (cong_name (head_of lhs)) handle Option.Option =>
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   631
        raise SIMPLIFIER ("Congruence must start with a constant or free variable", [thm]);
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   632
      val (xs, weak) = congs;
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   633
      val xs' = AList.update (op =) (a, thm) xs;
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   634
      val weak' = if is_full_cong thm then weak else a :: weak;
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   635
    in ((xs', weak'), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   636
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   637
fun del_eqcong thm ctxt = ctxt |> map_simpset2
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   638
  (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   639
    let
45621
wenzelm
parents: 45620
diff changeset
   640
      val (lhs, _) = Logic.dest_equals (Thm.concl_of thm)
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   641
        handle TERM _ => raise SIMPLIFIER ("Congruence not a meta-equality", [thm]);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   642
    (*val lhs = Envir.eta_contract lhs;*)
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
   643
      val a = the (cong_name (head_of lhs)) handle Option.Option =>
54997
811c35e81ac5 tuned signature;
wenzelm
parents: 54984
diff changeset
   644
        raise SIMPLIFIER ("Congruence must start with a constant", [thm]);
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   645
      val (xs, _) = congs;
51590
c52891242de2 more formal cong_name;
wenzelm
parents: 49660
diff changeset
   646
      val xs' = filter_out (fn (x : cong_name, _) => x = a) xs;
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   647
      val weak' = xs' |> map_filter (fn (a, thm) =>
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   648
        if is_full_cong thm then NONE else SOME a);
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   649
    in ((xs', weak'), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   650
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   651
fun add_cong thm ctxt = add_eqcong (mk_cong ctxt thm) ctxt;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   652
fun del_cong thm ctxt = del_eqcong (mk_cong ctxt thm) ctxt;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   653
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   654
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   655
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   656
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   657
(* simprocs *)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   658
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   659
datatype simproc =
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   660
  Simproc of
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   661
    {name: string,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   662
     lhss: cterm list,
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   663
     proc: morphism -> Proof.context -> cterm -> thm option,
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   664
     id: stamp * thm list};
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   665
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   666
fun eq_simproc (Simproc {id = id1, ...}, Simproc {id = id2, ...}) = eq_procid (id1, id2);
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   667
45290
f599ac41e7f5 tuned signature -- refined terminology;
wenzelm
parents: 44058
diff changeset
   668
fun transform_simproc phi (Simproc {name, lhss, proc, id = (s, ths)}) =
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   669
  Simproc
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   670
   {name = name,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   671
    lhss = map (Morphism.cterm phi) lhss,
22669
62857ad97cca Morphism.transform/form;
wenzelm
parents: 22360
diff changeset
   672
    proc = Morphism.transform phi proc,
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   673
    id = (s, Morphism.fact phi ths)};
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   674
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   675
fun make_simproc {name, lhss, proc, identifier} =
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   676
  Simproc {name = name, lhss = lhss, proc = proc, id = (stamp (), identifier)};
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   677
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   678
fun mk_simproc name lhss proc =
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   679
  make_simproc {name = name, lhss = lhss, proc = fn _ => fn ctxt => fn ct =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   680
    proc ctxt (Thm.term_of ct), identifier = []};
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   681
35845
e5980f0ad025 renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents: 35408
diff changeset
   682
(* FIXME avoid global thy and Logic.varify_global *)
59621
291934bac95e Thm.cterm_of and Thm.ctyp_of operate on local context;
wenzelm
parents: 59586
diff changeset
   683
fun simproc_global_i thy name = mk_simproc name o map (Thm.global_cterm_of thy o Logic.varify_global);
38715
6513ea67d95d renamed Simplifier.simproc(_i) to Simplifier.simproc_global(_i) to emphasize that this is not the real thing;
wenzelm
parents: 36944
diff changeset
   684
fun simproc_global thy name = simproc_global_i thy name o map (Syntax.read_term_global thy);
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   685
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   686
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   687
local
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   688
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   689
fun add_proc (proc as Proc {name, lhs, ...}) ctxt =
55031
wenzelm
parents: 55028
diff changeset
   690
 (cond_tracing ctxt (fn () =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   691
    print_term ctxt ("Adding simplification procedure " ^ quote name ^ " for") (Thm.term_of lhs));
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   692
  ctxt |> map_simpset2
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   693
    (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   694
      (congs, Net.insert_term eq_proc (Thm.term_of lhs, proc) procs,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   695
        mk_rews, termless, subgoal_tac, loop_tacs, solvers))
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   696
  handle Net.INSERT =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   697
    (cond_warning ctxt (fn () => "Ignoring duplicate simplification procedure " ^ quote name);
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   698
      ctxt));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   699
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   700
fun del_proc (proc as Proc {name, lhs, ...}) ctxt =
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   701
  ctxt |> map_simpset2
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   702
    (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   703
      (congs, Net.delete_term eq_proc (Thm.term_of lhs, proc) procs,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   704
        mk_rews, termless, subgoal_tac, loop_tacs, solvers))
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   705
  handle Net.DELETE =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   706
    (cond_warning ctxt (fn () => "Simplification procedure " ^ quote name ^ " not in simpset");
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   707
      ctxt);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   708
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   709
fun prep_procs (Simproc {name, lhss, proc, id}) =
22669
62857ad97cca Morphism.transform/form;
wenzelm
parents: 22360
diff changeset
   710
  lhss |> map (fn lhs => Proc {name = name, lhs = lhs, proc = Morphism.form proc, id = id});
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   711
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   712
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   713
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   714
fun ctxt addsimprocs ps = fold (fold add_proc o prep_procs) ps ctxt;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   715
fun ctxt delsimprocs ps = fold (fold del_proc o prep_procs) ps ctxt;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   716
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   717
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   718
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   719
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   720
(* mk_rews *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   721
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   722
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   723
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   724
fun map_mk_rews f =
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   725
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   726
    let
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   727
      val {mk, mk_cong, mk_sym, mk_eq_True, reorient} = mk_rews;
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   728
      val (mk', mk_cong', mk_sym', mk_eq_True', reorient') =
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   729
        f (mk, mk_cong, mk_sym, mk_eq_True, reorient);
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   730
      val mk_rews' = {mk = mk', mk_cong = mk_cong', mk_sym = mk_sym', mk_eq_True = mk_eq_True',
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   731
        reorient = reorient'};
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   732
    in (congs, procs, mk_rews', termless, subgoal_tac, loop_tacs, solvers) end);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   733
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   734
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   735
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   736
fun mksimps ctxt =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   737
  let val Simpset (_, {mk_rews = {mk, ...}, ...}) = simpset_of ctxt
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   738
  in mk ctxt end;
30318
3d03190d2864 replaced archaic use of rep_ss by Simplifier.mksimps;
wenzelm
parents: 29269
diff changeset
   739
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   740
fun set_mksimps mk = map_mk_rews (fn (_, mk_cong, mk_sym, mk_eq_True, reorient) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   741
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   742
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   743
fun set_mkcong mk_cong = map_mk_rews (fn (mk, _, mk_sym, mk_eq_True, reorient) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   744
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   745
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   746
fun set_mksym mk_sym = map_mk_rews (fn (mk, mk_cong, _, mk_eq_True, reorient) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   747
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   748
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   749
fun set_mkeqTrue mk_eq_True = map_mk_rews (fn (mk, mk_cong, mk_sym, _, reorient) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   750
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   751
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   752
fun set_reorient reorient = map_mk_rews (fn (mk, mk_cong, mk_sym, mk_eq_True, _) =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   753
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   754
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   755
end;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   756
14242
ec70653a02bf Added access to the mk_rews field (and friends).
skalberg
parents: 14040
diff changeset
   757
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   758
(* termless *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   759
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   760
fun set_termless termless =
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   761
  map_simpset2 (fn (congs, procs, mk_rews, _, subgoal_tac, loop_tacs, solvers) =>
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   762
   (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   763
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   764
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   765
(* tactics *)
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   766
45625
750c5a47400b modernized some old-style infix operations, which were left over from the time of ML proof scripts;
wenzelm
parents: 45621
diff changeset
   767
fun set_subgoaler subgoal_tac =
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   768
  map_simpset2 (fn (congs, procs, mk_rews, termless, _, loop_tacs, solvers) =>
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   769
   (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   770
52037
837211662fb8 tuned signature -- depend on context by default;
wenzelm
parents: 51717
diff changeset
   771
fun ctxt setloop tac = ctxt |>
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   772
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, _, solvers) =>
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   773
   (congs, procs, mk_rews, termless, subgoal_tac, [("", tac)], solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   774
52037
837211662fb8 tuned signature -- depend on context by default;
wenzelm
parents: 51717
diff changeset
   775
fun ctxt addloop (name, tac) = ctxt |>
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   776
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   777
    (congs, procs, mk_rews, termless, subgoal_tac,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   778
     AList.update (op =) (name, tac) loop_tacs, solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   779
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   780
fun ctxt delloop name = ctxt |>
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   781
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
21286
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   782
    (congs, procs, mk_rews, termless, subgoal_tac,
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   783
     (if AList.defined (op =) loop_tacs name then ()
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   784
      else cond_warning ctxt (fn () => "No such looper in simpset: " ^ quote name);
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   785
      AList.delete (op =) name loop_tacs), solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   786
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   787
fun ctxt setSSolver solver = ctxt |> map_simpset2
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   788
  (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, (unsafe_solvers, _)) =>
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   789
    (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, (unsafe_solvers, [solver])));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   790
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   791
fun ctxt addSSolver solver = ctxt |> map_simpset2 (fn (congs, procs, mk_rews, termless,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   792
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   793
    subgoal_tac, loop_tacs, (unsafe_solvers, insert eq_solver solver solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   794
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   795
fun ctxt setSolver solver = ctxt |> map_simpset2 (fn (congs, procs, mk_rews, termless,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   796
  subgoal_tac, loop_tacs, (_, solvers)) => (congs, procs, mk_rews, termless,
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   797
    subgoal_tac, loop_tacs, ([solver], solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   798
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   799
fun ctxt addSolver solver = ctxt |> map_simpset2 (fn (congs, procs, mk_rews, termless,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   800
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   801
    subgoal_tac, loop_tacs, (insert eq_solver solver unsafe_solvers, solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   802
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   803
fun set_solvers solvers = map_simpset2 (fn (congs, procs, mk_rews, termless,
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   804
  subgoal_tac, loop_tacs, _) => (congs, procs, mk_rews, termless,
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   805
  subgoal_tac, loop_tacs, (solvers, solvers)));
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   806
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   807
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   808
(* trace operations *)
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   809
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   810
type trace_ops =
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   811
 {trace_invoke: {depth: int, term: term} -> Proof.context -> Proof.context,
55316
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   812
  trace_apply: {unconditional: bool, term: term, thm: thm, rrule: rrule} ->
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   813
    Proof.context -> (Proof.context -> (thm * term) option) -> (thm * term) option};
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   814
54731
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   815
structure Trace_Ops = Theory_Data
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   816
(
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   817
  type T = trace_ops;
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   818
  val empty: T =
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   819
   {trace_invoke = fn _ => fn ctxt => ctxt,
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   820
    trace_apply = fn _ => fn ctxt => fn cont => cont ctxt};
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   821
  val extend = I;
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   822
  fun merge (trace_ops, _) = trace_ops;
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   823
);
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   824
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   825
val set_trace_ops = Trace_Ops.put;
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   826
384ac33802b0 clarified Trace_Ops: global theory data avoids init of simpset in Pure.thy, which is important to act as neutral element in merge;
wenzelm
parents: 54729
diff changeset
   827
val trace_ops = Trace_Ops.get o Proof_Context.theory_of;
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   828
fun trace_invoke args ctxt = #trace_invoke (trace_ops ctxt) args ctxt;
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   829
fun trace_apply args ctxt = #trace_apply (trace_ops ctxt) args ctxt;
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   830
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   831
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   832
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   833
(** rewriting **)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   834
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   835
(*
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   836
  Uses conversions, see:
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   837
    L C Paulson, A higher-order implementation of rewriting,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   838
    Science of Computer Programming 3 (1983), pages 119-149.
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   839
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   840
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   841
fun check_conv ctxt msg thm thm' =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   842
  let
36944
dbf831a50e4a less pervasive names from structure Thm;
wenzelm
parents: 36610
diff changeset
   843
    val thm'' = Thm.transitive thm thm' handle THM _ =>
59690
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   844
      let
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   845
        val nthm' =
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   846
          Thm.transitive (Thm.symmetric (Drule.beta_eta_conversion (Thm.lhs_of thm'))) thm'
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   847
      in Thm.transitive thm nthm' handle THM _ =>
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   848
           let
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   849
             val nthm =
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   850
               Thm.transitive thm (Drule.beta_eta_conversion (Thm.rhs_of thm))
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   851
           in Thm.transitive nthm nthm' end
46b635624feb rhs of eqn is only eta- but not beta-eta-contracted; hence the latter is performed explicitly if needed
nipkow
parents: 59647
diff changeset
   852
      end
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   853
    val _ =
55031
wenzelm
parents: 55028
diff changeset
   854
      if msg then cond_tracing ctxt (fn () => print_thm ctxt "SUCCEEDED" ("", thm'))
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   855
      else ();
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   856
  in SOME thm'' end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   857
  handle THM _ =>
26626
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   858
    let
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   859
      val _ $ _ $ prop0 = Thm.prop_of thm;
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   860
      val _ =
55032
b49366215417 back to conditional tracing instead of noisy warning (see also 00e849f5b397): these incidents happen occasionally;
wenzelm
parents: 55031
diff changeset
   861
        cond_tracing ctxt (fn () =>
b49366215417 back to conditional tracing instead of noisy warning (see also 00e849f5b397): these incidents happen occasionally;
wenzelm
parents: 55031
diff changeset
   862
          print_thm ctxt "Proved wrong theorem (bad subgoaler?)" ("", thm') ^ "\n" ^
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   863
          print_term ctxt "Should have proved:" prop0);
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   864
    in NONE end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   865
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   866
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   867
(* mk_procrule *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   868
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   869
fun mk_procrule ctxt thm =
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   870
  let val (prems, lhs, elhs, rhs, _) = decomp_simp thm in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   871
    if rewrite_rule_extra_vars prems lhs rhs
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   872
    then (cond_warning ctxt (fn () => print_thm ctxt "Extra vars on rhs:" ("", thm)); [])
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   873
    else [mk_rrule2 {thm = thm, name = "", lhs = lhs, elhs = elhs, perm = false}]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   874
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   875
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   876
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   877
(* rewritec: conversion to apply the meta simpset to a term *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   878
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   879
(*Since the rewriting strategy is bottom-up, we avoid re-normalizing already
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   880
  normalized terms by carrying around the rhs of the rewrite rule just
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   881
  applied. This is called the `skeleton'. It is decomposed in parallel
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   882
  with the term. Once a Var is encountered, the corresponding term is
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   883
  already in normal form.
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   884
  skel0 is a dummy skeleton that is to enforce complete normalization.*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   885
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   886
val skel0 = Bound 0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   887
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   888
(*Use rhs as skeleton only if the lhs does not contain unnormalized bits.
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   889
  The latter may happen iff there are weak congruence rules for constants
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   890
  in the lhs.*)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   891
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   892
fun uncond_skel ((_, weak), (lhs, rhs)) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   893
  if null weak then rhs  (*optimization*)
51591
e4aeb102ad70 amended uncond_skel to observe notion of cong_name properly -- may affect simplification with Free congs;
wenzelm
parents: 51590
diff changeset
   894
  else if exists_subterm
e4aeb102ad70 amended uncond_skel to observe notion of cong_name properly -- may affect simplification with Free congs;
wenzelm
parents: 51590
diff changeset
   895
    (fn Const (a, _) => member (op =) weak (true, a)
e4aeb102ad70 amended uncond_skel to observe notion of cong_name properly -- may affect simplification with Free congs;
wenzelm
parents: 51590
diff changeset
   896
      | Free (a, _) => member (op =) weak (false, a)
e4aeb102ad70 amended uncond_skel to observe notion of cong_name properly -- may affect simplification with Free congs;
wenzelm
parents: 51590
diff changeset
   897
      | _ => false) lhs then skel0
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   898
  else rhs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   899
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   900
(*Behaves like unconditional rule if rhs does not contain vars not in the lhs.
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   901
  Otherwise those vars may become instantiated with unnormalized terms
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   902
  while the premises are solved.*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   903
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   904
fun cond_skel (args as (_, (lhs, rhs))) =
33038
8f9594c31de4 dropped redundant gen_ prefix
haftmann
parents: 33037
diff changeset
   905
  if subset (op =) (Term.add_vars rhs [], Term.add_vars lhs []) then uncond_skel args
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   906
  else skel0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   907
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   908
(*
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   909
  Rewriting -- we try in order:
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   910
    (1) beta reduction
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   911
    (2) unconditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   912
    (3) conditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   913
    (4) simplification procedures
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   914
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   915
  IMPORTANT: rewrite rules must not introduce new Vars or TVars!
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   916
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   917
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
   918
fun rewritec (prover, maxt) ctxt t =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   919
  let
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   920
    val Simpset ({rules, ...}, {congs, procs, termless, ...}) = simpset_of ctxt;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   921
    val eta_thm = Thm.eta_conversion t;
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   922
    val eta_t' = Thm.rhs_of eta_thm;
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   923
    val eta_t = Thm.term_of eta_t';
55316
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   924
    fun rew rrule =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   925
      let
55316
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   926
        val {thm, name, lhs, elhs, extra, fo, perm} = rrule
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   927
        val prop = Thm.prop_of thm;
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   928
        val (rthm, elhs') =
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   929
          if maxt = ~1 orelse not extra then (thm, elhs)
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   930
          else (Thm.incr_indexes (maxt + 1) thm, Thm.incr_indexes_cterm (maxt + 1) elhs);
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   931
        val insts =
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   932
          if fo then Thm.first_order_match (elhs', eta_t')
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   933
          else Thm.match (elhs', eta_t');
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   934
        val thm' = Thm.instantiate insts (Thm.rename_boundvars lhs eta_t rthm);
14643
wenzelm
parents: 14330
diff changeset
   935
        val prop' = Thm.prop_of thm';
21576
8c11b1ce2f05 simplified Logic.count_prems;
wenzelm
parents: 21565
diff changeset
   936
        val unconditional = (Logic.count_prems prop' = 0);
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   937
        val (lhs', rhs') = Logic.dest_equals (Logic.strip_imp_concl prop');
55316
885500f4aa6a interactive simplifier trace: new panel in Isabelle/jEdit to inspect and modify simplification state
Lars Hupel <lars.hupel@mytum.de>
parents: 55032
diff changeset
   938
        val trace_args = {unconditional = unconditional, term = eta_t, thm = thm', rrule = rrule};
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   939
      in
11295
66925f23ac7f improved tracing of permutative rules.
nipkow
parents: 11291
diff changeset
   940
        if perm andalso not (termless (rhs', lhs'))
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   941
        then
55031
wenzelm
parents: 55028
diff changeset
   942
         (cond_tracing ctxt (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   943
            print_thm ctxt "Cannot apply permutative rewrite rule" (name, thm) ^ "\n" ^
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   944
            print_thm ctxt "Term does not become smaller:" ("", thm'));
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   945
          NONE)
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   946
        else
55031
wenzelm
parents: 55028
diff changeset
   947
         (cond_tracing ctxt (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   948
            print_thm ctxt "Applying instance of rewrite rule" (name, thm));
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   949
          if unconditional
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   950
          then
55031
wenzelm
parents: 55028
diff changeset
   951
           (cond_tracing ctxt (fn () => print_thm ctxt "Rewriting:" ("", thm'));
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   952
            trace_apply trace_args ctxt (fn ctxt' =>
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   953
              let
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   954
                val lr = Logic.dest_equals prop;
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   955
                val SOME thm'' = check_conv ctxt' false eta_thm thm';
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   956
              in SOME (thm'', uncond_skel (congs, lr)) end))
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   957
          else
55031
wenzelm
parents: 55028
diff changeset
   958
           (cond_tracing ctxt (fn () => print_thm ctxt "Trying to rewrite:" ("", thm'));
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   959
            if simp_depth ctxt > Config.get ctxt simp_depth_limit
55031
wenzelm
parents: 55028
diff changeset
   960
            then (cond_tracing ctxt (fn () => "simp_depth_limit exceeded - giving up"); NONE)
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   961
            else
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   962
              trace_apply trace_args ctxt (fn ctxt' =>
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   963
                (case prover ctxt' thm' of
55031
wenzelm
parents: 55028
diff changeset
   964
                  NONE => (cond_tracing ctxt' (fn () => print_thm ctxt' "FAILED" ("", thm')); NONE)
54729
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   965
                | SOME thm2 =>
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   966
                    (case check_conv ctxt' true eta_thm thm2 of
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   967
                      NONE => NONE
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   968
                    | SOME thm2' =>
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   969
                        let
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   970
                          val concl = Logic.strip_imp_concl prop;
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   971
                          val lr = Logic.dest_equals concl;
c5cd7a58cf2d generic trace operations for main steps of Simplifier;
wenzelm
parents: 54728
diff changeset
   972
                        in SOME (thm2', cond_skel (congs, lr)) end)))))
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
   973
      end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   974
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   975
    fun rews [] = NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   976
      | rews (rrule :: rrules) =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   977
          let val opt = rew rrule handle Pattern.MATCH => NONE
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   978
          in (case opt of NONE => rews rrules | some => some) end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   979
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   980
    fun sort_rrules rrs =
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   981
      let
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   982
        fun is_simple ({thm, ...}: rrule) =
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   983
          (case Thm.prop_of thm of
56245
84fc7dfa3cd4 more qualified names;
wenzelm
parents: 55635
diff changeset
   984
            Const ("Pure.eq", _) $ _ $ _ => true
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   985
          | _ => false);
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   986
        fun sort [] (re1, re2) = re1 @ re2
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   987
          | sort (rr :: rrs) (re1, re2) =
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   988
              if is_simple rr
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   989
              then sort rrs (rr :: re1, re2)
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   990
              else sort rrs (re1, rr :: re2);
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
   991
      in sort rrs ([], []) end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   992
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   993
    fun proc_rews [] = NONE
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   994
      | proc_rews (Proc {name, proc, lhs, ...} :: ps) =
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
   995
          if Pattern.matches (Proof_Context.theory_of ctxt) (Thm.term_of lhs, Thm.term_of t) then
55031
wenzelm
parents: 55028
diff changeset
   996
            (cond_tracing' ctxt simp_debug (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
   997
              print_term ctxt ("Trying procedure " ^ quote name ^ " on:") eta_t);
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
   998
             (case proc ctxt eta_t' of
55031
wenzelm
parents: 55028
diff changeset
   999
               NONE => (cond_tracing' ctxt simp_debug (fn () => "FAILED"); proc_rews ps)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1000
             | SOME raw_thm =>
55031
wenzelm
parents: 55028
diff changeset
  1001
                 (cond_tracing ctxt (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1002
                    print_thm ctxt ("Procedure " ^ quote name ^ " produced rewrite rule:")
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1003
                      ("", raw_thm));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1004
                  (case rews (mk_procrule ctxt raw_thm) of
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1005
                    NONE =>
55031
wenzelm
parents: 55028
diff changeset
  1006
                     (cond_tracing ctxt (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1007
                        print_term ctxt ("IGNORED result of simproc " ^ quote name ^
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1008
                            " -- does not match") (Thm.term_of t));
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1009
                      proc_rews ps)
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1010
                  | some => some))))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1011
          else proc_rews ps;
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1012
  in
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1013
    (case eta_t of
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1014
      Abs _ $ _ => SOME (Thm.transitive eta_thm (Thm.beta_conversion false eta_t'), skel0)
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1015
    | _ =>
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1016
      (case rews (sort_rrules (Net.match_term rules eta_t)) of
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1017
        NONE => proc_rews (Net.match_term procs eta_t)
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1018
      | some => some))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1019
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1020
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1021
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1022
(* conversion to apply a congruence rule to a term *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1023
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1024
fun congc prover ctxt maxt cong t =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1025
  let
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1026
    val rthm = Thm.incr_indexes (maxt + 1) cong;
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1027
    val rlhs = fst (Thm.dest_equals (Drule.strip_imp_concl (Thm.cprop_of rthm)));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1028
    val insts = Thm.match (rlhs, t)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1029
    (* Thm.match can raise Pattern.MATCH;
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1030
       is handled when congc is called *)
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1031
    val thm' =
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1032
      Thm.instantiate insts (Thm.rename_boundvars (Thm.term_of rlhs) (Thm.term_of t) rthm);
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1033
    val _ =
55031
wenzelm
parents: 55028
diff changeset
  1034
      cond_tracing ctxt (fn () => print_thm ctxt "Applying congruence rule:" ("", thm'));
wenzelm
parents: 55028
diff changeset
  1035
    fun err (msg, thm) = (cond_tracing ctxt (fn () => print_thm ctxt msg ("", thm)); NONE);
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1036
  in
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1037
    (case prover thm' of
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1038
      NONE => err ("Congruence proof failed.  Could not prove", thm')
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1039
    | SOME thm2 =>
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1040
        (case check_conv ctxt true (Drule.beta_eta_conversion t) thm2 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1041
          NONE => err ("Congruence proof failed.  Should not have proved", thm2)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1042
        | SOME thm2' =>
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1043
            if op aconv (apply2 Thm.term_of (Thm.dest_equals (Thm.cprop_of thm2')))
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1044
            then NONE else SOME thm2'))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1045
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1046
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1047
val (cA, (cB, cC)) =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1048
  apsnd Thm.dest_equals (Thm.dest_implies (hd (cprems_of Drule.imp_cong)));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1049
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1050
fun transitive1 NONE NONE = NONE
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1051
  | transitive1 (SOME thm1) NONE = SOME thm1
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1052
  | transitive1 NONE (SOME thm2) = SOME thm2
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1053
  | transitive1 (SOME thm1) (SOME thm2) = SOME (Thm.transitive thm1 thm2);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1054
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1055
fun transitive2 thm = transitive1 (SOME thm);
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1056
fun transitive3 thm = transitive1 thm o SOME;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1057
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
  1058
fun bottomc ((simprem, useprem, mutsimp), prover, maxidx) =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1059
  let
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1060
    fun botc skel ctxt t =
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1061
      if is_Var skel then NONE
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1062
      else
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1063
        (case subc skel ctxt t of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1064
           some as SOME thm1 =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1065
             (case rewritec (prover, maxidx) ctxt (Thm.rhs_of thm1) of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1066
                SOME (thm2, skel2) =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1067
                  transitive2 (Thm.transitive thm1 thm2)
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1068
                    (botc skel2 ctxt (Thm.rhs_of thm2))
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1069
              | NONE => some)
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1070
         | NONE =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1071
             (case rewritec (prover, maxidx) ctxt t of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1072
                SOME (thm2, skel2) => transitive2 thm2
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1073
                  (botc skel2 ctxt (Thm.rhs_of thm2))
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1074
              | NONE => NONE))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1075
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1076
    and try_botc ctxt t =
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1077
      (case botc skel0 ctxt t of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1078
        SOME trec1 => trec1
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1079
      | NONE => Thm.reflexive t)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1080
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1081
    and subc skel ctxt t0 =
55014
a93f496f6c30 general notion of auxiliary bounds within context;
wenzelm
parents: 55000
diff changeset
  1082
        let val Simpset (_, {congs, ...}) = simpset_of ctxt in
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1083
          (case Thm.term_of t0 of
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1084
              Abs (a, T, _) =>
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1085
                let
55635
00e900057b38 tuned signature;
wenzelm
parents: 55377
diff changeset
  1086
                    val (v, ctxt') = Variable.next_bound (a, T) ctxt;
00e900057b38 tuned signature;
wenzelm
parents: 55377
diff changeset
  1087
                    val b = #1 (Term.dest_Free v);
00e900057b38 tuned signature;
wenzelm
parents: 55377
diff changeset
  1088
                    val (v', t') = Thm.dest_abs (SOME b) t0;
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1089
                    val b' = #1 (Term.dest_Free (Thm.term_of v'));
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1090
                    val _ =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1091
                      if b <> b' then
55635
00e900057b38 tuned signature;
wenzelm
parents: 55377
diff changeset
  1092
                        warning ("Bad Simplifier context: renamed bound variable " ^
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1093
                          quote b ^ " to " ^ quote b' ^ Position.here (Position.thread_data ()))
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1094
                      else ();
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1095
                    val skel' = (case skel of Abs (_, _, sk) => sk | _ => skel0);
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1096
                in
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1097
                  (case botc skel' ctxt' t' of
55635
00e900057b38 tuned signature;
wenzelm
parents: 55377
diff changeset
  1098
                    SOME thm => SOME (Thm.abstract_rule a v' thm)
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1099
                  | NONE => NONE)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1100
                end
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1101
            | t $ _ =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1102
              (case t of
56245
84fc7dfa3cd4 more qualified names;
wenzelm
parents: 55635
diff changeset
  1103
                Const ("Pure.imp", _) $ _  => impc t0 ctxt
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1104
              | Abs _ =>
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1105
                  let val thm = Thm.beta_conversion false t0
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1106
                  in
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1107
                    (case subc skel0 ctxt (Thm.rhs_of thm) of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1108
                      NONE => SOME thm
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1109
                    | SOME thm' => SOME (Thm.transitive thm thm'))
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1110
                  end
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1111
              | _  =>
54727
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1112
                  let
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1113
                    fun appc () =
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1114
                      let
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1115
                        val (tskel, uskel) =
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1116
                          (case skel of
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1117
                            tskel $ uskel => (tskel, uskel)
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1118
                          | _ => (skel0, skel0));
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1119
                        val (ct, cu) = Thm.dest_comb t0;
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1120
                      in
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1121
                        (case botc tskel ctxt ct of
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1122
                          SOME thm1 =>
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1123
                            (case botc uskel ctxt cu of
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1124
                              SOME thm2 => SOME (Thm.combination thm1 thm2)
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1125
                            | NONE => SOME (Thm.combination thm1 (Thm.reflexive cu)))
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1126
                        | NONE =>
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1127
                            (case botc uskel ctxt cu of
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1128
                              SOME thm1 => SOME (Thm.combination (Thm.reflexive ct) thm1)
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1129
                            | NONE => NONE))
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1130
                      end;
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1131
                    val (h, ts) = strip_comb t;
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1132
                  in
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1133
                    (case cong_name h of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1134
                      SOME a =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1135
                        (case AList.lookup (op =) (fst congs) a of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1136
                           NONE => appc ()
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1137
                        | SOME cong =>
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1138
     (*post processing: some partial applications h t1 ... tj, j <= length ts,
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1139
       may be a redex. Example: map (%x. x) = (%xs. xs) wrt map_cong*)
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1140
                           (let
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1141
                              val thm = congc (prover ctxt) ctxt maxidx cong t0;
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1142
                              val t = the_default t0 (Option.map Thm.rhs_of thm);
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1143
                              val (cl, cr) = Thm.dest_comb t
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1144
                              val dVar = Var(("", 0), dummyT)
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1145
                              val skel =
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1146
                                list_comb (h, replicate (length ts) dVar)
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1147
                            in
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1148
                              (case botc skel ctxt cl of
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1149
                                NONE => thm
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1150
                              | SOME thm' =>
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1151
                                  transitive3 thm (Thm.combination thm' (Thm.reflexive cr)))
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1152
                            end handle Pattern.MATCH => appc ()))
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1153
                     | _ => appc ())
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1154
                  end)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1155
            | _ => NONE)
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1156
        end
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1157
    and impc ct ctxt =
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1158
      if mutsimp then mut_impc0 [] ct [] [] ctxt
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1159
      else nonmut_impc ct ctxt
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1160
54984
da70ab8531f4 more elementary management of declared hyps, below structure Assumption;
wenzelm
parents: 54982
diff changeset
  1161
    and rules_of_prem prem ctxt =
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1162
      if maxidx_of_term (Thm.term_of prem) <> ~1
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1163
      then
55031
wenzelm
parents: 55028
diff changeset
  1164
       (cond_tracing ctxt (fn () =>
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1165
          print_term ctxt "Cannot add premise as rewrite rule because it contains (type) unknowns:"
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1166
            (Thm.term_of prem));
55028
00e849f5b397 clarified Simplifier diagnostics -- simplified ML;
wenzelm
parents: 55014
diff changeset
  1167
        (([], NONE), ctxt))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1168
      else
54984
da70ab8531f4 more elementary management of declared hyps, below structure Assumption;
wenzelm
parents: 54982
diff changeset
  1169
        let val (asm, ctxt') = Thm.assume_hyps prem ctxt
da70ab8531f4 more elementary management of declared hyps, below structure Assumption;
wenzelm
parents: 54982
diff changeset
  1170
        in ((extract_safe_rrules ctxt' asm, SOME asm), ctxt') end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1171
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1172
    and add_rrules (rrss, asms) ctxt =
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1173
      (fold o fold) insert_rrule rrss ctxt |> add_prems (map_filter I asms)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1174
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1175
    and disch r prem eq =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1176
      let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1177
        val (lhs, rhs) = Thm.dest_equals (Thm.cprop_of eq);
54727
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1178
        val eq' =
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1179
          Thm.implies_elim
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1180
            (Thm.instantiate ([], [(cA, prem), (cB, lhs), (cC, rhs)]) Drule.imp_cong)
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1181
            (Thm.implies_intr prem eq);
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1182
      in
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1183
        if not r then eq'
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1184
        else
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1185
          let
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1186
            val (prem', concl) = Thm.dest_implies lhs;
54727
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1187
            val (prem'', _) = Thm.dest_implies rhs;
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1188
          in
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1189
            Thm.transitive
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1190
              (Thm.transitive
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1191
                (Thm.instantiate ([], [(cA, prem'), (cB, prem), (cC, concl)]) Drule.swap_prems_eq)
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1192
                eq')
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1193
              (Thm.instantiate ([], [(cA, prem), (cB, prem''), (cC, concl)]) Drule.swap_prems_eq)
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1194
          end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1195
      end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1196
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1197
    and rebuild [] _ _ _ _ eq = eq
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1198
      | rebuild (prem :: prems) concl (_ :: rrss) (_ :: asms) ctxt eq =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1199
          let
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1200
            val ctxt' = add_rrules (rev rrss, rev asms) ctxt;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1201
            val concl' =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1202
              Drule.mk_implies (prem, the_default concl (Option.map Thm.rhs_of eq));
54727
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1203
            val dprem = Option.map (disch false prem);
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1204
          in
52091
9ec2d47de6a7 more rigorous check of simplifier context;
wenzelm
parents: 52082
diff changeset
  1205
            (case rewritec (prover, maxidx) ctxt' concl' of
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1206
              NONE => rebuild prems concl' rrss asms ctxt (dprem eq)
54727
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1207
            | SOME (eq', _) =>
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1208
                transitive2 (fold (disch false) prems (the (transitive3 (dprem eq) eq')))
a806e7251cf0 tuned whitespace;
wenzelm
parents: 54725
diff changeset
  1209
                  (mut_impc0 (rev prems) (Thm.rhs_of eq') (rev rrss) (rev asms) ctxt))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1210
          end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1211
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1212
    and mut_impc0 prems concl rrss asms ctxt =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1213
      let
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1214
        val prems' = strip_imp_prems concl;
54984
da70ab8531f4 more elementary management of declared hyps, below structure Assumption;
wenzelm
parents: 54982
diff changeset
  1215
        val ((rrss', asms'), ctxt') = fold_map rules_of_prem prems' ctxt |>> split_list;
38834
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1216
      in
658fcba35ed7 more careful treatment of context visibility flag wrt. spurious warnings;
wenzelm
parents: 38715
diff changeset
  1217
        mut_impc (prems @ prems') (strip_imp_concl concl) (rrss @ rrss')
54984
da70ab8531f4 more elementary management of declared hyps, below structure Assumption;
wenzelm
parents: 54982
diff changeset
  1218
          (asms @ asms') [] [] [] [] ctxt' ~1 ~1
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1219
      end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1220
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1221
    and mut_impc [] concl [] [] prems' rrss' asms' eqns ctxt changed k =
33245
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33039
diff changeset
  1222
        transitive1 (fold (fn (eq1, prem) => fn eq2 => transitive1 eq1
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33039
diff changeset
  1223
            (Option.map (disch false prem) eq2)) (eqns ~~ prems') NONE)
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1224
          (if changed > 0 then
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1225
             mut_impc (rev prems') concl (rev rrss') (rev asms')
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1226
               [] [] [] [] ctxt ~1 changed
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1227
           else rebuild prems' concl rrss' asms' ctxt
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1228
             (botc skel0 (add_rrules (rev rrss', rev asms') ctxt) concl))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1229
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1230
      | mut_impc (prem :: prems) concl (rrs :: rrss) (asm :: asms)
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1231
          prems' rrss' asms' eqns ctxt changed k =
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1232
        (case (if k = 0 then NONE else botc skel0 (add_rrules
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1233
          (rev rrss' @ rrss, rev asms' @ asms) ctxt) prem) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1234
            NONE => mut_impc prems concl rrss asms (prem :: prems')
51717
9e7d1c139569 simplifier uses proper Proof.context instead of historic type simpset;
wenzelm
parents: 51611
diff changeset
  1235
              (rrs :: rrss') (asm :: asms') (NONE :: eqns) ctxt changed
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1236
              (if k = 0 then 0 else k - 1)
54725
fc384e0a7f51 tuned whitespace;
wenzelm
parents: 54724
diff changeset
  1237
        | SOME eqn =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1238
            let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1239
              val prem' = Thm.rhs_of eqn;
59582
0fbed69ff081 tuned signature -- prefer qualified names;
wenzelm
parents: 59498
diff changeset
  1240
              val tprems = map Thm.term_of prems;
33029
2fefe039edf1 uniform use of Integer.min/max;
wenzelm
parents: 32797