src/Pure/meta_simplifier.ML
author wenzelm
Fri, 15 Sep 2006 20:08:38 +0200
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child 20579 4dc799edef89
permissions -rw-r--r--
rrule: maintain 'extra' field for rule that contain extra vars outside elhs; rewrite_rule_extra_vars: tuned; rewritec: omit incr_indexes in most cases, which is a big performance gain;
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(*  Title:      Pure/meta_simplifier.ML
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    ID:         $Id$
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    Author:     Tobias Nipkow and Stefan Berghofer
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Meta-level Simplification.
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*)
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infix 4
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  addsimps delsimps addeqcongs deleqcongs addcongs delcongs addsimprocs delsimprocs
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  setmksimps setmkcong setmksym setmkeqTrue settermless setsubgoaler
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  setloop' setloop addloop addloop' delloop setSSolver addSSolver setSolver addSolver;
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signature BASIC_META_SIMPLIFIER =
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sig
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  val debug_simp: bool ref
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  val trace_simp: bool ref
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  val simp_depth_limit: int ref
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  val trace_simp_depth_limit: int ref
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  type rrule
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  val eq_rrule: rrule * rrule -> bool
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  type cong
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  type simpset
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  type proc
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  type solver
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  val mk_solver': string -> (simpset -> int -> tactic) -> solver
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  val mk_solver: string -> (thm list -> int -> tactic) -> solver
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  val rep_ss: simpset ->
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   {rules: rrule Net.net,
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    prems: thm list,
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    bounds: int * ((string * typ) * string) list,
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    context: Proof.context option} *
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   {congs: (string * cong) list * string list,
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    procs: proc Net.net,
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    mk_rews:
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     {mk: thm -> thm list,
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      mk_cong: thm -> thm,
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      mk_sym: thm -> thm option,
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      mk_eq_True: thm -> thm option,
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      reorient: theory -> term list -> term -> term -> bool},
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    termless: term * term -> bool,
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    subgoal_tac: simpset -> int -> tactic,
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    loop_tacs: (string * (simpset -> int -> tactic)) list,
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    solvers: solver list * solver list}
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  val print_ss: simpset -> unit
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  val empty_ss: simpset
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  val merge_ss: simpset * simpset -> simpset
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  type simproc
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  val mk_simproc: string -> cterm list ->
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    (theory -> simpset -> term -> thm option) -> simproc
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  val add_prems: thm list -> simpset -> simpset
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  val prems_of_ss: simpset -> thm list
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  val addsimps: simpset * thm list -> simpset
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  val delsimps: simpset * thm list -> simpset
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  val addeqcongs: simpset * thm list -> simpset
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  val deleqcongs: simpset * thm list -> simpset
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  val addcongs: simpset * thm list -> simpset
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  val delcongs: simpset * thm list -> simpset
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  val addsimprocs: simpset * simproc list -> simpset
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  val delsimprocs: simpset * simproc list -> simpset
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  val setmksimps: simpset * (thm -> thm list) -> simpset
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  val setmkcong: simpset * (thm -> thm) -> simpset
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  val setmksym: simpset * (thm -> thm option) -> simpset
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  val setmkeqTrue: simpset * (thm -> thm option) -> simpset
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  val settermless: simpset * (term * term -> bool) -> simpset
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  val setsubgoaler: simpset * (simpset -> int -> tactic) -> simpset
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  val setloop': simpset * (simpset -> int -> tactic) -> simpset
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  val setloop: simpset * (int -> tactic) -> simpset
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  val addloop': simpset * (string * (simpset -> int -> tactic)) -> simpset
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  val addloop: simpset * (string * (int -> tactic)) -> simpset
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  val delloop: simpset * string -> simpset
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  val setSSolver: simpset * solver -> simpset
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  val addSSolver: simpset * solver -> simpset
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  val setSolver: simpset * solver -> simpset
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  val addSolver: simpset * solver -> simpset
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  val norm_hhf: thm -> thm
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  val norm_hhf_protect: thm -> thm
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end;
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signature META_SIMPLIFIER =
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sig
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  include BASIC_META_SIMPLIFIER
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  exception SIMPLIFIER of string * thm
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  val solver: simpset -> solver -> int -> tactic
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  val clear_ss: simpset -> simpset
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  exception SIMPROC_FAIL of string * exn
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  val simproc_i: theory -> string -> term list
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    -> (theory -> simpset -> term -> thm option) -> simproc
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  val simproc: theory -> string -> string list
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    -> (theory -> simpset -> term -> thm option) -> simproc
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  val inherit_context: simpset -> simpset -> simpset
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  val the_context: simpset -> Proof.context
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  val context: Proof.context -> simpset -> simpset
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  val theory_context: theory  -> simpset -> simpset
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  val debug_bounds: bool ref
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  val set_reorient: (theory -> term list -> term -> term -> bool) -> simpset -> simpset
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  val set_solvers: solver list -> simpset -> simpset
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  val rewrite_cterm: bool * bool * bool ->
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    (simpset -> thm -> thm option) -> simpset -> cterm -> thm
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  val rewrite_aux: (simpset -> thm -> thm option) -> bool -> thm list -> cterm -> thm
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  val simplify_aux: (simpset -> thm -> thm option) -> bool -> thm list -> thm -> thm
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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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    (simpset -> thm -> thm option) -> simpset -> thm -> thm
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  val rewrite_goals_rule_aux: (simpset -> thm -> thm option) -> thm list -> thm -> thm
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  val rewrite_goal_rule: bool * bool * bool ->
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    (simpset -> thm -> thm option) -> simpset -> int -> thm -> thm
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end;
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structure MetaSimplifier: META_SIMPLIFIER =
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struct
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(** datatype simpset **)
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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 etac-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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  Drule.eq_thm_prop (thm1, thm2);
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(* congruences *)
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type cong = {thm: thm, lhs: cterm};
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fun eq_cong ({thm = thm1, ...}: cong, {thm = thm2, ...}: cong) =
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  Drule.eq_thm_prop (thm1, thm2);
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(* simplification sets, procedures, and solvers *)
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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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    bounds: maximal index of bound variables already used
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      (for generating new names when rewriting under lambda abstractions);
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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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type mk_rews =
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 {mk: thm -> thm list,
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  mk_cong: thm -> thm,
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  mk_sym: thm -> thm option,
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  mk_eq_True: thm -> thm option,
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  reorient: theory -> term list -> term -> term -> bool};
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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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    bounds: int * ((string * typ) * string) list,
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    context: Proof.context option} *
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   {congs: (string * cong) list * string list,
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    procs: proc Net.net,
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    mk_rews: mk_rews,
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    termless: term * term -> bool,
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    subgoal_tac: simpset -> int -> tactic,
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    loop_tacs: (string * (simpset -> int -> tactic)) list,
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    solvers: solver list * solver list}
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and proc =
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  Proc of
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   {name: string,
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    lhs: cterm,
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    proc: theory -> simpset -> term -> thm option,
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    id: stamp}
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and solver =
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  Solver of
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   {name: string,
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    solver: simpset -> int -> tactic,
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    id: stamp};
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fun rep_ss (Simpset args) = args;
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fun make_ss1 (rules, prems, bounds, context) =
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  {rules = rules, prems = prems, bounds = bounds, context = context};
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fun map_ss1 f {rules, prems, bounds, context} =
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  make_ss1 (f (rules, prems, bounds, context));
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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 map_simpset f (Simpset ({rules, prems, bounds, context},
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    {congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers})) =
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  make_simpset (f ((rules, prems, bounds, context),
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    (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers)));
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fun map_simpset1 f (Simpset (r1, r2)) = Simpset (map_ss1 f r1, r2);
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fun map_simpset2 f (Simpset (r1, r2)) = Simpset (r1, map_ss2 f r2);
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fun prems_of_ss (Simpset ({prems, ...}, _)) = prems;
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fun eq_proc (Proc {id = id1, ...}, Proc {id = id2, ...}) = (id1 = id2);
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fun mk_solver' name solver = Solver {name = name, solver = solver, id = stamp ()};
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fun mk_solver name solver = mk_solver' name (solver o prems_of_ss);
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fun solver_name (Solver {name, ...}) = name;
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fun solver ss (Solver {solver = tac, ...}) = tac ss;
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fun eq_solver (Solver {id = id1, ...}, Solver {id = id2, ...}) = (id1 = id2);
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val merge_solvers = gen_merge_lists eq_solver;
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(* diagnostics *)
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exception SIMPLIFIER of string * thm;
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val debug_simp = ref false;
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val trace_simp = ref false;
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val simp_depth = ref 0;
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val simp_depth_limit = ref 100;
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val trace_simp_depth_limit = ref 1;
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val trace_simp_depth_limit_exceeded = ref false;
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local
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fun println a =
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  if ! simp_depth > ! trace_simp_depth_limit
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  then if !trace_simp_depth_limit_exceeded then ()
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       else (tracing "trace_simp_depth_limit exceeded!";
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             trace_simp_depth_limit_exceeded := true)
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  else (tracing (enclose "[" "]" (string_of_int (! simp_depth)) ^ a);
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        trace_simp_depth_limit_exceeded := false);
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fun prnt warn a = if warn then warning a else println a;
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fun show_bounds (Simpset ({bounds = (_, bs), ...}, _)) t =
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  let
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    val names = Term.declare_term_names t Name.context;
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    val xs = rev (#1 (Name.variants (rev (map #2 bs)) names));
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    fun subst (((b, T), _), x') = (Free (b, T), Syntax.mark_boundT (x', T));
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  in Term.subst_atomic (ListPair.map subst (bs, xs)) t end;
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in
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fun print_term warn a ss thy t = prnt warn (a ^ "\n" ^
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  Sign.string_of_term thy (if ! debug_simp then t else show_bounds ss t));
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fun debug warn a = if ! debug_simp then prnt warn a else ();
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fun trace warn a = if ! trace_simp then prnt warn a else ();
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fun debug_term warn a ss thy t = if ! debug_simp then print_term warn a ss thy t else ();
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fun trace_term warn a ss thy t = if ! trace_simp then print_term warn a ss thy t else ();
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fun trace_cterm warn a ss ct =
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  if ! trace_simp then print_term warn a ss (Thm.theory_of_cterm ct) (Thm.term_of ct) else ();
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fun trace_thm a ss th =
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  if ! trace_simp then print_term false a ss (Thm.theory_of_thm th) (Thm.full_prop_of th) else ();
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fun trace_named_thm a ss (th, name) =
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  if ! trace_simp then
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    print_term false (if name = "" then a else a ^ " " ^ quote name ^ ":") ss
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      (Thm.theory_of_thm th) (Thm.full_prop_of th)
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  else ();
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fun warn_thm a ss th = print_term true a ss (Thm.theory_of_thm th) (Thm.full_prop_of th);
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fun cond_warn_thm a (ss as Simpset ({context, ...}, _)) th =
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  if is_some context then () else warn_thm a ss th;
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end;
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(* print simpsets *)
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fun print_ss ss =
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  let
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    val pretty_thms = map Display.pretty_thm;
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    fun pretty_cong (name, th) =
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      Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, Display.pretty_thm th];
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    fun pretty_proc (name, lhss) =
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      Pretty.big_list (name ^ ":") (map Display.pretty_cterm lhss);
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    val Simpset ({rules, ...}, {congs, procs, loop_tacs, solvers, ...}) = ss;
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    val smps = map #thm (Net.entries rules);
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    val cngs = map (fn (name, {thm, ...}) => (name, thm)) (#1 congs);
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    val prcs = Net.entries procs |>
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      map (fn Proc {name, lhs, id, ...} => ((name, lhs), id))
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      |> partition_eq (eq_snd (op =))
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      |> map (fn ps => (fst (fst (hd ps)), map (snd o fst) ps))
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      |> Library.sort_wrt fst;
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  in
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    [Pretty.big_list "simplification rules:" (pretty_thms smps),
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      Pretty.big_list "simplification procedures:" (map pretty_proc prcs),
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      Pretty.big_list "congruences:" (map pretty_cong cngs),
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      Pretty.strs ("loopers:" :: map (quote o #1) loop_tacs),
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      Pretty.strs ("unsafe solvers:" :: map (quote o solver_name) (#1 solvers)),
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      Pretty.strs ("safe solvers:" :: map (quote o solver_name) (#2 solvers))]
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    |> Pretty.chunks |> Pretty.writeln
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  end;
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(* simprocs *)
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exception SIMPROC_FAIL of string * exn;
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datatype simproc = Simproc of proc list;
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fun mk_simproc name lhss proc =
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  let val id = stamp () in
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    Simproc (lhss |> map (fn lhs =>
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      Proc {name = name, lhs = lhs, proc = proc, id = id}))
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  end;
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19798
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(* FIXME avoid global thy and Logic.varify *)
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fun simproc_i thy name = mk_simproc name o map (Thm.cterm_of thy o Logic.varify);
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fun simproc thy name = simproc_i thy name o map (Sign.read_term thy);
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   346
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(** simpset operations **)
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(* context *)
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fun eq_bound (x: string, (y, _)) = x = y;
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fun add_bound bound = map_simpset1 (fn (rules, prems, (count, bounds), context) =>
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  (rules, prems, (count + 1, bound :: bounds), context));
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   356
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   357
fun add_prems ths = map_simpset1 (fn (rules, prems, bounds, context) =>
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  (rules, ths @ prems, bounds, context));
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   359
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fun inherit_context (Simpset ({bounds, context, ...}, _)) =
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  map_simpset1 (fn (rules, prems, _, _) => (rules, prems, bounds, context));
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   363
fun the_context (Simpset ({context = SOME ctxt, ...}, _)) = ctxt
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  | the_context _ = raise Fail "Simplifier: no proof context in simpset";
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fun context ctxt =
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   367
  map_simpset1 (fn (rules, prems, bounds, _) => (rules, prems, bounds, SOME ctxt));
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   368
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   369
val theory_context = context o Context.init_proof;
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   370
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   371
fun fallback_context _ (ss as Simpset ({context = SOME _, ...}, _)) = ss
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  | fallback_context thy ss =
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     (warning "Simplifier: no proof context in simpset -- fallback to theory context!";
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   374
      theory_context thy ss);
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   375
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   376
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   377
(* maintain simp rules *)
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   378
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   379
(* FIXME: it seems that the conditions on extra variables are too liberal if
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   380
prems are nonempty: does solving the prems really guarantee instantiation of
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   381
all its Vars? Better: a dynamic check each time a rule is applied.
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   382
*)
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   383
fun rewrite_rule_extra_vars prems elhs erhs =
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   384
  let
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   385
    val elhss = elhs :: prems;
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   386
    val tvars = fold Term.add_tvars elhss [];
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diff changeset
   387
    val vars = fold Term.add_vars elhss [];
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diff changeset
   388
  in
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diff changeset
   389
    erhs |> Term.exists_type (Term.exists_subtype
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diff changeset
   390
      (fn TVar v => not (member (op =) tvars v) | _ => false)) orelse
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diff changeset
   391
    erhs |> Term.exists_subterm
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diff changeset
   392
      (fn Var v => not (member (op =) vars v) | _ => false)
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wenzelm
parents: 20330
diff changeset
   393
  end;
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diff changeset
   394
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   395
fun rrule_extra_vars elhs thm =
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wenzelm
parents: 20330
diff changeset
   396
  rewrite_rule_extra_vars [] (term_of elhs) (Thm.full_prop_of thm);
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diff changeset
   397
15023
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diff changeset
   398
fun mk_rrule2 {thm, name, lhs, elhs, perm} =
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diff changeset
   399
  let
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8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
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diff changeset
   400
    val t = term_of elhs;
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wenzelm
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diff changeset
   401
    val fo = Pattern.first_order t orelse not (Pattern.pattern t);
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wenzelm
parents: 20330
diff changeset
   402
    val extra = rrule_extra_vars elhs thm;
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wenzelm
parents: 20330
diff changeset
   403
  in {thm = thm, name = name, lhs = lhs, elhs = elhs, extra = extra, fo = fo, perm = perm} end;
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0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   404
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   405
fun del_rrule (rrule as {thm, elhs, ...}) ss =
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wenzelm
parents: 19798
diff changeset
   406
  ss |> map_simpset1 (fn (rules, prems, bounds, context) =>
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   407
    (Net.delete_term eq_rrule (term_of elhs, rrule) rules, prems, bounds, context))
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   408
  handle Net.DELETE => (cond_warn_thm "Rewrite rule not in simpset:" ss thm; ss);
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parents: 19798
diff changeset
   409
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   410
fun insert_rrule (rrule as {thm, name, elhs, ...}) ss =
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   411
 (trace_named_thm "Adding rewrite rule" ss (thm, name);
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   412
  ss |> map_simpset1 (fn (rules, prems, bounds, context) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   413
    let
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   414
      val rrule2 as {elhs, ...} = mk_rrule2 rrule;
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   415
      val rules' = Net.insert_term eq_rrule (term_of elhs, rrule2) rules;
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   416
    in (rules', prems, bounds, context) end)
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   417
  handle Net.INSERT => (cond_warn_thm "Ignoring duplicate rewrite rule:" ss thm; ss));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   418
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   419
fun vperm (Var _, Var _) = true
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   420
  | vperm (Abs (_, _, s), Abs (_, _, t)) = vperm (s, t)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   421
  | vperm (t1 $ t2, u1 $ u2) = vperm (t1, u1) andalso vperm (t2, u2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   422
  | vperm (t, u) = (t = u);
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   423
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   424
fun var_perm (t, u) =
20197
ffc64d90fc1f use Term.add_vars instead of obsolete term_varnames;
wenzelm
parents: 20146
diff changeset
   425
  vperm (t, u) andalso gen_eq_set (op =) (Term.add_vars t [], Term.add_vars u []);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   426
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   427
(*simple test for looping rewrite rules and stupid orientations*)
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   428
fun default_reorient thy prems lhs rhs =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   429
  rewrite_rule_extra_vars prems lhs rhs
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   430
    orelse
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   431
  is_Var (head_of lhs)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   432
    orelse
16305
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   433
(* turns t = x around, which causes a headache if x is a local variable -
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   434
   usually it is very useful :-(
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   435
  is_Free rhs andalso not(is_Free lhs) andalso not(Logic.occs(rhs,lhs))
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   436
  andalso not(exists_subterm is_Var lhs)
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   437
    orelse
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   438
*)
16842
wenzelm
parents: 16807
diff changeset
   439
  exists (fn t => Logic.occs (lhs, t)) (rhs :: prems)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   440
    orelse
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
   441
  null prems andalso Pattern.matches thy (lhs, rhs)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   442
    (*the condition "null prems" is necessary because conditional rewrites
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   443
      with extra variables in the conditions may terminate although
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   444
      the rhs is an instance of the lhs; example: ?m < ?n ==> f(?n) == f(?m)*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   445
    orelse
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   446
  is_Const lhs andalso not (is_Const rhs);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   447
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   448
fun decomp_simp thm =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   449
  let
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   450
    val {thy, prop, ...} = Thm.rep_thm thm;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   451
    val prems = Logic.strip_imp_prems prop;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   452
    val concl = Drule.strip_imp_concl (Thm.cprop_of thm);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   453
    val (lhs, rhs) = Drule.dest_equals concl handle TERM _ =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   454
      raise SIMPLIFIER ("Rewrite rule not a meta-equality", thm);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   455
    val (_, elhs) = Drule.dest_equals (Thm.cprop_of (Thm.eta_conversion lhs));
16665
b75568de32c6 decomp_simp: compare terms, not cterms;
wenzelm
parents: 16458
diff changeset
   456
    val elhs = if term_of elhs aconv term_of lhs then lhs else elhs;  (*share identical copies*)
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   457
    val erhs = Envir.eta_contract (term_of rhs);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   458
    val perm =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   459
      var_perm (term_of elhs, erhs) andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   460
      not (term_of elhs aconv erhs) andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   461
      not (is_Var (term_of elhs));
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   462
  in (thy, prems, term_of lhs, elhs, term_of rhs, perm) end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   463
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   464
fun decomp_simp' thm =
12979
4c76bce4ce39 decomp_simp': use lhs instead of elhs (preserves more bound variable names);
wenzelm
parents: 12783
diff changeset
   465
  let val (_, _, lhs, _, rhs, _) = decomp_simp thm in
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   466
    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
   467
    else (lhs, rhs)
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   468
  end;
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   469
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   470
fun mk_eq_True (Simpset (_, {mk_rews = {mk_eq_True, ...}, ...})) (thm, name) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   471
  (case mk_eq_True thm of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   472
    NONE => []
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   473
  | SOME eq_True =>
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   474
      let
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   475
        val (_, _, lhs, elhs, _, _) = decomp_simp eq_True;
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   476
        val extra = rrule_extra_vars elhs eq_True;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   477
      in [{thm = eq_True, name = name, lhs = lhs, elhs = elhs, perm = false}] end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   478
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   479
(*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
   480
  in case there are extra vars on the rhs*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   481
fun rrule_eq_True (thm, name, lhs, elhs, rhs, ss, thm2) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   482
  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
   483
    if rewrite_rule_extra_vars [] lhs rhs then
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   484
      mk_eq_True ss (thm2, name) @ [rrule]
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   485
    else [rrule]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   486
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   487
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   488
fun mk_rrule ss (thm, name) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   489
  let val (_, prems, lhs, elhs, rhs, perm) = decomp_simp thm in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   490
    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
   491
    else
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   492
      (*weak test for loops*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   493
      if rewrite_rule_extra_vars prems lhs rhs orelse is_Var (term_of elhs)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   494
      then mk_eq_True ss (thm, name)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   495
      else rrule_eq_True (thm, name, lhs, elhs, rhs, ss, thm)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   496
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   497
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   498
fun orient_rrule ss (thm, name) =
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   499
  let
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   500
    val (thy, prems, lhs, elhs, rhs, perm) = decomp_simp thm;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   501
    val Simpset (_, {mk_rews = {reorient, mk_sym, ...}, ...}) = ss;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   502
  in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   503
    if perm then [{thm = thm, name = name, lhs = lhs, elhs = elhs, perm = true}]
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   504
    else if reorient thy prems lhs rhs then
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   505
      if reorient thy prems rhs lhs
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   506
      then mk_eq_True ss (thm, name)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   507
      else
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   508
        (case mk_sym thm of
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   509
          NONE => []
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   510
        | SOME thm' =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   511
            let val (_, _, lhs', elhs', rhs', _) = decomp_simp thm'
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   512
            in rrule_eq_True (thm', name, lhs', elhs', rhs', ss, thm) end)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   513
    else rrule_eq_True (thm, name, lhs, elhs, rhs, ss, thm)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   514
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   515
15199
29ca1fe63e7b undoing previous change
nipkow
parents: 15195
diff changeset
   516
fun extract_rews (Simpset (_, {mk_rews = {mk, ...}, ...}), thms) =
19482
9f11af8f7ef9 tuned basic list operators (flat, maps, map_filter);
wenzelm
parents: 19303
diff changeset
   517
  maps (fn thm => map (rpair (Thm.name_of_thm thm)) (mk thm)) thms;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   518
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   519
fun extract_safe_rrules (ss, thm) =
19482
9f11af8f7ef9 tuned basic list operators (flat, maps, map_filter);
wenzelm
parents: 19303
diff changeset
   520
  maps (orient_rrule ss) (extract_rews (ss, [thm]));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   521
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   522
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   523
(* add/del rules explicitly *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   524
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   525
fun comb_simps comb mk_rrule (ss, thms) =
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   526
  let
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   527
    val rews = extract_rews (ss, thms);
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   528
  in fold (fold comb o mk_rrule) rews ss end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   529
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   530
fun ss addsimps thms =
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   531
  comb_simps insert_rrule (mk_rrule ss) (ss, thms);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   532
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   533
fun ss delsimps thms =
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   534
  comb_simps del_rrule (map mk_rrule2 o mk_rrule ss) (ss, thms);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   535
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   536
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   537
(* congs *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   538
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   539
fun cong_name (Const (a, _)) = SOME a
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   540
  | cong_name (Free (a, _)) = SOME ("Free: " ^ a)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   541
  | cong_name _ = NONE;
13835
12b2ffbe543a Change to meta simplifier: congruence rules may now have frees as head of term.
ballarin
parents: 13828
diff changeset
   542
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   543
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   544
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   545
fun is_full_cong_prems [] [] = true
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   546
  | is_full_cong_prems [] _ = false
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   547
  | is_full_cong_prems (p :: prems) varpairs =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   548
      (case Logic.strip_assums_concl p of
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   549
        Const ("==", _) $ lhs $ rhs =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   550
          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
   551
            is_Var x andalso forall is_Bound xs andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   552
            null (findrep xs) andalso xs = ys andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   553
            (x, y) mem varpairs andalso
19303
7da7e96bd74d gen_eq_set, remove (op =);
wenzelm
parents: 19142
diff changeset
   554
            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
   555
          end
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   556
      | _ => false);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   557
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   558
fun is_full_cong thm =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   559
  let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   560
    val prems = prems_of thm and concl = concl_of thm;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   561
    val (lhs, rhs) = Logic.dest_equals concl;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   562
    val (f, xs) = strip_comb lhs and (g, ys) = strip_comb rhs;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   563
  in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   564
    f = g andalso null (findrep (xs @ ys)) andalso length xs = length ys andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   565
    is_full_cong_prems prems (xs ~~ ys)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   566
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   567
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   568
fun add_cong (ss, thm) = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   569
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   570
    let
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   571
      val (lhs, _) = Drule.dest_equals (Drule.strip_imp_concl (Thm.cprop_of thm))
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   572
        handle TERM _ => raise SIMPLIFIER ("Congruence not a meta-equality", thm);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   573
    (*val lhs = Envir.eta_contract lhs;*)
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
   574
      val a = the (cong_name (head_of (term_of lhs))) handle Option.Option =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   575
        raise SIMPLIFIER ("Congruence must start with a constant or free variable", thm);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   576
      val (alist, weak) = congs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   577
      val alist2 = overwrite_warn (alist, (a, {lhs = lhs, thm = thm}))
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   578
        ("Overwriting congruence rule for " ^ quote a);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   579
      val weak2 = if is_full_cong thm then weak else a :: weak;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   580
    in ((alist2, weak2), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   581
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   582
fun del_cong (ss, thm) = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   583
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   584
    let
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   585
      val (lhs, _) = Logic.dest_equals (Thm.concl_of thm) handle TERM _ =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   586
        raise SIMPLIFIER ("Congruence not a meta-equality", thm);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   587
    (*val lhs = Envir.eta_contract lhs;*)
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
   588
      val a = the (cong_name (head_of lhs)) handle Option.Option =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   589
        raise SIMPLIFIER ("Congruence must start with a constant", thm);
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   590
      val (alist, _) = congs;
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   591
      val alist2 = List.filter (fn (x, _) => x <> a) alist;
19482
9f11af8f7ef9 tuned basic list operators (flat, maps, map_filter);
wenzelm
parents: 19303
diff changeset
   592
      val weak2 = alist2 |> map_filter (fn (a, {thm, ...}: cong) =>
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   593
        if is_full_cong thm then NONE else SOME a);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   594
    in ((alist2, weak2), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   595
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   596
fun mk_cong (Simpset (_, {mk_rews = {mk_cong = f, ...}, ...})) = f;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   597
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   598
in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   599
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   600
val (op addeqcongs) = Library.foldl add_cong;
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   601
val (op deleqcongs) = Library.foldl del_cong;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   602
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   603
fun ss addcongs congs = ss addeqcongs map (mk_cong ss) congs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   604
fun ss delcongs congs = ss deleqcongs map (mk_cong ss) congs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   605
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   606
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   607
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   608
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   609
(* simprocs *)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   610
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   611
local
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   612
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   613
fun add_proc (proc as Proc {name, lhs, ...}) ss =
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   614
 (trace_cterm false ("Adding simplification procedure " ^ quote name ^ " for") ss lhs;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   615
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   616
    (congs, Net.insert_term eq_proc (term_of lhs, proc) procs,
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   617
      mk_rews, termless, subgoal_tac, loop_tacs, solvers)) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   618
  handle Net.INSERT =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   619
    (warning ("Ignoring duplicate simplification procedure " ^ quote name); ss));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   620
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   621
fun del_proc (proc as Proc {name, lhs, ...}) ss =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   622
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   623
    (congs, Net.delete_term eq_proc (term_of lhs, proc) procs,
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   624
      mk_rews, termless, subgoal_tac, loop_tacs, solvers)) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   625
  handle Net.DELETE =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   626
    (warning ("Simplification procedure " ^ quote name ^ " not in simpset"); ss);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   627
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   628
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   629
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   630
fun ss addsimprocs ps = fold (fn Simproc procs => fold add_proc procs) ps ss;
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   631
fun ss delsimprocs ps = fold (fn Simproc procs => fold del_proc procs) ps ss;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   632
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   633
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   634
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   635
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   636
(* mk_rews *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   637
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   638
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   639
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   640
fun map_mk_rews f = map_simpset2 (fn (congs, procs, {mk, mk_cong, mk_sym, mk_eq_True, reorient},
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   641
      termless, subgoal_tac, loop_tacs, solvers) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   642
  let
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   643
    val (mk', mk_cong', mk_sym', mk_eq_True', reorient') =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   644
      f (mk, mk_cong, mk_sym, mk_eq_True, reorient);
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   645
    val mk_rews' = {mk = mk', mk_cong = mk_cong', mk_sym = mk_sym', mk_eq_True = mk_eq_True',
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   646
      reorient = reorient'};
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   647
  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
   648
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   649
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   650
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   651
fun ss setmksimps mk = ss |> map_mk_rews (fn (_, mk_cong, mk_sym, mk_eq_True, reorient) =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   652
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   653
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   654
fun ss setmkcong mk_cong = ss |> map_mk_rews (fn (mk, _, mk_sym, mk_eq_True, reorient) =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   655
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   656
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   657
fun ss setmksym mk_sym = ss |> map_mk_rews (fn (mk, mk_cong, _, mk_eq_True, reorient) =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   658
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   659
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   660
fun ss setmkeqTrue mk_eq_True = ss |> map_mk_rews (fn (mk, mk_cong, mk_sym, _, reorient) =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   661
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   662
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   663
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
   664
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   665
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   666
end;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   667
14242
ec70653a02bf Added access to the mk_rews field (and friends).
skalberg
parents: 14040
diff changeset
   668
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   669
(* termless *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   670
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   671
fun ss settermless termless = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   672
  map_simpset2 (fn (congs, procs, mk_rews, _, subgoal_tac, loop_tacs, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   673
   (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
   674
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   675
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   676
(* tactics *)
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   677
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   678
fun ss setsubgoaler subgoal_tac = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   679
  map_simpset2 (fn (congs, procs, mk_rews, termless, _, loop_tacs, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   680
   (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
   681
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   682
fun ss setloop' tac = ss |>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   683
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, _, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   684
   (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
   685
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   686
fun ss setloop tac = ss setloop' (K tac);
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   687
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   688
fun ss addloop' (name, tac) = ss |>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   689
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   690
    (congs, procs, mk_rews, termless, subgoal_tac,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   691
      overwrite_warn (loop_tacs, (name, tac)) ("Overwriting looper " ^ quote name),
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   692
      solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   693
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   694
fun ss addloop (name, tac) = ss addloop' (name, K tac);
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   695
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   696
fun ss delloop name = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   697
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
17756
d4a35f82fbb4 minor tweaks for Poplog/ML;
wenzelm
parents: 17723
diff changeset
   698
    let val loop_tacs' = filter_out (equal name o fst) loop_tacs in
15034
e1282c4b39be improved print_ss; tuned;
wenzelm
parents: 15023
diff changeset
   699
      if length loop_tacs <> length loop_tacs' then ()
e1282c4b39be improved print_ss; tuned;
wenzelm
parents: 15023
diff changeset
   700
      else warning ("No such looper in simpset: " ^ quote name);
e1282c4b39be improved print_ss; tuned;
wenzelm
parents: 15023
diff changeset
   701
      (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
   702
    end);
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   703
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   704
fun ss setSSolver solver = ss |> map_simpset2 (fn (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   705
  subgoal_tac, loop_tacs, (unsafe_solvers, _)) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   706
    (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
   707
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   708
fun ss addSSolver solver = ss |> map_simpset2 (fn (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   709
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   710
    subgoal_tac, loop_tacs, (unsafe_solvers, merge_solvers solvers [solver])));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   711
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   712
fun ss setSolver solver = ss |> map_simpset2 (fn (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   713
  subgoal_tac, loop_tacs, (_, solvers)) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   714
    subgoal_tac, loop_tacs, ([solver], solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   715
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   716
fun ss addSolver solver = ss |> map_simpset2 (fn (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   717
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   718
    subgoal_tac, loop_tacs, (merge_solvers unsafe_solvers [solver], solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   719
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   720
fun set_solvers solvers = map_simpset2 (fn (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   721
  subgoal_tac, loop_tacs, _) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   722
  subgoal_tac, loop_tacs, (solvers, solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   723
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   724
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   725
(* empty *)
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   726
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   727
fun init_ss mk_rews termless subgoal_tac solvers =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   728
  make_simpset ((Net.empty, [], (0, []), NONE),
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   729
    (([], []), Net.empty, mk_rews, termless, subgoal_tac, [], solvers));
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   730
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   731
fun clear_ss (ss as Simpset (_, {mk_rews, termless, subgoal_tac, solvers, ...})) =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   732
  init_ss mk_rews termless subgoal_tac solvers
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   733
  |> inherit_context ss;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   734
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   735
val basic_mk_rews: mk_rews =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   736
 {mk = fn th => if can Logic.dest_equals (Thm.concl_of th) then [th] else [],
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   737
  mk_cong = I,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   738
  mk_sym = SOME o Drule.symmetric_fun,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   739
  mk_eq_True = K NONE,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   740
  reorient = default_reorient};
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   741
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   742
val empty_ss = init_ss basic_mk_rews Term.termless (K (K no_tac)) ([], []);
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   743
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   744
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   745
(* merge *)  (*NOTE: ignores some fields of 2nd simpset*)
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   746
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   747
fun merge_ss (ss1, ss2) =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   748
  let
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   749
    val Simpset ({rules = rules1, prems = prems1, bounds = bounds1, context = _},
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   750
     {congs = (congs1, weak1), procs = procs1, mk_rews, termless, subgoal_tac,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   751
      loop_tacs = loop_tacs1, solvers = (unsafe_solvers1, solvers1)}) = ss1;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   752
    val Simpset ({rules = rules2, prems = prems2, bounds = bounds2, context = _},
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   753
     {congs = (congs2, weak2), procs = procs2, mk_rews = _, termless = _, subgoal_tac = _,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   754
      loop_tacs = loop_tacs2, solvers = (unsafe_solvers2, solvers2)}) = ss2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   755
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   756
    val rules' = Net.merge eq_rrule (rules1, rules2);
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   757
    val prems' = gen_merge_lists Drule.eq_thm_prop prems1 prems2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   758
    val bounds' = if #1 bounds1 < #1 bounds2 then bounds2 else bounds1;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   759
    val congs' = gen_merge_lists (eq_cong o pairself #2) congs1 congs2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   760
    val weak' = merge_lists weak1 weak2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   761
    val procs' = Net.merge eq_proc (procs1, procs2);
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   762
    val loop_tacs' = merge_alists loop_tacs1 loop_tacs2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   763
    val unsafe_solvers' = merge_solvers unsafe_solvers1 unsafe_solvers2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   764
    val solvers' = merge_solvers solvers1 solvers2;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   765
  in
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   766
    make_simpset ((rules', prems', bounds', NONE), ((congs', weak'), procs',
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   767
      mk_rews, termless, subgoal_tac, loop_tacs', (unsafe_solvers', solvers')))
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   768
  end;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   769
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   770
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   771
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   772
(** rewriting **)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   773
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   774
(*
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   775
  Uses conversions, see:
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   776
    L C Paulson, A higher-order implementation of rewriting,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   777
    Science of Computer Programming 3 (1983), pages 119-149.
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   778
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   779
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   780
val dest_eq = Drule.dest_equals o Thm.cprop_of;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   781
val lhs_of = #1 o dest_eq;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   782
val rhs_of = #2 o dest_eq;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   783
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   784
fun check_conv msg ss thm thm' =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   785
  let
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   786
    val thm'' = transitive thm (transitive
15001
fb2141a9f8c0 Moved conversion rules from MetaSimplifier to Drule. refl_implies removed
skalberg
parents: 14981
diff changeset
   787
      (symmetric (Drule.beta_eta_conversion (lhs_of thm'))) thm')
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   788
  in if msg then trace_thm "SUCCEEDED" ss thm' else (); SOME thm'' end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   789
  handle THM _ =>
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   790
    let val {thy, prop = _ $ _ $ prop0, ...} = Thm.rep_thm thm in
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   791
      trace_thm "Proved wrong thm (Check subgoaler?)" ss thm';
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   792
      trace_term false "Should have proved:" ss thy prop0;
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   793
      NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   794
    end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   795
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   796
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   797
(* mk_procrule *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   798
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   799
fun mk_procrule ss thm =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   800
  let val (_, prems, lhs, elhs, rhs, _) = decomp_simp thm in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   801
    if rewrite_rule_extra_vars prems lhs rhs
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   802
    then (warn_thm "Extra vars on rhs:" ss thm; [])
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   803
    else [mk_rrule2 {thm = thm, name = "", lhs = lhs, elhs = elhs, perm = false}]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   804
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   805
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   806
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   807
(* rewritec: conversion to apply the meta simpset to a term *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   808
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   809
(*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
   810
  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
   811
  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
   812
  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
   813
  already in normal form.
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   814
  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
   815
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   816
val skel0 = Bound 0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   817
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   818
(*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
   819
  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
   820
  in the lhs.*)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   821
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   822
fun uncond_skel ((_, weak), (lhs, rhs)) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   823
  if null weak then rhs  (*optimization*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   824
  else if exists_Const (fn (c, _) => c mem weak) lhs then skel0
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   825
  else rhs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   826
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   827
(*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
   828
  Otherwise those vars may become instantiated with unnormalized terms
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   829
  while the premises are solved.*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   830
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   831
fun cond_skel (args as (congs, (lhs, rhs))) =
20197
ffc64d90fc1f use Term.add_vars instead of obsolete term_varnames;
wenzelm
parents: 20146
diff changeset
   832
  if Term.add_vars rhs [] subset Term.add_vars lhs [] then uncond_skel args
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   833
  else skel0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   834
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   835
(*
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   836
  Rewriting -- we try in order:
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   837
    (1) beta reduction
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   838
    (2) unconditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   839
    (3) conditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   840
    (4) simplification procedures
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   841
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   842
  IMPORTANT: rewrite rules must not introduce new Vars or TVars!
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   843
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   844
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   845
fun rewritec (prover, thyt, maxt) ss t =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   846
  let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   847
    val Simpset ({rules, ...}, {congs, procs, termless, ...}) = ss;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   848
    val eta_thm = Thm.eta_conversion t;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   849
    val eta_t' = rhs_of eta_thm;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   850
    val eta_t = term_of eta_t';
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   851
    fun rew {thm, name, lhs, elhs, extra, fo, perm} =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   852
      let
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   853
        val {thy, prop, maxidx, ...} = rep_thm thm;
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   854
        val (rthm, elhs') =
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   855
          if maxt = ~1 orelse not extra then (thm, elhs)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   856
          else (Thm.incr_indexes (maxt+1) thm, Thm.cterm_incr_indexes (maxt+1) elhs);
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   857
        val insts = if fo then Thm.cterm_first_order_match (elhs', eta_t')
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   858
                          else Thm.cterm_match (elhs', eta_t');
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   859
        val thm' = Thm.instantiate insts (Thm.rename_boundvars lhs eta_t rthm);
14643
wenzelm
parents: 14330
diff changeset
   860
        val prop' = Thm.prop_of thm';
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   861
        val unconditional = (Logic.count_prems (prop',0) = 0);
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   862
        val (lhs', rhs') = Logic.dest_equals (Logic.strip_imp_concl prop')
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   863
      in
11295
66925f23ac7f improved tracing of permutative rules.
nipkow
parents: 11291
diff changeset
   864
        if perm andalso not (termless (rhs', lhs'))
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   865
        then (trace_named_thm "Cannot apply permutative rewrite rule" ss (thm, name);
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   866
              trace_thm "Term does not become smaller:" ss thm'; NONE)
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   867
        else (trace_named_thm "Applying instance of rewrite rule" ss (thm, name);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   868
           if unconditional
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   869
           then
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   870
             (trace_thm "Rewriting:" ss thm';
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   871
              let val lr = Logic.dest_equals prop;
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   872
                  val SOME thm'' = check_conv false ss eta_thm thm'
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   873
              in SOME (thm'', uncond_skel (congs, lr)) end)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   874
           else
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   875
             (trace_thm "Trying to rewrite:" ss thm';
16042
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   876
              if !simp_depth > !simp_depth_limit
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   877
              then let val s = "simp_depth_limit exceeded - giving up"
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   878
                   in trace false s; warning s; NONE end
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   879
              else
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   880
              case prover ss thm' of
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   881
                NONE => (trace_thm "FAILED" ss thm'; NONE)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   882
              | SOME thm2 =>
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   883
                  (case check_conv true ss eta_thm thm2 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   884
                     NONE => NONE |
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   885
                     SOME thm2' =>
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   886
                       let val concl = Logic.strip_imp_concl prop
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   887
                           val lr = Logic.dest_equals concl
16042
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   888
                       in SOME (thm2', cond_skel (congs, lr)) end)))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   889
      end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   890
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   891
    fun rews [] = NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   892
      | rews (rrule :: rrules) =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   893
          let val opt = rew rrule handle Pattern.MATCH => NONE
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   894
          in case opt of NONE => rews rrules | some => some end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   895
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   896
    fun sort_rrules rrs = let
14643
wenzelm
parents: 14330
diff changeset
   897
      fun is_simple({thm, ...}:rrule) = case Thm.prop_of thm of
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   898
                                      Const("==",_) $ _ $ _ => true
12603
7d2bca103101 tuned tracing markup;
wenzelm
parents: 12285
diff changeset
   899
                                      | _                   => false
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   900
      fun sort []        (re1,re2) = re1 @ re2
12603
7d2bca103101 tuned tracing markup;
wenzelm
parents: 12285
diff changeset
   901
        | sort (rr::rrs) (re1,re2) = if is_simple rr
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   902
                                     then sort rrs (rr::re1,re2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   903
                                     else sort rrs (re1,rr::re2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   904
    in sort rrs ([],[]) end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   905
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   906
    fun proc_rews [] = NONE
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   907
      | proc_rews (Proc {name, proc, lhs, ...} :: ps) =
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
   908
          if Pattern.matches thyt (Thm.term_of lhs, Thm.term_of t) then
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   909
            (debug_term false ("Trying procedure " ^ quote name ^ " on:") ss thyt eta_t;
13486
54464ea94d6f exception SIMPROC_FAIL: solid error reporting of simprocs;
wenzelm
parents: 13458
diff changeset
   910
             case transform_failure (curry SIMPROC_FAIL name)
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   911
                 (fn () => proc thyt ss eta_t) () of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   912
               NONE => (debug false "FAILED"; proc_rews ps)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   913
             | SOME raw_thm =>
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   914
                 (trace_thm ("Procedure " ^ quote name ^ " produced rewrite rule:") ss raw_thm;
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   915
                  (case rews (mk_procrule ss raw_thm) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   916
                    NONE => (trace_cterm true ("IGNORED result of simproc " ^ quote name ^
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   917
                      " -- does not match") ss t; proc_rews ps)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   918
                  | some => some)))
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   919
          else proc_rews ps;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   920
  in case eta_t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   921
       Abs _ $ _ => SOME (transitive eta_thm
12155
13c5469b4bb3 congc now returns None if congruence rule has no effect.
berghofe
parents: 11886
diff changeset
   922
         (beta_conversion false eta_t'), skel0)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   923
     | _ => (case rews (sort_rrules (Net.match_term rules eta_t)) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   924
               NONE => proc_rews (Net.match_term procs eta_t)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   925
             | some => some)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   926
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   927
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   928
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   929
(* conversion to apply a congruence rule to a term *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   930
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   931
fun congc prover ss maxt {thm=cong,lhs=lhs} t =
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   932
  let val rthm = Thm.incr_indexes (maxt+1) cong;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   933
      val rlhs = fst (Drule.dest_equals (Drule.strip_imp_concl (cprop_of rthm)));
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   934
      val insts = Thm.cterm_match (rlhs, t)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   935
      (* Pattern.match can raise Pattern.MATCH;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   936
         is handled when congc is called *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   937
      val thm' = Thm.instantiate insts (Thm.rename_boundvars (term_of rlhs) (term_of t) rthm);
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   938
      val unit = trace_thm "Applying congruence rule:" ss thm';
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   939
      fun err (msg, thm) = (trace_thm msg ss thm; NONE)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   940
  in case prover thm' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   941
       NONE => err ("Congruence proof failed.  Could not prove", thm')
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   942
     | SOME thm2 => (case check_conv true ss (Drule.beta_eta_conversion t) thm2 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   943
          NONE => err ("Congruence proof failed.  Should not have proved", thm2)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   944
        | SOME thm2' =>
12155
13c5469b4bb3 congc now returns None if congruence rule has no effect.
berghofe
parents: 11886
diff changeset
   945
            if op aconv (pairself term_of (dest_equals (cprop_of thm2')))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   946
            then NONE else SOME thm2')
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   947
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   948
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   949
val (cA, (cB, cC)) =
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   950
  apsnd dest_equals (dest_implies (hd (cprems_of Drule.imp_cong)));
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   951
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   952
fun transitive1 NONE NONE = NONE
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   953
  | transitive1 (SOME thm1) NONE = SOME thm1
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   954
  | transitive1 NONE (SOME thm2) = SOME thm2
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   955
  | transitive1 (SOME thm1) (SOME thm2) = SOME (transitive thm1 thm2)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   956
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   957
fun transitive2 thm = transitive1 (SOME thm);
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   958
fun transitive3 thm = transitive1 thm o SOME;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
   959
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   960
fun bottomc ((simprem, useprem, mutsimp), prover, thy, maxidx) =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   961
  let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   962
    fun botc skel ss t =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   963
          if is_Var skel then NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   964
          else
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   965
          (case subc skel ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   966
             some as SOME thm1 =>
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   967
               (case rewritec (prover, thy, maxidx) ss (rhs_of thm1) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   968
                  SOME (thm2, skel2) =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
   969
                    transitive2 (transitive thm1 thm2)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   970
                      (botc skel2 ss (rhs_of thm2))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   971
                | NONE => some)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   972
           | NONE =>
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   973
               (case rewritec (prover, thy, maxidx) ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   974
                  SOME (thm2, skel2) => transitive2 thm2
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   975
                    (botc skel2 ss (rhs_of thm2))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   976
                | NONE => NONE))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   977
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   978
    and try_botc ss t =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   979
          (case botc skel0 ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   980
             SOME trec1 => trec1 | NONE => (reflexive t))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   981
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   982
    and subc skel (ss as Simpset ({bounds, ...}, {congs, ...})) t0 =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   983
       (case term_of t0 of
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   984
           Abs (a, T, t) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   985
             let
20079
ec5c8584487c replaced Term.variant(list) by Name.variant(_list);
wenzelm
parents: 20057
diff changeset
   986
                 val b = Name.bound (#1 bounds);
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   987
                 val (v, t') = Thm.dest_abs (SOME b) t0;
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   988
                 val b' = #1 (Term.dest_Free (Thm.term_of v));
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   989
                 val _ = conditional (b <> b') (fn () =>
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   990
                   warning ("Simplifier: renamed bound variable " ^ quote b ^ " to " ^ quote b'));
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
   991
                 val ss' = add_bound ((b', T), a) ss;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   992
                 val skel' = case skel of Abs (_, _, sk) => sk | _ => skel0;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   993
             in case botc skel' ss' t' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   994
                  SOME thm => SOME (abstract_rule a v thm)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   995
                | NONE => NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   996
             end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   997
         | t $ _ => (case t of
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   998
             Const ("==>", _) $ _  => impc t0 ss
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   999
           | Abs _ =>
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1000
               let val thm = beta_conversion false t0
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1001
               in case subc skel0 ss (rhs_of thm) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1002
                    NONE => SOME thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1003
                  | SOME thm' => SOME (transitive thm thm')
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1004
               end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1005
           | _  =>
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1006
               let fun appc () =
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1007
                     let
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1008
                       val (tskel, uskel) = case skel of
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1009
                           tskel $ uskel => (tskel, uskel)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1010
                         | _ => (skel0, skel0);
10767
8fa4aafa7314 Thm: dest_comb, dest_abs, capply, cabs no longer global;
wenzelm
parents: 10413
diff changeset
  1011
                       val (ct, cu) = Thm.dest_comb t0
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1012
                     in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1013
                     (case botc tskel ss ct of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1014
                        SOME thm1 =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1015
                          (case botc uskel ss cu of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1016
                             SOME thm2 => SOME (combination thm1 thm2)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1017
                           | NONE => SOME (combination thm1 (reflexive cu)))
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1018
                      | NONE =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1019
                          (case botc uskel ss cu of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1020
                             SOME thm1 => SOME (combination (reflexive ct) thm1)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1021
                           | NONE => NONE))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1022
                     end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1023
                   val (h, ts) = strip_comb t
13835
12b2ffbe543a Change to meta simplifier: congruence rules may now have frees as head of term.
ballarin
parents: 13828
diff changeset
  1024
               in case cong_name h of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1025
                    SOME a =>
17232
148c241d2492 some 'assoc' etc. refactoring
haftmann
parents: 17203
diff changeset
  1026
                      (case AList.lookup (op =) (fst congs) a of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1027
                         NONE => appc ()
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1028
                       | SOME cong =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1029
  (*post processing: some partial applications h t1 ... tj, j <= length ts,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1030
    may be a redex. Example: map (%x. x) = (%xs. xs) wrt map_cong*)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1031
                          (let
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
  1032
                             val thm = congc (prover ss) ss maxidx cong t0;
19502
wenzelm
parents: 19482
diff changeset
  1033
                             val t = the_default t0 (Option.map rhs_of thm);
10767
8fa4aafa7314 Thm: dest_comb, dest_abs, capply, cabs no longer global;
wenzelm
parents: 10413
diff changeset
  1034
                             val (cl, cr) = Thm.dest_comb t
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1035
                             val dVar = Var(("", 0), dummyT)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1036
                             val skel =
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1037
                               list_comb (h, replicate (length ts) dVar)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1038
                           in case botc skel ss cl of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1039
                                NONE => thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1040
                              | SOME thm' => transitive3 thm
12155
13c5469b4bb3 congc now returns None if congruence rule has no effect.
berghofe
parents: 11886
diff changeset
  1041
                                  (combination thm' (reflexive cr))
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
  1042
                           end handle Pattern.MATCH => appc ()))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1043
                  | _ => appc ()
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1044
               end)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1045
         | _ => NONE)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1046
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1047
    and impc ct ss =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1048
      if mutsimp then mut_impc0 [] ct [] [] ss else nonmut_impc ct ss
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1049
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1050
    and rules_of_prem ss prem =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1051
      if maxidx_of_term (term_of prem) <> ~1
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1052
      then (trace_cterm true
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
  1053
        "Cannot add premise as rewrite rule because it contains (type) unknowns:" ss prem; ([], NONE))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1054
      else
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1055
        let val asm = assume prem
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1056
        in (extract_safe_rrules (ss, asm), SOME asm) end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1057
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1058
    and add_rrules (rrss, asms) ss =
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
  1059
      (fold o fold) insert_rrule rrss ss |> add_prems (map_filter I asms)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1060
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1061
    and disch r (prem, eq) =
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1062
      let
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1063
        val (lhs, rhs) = dest_eq eq;
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1064
        val eq' = implies_elim (Thm.instantiate
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1065
          ([], [(cA, prem), (cB, lhs), (cC, rhs)]) Drule.imp_cong)
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1066
          (implies_intr prem eq)
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1067
      in if not r then eq' else
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1068
        let
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1069
          val (prem', concl) = dest_implies lhs;
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1070
          val (prem'', _) = dest_implies rhs
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1071
        in transitive (transitive
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1072
          (Thm.instantiate ([], [(cA, prem'), (cB, prem), (cC, concl)])
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1073
             Drule.swap_prems_eq) eq')
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1074
          (Thm.instantiate ([], [(cA, prem), (cB, prem''), (cC, concl)])
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1075
             Drule.swap_prems_eq)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1076
        end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1077
      end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1078
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1079
    and rebuild [] _ _ _ _ eq = eq
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1080
      | rebuild (prem :: prems) concl (rrs :: rrss) (asm :: asms) ss eq =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1081
          let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1082
            val ss' = add_rrules (rev rrss, rev asms) ss;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1083
            val concl' =
19502
wenzelm
parents: 19482
diff changeset
  1084
              Drule.mk_implies (prem, the_default concl (Option.map rhs_of eq));
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1085
            val dprem = Option.map (curry (disch false) prem)
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
  1086
          in case rewritec (prover, thy, maxidx) ss' concl' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1087
              NONE => rebuild prems concl' rrss asms ss (dprem eq)
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1088
            | SOME (eq', _) => transitive2 (Library.foldl (disch false o swap)
19502
wenzelm
parents: 19482
diff changeset
  1089
                  (the (transitive3 (dprem eq) eq'), prems))
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1090
                (mut_impc0 (rev prems) (rhs_of eq') (rev rrss) (rev asms) ss)
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1091
          end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1092
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1093
    and mut_impc0 prems concl rrss asms ss =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1094
      let
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1095
        val prems' = strip_imp_prems concl;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1096
        val (rrss', asms') = split_list (map (rules_of_prem ss) prems')
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1097
      in mut_impc (prems @ prems') (strip_imp_concl concl) (rrss @ rrss')
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1098
        (asms @ asms') [] [] [] [] ss ~1 ~1
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1099
      end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1100
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1101
    and mut_impc [] concl [] [] prems' rrss' asms' eqns ss changed k =
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1102
        transitive1 (Library.foldl (fn (eq2, (eq1, prem)) => transitive1 eq1
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1103
            (Option.map (curry (disch false) prem) eq2)) (NONE, eqns ~~ prems'))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1104
          (if changed > 0 then
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1105
             mut_impc (rev prems') concl (rev rrss') (rev asms')
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1106
               [] [] [] [] ss ~1 changed
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1107
           else rebuild prems' concl rrss' asms' ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1108
             (botc skel0 (add_rrules (rev rrss', rev asms') ss) concl))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1109
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1110
      | mut_impc (prem :: prems) concl (rrs :: rrss) (asm :: asms)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1111
          prems' rrss' asms' eqns ss changed k =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1112
        case (if k = 0 then NONE else botc skel0 (add_rrules
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1113
          (rev rrss' @ rrss, rev asms' @ asms) ss) prem) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1114
            NONE => mut_impc prems concl rrss asms (prem :: prems')
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1115
              (rrs :: rrss') (asm :: asms') (NONE :: eqns) ss changed
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1116
              (if k = 0 then 0 else k - 1)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1117
          | SOME eqn =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1118
            let
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1119
              val prem' = rhs_of eqn;
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1120
              val tprems = map term_of prems;
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1121
              val i = 1 + Library.foldl Int.max (~1, map (fn p =>
19618
wenzelm
parents: 19502
diff changeset
  1122
                find_index (fn q => q aconv p) tprems) (#hyps (rep_thm eqn)));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1123
              val (rrs', asm') = rules_of_prem ss prem'
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1124
            in mut_impc prems concl rrss asms (prem' :: prems')
15574
b1d1b5bfc464 Removed practically all references to Library.foldr.
skalberg
parents: 15570
diff changeset
  1125
              (rrs' :: rrss') (asm' :: asms') (SOME (foldr (disch true)
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1126
                (Drule.imp_cong_rule eqn (reflexive (Drule.list_implies
15574
b1d1b5bfc464 Removed practically all references to Library.foldr.
skalberg
parents: 15570
diff changeset
  1127
                  (Library.drop (i, prems), concl)))) (Library.take (i, prems))) :: eqns) ss (length prems') ~1
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1128
            end
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1129
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1130
     (*legacy code - only for backwards compatibility*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1131
     and nonmut_impc ct ss =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1132
       let val (prem, conc) = dest_implies ct;
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1133
           val thm1 = if simprem then botc skel0 ss prem else NONE;
19502
wenzelm
parents: 19482
diff changeset
  1134
           val prem1 = the_default prem (Option.map rhs_of thm1);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1135
           val ss1 = if not useprem then ss else add_rrules
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1136
             (apsnd single (apfst single (rules_of_prem ss prem1))) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1137
       in (case botc skel0 ss1 conc of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1138
           NONE => (case thm1 of
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1139
               NONE => NONE
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1140
             | SOME thm1' => SOME (Drule.imp_cong_rule thm1' (reflexive conc)))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1141
         | SOME thm2 =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1142
           let val thm2' = disch false (prem1, thm2)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1143
           in (case thm1 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1144
               NONE => SOME thm2'
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1145
             | SOME thm1' =>
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1146
                 SOME (transitive (Drule.imp_cong_rule thm1' (reflexive conc)) thm2'))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1147
           end)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1148
       end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1149
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1150
 in try_botc end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1151
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1152
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1153
(* Meta-rewriting: rewrites t to u and returns the theorem t==u *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1154
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1155
(*
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1156
  Parameters:
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1157
    mode = (simplify A,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1158
            use A in simplifying B,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1159
            use prems of B (if B is again a meta-impl.) to simplify A)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1160
           when simplifying A ==> B
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1161
    prover: how to solve premises in conditional rewrites and congruences
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1162
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1163
17705
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1164
val debug_bounds = ref false;
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1165
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1166
fun check_bounds ss ct = conditional (! debug_bounds) (fn () =>
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1167
  let
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1168
    val Simpset ({bounds = (_, bounds), ...}, _) = ss;
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1169
    val bs = fold_aterms (fn Free (x, _) =>
20079
ec5c8584487c replaced Term.variant(list) by Name.variant(_list);
wenzelm
parents: 20057
diff changeset
  1170
        if Name.is_bound x andalso not (AList.defined eq_bound bounds x)
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1171
        then insert (op =) x else I
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1172
      | _ => I) (term_of ct) [];
17705
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1173
  in
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1174
    if null bs then ()
17723
ee5b42e3cbb4 export debug_bounds;
wenzelm
parents: 17714
diff changeset
  1175
    else print_term true ("Simplifier: term contains loose bounds: " ^ commas_quote bs) ss
17705
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1176
      (Thm.theory_of_cterm ct) (Thm.term_of ct)
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1177
  end);
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1178
19052
113dbd65319e rewrite_cterm: Thm.adjust_maxidx prevents unnecessary increments on rules;
wenzelm
parents: 18929
diff changeset
  1179
fun rewrite_cterm mode prover raw_ss raw_ct =
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1180
  let
20260
990dbc007ca6 Thm.adjust_maxidx;
wenzelm
parents: 20228
diff changeset
  1181
    val ct = Thm.adjust_maxidx_cterm ~1 raw_ct;
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1182
    val {thy, t, maxidx, ...} = Thm.rep_cterm ct;
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1183
    val ss = fallback_context thy raw_ss;
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1184
    val _ = inc simp_depth;
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1185
    val _ = conditional (!simp_depth mod 20 = 0) (fn () =>
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1186
      warning ("Simplification depth " ^ string_of_int (! simp_depth)));
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1187
    val _ = trace_cterm false "SIMPLIFIER INVOKED ON THE FOLLOWING TERM:" ss ct;
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1188
    val _ = check_bounds ss ct;
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1189
    val res = bottomc (mode, Option.map Drule.flexflex_unique oo prover, thy, maxidx) ss ct
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1190
  in dec simp_depth; res end
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
  1191
  handle exn => (dec simp_depth; raise exn);  (* FIXME avoid handling of generic exceptions *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1192
11760
wenzelm
parents: 11737
diff changeset
  1193
(*Rewrite a cterm*)
17897
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1194
fun rewrite_aux _ _ [] ct = Thm.reflexive ct
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1195
  | rewrite_aux prover full thms ct =
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1196
      rewrite_cterm (full, false, false) prover
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1197
      (theory_context (Thm.theory_of_cterm ct) empty_ss addsimps thms) ct;
11672
8e75b78f33f3 full_rewrite_cterm_aux (see also tactic.ML);
wenzelm
parents: 11505
diff changeset
  1198
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1199
(*Rewrite a theorem*)
17897
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1200
fun simplify_aux _ _ [] th = th
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1201
  | simplify_aux prover full thms th =
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1202
      Drule.fconv_rule (rewrite_cterm (full, false, false) prover
1733b4680fde renamed set_context to context;
wenzelm
parents: 17882
diff changeset
  1203
        (theory_context (Thm.theory_of_thm th) empty_ss addsimps thms)) th;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1204
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1205
(*simple term rewriting -- no proof*)
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
  1206
fun rewrite_term thy rules procs =
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
  1207
  Pattern.rewrite_term thy (map decomp_simp' rules) procs;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1208
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1209
fun rewrite_thm mode prover ss = Drule.fconv_rule (rewrite_cterm mode prover ss);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1210
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1211
(*Rewrite the subgoals of a proof state (represented by a theorem) *)
19142
99a72b8c9974 rewrite_goals_rule_aux: actually use prems if present;
wenzelm
parents: 19052
diff changeset
  1212
fun rewrite_goals_rule_aux prover thms th =
99a72b8c9974 rewrite_goals_rule_aux: actually use prems if present;
wenzelm
parents: 19052
diff changeset
  1213
  Drule.fconv_rule (Drule.goals_conv (K true) (rewrite_cterm (true, true, true) prover
99a72b8c9974 rewrite_goals_rule_aux: actually use prems if present;
wenzelm
parents: 19052
diff changeset
  1214
    (theory_context (Thm.theory_of_thm th) empty_ss addsimps thms))) th;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1215
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1216
(*Rewrite the subgoal of a proof state (represented by a theorem)*)
15011
35be762f58f9 Made simplification procedures simpset-aware.
skalberg
parents: 15006
diff changeset
  1217
fun rewrite_goal_rule mode prover ss i thm =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1218
  if 0 < i  andalso  i <= nprems_of thm
15011
35be762f58f9 Made simplification procedures simpset-aware.
skalberg
parents: 15006
diff changeset
  1219
  then Drule.fconv_rule (Drule.goals_conv (fn j => j=i) (rewrite_cterm mode prover ss)) thm
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1220
  else raise THM("rewrite_goal_rule",i,[thm]);
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1221
20228
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1222
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1223
(* HHF normal form: !! before ==>, outermost !! generalized *)
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1224
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1225
local
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1226
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1227
fun gen_norm_hhf ss =
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1228
  (not o Drule.is_norm_hhf o Thm.prop_of) ?
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1229
    Drule.fconv_rule (rewrite_cterm (true, false, false) (K (K NONE)) ss)
20260
990dbc007ca6 Thm.adjust_maxidx;
wenzelm
parents: 20228
diff changeset
  1230
  #> Thm.adjust_maxidx_thm ~1
20228
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1231
  #> Drule.gen_all;
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1232
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1233
val ss = theory_context ProtoPure.thy empty_ss addsimps [Drule.norm_hhf_eq];
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1234
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1235
in
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1236
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1237
val norm_hhf = gen_norm_hhf ss;
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1238
val norm_hhf_protect = gen_norm_hhf (ss addeqcongs [Drule.protect_cong]);
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1239
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1240
end;
e0f9e8a6556b moved Goal.norm_hhf(_protect) to meta_simplifier.ML (pervasive);
wenzelm
parents: 20197
diff changeset
  1241
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1242
end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1243
11672
8e75b78f33f3 full_rewrite_cterm_aux (see also tactic.ML);
wenzelm
parents: 11505
diff changeset
  1244
structure BasicMetaSimplifier: BASIC_META_SIMPLIFIER = MetaSimplifier;
8e75b78f33f3 full_rewrite_cterm_aux (see also tactic.ML);
wenzelm
parents: 11505
diff changeset
  1245
open BasicMetaSimplifier;