src/Pure/meta_simplifier.ML
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permissions -rw-r--r--
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(*  Title:      Pure/meta_simplifier.ML
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    Author:     Tobias Nipkow and Stefan Berghofer, TU Muenchen
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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 Unsynchronized.ref
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  val trace_simp: bool Unsynchronized.ref
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  val trace_simp_depth_limit: int Unsynchronized.ref
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  type rrule
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  val eq_rrule: rrule * rrule -> bool
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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 empty_ss: simpset
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  val merge_ss: simpset * simpset -> simpset
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  val dest_ss: simpset ->
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   {simps: (string * thm) list,
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    procs: (string * cterm list) list,
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    congs: (string * thm) list,
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    weak_congs: string list,
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    loopers: string list,
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    unsafe_solvers: string list,
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    safe_solvers: string list}
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  type simproc
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  val eq_simproc: simproc * simproc -> bool
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  val morph_simproc: morphism -> simproc -> simproc
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  val make_simproc: {name: string, lhss: cterm list,
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    proc: morphism -> simpset -> cterm -> thm option, identifier: thm list} -> simproc
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  val mk_simproc: string -> cterm list -> (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 mksimps: simpset -> thm -> thm list
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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 rewrite_rule: thm list -> thm -> thm
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  val rewrite_goals_rule: thm list -> thm -> thm
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  val rewrite_goals_tac: thm list -> tactic
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  val rewrite_goal_tac: thm list -> int -> tactic
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  val rewtac: thm -> tactic
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  val prune_params_tac: tactic
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  val fold_rule: thm list -> thm -> thm
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  val fold_goals_tac: thm list -> tactic
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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 internal_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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    depth: int * bool Unsynchronized.ref,
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    context: Proof.context option} *
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   {congs: (string * thm) 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 add_simp: thm -> simpset -> simpset
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  val del_simp: thm -> simpset -> simpset
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  val solver: simpset -> solver -> int -> tactic
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  val simp_depth_limit_value: Config.value Config.T
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  val simp_depth_limit: int Config.T
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  val clear_ss: simpset -> simpset
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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 Unsynchronized.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 -> (simpset -> thm -> thm option) -> simpset -> conv
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  val rewrite_term: theory -> thm list -> (term -> term option) list -> term -> term
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  val rewrite_thm: bool * bool * bool ->
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    (simpset -> thm -> thm option) -> simpset -> 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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  val asm_rewrite_goal_tac: bool * bool * bool ->
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    (simpset -> tactic) -> simpset -> int -> tactic
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  val rewrite: bool -> thm list -> conv
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  val simplify: bool -> thm list -> 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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  Thm.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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    depth: simp_depth and exceeded flag;
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    congs: association list of congruence rules and
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           a list of `weak' congruence constants.
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           A congruence is `weak' if it avoids normalization of some argument.
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    procs: discrimination net of simplification procedures
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      (functions that prove rewrite rules on the fly);
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    mk_rews:
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      mk: turn simplification thms into rewrite rules;
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      mk_cong: prepare congruence rules;
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      mk_sym: turn == around;
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      mk_eq_True: turn P into P == True;
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    termless: relation for ordered rewriting;*)
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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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    depth: int * bool Unsynchronized.ref,
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    context: Proof.context option} *
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   {congs: (string * thm) 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: simpset -> cterm -> thm option,
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    id: stamp * thm list}
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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 internal_ss (Simpset args) = args;
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fun make_ss1 (rules, prems, bounds, depth, context) =
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  {rules = rules, prems = prems, bounds = bounds, depth = depth, context = context};
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fun map_ss1 f {rules, prems, bounds, depth, context} =
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  make_ss1 (f (rules, prems, bounds, depth, 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_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_procid ((s1: stamp, ths1: thm list), (s2, ths2)) =
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  s1 = s2 andalso eq_list Thm.eq_thm (ths1, ths2);
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fun eq_proc (Proc {id = id1, ...}, Proc {id = id2, ...}) = eq_procid (id1, id2);
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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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(* simp depth *)
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val simp_depth_limit_value = Config.declare false "simp_depth_limit" (Config.Int 100);
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val simp_depth_limit = Config.int simp_depth_limit_value;
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val trace_simp_depth_limit = Unsynchronized.ref 1;
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fun trace_depth (Simpset ({depth = (depth, exceeded), ...}, _)) msg =
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  if depth > ! trace_simp_depth_limit then
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    if ! exceeded then () else (tracing "trace_simp_depth_limit exceeded!"; exceeded := true)
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  else
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    (tracing (enclose "[" "]" (string_of_int depth) ^ msg); exceeded := false);
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val inc_simp_depth = map_simpset1 (fn (rules, prems, bounds, (depth, exceeded), context) =>
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  (rules, prems, bounds,
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    (depth + 1,
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      if depth = ! trace_simp_depth_limit then Unsynchronized.ref false else exceeded), context));
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fun simp_depth (Simpset ({depth = (depth, _), ...}, _)) = depth;
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(* diagnostics *)
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exception SIMPLIFIER of string * thm;
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val debug_simp = Unsynchronized.ref false;
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val trace_simp = Unsynchronized.ref false;
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local
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fun prnt ss warn a = if warn then warning a else trace_depth ss 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;
d8cf6eb9baf9 Term.declare_term_names;
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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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17705
a5d146aca659 removed revert_bound;
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in
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fun print_term ss warn a thy t = prnt ss warn (a ^ "\n" ^
26939
1035c89b4c02 moved global pretty/string_of functions from Sign to Syntax;
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  Syntax.string_of_term_global thy (if ! debug_simp then t else show_bounds ss t));
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fun debug warn a ss = if ! debug_simp then prnt ss warn (a ()) else ();
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fun trace warn a ss = if ! trace_simp then prnt ss warn (a ()) else ();
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fun debug_term warn a ss thy t = if ! debug_simp then print_term ss warn (a ()) thy t else ();
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fun trace_term warn a ss thy t = if ! trace_simp then print_term ss warn (a ()) thy t else ();
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fun trace_cterm warn a ss ct =
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  if ! trace_simp then print_term ss warn (a ()) (Thm.theory_of_cterm ct) (Thm.term_of ct)
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  else ();
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fun trace_thm a ss th =
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  if ! trace_simp then print_term ss false (a ()) (Thm.theory_of_thm th) (Thm.full_prop_of th)
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  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 ss false (if name = "" then a () else a () ^ " " ^ quote name ^ ":")
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      (Thm.theory_of_thm th) (Thm.full_prop_of th)
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   311
  else ();
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fun warn_thm a ss th =
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   314
  print_term ss true a (Thm.theory_of_thm th) (Thm.full_prop_of th);
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   315
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   316
fun cond_warn_thm a (ss as Simpset ({context, ...}, _)) th =
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   317
  if is_some context then () else warn_thm a ss th;
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   318
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   319
end;
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   321
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   323
(** simpset operations **)
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   324
17882
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(* context *)
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   326
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   327
fun eq_bound (x: string, (y, _)) = x = y;
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   328
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   329
fun add_bound bound = map_simpset1 (fn (rules, prems, (count, bounds), depth, context) =>
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  (rules, prems, (count + 1, bound :: bounds), depth, context));
17882
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fun add_prems ths = map_simpset1 (fn (rules, prems, bounds, depth, context) =>
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  (rules, ths @ prems, bounds, depth, context));
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   334
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fun inherit_context (Simpset ({bounds, depth, context, ...}, _)) =
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  map_simpset1 (fn (rules, prems, _, _, _) => (rules, prems, bounds, depth, context));
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17882
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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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17897
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   341
fun context ctxt =
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  map_simpset1 (fn (rules, prems, bounds, depth, _) => (rules, prems, bounds, depth, SOME ctxt));
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   343
21516
c2a116a2c4fd ProofContext.init;
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   344
val theory_context = context o ProofContext.init;
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   345
27312
2a884461a9f3 activate_context: strict the_context, no fallback on theory context;
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   346
fun activate_context thy ss =
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   347
  let
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    val ctxt = the_context ss;
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    val ctxt' = Context.transfer_proof (Theory.merge (thy, ProofContext.theory_of ctxt)) ctxt;
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  in context ctxt' ss end;
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1733b4680fde renamed set_context to context;
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   352
20028
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   353
(* maintain simp rules *)
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20546
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   355
(* FIXME: it seems that the conditions on extra variables are too liberal if
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   356
prems are nonempty: does solving the prems really guarantee instantiation of
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   357
all its Vars? Better: a dynamic check each time a rule is applied.
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   358
*)
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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   359
fun rewrite_rule_extra_vars prems elhs erhs =
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   360
  let
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   361
    val elhss = elhs :: prems;
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   362
    val tvars = fold Term.add_tvars elhss [];
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diff changeset
   363
    val vars = fold Term.add_vars elhss [];
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   364
  in
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   365
    erhs |> Term.exists_type (Term.exists_subtype
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   366
      (fn TVar v => not (member (op =) tvars v) | _ => false)) orelse
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   367
    erhs |> Term.exists_subterm
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   368
      (fn Var v => not (member (op =) vars v) | _ => false)
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   369
  end;
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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   370
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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   371
fun rrule_extra_vars elhs thm =
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   372
  rewrite_rule_extra_vars [] (term_of elhs) (Thm.full_prop_of thm);
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   373
15023
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diff changeset
   374
fun mk_rrule2 {thm, name, lhs, elhs, perm} =
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   375
  let
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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   376
    val t = term_of elhs;
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diff changeset
   377
    val fo = Pattern.first_order t orelse not (Pattern.pattern t);
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
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diff changeset
   378
    val extra = rrule_extra_vars elhs thm;
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diff changeset
   379
  in {thm = thm, name = name, lhs = lhs, elhs = elhs, extra = extra, fo = fo, perm = perm} end;
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parents:
diff changeset
   380
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
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diff changeset
   381
fun del_rrule (rrule as {thm, elhs, ...}) ss =
22892
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wenzelm
parents: 22717
diff changeset
   382
  ss |> map_simpset1 (fn (rules, prems, bounds, depth, context) =>
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
   383
    (Net.delete_term eq_rrule (term_of elhs, rrule) rules, prems, bounds, depth, context))
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   384
  handle Net.DELETE => (cond_warn_thm "Rewrite rule not in simpset:" ss thm; ss);
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   385
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   386
fun insert_rrule (rrule as {thm, name, ...}) ss =
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   387
 (trace_named_thm (fn () => "Adding rewrite rule") ss (thm, name);
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
   388
  ss |> map_simpset1 (fn (rules, prems, bounds, depth, context) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   389
    let
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   390
      val rrule2 as {elhs, ...} = mk_rrule2 rrule;
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   391
      val rules' = Net.insert_term eq_rrule (term_of elhs, rrule2) rules;
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
   392
    in (rules', prems, bounds, depth, context) end)
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   393
  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
   394
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   395
fun vperm (Var _, Var _) = true
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   396
  | vperm (Abs (_, _, s), Abs (_, _, t)) = vperm (s, t)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   397
  | vperm (t1 $ t2, u1 $ u2) = vperm (t1, u1) andalso vperm (t2, u2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   398
  | vperm (t, u) = (t = u);
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   399
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   400
fun var_perm (t, u) =
20197
ffc64d90fc1f use Term.add_vars instead of obsolete term_varnames;
wenzelm
parents: 20146
diff changeset
   401
  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
   402
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   403
(*simple test for looping rewrite rules and stupid orientations*)
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   404
fun default_reorient thy prems lhs rhs =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   405
  rewrite_rule_extra_vars prems lhs rhs
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   406
    orelse
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   407
  is_Var (head_of lhs)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   408
    orelse
16305
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   409
(* 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
   410
   usually it is very useful :-(
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   411
  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
   412
  andalso not(exists_subterm is_Var lhs)
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   413
    orelse
5e7b6731b004 Added the t = x "fix" - in (* ... *) :-(
nipkow
parents: 16042
diff changeset
   414
*)
16842
wenzelm
parents: 16807
diff changeset
   415
  exists (fn t => Logic.occs (lhs, t)) (rhs :: prems)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   416
    orelse
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
   417
  null prems andalso Pattern.matches thy (lhs, rhs)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   418
    (*the condition "null prems" is necessary because conditional rewrites
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   419
      with extra variables in the conditions may terminate although
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   420
      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
   421
    orelse
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   422
  is_Const lhs andalso not (is_Const rhs);
10413
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 decomp_simp thm =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   425
  let
26626
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   426
    val thy = Thm.theory_of_thm thm;
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   427
    val prop = Thm.prop_of thm;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   428
    val prems = Logic.strip_imp_prems prop;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   429
    val concl = Drule.strip_imp_concl (Thm.cprop_of thm);
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   430
    val (lhs, rhs) = Thm.dest_equals concl handle TERM _ =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   431
      raise SIMPLIFIER ("Rewrite rule not a meta-equality", thm);
20579
4dc799edef89 Thm.dest_arg;
wenzelm
parents: 20546
diff changeset
   432
    val elhs = Thm.dest_arg (Thm.cprop_of (Thm.eta_conversion lhs));
16665
b75568de32c6 decomp_simp: compare terms, not cterms;
wenzelm
parents: 16458
diff changeset
   433
    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
   434
    val erhs = Envir.eta_contract (term_of rhs);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   435
    val perm =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   436
      var_perm (term_of elhs, erhs) andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   437
      not (term_of elhs aconv erhs) andalso
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   438
      not (is_Var (term_of elhs));
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   439
  in (thy, prems, term_of lhs, elhs, term_of rhs, perm) end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   440
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   441
fun decomp_simp' thm =
12979
4c76bce4ce39 decomp_simp': use lhs instead of elhs (preserves more bound variable names);
wenzelm
parents: 12783
diff changeset
   442
  let val (_, _, lhs, _, rhs, _) = decomp_simp thm in
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   443
    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
   444
    else (lhs, rhs)
12783
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   445
  end;
36ca5ea8092c interface to Pattern.rewrite_term;
wenzelm
parents: 12779
diff changeset
   446
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   447
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
   448
  (case mk_eq_True thm of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   449
    NONE => []
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   450
  | SOME eq_True =>
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   451
      let
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   452
        val (_, _, lhs, elhs, _, _) = decomp_simp eq_True;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   453
      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
   454
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   455
(*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
   456
  in case there are extra vars on the rhs*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   457
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
   458
  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
   459
    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
   460
      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
   461
    else [rrule]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   462
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   463
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   464
fun mk_rrule ss (thm, name) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   465
  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
   466
    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
   467
    else
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   468
      (*weak test for loops*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   469
      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
   470
      then mk_eq_True ss (thm, name)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   471
      else rrule_eq_True (thm, name, lhs, elhs, rhs, ss, thm)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   472
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   473
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   474
fun orient_rrule ss (thm, name) =
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   475
  let
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   476
    val (thy, prems, lhs, elhs, rhs, perm) = decomp_simp thm;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   477
    val Simpset (_, {mk_rews = {reorient, mk_sym, ...}, ...}) = ss;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   478
  in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   479
    if perm then [{thm = thm, name = name, lhs = lhs, elhs = elhs, perm = true}]
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   480
    else if reorient thy prems lhs rhs then
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   481
      if reorient thy prems rhs lhs
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   482
      then mk_eq_True ss (thm, name)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   483
      else
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   484
        (case mk_sym thm of
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   485
          NONE => []
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   486
        | SOME thm' =>
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   487
            let val (_, _, lhs', elhs', rhs', _) = decomp_simp thm'
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   488
            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
   489
    else rrule_eq_True (thm, name, lhs, elhs, rhs, ss, thm)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   490
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   491
15199
29ca1fe63e7b undoing previous change
nipkow
parents: 15195
diff changeset
   492
fun extract_rews (Simpset (_, {mk_rews = {mk, ...}, ...}), thms) =
27865
27a8ad9612a3 moved basic thm operations from structure PureThy to Thm (cf. more_thm.ML);
wenzelm
parents: 27582
diff changeset
   493
  maps (fn thm => map (rpair (Thm.get_name_hint thm)) (mk thm)) thms;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   494
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   495
fun extract_safe_rrules (ss, thm) =
19482
9f11af8f7ef9 tuned basic list operators (flat, maps, map_filter);
wenzelm
parents: 19303
diff changeset
   496
  maps (orient_rrule ss) (extract_rews (ss, [thm]));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   497
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   498
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   499
(* add/del rules explicitly *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   500
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   501
fun comb_simps comb mk_rrule (ss, thms) =
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   502
  let
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   503
    val rews = extract_rews (ss, thms);
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   504
  in fold (fold comb o mk_rrule) rews ss end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   505
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   506
fun ss addsimps thms =
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   507
  comb_simps insert_rrule (mk_rrule ss) (ss, thms);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   508
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   509
fun ss delsimps thms =
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
   510
  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
   511
27558
33f215fa079e added further simple interfaces
haftmann
parents: 27312
diff changeset
   512
fun add_simp thm ss = ss addsimps [thm];
33f215fa079e added further simple interfaces
haftmann
parents: 27312
diff changeset
   513
fun del_simp thm ss = ss delsimps [thm];
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   514
30318
3d03190d2864 replaced archaic use of rep_ss by Simplifier.mksimps;
wenzelm
parents: 29269
diff changeset
   515
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   516
(* congs *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   517
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   518
fun cong_name (Const (a, _)) = SOME a
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   519
  | cong_name (Free (a, _)) = SOME ("Free: " ^ a)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   520
  | cong_name _ = NONE;
13835
12b2ffbe543a Change to meta simplifier: congruence rules may now have frees as head of term.
ballarin
parents: 13828
diff changeset
   521
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   522
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   523
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   524
fun is_full_cong_prems [] [] = true
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   525
  | is_full_cong_prems [] _ = false
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   526
  | is_full_cong_prems (p :: prems) varpairs =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   527
      (case Logic.strip_assums_concl p of
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   528
        Const ("==", _) $ lhs $ rhs =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   529
          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
   530
            is_Var x andalso forall is_Bound xs andalso
20972
db0425645cc7 abandoned findrep
haftmann
parents: 20905
diff changeset
   531
            not (has_duplicates (op =) xs) andalso xs = ys andalso
20671
2aa8269a868e member (op =);
wenzelm
parents: 20579
diff changeset
   532
            member (op =) varpairs (x, y) andalso
19303
7da7e96bd74d gen_eq_set, remove (op =);
wenzelm
parents: 19142
diff changeset
   533
            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
   534
          end
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   535
      | _ => false);
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
fun is_full_cong thm =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   538
  let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   539
    val prems = prems_of thm and concl = concl_of thm;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   540
    val (lhs, rhs) = Logic.dest_equals concl;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   541
    val (f, xs) = strip_comb lhs and (g, ys) = strip_comb rhs;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   542
  in
20972
db0425645cc7 abandoned findrep
haftmann
parents: 20905
diff changeset
   543
    f = g andalso not (has_duplicates (op =) (xs @ ys)) andalso length xs = length ys andalso
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   544
    is_full_cong_prems prems (xs ~~ ys)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   545
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   546
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   547
fun add_cong (ss, thm) = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   548
  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
   549
    let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   550
      val (lhs, _) = Thm.dest_equals (Drule.strip_imp_concl (Thm.cprop_of thm))
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   551
        handle TERM _ => raise SIMPLIFIER ("Congruence not a meta-equality", thm);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   552
    (*val lhs = Envir.eta_contract lhs;*)
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
   553
      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
   554
        raise SIMPLIFIER ("Congruence must start with a constant or free variable", thm);
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   555
      val (xs, weak) = congs;
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   556
      val _ =  if AList.defined (op =) xs a
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   557
        then warning ("Overwriting congruence rule for " ^ quote a)
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   558
        else ();
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   559
      val xs' = AList.update (op =) (a, thm) xs;
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   560
      val weak' = if is_full_cong thm then weak else a :: weak;
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   561
    in ((xs', weak'), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   562
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   563
fun del_cong (ss, thm) = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   564
  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
   565
    let
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   566
      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
   567
        raise SIMPLIFIER ("Congruence not a meta-equality", thm);
18929
d81435108688 Envir.(beta_)eta_contract;
wenzelm
parents: 18573
diff changeset
   568
    (*val lhs = Envir.eta_contract lhs;*)
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
   569
      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
   570
        raise SIMPLIFIER ("Congruence must start with a constant", thm);
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   571
      val (xs, _) = congs;
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   572
      val xs' = filter_out (fn (x : string, _) => x = a) xs;
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   573
      val weak' = xs' |> map_filter (fn (a, thm) =>
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   574
        if is_full_cong thm then NONE else SOME a);
22221
8a8aa6114a89 changed cong alist - now using AList operations instead of overwrite_warn
haftmann
parents: 22008
diff changeset
   575
    in ((xs', weak'), procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) end);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   576
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   577
fun mk_cong (Simpset (_, {mk_rews = {mk_cong = f, ...}, ...})) = f;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   578
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   579
in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   580
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   581
val (op addeqcongs) = Library.foldl add_cong;
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   582
val (op deleqcongs) = Library.foldl del_cong;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   583
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   584
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
   585
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
   586
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   587
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   588
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   589
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   590
(* simprocs *)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   591
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   592
datatype simproc =
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   593
  Simproc of
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   594
    {name: string,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   595
     lhss: cterm list,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   596
     proc: morphism -> simpset -> cterm -> thm option,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   597
     id: stamp * thm list};
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   598
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   599
fun eq_simproc (Simproc {id = id1, ...}, Simproc {id = id2, ...}) = eq_procid (id1, id2);
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   600
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   601
fun morph_simproc phi (Simproc {name, lhss, proc, id = (s, ths)}) =
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   602
  Simproc
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   603
   {name = name,
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   604
    lhss = map (Morphism.cterm phi) lhss,
22669
62857ad97cca Morphism.transform/form;
wenzelm
parents: 22360
diff changeset
   605
    proc = Morphism.transform phi proc,
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   606
    id = (s, Morphism.fact phi ths)};
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   607
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   608
fun make_simproc {name, lhss, proc, identifier} =
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   609
  Simproc {name = name, lhss = lhss, proc = proc, id = (stamp (), identifier)};
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   610
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   611
fun mk_simproc name lhss proc =
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   612
  make_simproc {name = name, lhss = lhss, proc = fn _ => fn ss => fn ct =>
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   613
    proc (ProofContext.theory_of (the_context ss)) ss (Thm.term_of ct), identifier = []};
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   614
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   615
(* FIXME avoid global thy and Logic.varify *)
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   616
fun simproc_i thy name = mk_simproc name o map (Thm.cterm_of thy o Logic.varify);
24707
dfeb98f84e93 Syntax.parse/check/read;
wenzelm
parents: 24358
diff changeset
   617
fun simproc thy name = simproc_i thy name o map (Syntax.read_term_global thy);
22008
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   618
bfc462bfc574 added mk_simproc': tuned interface;
wenzelm
parents: 21962
diff changeset
   619
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   620
local
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   621
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   622
fun add_proc (proc as Proc {name, lhs, ...}) ss =
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   623
 (trace_cterm false (fn () => "Adding simplification procedure " ^ quote name ^ " for") ss lhs;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   624
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   625
    (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
   626
      mk_rews, termless, subgoal_tac, loop_tacs, solvers)) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   627
  handle Net.INSERT =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   628
    (warning ("Ignoring duplicate simplification procedure " ^ quote name); ss));
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 del_proc (proc as Proc {name, lhs, ...}) ss =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   631
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
16807
730cace0ae48 export eq_rrule;
wenzelm
parents: 16665
diff changeset
   632
    (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
   633
      mk_rews, termless, subgoal_tac, loop_tacs, solvers)) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   634
  handle Net.DELETE =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   635
    (warning ("Simplification procedure " ^ quote name ^ " not in simpset"); ss);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   636
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   637
fun prep_procs (Simproc {name, lhss, proc, id}) =
22669
62857ad97cca Morphism.transform/form;
wenzelm
parents: 22360
diff changeset
   638
  lhss |> map (fn lhs => Proc {name = name, lhs = lhs, proc = Morphism.form proc, id = id});
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   639
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   640
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   641
22234
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   642
fun ss addsimprocs ps = fold (fold add_proc o prep_procs) ps ss;
52ba19aaa9c2 type simproc: explicitl dependency of morphism;
wenzelm
parents: 22221
diff changeset
   643
fun ss delsimprocs ps = fold (fold del_proc o prep_procs) ps ss;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   644
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   645
end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   646
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   647
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   648
(* mk_rews *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   649
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   650
local
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   651
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   652
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
   653
      termless, subgoal_tac, loop_tacs, solvers) =>
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   654
  let
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   655
    val (mk', mk_cong', mk_sym', mk_eq_True', reorient') =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   656
      f (mk, mk_cong, mk_sym, mk_eq_True, reorient);
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   657
    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
   658
      reorient = reorient'};
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   659
  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
   660
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   661
in
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   662
30336
efd1bec4630a renamed rep_ss to MetaSimplifier.internal_ss;
wenzelm
parents: 30318
diff changeset
   663
fun mksimps (Simpset (_, {mk_rews = {mk, ...}, ...})) = mk;
30318
3d03190d2864 replaced archaic use of rep_ss by Simplifier.mksimps;
wenzelm
parents: 29269
diff changeset
   664
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   665
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
   666
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   667
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   668
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
   669
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   670
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   671
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
   672
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   673
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   674
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
   675
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   676
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   677
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
   678
  (mk, mk_cong, mk_sym, mk_eq_True, reorient));
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   679
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   680
end;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   681
14242
ec70653a02bf Added access to the mk_rews field (and friends).
skalberg
parents: 14040
diff changeset
   682
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   683
(* termless *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   684
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   685
fun ss settermless termless = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   686
  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
   687
   (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
   688
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   689
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   690
(* tactics *)
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   691
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   692
fun ss setsubgoaler subgoal_tac = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   693
  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
   694
   (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
   695
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   696
fun ss setloop' tac = ss |>
15023
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, _, solvers) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   698
   (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
   699
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   700
fun ss setloop tac = ss setloop' (K tac);
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   701
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   702
fun ss addloop' (name, tac) = ss |>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   703
  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
   704
    (congs, procs, mk_rews, termless, subgoal_tac,
21286
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   705
      (if AList.defined (op =) loop_tacs name
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   706
        then warning ("Overwriting looper " ^ quote name)
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   707
        else (); AList.update (op =) (name, tac) loop_tacs),
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   708
      solvers));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   709
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   710
fun ss addloop (name, tac) = ss addloop' (name, K tac);
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
   711
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   712
fun ss delloop name = ss |>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   713
  map_simpset2 (fn (congs, procs, mk_rews, termless, subgoal_tac, loop_tacs, solvers) =>
21286
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   714
    (congs, procs, mk_rews, termless, subgoal_tac,
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   715
      (if AList.defined (op =) loop_tacs name
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   716
        then ()
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   717
        else warning ("No such looper in simpset: " ^ quote name);
b5e7b80caa6a introduces canonical AList functions for loop_tacs
haftmann
parents: 20972
diff changeset
   718
       AList.delete (op =) name loop_tacs), 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 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
   721
  subgoal_tac, loop_tacs, (unsafe_solvers, _)) =>
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   722
    (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
   723
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   724
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
   725
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
22717
74dbc7696083 canonical merge operations
haftmann
parents: 22669
diff changeset
   726
    subgoal_tac, loop_tacs, (unsafe_solvers, insert eq_solver solver solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   727
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   728
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
   729
  subgoal_tac, loop_tacs, (_, solvers)) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   730
    subgoal_tac, loop_tacs, ([solver], solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   731
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   732
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
   733
  subgoal_tac, loop_tacs, (unsafe_solvers, solvers)) => (congs, procs, mk_rews, termless,
22717
74dbc7696083 canonical merge operations
haftmann
parents: 22669
diff changeset
   734
    subgoal_tac, loop_tacs, (insert eq_solver solver unsafe_solvers, solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   735
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   736
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
   737
  subgoal_tac, loop_tacs, _) => (congs, procs, mk_rews, termless,
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   738
  subgoal_tac, loop_tacs, (solvers, solvers)));
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   739
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   740
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   741
(* empty *)
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   742
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   743
fun init_ss mk_rews termless subgoal_tac solvers =
32738
15bb09ca0378 explicit indication of Unsynchronized.ref;
wenzelm
parents: 31298
diff changeset
   744
  make_simpset ((Net.empty, [], (0, []), (0, Unsynchronized.ref false), NONE),
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   745
    (([], []), Net.empty, mk_rews, termless, subgoal_tac, [], solvers));
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 clear_ss (ss as Simpset (_, {mk_rews, termless, subgoal_tac, solvers, ...})) =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   748
  init_ss mk_rews termless subgoal_tac solvers
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   749
  |> inherit_context ss;
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   750
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   751
val basic_mk_rews: mk_rews =
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   752
 {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
   753
  mk_cong = I,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   754
  mk_sym = SOME o Drule.symmetric_fun,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   755
  mk_eq_True = K NONE,
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   756
  reorient = default_reorient};
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   757
29269
5c25a2012975 moved term order operations to structure TermOrd (cf. Pure/term_ord.ML);
wenzelm
parents: 28839
diff changeset
   758
val empty_ss = init_ss basic_mk_rews TermOrd.termless (K (K no_tac)) ([], []);
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   759
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   760
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   761
(* merge *)  (*NOTE: ignores some fields of 2nd simpset*)
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   762
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   763
fun merge_ss (ss1, ss2) =
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   764
  if pointer_eq (ss1, ss2) then ss1
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   765
  else
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   766
    let
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   767
      val Simpset ({rules = rules1, prems = prems1, bounds = bounds1, depth = depth1, context = _},
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   768
       {congs = (congs1, weak1), procs = procs1, mk_rews, termless, subgoal_tac,
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   769
        loop_tacs = loop_tacs1, solvers = (unsafe_solvers1, solvers1)}) = ss1;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   770
      val Simpset ({rules = rules2, prems = prems2, bounds = bounds2, depth = depth2, context = _},
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   771
       {congs = (congs2, weak2), procs = procs2, mk_rews = _, termless = _, subgoal_tac = _,
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   772
        loop_tacs = loop_tacs2, solvers = (unsafe_solvers2, solvers2)}) = ss2;
30356
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   773
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   774
      val rules' = Net.merge eq_rrule (rules1, rules2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   775
      val prems' = merge Thm.eq_thm_prop (prems1, prems2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   776
      val bounds' = if #1 bounds1 < #1 bounds2 then bounds2 else bounds1;
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   777
      val depth' = if #1 depth1 < #1 depth2 then depth2 else depth1;
31298
wenzelm
parents: 30908
diff changeset
   778
      val congs' = merge (Thm.eq_thm_prop o pairself #2) (congs1, congs2);
24358
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   779
      val weak' = merge (op =) (weak1, weak2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   780
      val procs' = Net.merge eq_proc (procs1, procs2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   781
      val loop_tacs' = AList.merge (op =) (K true) (loop_tacs1, loop_tacs2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   782
      val unsafe_solvers' = merge eq_solver (unsafe_solvers1, unsafe_solvers2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   783
      val solvers' = merge eq_solver (solvers1, solvers2);
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   784
    in
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   785
      make_simpset ((rules', prems', bounds', depth', NONE), ((congs', weak'), procs',
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   786
        mk_rews, termless, subgoal_tac, loop_tacs', (unsafe_solvers', solvers')))
d75af3e90e82 tuned merge operations via pointer_eq;
wenzelm
parents: 24124
diff changeset
   787
    end;
18208
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   788
dbdcf366db53 simpset: added reorient field, set_reorient;
wenzelm
parents: 17966
diff changeset
   789
30356
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   790
(* dest_ss *)
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   791
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   792
fun dest_ss (Simpset ({rules, ...}, {congs, procs, loop_tacs, solvers, ...})) =
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   793
 {simps = Net.entries rules
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   794
    |> map (fn {name, thm, ...} => (name, thm)),
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   795
  procs = Net.entries procs
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   796
    |> map (fn Proc {name, lhs, id, ...} => ((name, lhs), id))
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   797
    |> partition_eq (eq_snd eq_procid)
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   798
    |> map (fn ps => (fst (fst (hd ps)), map (snd o fst) ps)),
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   799
  congs = #1 congs,
30356
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   800
  weak_congs = #2 congs,
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   801
  loopers = map fst loop_tacs,
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   802
  unsafe_solvers = map solver_name (#1 solvers),
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   803
  safe_solvers = map solver_name (#2 solvers)};
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   804
36d0e00af606 added dest_ss;
wenzelm
parents: 30336
diff changeset
   805
15006
107e4dfd3b96 Merging the meta-simplifier with the Provers-simplifier. Next step:
skalberg
parents: 15001
diff changeset
   806
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   807
(** rewriting **)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   808
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   809
(*
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   810
  Uses conversions, see:
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   811
    L C Paulson, A higher-order implementation of rewriting,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   812
    Science of Computer Programming 3 (1983), pages 119-149.
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   813
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   814
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   815
fun check_conv msg ss thm thm' =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   816
  let
25472
3276a14d06a6 check_conv now only performs beta-eta-normalization when equations
berghofe
parents: 25203
diff changeset
   817
    val thm'' = transitive thm thm' handle THM _ =>
3276a14d06a6 check_conv now only performs beta-eta-normalization when equations
berghofe
parents: 25203
diff changeset
   818
     transitive thm (transitive
3276a14d06a6 check_conv now only performs beta-eta-normalization when equations
berghofe
parents: 25203
diff changeset
   819
       (symmetric (Drule.beta_eta_conversion (Thm.lhs_of thm'))) thm')
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   820
  in if msg then trace_thm (fn () => "SUCCEEDED") ss thm' else (); SOME thm'' end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   821
  handle THM _ =>
26626
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   822
    let
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   823
      val thy = Thm.theory_of_thm thm;
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   824
      val _ $ _ $ prop0 = Thm.prop_of thm;
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
   825
    in
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   826
      trace_thm (fn () => "Proved wrong thm (Check subgoaler?)") ss thm';
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   827
      trace_term false (fn () => "Should have proved:") ss thy prop0;
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   828
      NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   829
    end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   830
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   831
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   832
(* mk_procrule *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   833
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   834
fun mk_procrule ss thm =
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   835
  let val (_, prems, lhs, elhs, rhs, _) = decomp_simp thm in
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   836
    if rewrite_rule_extra_vars prems lhs rhs
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   837
    then (warn_thm "Extra vars on rhs:" ss thm; [])
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   838
    else [mk_rrule2 {thm = thm, name = "", lhs = lhs, elhs = elhs, perm = false}]
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   839
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   840
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   841
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   842
(* rewritec: conversion to apply the meta simpset to a term *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   843
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   844
(*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
   845
  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
   846
  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
   847
  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
   848
  already in normal form.
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   849
  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
   850
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   851
val skel0 = Bound 0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   852
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   853
(*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
   854
  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
   855
  in the lhs.*)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   856
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   857
fun uncond_skel ((_, weak), (lhs, rhs)) =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   858
  if null weak then rhs  (*optimization*)
20671
2aa8269a868e member (op =);
wenzelm
parents: 20579
diff changeset
   859
  else if exists_Const (member (op =) weak o #1) lhs then skel0
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   860
  else rhs;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   861
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   862
(*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
   863
  Otherwise those vars may become instantiated with unnormalized terms
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   864
  while the premises are solved.*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   865
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   866
fun cond_skel (args as (_, (lhs, rhs))) =
20197
ffc64d90fc1f use Term.add_vars instead of obsolete term_varnames;
wenzelm
parents: 20146
diff changeset
   867
  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
   868
  else skel0;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   869
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   870
(*
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   871
  Rewriting -- we try in order:
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   872
    (1) beta reduction
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   873
    (2) unconditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   874
    (3) conditional rewrite rules
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   875
    (4) simplification procedures
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   876
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   877
  IMPORTANT: rewrite rules must not introduce new Vars or TVars!
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   878
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   879
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   880
fun rewritec (prover, thyt, maxt) ss t =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   881
  let
24124
4399175e3014 turned simp_depth_limit into configuration option;
wenzelm
parents: 23938
diff changeset
   882
    val ctxt = the_context ss;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   883
    val Simpset ({rules, ...}, {congs, procs, termless, ...}) = ss;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   884
    val eta_thm = Thm.eta_conversion t;
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   885
    val eta_t' = Thm.rhs_of eta_thm;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   886
    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
   887
    fun rew {thm, name, lhs, elhs, extra, fo, perm} =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   888
      let
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   889
        val prop = Thm.prop_of thm;
20546
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   890
        val (rthm, elhs') =
8923deb735ad rrule: maintain 'extra' field for rule that contain extra vars outside elhs;
wenzelm
parents: 20330
diff changeset
   891
          if maxt = ~1 orelse not extra then (thm, elhs)
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   892
          else (Thm.incr_indexes (maxt + 1) thm, Thm.incr_indexes_cterm (maxt + 1) elhs);
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   893
        val insts =
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   894
          if fo then Thm.first_order_match (elhs', eta_t')
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   895
          else Thm.match (elhs', eta_t');
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   896
        val thm' = Thm.instantiate insts (Thm.rename_boundvars lhs eta_t rthm);
14643
wenzelm
parents: 14330
diff changeset
   897
        val prop' = Thm.prop_of thm';
21576
8c11b1ce2f05 simplified Logic.count_prems;
wenzelm
parents: 21565
diff changeset
   898
        val unconditional = (Logic.count_prems prop' = 0);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   899
        val (lhs', rhs') = Logic.dest_equals (Logic.strip_imp_concl prop')
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   900
      in
11295
66925f23ac7f improved tracing of permutative rules.
nipkow
parents: 11291
diff changeset
   901
        if perm andalso not (termless (rhs', lhs'))
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   902
        then (trace_named_thm (fn () => "Cannot apply permutative rewrite rule") ss (thm, name);
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   903
              trace_thm (fn () => "Term does not become smaller:") ss thm'; NONE)
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   904
        else (trace_named_thm (fn () => "Applying instance of rewrite rule") ss (thm, name);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   905
           if unconditional
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   906
           then
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   907
             (trace_thm (fn () => "Rewriting:") ss thm';
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   908
              let val lr = Logic.dest_equals prop;
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   909
                  val SOME thm'' = check_conv false ss eta_thm thm'
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   910
              in SOME (thm'', uncond_skel (congs, lr)) end)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   911
           else
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   912
             (trace_thm (fn () => "Trying to rewrite:") ss thm';
24124
4399175e3014 turned simp_depth_limit into configuration option;
wenzelm
parents: 23938
diff changeset
   913
              if simp_depth ss > Config.get ctxt simp_depth_limit
16042
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   914
              then let val s = "simp_depth_limit exceeded - giving up"
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
   915
                   in trace false (fn () => s) ss; warning s; NONE end
16042
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   916
              else
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   917
              case prover ss thm' of
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   918
                NONE => (trace_thm (fn () => "FAILED") ss thm'; NONE)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   919
              | SOME thm2 =>
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   920
                  (case check_conv true ss eta_thm thm2 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   921
                     NONE => NONE |
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   922
                     SOME thm2' =>
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   923
                       let val concl = Logic.strip_imp_concl prop
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   924
                           val lr = Logic.dest_equals concl
16042
8e15ff79851a tuned trace info (depth)
nipkow
parents: 15574
diff changeset
   925
                       in SOME (thm2', cond_skel (congs, lr)) end)))
10413
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
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   928
    fun rews [] = NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   929
      | rews (rrule :: rrules) =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   930
          let val opt = rew rrule handle Pattern.MATCH => NONE
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   931
          in case opt of NONE => rews rrules | some => some end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   932
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   933
    fun sort_rrules rrs = let
14643
wenzelm
parents: 14330
diff changeset
   934
      fun is_simple({thm, ...}:rrule) = case Thm.prop_of thm of
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   935
                                      Const("==",_) $ _ $ _ => true
12603
7d2bca103101 tuned tracing markup;
wenzelm
parents: 12285
diff changeset
   936
                                      | _                   => false
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   937
      fun sort []        (re1,re2) = re1 @ re2
12603
7d2bca103101 tuned tracing markup;
wenzelm
parents: 12285
diff changeset
   938
        | sort (rr::rrs) (re1,re2) = if is_simple rr
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   939
                                     then sort rrs (rr::re1,re2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   940
                                     else sort rrs (re1,rr::re2)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   941
    in sort rrs ([],[]) end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   942
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   943
    fun proc_rews [] = NONE
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   944
      | proc_rews (Proc {name, proc, lhs, ...} :: ps) =
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
   945
          if Pattern.matches thyt (Thm.term_of lhs, Thm.term_of t) then
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   946
            (debug_term false (fn () => "Trying procedure " ^ quote name ^ " on:") ss thyt eta_t;
23938
977d14aeb4d5 depth flag: plain bool ref;
wenzelm
parents: 23598
diff changeset
   947
             case proc ss eta_t' of
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
   948
               NONE => (debug false (fn () => "FAILED") ss; proc_rews ps)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   949
             | SOME raw_thm =>
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   950
                 (trace_thm (fn () => "Procedure " ^ quote name ^ " produced rewrite rule:")
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   951
                   ss raw_thm;
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   952
                  (case rews (mk_procrule ss raw_thm) of
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   953
                    NONE => (trace_cterm true (fn () => "IGNORED result of simproc " ^ quote name ^
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
   954
                      " -- does not match") ss t; proc_rews ps)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   955
                  | some => some)))
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   956
          else proc_rews ps;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   957
  in case eta_t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   958
       Abs _ $ _ => SOME (transitive eta_thm
12155
13c5469b4bb3 congc now returns None if congruence rule has no effect.
berghofe
parents: 11886
diff changeset
   959
         (beta_conversion false eta_t'), skel0)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   960
     | _ => (case rews (sort_rrules (Net.match_term rules eta_t)) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   961
               NONE => proc_rews (Net.match_term procs eta_t)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   962
             | some => some)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   963
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   964
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   965
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   966
(* conversion to apply a congruence rule to a term *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   967
30908
7ccf4a3d764c replace type cong = {thm : thm, lhs : term} by plain thm -- the other component has been unused for a long time.
krauss
parents: 30552
diff changeset
   968
fun congc prover ss maxt cong t =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   969
  let val rthm = Thm.incr_indexes (maxt + 1) cong;
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   970
      val rlhs = fst (Thm.dest_equals (Drule.strip_imp_concl (cprop_of rthm)));
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   971
      val insts = Thm.match (rlhs, t)
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   972
      (* Thm.match can raise Pattern.MATCH;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   973
         is handled when congc is called *)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   974
      val thm' = Thm.instantiate insts (Thm.rename_boundvars (term_of rlhs) (term_of t) rthm);
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
   975
      val _ = trace_thm (fn () => "Applying congruence rule:") ss thm';
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
   976
      fun err (msg, thm) = (trace_thm (fn () => msg) ss thm; NONE)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   977
  in case prover thm' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   978
       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
   979
     | 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
   980
          NONE => err ("Congruence proof failed.  Should not have proved", thm2)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   981
        | SOME thm2' =>
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   982
            if op aconv (pairself term_of (Thm.dest_equals (cprop_of thm2')))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   983
            then NONE else SOME thm2')
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   984
  end;
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   985
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   986
val (cA, (cB, cC)) =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
   987
  apsnd Thm.dest_equals (Thm.dest_implies (hd (cprems_of Drule.imp_cong)));
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   988
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   989
fun transitive1 NONE NONE = NONE
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   990
  | transitive1 (SOME thm1) NONE = SOME thm1
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   991
  | transitive1 NONE (SOME thm2) = SOME thm2
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   992
  | transitive1 (SOME thm1) (SOME thm2) = SOME (transitive thm1 thm2)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   993
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   994
fun transitive2 thm = transitive1 (SOME thm);
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
   995
fun transitive3 thm = transitive1 thm o SOME;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
   996
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
   997
fun bottomc ((simprem, useprem, mutsimp), prover, thy, maxidx) =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
   998
  let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
   999
    fun botc skel ss t =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1000
          if is_Var skel then NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1001
          else
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1002
          (case subc skel ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1003
             some as SOME thm1 =>
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1004
               (case rewritec (prover, thy, maxidx) ss (Thm.rhs_of thm1) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1005
                  SOME (thm2, skel2) =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1006
                    transitive2 (transitive thm1 thm2)
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1007
                      (botc skel2 ss (Thm.rhs_of thm2))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1008
                | NONE => some)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1009
           | NONE =>
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
  1010
               (case rewritec (prover, thy, maxidx) ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1011
                  SOME (thm2, skel2) => transitive2 thm2
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1012
                    (botc skel2 ss (Thm.rhs_of thm2))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1013
                | NONE => NONE))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1014
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1015
    and try_botc ss t =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1016
          (case botc skel0 ss t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1017
             SOME trec1 => trec1 | NONE => (reflexive t))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1018
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1019
    and subc skel (ss as Simpset ({bounds, ...}, {congs, ...})) t0 =
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1020
       (case term_of t0 of
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
  1021
           Abs (a, T, _) =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1022
             let
20079
ec5c8584487c replaced Term.variant(list) by Name.variant(_list);
wenzelm
parents: 20057
diff changeset
  1023
                 val b = Name.bound (#1 bounds);
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
  1024
                 val (v, t') = Thm.dest_abs (SOME b) t0;
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
  1025
                 val b' = #1 (Term.dest_Free (Thm.term_of v));
21962
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1026
                 val _ =
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1027
                   if b <> b' then
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1028
                     warning ("Simplifier: renamed bound variable " ^ quote b ^ " to " ^ quote b')
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1029
                   else ();
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1030
                 val ss' = add_bound ((b', T), a) ss;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1031
                 val skel' = case skel of Abs (_, _, sk) => sk | _ => skel0;
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1032
             in case botc skel' ss' t' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1033
                  SOME thm => SOME (abstract_rule a v thm)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1034
                | NONE => NONE
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1035
             end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1036
         | t $ _ => (case t of
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1037
             Const ("==>", _) $ _  => impc t0 ss
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1038
           | Abs _ =>
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1039
               let val thm = beta_conversion false t0
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1040
               in case subc skel0 ss (Thm.rhs_of thm) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1041
                    NONE => SOME thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1042
                  | SOME thm' => SOME (transitive thm thm')
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1043
               end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1044
           | _  =>
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1045
               let fun appc () =
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1046
                     let
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1047
                       val (tskel, uskel) = case skel of
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1048
                           tskel $ uskel => (tskel, uskel)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1049
                         | _ => (skel0, skel0);
10767
8fa4aafa7314 Thm: dest_comb, dest_abs, capply, cabs no longer global;
wenzelm
parents: 10413
diff changeset
  1050
                       val (ct, cu) = Thm.dest_comb t0
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1051
                     in
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1052
                     (case botc tskel ss ct of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1053
                        SOME thm1 =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1054
                          (case botc uskel ss cu of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1055
                             SOME thm2 => SOME (combination thm1 thm2)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1056
                           | NONE => SOME (combination thm1 (reflexive cu)))
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1057
                      | NONE =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1058
                          (case botc uskel ss cu of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1059
                             SOME thm1 => SOME (combination (reflexive ct) thm1)
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1060
                           | NONE => NONE))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1061
                     end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1062
                   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
  1063
               in case cong_name h of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1064
                    SOME a =>
17232
148c241d2492 some 'assoc' etc. refactoring
haftmann
parents: 17203
diff changeset
  1065
                      (case AList.lookup (op =) (fst congs) a of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1066
                         NONE => appc ()
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1067
                       | SOME cong =>
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1068
  (*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
  1069
    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
  1070
                          (let
16985
7df8abe926c3 improved bounds: nameless Term.bound, recover names for output;
wenzelm
parents: 16938
diff changeset
  1071
                             val thm = congc (prover ss) ss maxidx cong t0;
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1072
                             val t = the_default t0 (Option.map Thm.rhs_of thm);
10767
8fa4aafa7314 Thm: dest_comb, dest_abs, capply, cabs no longer global;
wenzelm
parents: 10413
diff changeset
  1073
                             val (cl, cr) = Thm.dest_comb t
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1074
                             val dVar = Var(("", 0), dummyT)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1075
                             val skel =
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1076
                               list_comb (h, replicate (length ts) dVar)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1077
                           in case botc skel ss cl of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1078
                                NONE => thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1079
                              | SOME thm' => transitive3 thm
12155
13c5469b4bb3 congc now returns None if congruence rule has no effect.
berghofe
parents: 11886
diff changeset
  1080
                                  (combination thm' (reflexive cr))
20057
058e913bac71 tuned exception handling;
wenzelm
parents: 20028
diff changeset
  1081
                           end handle Pattern.MATCH => appc ()))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1082
                  | _ => appc ()
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1083
               end)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1084
         | _ => NONE)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1085
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1086
    and impc ct ss =
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1087
      if mutsimp then mut_impc0 [] ct [] [] ss else nonmut_impc ct ss
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1088
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1089
    and rules_of_prem ss prem =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1090
      if maxidx_of_term (term_of prem) <> ~1
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1091
      then (trace_cterm true
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
  1092
        (fn () => "Cannot add premise as rewrite rule because it contains (type) unknowns:")
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
  1093
          ss prem; ([], NONE))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1094
      else
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1095
        let val asm = assume prem
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1096
        in (extract_safe_rrules (ss, asm), SOME asm) end
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1097
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1098
    and add_rrules (rrss, asms) ss =
20028
b9752164ad92 add/del_simps: warning for inactive simpset (no context);
wenzelm
parents: 19798
diff changeset
  1099
      (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
  1100
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1101
    and disch r prem eq =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1102
      let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1103
        val (lhs, rhs) = Thm.dest_equals (Thm.cprop_of eq);
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1104
        val eq' = implies_elim (Thm.instantiate
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1105
          ([], [(cA, prem), (cB, lhs), (cC, rhs)]) Drule.imp_cong)
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1106
          (implies_intr prem eq)
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1107
      in if not r then eq' else
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1108
        let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1109
          val (prem', concl) = Thm.dest_implies lhs;
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1110
          val (prem'', _) = Thm.dest_implies rhs
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1111
        in transitive (transitive
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1112
          (Thm.instantiate ([], [(cA, prem'), (cB, prem), (cC, concl)])
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1113
             Drule.swap_prems_eq) eq')
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1114
          (Thm.instantiate ([], [(cA, prem), (cB, prem''), (cC, concl)])
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1115
             Drule.swap_prems_eq)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1116
        end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1117
      end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1118
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1119
    and rebuild [] _ _ _ _ eq = eq
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
  1120
      | rebuild (prem :: prems) concl (_ :: rrss) (_ :: asms) ss eq =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1121
          let
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1122
            val ss' = add_rrules (rev rrss, rev asms) ss;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1123
            val concl' =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1124
              Drule.mk_implies (prem, the_default concl (Option.map Thm.rhs_of eq));
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1125
            val dprem = Option.map (disch false prem)
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
  1126
          in case rewritec (prover, thy, maxidx) ss' concl' of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1127
              NONE => rebuild prems concl' rrss asms ss (dprem eq)
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1128
            | SOME (eq', _) => transitive2 (fold (disch false)
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1129
                  prems (the (transitive3 (dprem eq) eq')))
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1130
                (mut_impc0 (rev prems) (Thm.rhs_of eq') (rev rrss) (rev asms) ss)
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1131
          end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1132
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1133
    and mut_impc0 prems concl rrss asms ss =
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1134
      let
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1135
        val prems' = strip_imp_prems concl;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1136
        val (rrss', asms') = split_list (map (rules_of_prem ss) prems')
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1137
      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
  1138
        (asms @ asms') [] [] [] [] ss ~1 ~1
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1139
      end
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1140
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1141
    and mut_impc [] concl [] [] prems' rrss' asms' eqns ss changed k =
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1142
        transitive1 (Library.foldl (fn (eq2, (eq1, prem)) => transitive1 eq1
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1143
            (Option.map (disch false prem) eq2)) (NONE, eqns ~~ prems'))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1144
          (if changed > 0 then
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1145
             mut_impc (rev prems') concl (rev rrss') (rev asms')
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1146
               [] [] [] [] ss ~1 changed
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1147
           else rebuild prems' concl rrss' asms' ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1148
             (botc skel0 (add_rrules (rev rrss', rev asms') ss) concl))
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1149
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1150
      | mut_impc (prem :: prems) concl (rrs :: rrss) (asm :: asms)
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1151
          prems' rrss' asms' eqns ss changed k =
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1152
        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
  1153
          (rev rrss' @ rrss, rev asms' @ asms) ss) prem) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1154
            NONE => mut_impc prems concl rrss asms (prem :: prems')
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1155
              (rrs :: rrss') (asm :: asms') (NONE :: eqns) ss changed
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1156
              (if k = 0 then 0 else k - 1)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1157
          | SOME eqn =>
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1158
            let
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1159
              val prem' = Thm.rhs_of eqn;
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1160
              val tprems = map term_of prems;
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
  1161
              val i = 1 + Library.foldl Int.max (~1, map (fn p =>
19618
wenzelm
parents: 19502
diff changeset
  1162
                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
  1163
              val (rrs', asm') = rules_of_prem ss prem'
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1164
            in mut_impc prems concl rrss asms (prem' :: prems')
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1165
              (rrs' :: rrss') (asm' :: asms') (SOME (fold_rev (disch true)
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1166
                (Library.take (i, prems))
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1167
                (Drule.imp_cong_rule eqn (reflexive (Drule.list_implies
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1168
                  (Library.drop (i, prems), concl))))) :: eqns)
20671
2aa8269a868e member (op =);
wenzelm
parents: 20579
diff changeset
  1169
                  ss (length prems') ~1
13607
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1170
            end
6908230623a3 Completely reimplemented mutual simplification of premises.
berghofe
parents: 13569
diff changeset
  1171
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1172
     (*legacy code - only for backwards compatibility*)
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1173
     and nonmut_impc ct ss =
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1174
       let val (prem, conc) = Thm.dest_implies ct;
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1175
           val thm1 = if simprem then botc skel0 ss prem else NONE;
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1176
           val prem1 = the_default prem (Option.map Thm.rhs_of thm1);
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1177
           val ss1 = if not useprem then ss else add_rrules
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1178
             (apsnd single (apfst single (rules_of_prem ss prem1))) ss
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1179
       in (case botc skel0 ss1 conc of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1180
           NONE => (case thm1 of
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1181
               NONE => NONE
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1182
             | SOME thm1' => SOME (Drule.imp_cong_rule thm1' (reflexive conc)))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1183
         | SOME thm2 =>
23178
07ba6b58b3d2 simplified/unified list fold;
wenzelm
parents: 22902
diff changeset
  1184
           let val thm2' = disch false prem1 thm2
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1185
           in (case thm1 of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1186
               NONE => SOME thm2'
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15460
diff changeset
  1187
             | SOME thm1' =>
18470
19be817913c4 renamed imp_cong' to imp_cong_rule;
wenzelm
parents: 18208
diff changeset
  1188
                 SOME (transitive (Drule.imp_cong_rule thm1' (reflexive conc)) thm2'))
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1189
           end)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1190
       end
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1191
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1192
 in try_botc end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1193
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1194
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1195
(* Meta-rewriting: rewrites t to u and returns the theorem t==u *)
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1196
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1197
(*
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1198
  Parameters:
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1199
    mode = (simplify A,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1200
            use A in simplifying B,
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1201
            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
  1202
           when simplifying A ==> B
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1203
    prover: how to solve premises in conditional rewrites and congruences
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1204
*)
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1205
32738
15bb09ca0378 explicit indication of Unsynchronized.ref;
wenzelm
parents: 31298
diff changeset
  1206
val debug_bounds = Unsynchronized.ref false;
17705
a5d146aca659 removed revert_bound;
wenzelm
parents: 17614
diff changeset
  1207
21962
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1208
fun check_bounds ss ct =
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1209
  if ! debug_bounds then
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1210
    let
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1211
      val Simpset ({bounds = (_, bounds), ...}, _) = ss;
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1212
      val bs = fold_aterms (fn Free (x, _) =>
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1213
          if Name.is_bound x andalso not (AList.defined eq_bound bounds x)
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1214
          then insert (op =) x else I
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1215
        | _ => I) (term_of ct) [];
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1216
    in
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1217
      if null bs then ()
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1218
      else print_term ss true ("Simplifier: term contains loose bounds: " ^ commas_quote bs)
21962
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1219
        (Thm.theory_of_cterm ct) (Thm.term_of ct)
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1220
    end
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1221
  else ();
17614
37ee526db497 added mk_solver';
wenzelm
parents: 17496
diff changeset
  1222
19052
113dbd65319e rewrite_cterm: Thm.adjust_maxidx prevents unnecessary increments on rules;
wenzelm
parents: 18929
diff changeset
  1223
fun rewrite_cterm mode prover raw_ss raw_ct =
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1224
  let
26626
c6231d64d264 rep_cterm/rep_thm: no longer dereference theory_ref;
wenzelm
parents: 26424
diff changeset
  1225
    val thy = Thm.theory_of_cterm raw_ct;
20260
990dbc007ca6 Thm.adjust_maxidx;
wenzelm
parents: 20228
diff changeset
  1226
    val ct = Thm.adjust_maxidx_cterm ~1 raw_ct;
32797
2e8fae2d998c eliminated dead code;
wenzelm
parents: 32738
diff changeset
  1227
    val {maxidx, ...} = Thm.rep_cterm ct;
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1228
    val ss = inc_simp_depth (activate_context thy raw_ss);
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1229
    val depth = simp_depth ss;
21962
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1230
    val _ =
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1231
      if depth mod 20 = 0 then
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1232
        warning ("Simplification depth " ^ string_of_int depth)
21962
279b129498b6 removed conditional combinator;
wenzelm
parents: 21708
diff changeset
  1233
      else ();
22254
420625970f31 trace/debug: avoid eager string concatenation;
wenzelm
parents: 22234
diff changeset
  1234
    val _ = trace_cterm false (fn () => "SIMPLIFIER INVOKED ON THE FOLLOWING TERM:") ss ct;
17882
b6e44fc46cf0 added set/addloop' for simpset dependent loopers;
wenzelm
parents: 17756
diff changeset
  1235
    val _ = check_bounds ss ct;
22892
c77a1e1c7323 simp_depth: now proper value in simpset (prevents problems with lost exception trace, enables multi-threaded simplification);
wenzelm
parents: 22717
diff changeset
  1236
  in bottomc (mode, Option.map Drule.flexflex_unique oo prover, thy, maxidx) ss ct end;
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1237
21708
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1238
val simple_prover =
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1239
  SINGLE o (fn ss => ALLGOALS (resolve_tac (prems_of_ss ss)));
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1240
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1241
fun rewrite _ [] ct = Thm.reflexive ct
27582
367aff8d7ffd dropped junk
haftmann
parents: 27558
diff changeset
  1242
  | rewrite full thms ct = rewrite_cterm (full, false, false) simple_prover
367aff8d7ffd dropped junk
haftmann
parents: 27558
diff changeset
  1243
      (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
  1244
23598
wenzelm
parents: 23584
diff changeset
  1245
fun simplify full thms = Conv.fconv_rule (rewrite full thms);
21708
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1246
val rewrite_rule = simplify true;
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
parents: 21646
diff changeset
  1247
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1248
(*simple term rewriting -- no proof*)
16458
4c6fd0c01d28 accomodate change of TheoryDataFun;
wenzelm
parents: 16380
diff changeset
  1249
fun rewrite_term thy rules procs =
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17046
diff changeset
  1250
  Pattern.rewrite_term thy (map decomp_simp' rules) procs;
15023
0e4689f411d5 major cleanup; got rid of obsolete meta_simpset;
wenzelm
parents: 15011
diff changeset
  1251
22902
ac833b4bb7ee moved some Drule operations to Thm (see more_thm.ML);
wenzelm
parents: 22892
diff changeset
  1252
fun rewrite_thm mode prover ss = Conv.fconv_rule (rewrite_cterm mode prover ss);
10413
0e015d9bea4e Added new file meta_simplifier.ML
berghofe
parents:
diff changeset
  1253
23536
60a1672e298e moved (asm_)rewrite_goal_tac from goal.ML to meta_simplifier.ML (no longer depends on SELECT_GOAL);
wenzelm
parents: 23221
diff changeset
  1254
(*Rewrite the subgoals of a proof state (represented by a theorem)*)
21708
45e7491bea47 reorganized structure Tactic vs. MetaSimplifier;
wenzelm
p