src/Pure/thm.ML
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(*  Title:      Pure/thm.ML
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    ID:         $Id$
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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    Copyright   1994  University of Cambridge
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The core of Isabelle's Meta Logic: certified types and terms, meta
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theorems, meta rules (including lifting and resolution).
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*)
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signature BASIC_THM =
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  sig
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  (*certified types*)
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  type ctyp
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  val rep_ctyp          : ctyp -> {sign: Sign.sg, T: typ}
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  val typ_of            : ctyp -> typ
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  val ctyp_of           : Sign.sg -> typ -> ctyp
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  val read_ctyp         : Sign.sg -> string -> ctyp
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  (*certified terms*)
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  type cterm
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  exception CTERM of string
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  val rep_cterm         : cterm -> {sign: Sign.sg, t: term, T: typ, maxidx: int}
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  val crep_cterm        : cterm -> {sign: Sign.sg, t: term, T: ctyp, maxidx: int}
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  val sign_of_cterm	: cterm -> Sign.sg
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  val term_of           : cterm -> term
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  val cterm_of          : Sign.sg -> term -> cterm
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  val ctyp_of_term      : cterm -> ctyp
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  val read_cterm        : Sign.sg -> string * typ -> cterm
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  val cterm_fun         : (term -> term) -> (cterm -> cterm)
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  val adjust_maxidx     : cterm -> cterm
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  val read_def_cterm    :
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    Sign.sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> bool -> string * typ -> cterm * (indexname * typ) list
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  val read_def_cterms   :
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    Sign.sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> bool -> (string * typ)list
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    -> cterm list * (indexname * typ)list
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  type tag		(* = string * string list *)
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  (*meta theorems*)
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  type thm
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  val rep_thm           : thm -> {sign: Sign.sg, der: bool * Proofterm.proof, maxidx: int,
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                                  shyps: sort list, hyps: term list, 
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                                  prop: term}
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  val crep_thm          : thm -> {sign: Sign.sg, der: bool * Proofterm.proof, maxidx: int,
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                                  shyps: sort list, hyps: cterm list, 
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                                  prop: cterm}
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  exception THM of string * int * thm list
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  type 'a attribute 	(* = 'a * thm -> 'a * thm *)
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  val eq_thm		: thm * thm -> bool
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  val sign_of_thm       : thm -> Sign.sg
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  val prop_of           : thm -> term
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  val proof_of		: thm -> Proofterm.proof
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  val transfer_sg	: Sign.sg -> thm -> thm
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  val transfer		: theory -> thm -> thm
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  val tpairs_of         : thm -> (term * term) list
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  val prems_of          : thm -> term list
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  val nprems_of         : thm -> int
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  val concl_of          : thm -> term
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  val cprop_of          : thm -> cterm
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  val extra_shyps       : thm -> sort list
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  val strip_shyps       : thm -> thm
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  val get_axiom         : theory -> xstring -> thm
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  val def_name		: string -> string
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  val get_def           : theory -> xstring -> thm
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  val axioms_of         : theory -> (string * thm) list
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  (*meta rules*)
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  val assume            : cterm -> thm
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  val compress          : thm -> thm
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  val implies_intr      : cterm -> thm -> thm
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  val implies_elim      : thm -> thm -> thm
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  val forall_intr       : cterm -> thm -> thm
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  val forall_elim       : cterm -> thm -> thm
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  val reflexive         : cterm -> thm
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  val symmetric         : thm -> thm
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  val transitive        : thm -> thm -> thm
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  val beta_conversion   : bool -> cterm -> thm
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  val eta_conversion    : cterm -> thm
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  val abstract_rule     : string -> cterm -> thm -> thm
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  val combination       : thm -> thm -> thm
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  val equal_intr        : thm -> thm -> thm
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  val equal_elim        : thm -> thm -> thm
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  val implies_intr_hyps : thm -> thm
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  val flexflex_rule     : thm -> thm Seq.seq
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  val instantiate       :
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    (indexname * ctyp) list * (cterm * cterm) list -> thm -> thm
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  val trivial           : cterm -> thm
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  val class_triv        : Sign.sg -> class -> thm
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  val varifyT           : thm -> thm
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  val varifyT'          : string list -> thm -> thm * (string * indexname) list
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  val freezeT           : thm -> thm
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  val dest_state        : thm * int ->
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    (term * term) list * term list * term * term
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  val lift_rule         : (thm * int) -> thm -> thm
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  val incr_indexes      : int -> thm -> thm
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  val assumption        : int -> thm -> thm Seq.seq
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  val eq_assumption     : int -> thm -> thm
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  val rotate_rule       : int -> int -> thm -> thm
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  val permute_prems     : int -> int -> thm -> thm
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  val rename_params_rule: string list * int -> thm -> thm
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  val bicompose         : bool -> bool * thm * int ->
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    int -> thm -> thm Seq.seq
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  val biresolution      : bool -> (bool * thm) list ->
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    int -> thm -> thm Seq.seq
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  val invoke_oracle     : theory -> xstring -> Sign.sg * Object.T -> thm
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end;
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signature THM =
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sig
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  include BASIC_THM
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  val dest_comb         : cterm -> cterm * cterm
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  val dest_abs          : string option -> cterm -> cterm * cterm
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  val capply            : cterm -> cterm -> cterm
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  val cabs              : cterm -> cterm -> cterm
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  val major_prem_of	: thm -> term
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  val no_prems		: thm -> bool
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  val no_attributes	: 'a -> 'a * 'b attribute list
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  val apply_attributes	: ('a * thm) * 'a attribute list -> ('a * thm)
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  val applys_attributes	: ('a * thm list) * 'a attribute list -> ('a * thm list)
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  val get_name_tags	: thm -> string * tag list
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  val put_name_tags	: string * tag list -> thm -> thm
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  val name_of_thm	: thm -> string
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  val tags_of_thm	: thm -> tag list
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  val name_thm		: string * thm -> thm
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  val rename_boundvars  : term -> term -> thm -> thm
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  val cterm_match       : cterm * cterm ->
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    (indexname * ctyp) list * (cterm * cterm) list
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  val cterm_first_order_match : cterm * cterm ->
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    (indexname * ctyp) list * (cterm * cterm) list
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  val cterm_incr_indexes : int -> cterm -> cterm
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end;
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structure Thm: THM =
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struct
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(*** Certified terms and types ***)
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(** certified types **)
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(*certified typs under a signature*)
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datatype ctyp = Ctyp of {sign_ref: Sign.sg_ref, T: typ};
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fun rep_ctyp (Ctyp {sign_ref, T}) = {sign = Sign.deref sign_ref, T = T};
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fun typ_of (Ctyp {T, ...}) = T;
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fun ctyp_of sign T =
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  Ctyp {sign_ref = Sign.self_ref sign, T = Sign.certify_typ sign T};
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fun read_ctyp sign s =
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  Ctyp {sign_ref = Sign.self_ref sign, T = Sign.read_typ (sign, K None) s};
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(** certified terms **)
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(*certified terms under a signature, with checked typ and maxidx of Vars*)
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datatype cterm = Cterm of {sign_ref: Sign.sg_ref, t: term, T: typ, maxidx: int};
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fun rep_cterm (Cterm {sign_ref, t, T, maxidx}) =
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  {sign = Sign.deref sign_ref, t = t, T = T, maxidx = maxidx};
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fun crep_cterm (Cterm {sign_ref, t, T, maxidx}) =
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  {sign = Sign.deref sign_ref, t = t, T = Ctyp {sign_ref = sign_ref, T = T},
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    maxidx = maxidx};
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fun sign_of_cterm (Cterm {sign_ref, ...}) = Sign.deref sign_ref;
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fun term_of (Cterm {t, ...}) = t;
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fun ctyp_of_term (Cterm {sign_ref, T, ...}) = Ctyp {sign_ref = sign_ref, T = T};
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(*create a cterm by checking a "raw" term with respect to a signature*)
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fun cterm_of sign tm =
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  let val (t, T, maxidx) = Sign.certify_term sign tm
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  in  Cterm {sign_ref = Sign.self_ref sign, t = t, T = T, maxidx = maxidx}
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  end;
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fun cterm_fun f (Cterm {sign_ref, t, ...}) = cterm_of (Sign.deref sign_ref) (f t);
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exception CTERM of string;
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(*Destruct application in cterms*)
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fun dest_comb (Cterm {sign_ref, T, maxidx, t = A $ B}) =
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      let val typeA = fastype_of A;
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          val typeB =
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            case typeA of Type("fun",[S,T]) => S
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                        | _ => error "Function type expected in dest_comb";
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      in
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      (Cterm {sign_ref=sign_ref, maxidx=maxidx, t=A, T=typeA},
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       Cterm {sign_ref=sign_ref, maxidx=maxidx, t=B, T=typeB})
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      end
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  | dest_comb _ = raise CTERM "dest_comb";
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(*Destruct abstraction in cterms*)
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fun dest_abs a (Cterm {sign_ref, T as Type("fun",[_,S]), maxidx, t=Abs(x,ty,M)}) = 
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      let val (y,N) = variant_abs (if_none a x,ty,M)
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      in (Cterm {sign_ref = sign_ref, T = ty, maxidx = 0, t = Free(y,ty)},
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          Cterm {sign_ref = sign_ref, T = S, maxidx = maxidx, t = N})
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      end
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  | dest_abs _ _ = raise CTERM "dest_abs";
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(*Makes maxidx precise: it is often too big*)
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fun adjust_maxidx (ct as Cterm {sign_ref, T, t, maxidx, ...}) =
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  if maxidx = ~1 then ct 
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  else  Cterm {sign_ref = sign_ref, T = T, maxidx = maxidx_of_term t, t = t};
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(*Form cterm out of a function and an argument*)
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fun capply (Cterm {t=f, sign_ref=sign_ref1, T=Type("fun",[dty,rty]), maxidx=maxidx1})
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           (Cterm {t=x, sign_ref=sign_ref2, T, maxidx=maxidx2}) =
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      if T = dty then
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        Cterm{t=Sign.nodup_vars (f$x), sign_ref=Sign.merge_refs(sign_ref1,sign_ref2), T=rty,
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          maxidx=Int.max(maxidx1, maxidx2)}
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      else raise CTERM "capply: types don't agree"
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  | capply _ _ = raise CTERM "capply: first arg is not a function"
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fun cabs (Cterm {t=Free(a,ty), sign_ref=sign_ref1, T=T1, maxidx=maxidx1})
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         (Cterm {t=t2, sign_ref=sign_ref2, T=T2, maxidx=maxidx2}) =
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      Cterm {t=Sign.nodup_vars (absfree(a,ty,t2)), sign_ref=Sign.merge_refs(sign_ref1,sign_ref2),
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             T = ty --> T2, maxidx=Int.max(maxidx1, maxidx2)}
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  | cabs _ _ = raise CTERM "cabs: first arg is not a free variable";
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(*Matching of cterms*)
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fun gen_cterm_match mtch
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      (Cterm {sign_ref = sign_ref1, maxidx = maxidx1, t = t1, ...},
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       Cterm {sign_ref = sign_ref2, maxidx = maxidx2, t = t2, ...}) =
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  let
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    val sign_ref = Sign.merge_refs (sign_ref1, sign_ref2);
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    val tsig = Sign.tsig_of (Sign.deref sign_ref);
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    val (Tinsts, tinsts) = mtch tsig (t1, t2);
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    val maxidx = Int.max (maxidx1, maxidx2);
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    val vars = map dest_Var (term_vars t1);
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    fun mk_cTinsts (ixn, T) = (ixn, Ctyp {sign_ref = sign_ref, T = T});
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    fun mk_ctinsts (ixn, t) =
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      let val T = typ_subst_TVars Tinsts (the (assoc (vars, ixn)))
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      in
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        (Cterm {sign_ref = sign_ref, maxidx = maxidx, T = T, t = Var (ixn, T)},
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         Cterm {sign_ref = sign_ref, maxidx = maxidx, T = T, t = t})
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      end;
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  in (map mk_cTinsts Tinsts, map mk_ctinsts tinsts) end;
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val cterm_match = gen_cterm_match Pattern.match;
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val cterm_first_order_match = gen_cterm_match Pattern.first_order_match;
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(*Incrementing indexes*)
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fun cterm_incr_indexes i (ct as Cterm {sign_ref, maxidx, t, T}) =
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  if i < 0 then raise CTERM "negative increment" else 
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  if i = 0 then ct else
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    Cterm {sign_ref = sign_ref, maxidx = maxidx + i,
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      t = Logic.incr_indexes ([], i) t, T = Term.incr_tvar i T};
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0a7169d89b7a added termless parameter;
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810da101bad2 read_def_cterm: minor changes;
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(** read cterms **)   (*exception ERROR*)
250
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(*read terms, infer types, certify terms*)
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fun read_def_cterms (sign, types, sorts) used freeze sTs =
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  let
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    val (ts', tye) = Sign.read_def_terms (sign, types, sorts) used freeze sTs;
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    val cts = map (cterm_of sign) ts'
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      handle TYPE (msg, _, _) => error msg
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           | TERM (msg, _) => error msg;
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  in (cts, tye) end;
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(*read term, infer types, certify term*)
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fun read_def_cterm args used freeze aT =
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  let val ([ct],tye) = read_def_cterms args used freeze [aT]
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  in (ct,tye) end;
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fun read_cterm sign = #1 o read_def_cterm (sign, K None, K None) [] true;
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250
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6089
4d2d5556b4f9 signature BASIC_THM;
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(*tags provide additional comment, apart from the axiom/theorem name*)
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type tag = string * string list;
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69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
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(*** Meta theorems ***)
229
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11518
5f2616a1c10a Replaced old derivations by proof terms.
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structure Pt = Proofterm;
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datatype thm = Thm of
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 {sign_ref: Sign.sg_ref,       (*mutable reference to signature*)
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  der: bool * Pt.proof,        (*derivation*)
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  maxidx: int,                 (*maximum index of any Var or TVar*)
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  shyps: sort list,            (*sort hypotheses*)
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  hyps: term list,             (*hypotheses*)
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  prop: term};                 (*conclusion*)
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fun rep_thm (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
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  {sign = Sign.deref sign_ref, der = der, maxidx = maxidx,
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    shyps = shyps, hyps = hyps, prop = prop};
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(*Version of rep_thm returning cterms instead of terms*)
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fun crep_thm (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
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  let fun ctermf max t = Cterm{sign_ref=sign_ref, t=t, T=propT, maxidx=max};
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  in {sign = Sign.deref sign_ref, der = der, maxidx = maxidx, shyps = shyps,
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      hyps = map (ctermf ~1) hyps,
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      prop = ctermf maxidx prop}
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  end;
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(*errors involving theorems*)
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exception THM of string * int * thm list;
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(*attributes subsume any kind of rules or addXXXs modifiers*)
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type 'a attribute = 'a * thm -> 'a * thm;
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4d2d5556b4f9 signature BASIC_THM;
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fun no_attributes x = (x, []);
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fun apply_attributes (x_th, atts) = Library.apply atts x_th;
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fun applys_attributes (x_ths, atts) = foldl_map (Library.apply atts) x_ths;
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fun eq_thm (th1, th2) =
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  let
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    val {sign = sg1, shyps = shyps1, hyps = hyps1, prop = prop1, ...} =
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      rep_thm th1;
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    val {sign = sg2, shyps = shyps2, hyps = hyps2, prop = prop2, ...} =
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      rep_thm th2;
3994
0343230ec85c eq_thm (from drule.ML);
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  in
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    Sign.joinable (sg1, sg2) andalso
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    eq_set_sort (shyps1, shyps2) andalso
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    aconvs (hyps1, hyps2) andalso
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    prop1 aconv prop2
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  end;
387
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fun sign_of_thm (Thm {sign_ref, ...}) = Sign.deref sign_ref;
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fun prop_of (Thm {prop, ...}) = prop;
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fun proof_of (Thm {der = (_, proof), ...}) = proof;
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(*merge signatures of two theorems; raise exception if incompatible*)
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fun merge_thm_sgs
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    (th1 as Thm {sign_ref = sgr1, ...}, th2 as Thm {sign_ref = sgr2, ...}) =
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  Sign.merge_refs (sgr1, sgr2) handle TERM (msg, _) => raise THM (msg, 0, [th1, th2]);
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(*transfer thm to super theory (non-destructive)*)
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fun transfer_sg sign' thm =
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  let
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    val Thm {sign_ref, der, maxidx, shyps, hyps, prop} = thm;
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    val sign = Sign.deref sign_ref;
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  in
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   343
    if Sign.eq_sg (sign, sign') then thm
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    else if Sign.subsig (sign, sign') then
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      Thm {sign_ref = Sign.self_ref sign', der = der, maxidx = maxidx,
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        shyps = shyps, hyps = hyps, prop = prop}
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    else raise THM ("transfer: not a super theory", 0, [thm])
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  end;
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5d58c100ca3f qualify Theory.sign_of etc.;
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val transfer = transfer_sg o Theory.sign_of;
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(*maps object-rule to tpairs*)
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fun tpairs_of (Thm {prop, ...}) = #1 (Logic.strip_flexpairs prop);
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(*maps object-rule to premises*)
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fun prems_of (Thm {prop, ...}) =
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  Logic.strip_imp_prems (Logic.skip_flexpairs prop);
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(*counts premises in a rule*)
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fun nprems_of (Thm {prop, ...}) =
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  Logic.count_prems (Logic.skip_flexpairs prop, 0);
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   363
fun major_prem_of thm =
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   364
  (case prems_of thm of
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6d15ae4b1123 major_prem_of: Logic.strip_assums_concl;
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   365
    prem :: _ => Logic.strip_assums_concl prem
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52d9f64841d6 added major_prem_of;
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   366
  | [] => raise THM ("major_prem_of: rule with no premises", 0, [thm]));
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   367
7534
30344dde83ab added no_prems;
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   368
fun no_prems thm = nprems_of thm = 0;
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   369
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(*maps object-rule to conclusion*)
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   371
fun concl_of (Thm {prop, ...}) = Logic.strip_imp_concl prop;
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(*the statement of any thm is a cterm*)
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fun cprop_of (Thm {sign_ref, maxidx, prop, ...}) =
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  Cterm {sign_ref = sign_ref, maxidx = maxidx, T = propT, t = prop};
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
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   376
387
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   377
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289c573327f0 considerably tuned shyps handling;
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   379
(** sort contexts of theorems **)
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   380
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   381
(* basic utils *)
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   382
2163
4d43e7486164 tuned fix_shyps a little bit more;
wenzelm
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diff changeset
   383
(*accumulate sorts suppressing duplicates; these are coded low levelly
1238
289c573327f0 considerably tuned shyps handling;
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diff changeset
   384
  to improve efficiency a bit*)
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   385
289c573327f0 considerably tuned shyps handling;
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   386
fun add_typ_sorts (Type (_, Ts), Ss) = add_typs_sorts (Ts, Ss)
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
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   387
  | add_typ_sorts (TFree (_, S), Ss) = ins_sort(S,Ss)
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   388
  | add_typ_sorts (TVar (_, S), Ss) = ins_sort(S,Ss)
1238
289c573327f0 considerably tuned shyps handling;
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   389
and add_typs_sorts ([], Ss) = Ss
289c573327f0 considerably tuned shyps handling;
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diff changeset
   390
  | add_typs_sorts (T :: Ts, Ss) = add_typs_sorts (Ts, add_typ_sorts (T, Ss));
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diff changeset
   391
289c573327f0 considerably tuned shyps handling;
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diff changeset
   392
fun add_term_sorts (Const (_, T), Ss) = add_typ_sorts (T, Ss)
289c573327f0 considerably tuned shyps handling;
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   393
  | add_term_sorts (Free (_, T), Ss) = add_typ_sorts (T, Ss)
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diff changeset
   394
  | add_term_sorts (Var (_, T), Ss) = add_typ_sorts (T, Ss)
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wenzelm
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diff changeset
   395
  | add_term_sorts (Bound _, Ss) = Ss
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   396
  | add_term_sorts (Abs (_,T,t), Ss) = add_term_sorts (t, add_typ_sorts (T,Ss))
1238
289c573327f0 considerably tuned shyps handling;
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diff changeset
   397
  | add_term_sorts (t $ u, Ss) = add_term_sorts (t, add_term_sorts (u, Ss));
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diff changeset
   398
289c573327f0 considerably tuned shyps handling;
wenzelm
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diff changeset
   399
fun add_terms_sorts ([], Ss) = Ss
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   400
  | add_terms_sorts (t::ts, Ss) = add_terms_sorts (ts, add_term_sorts (t,Ss));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   401
8407
d522ad1809e9 Envir now uses Vartab instead of association lists.
berghofe
parents: 8299
diff changeset
   402
fun env_codT (Envir.Envir {iTs, ...}) = map snd (Vartab.dest iTs);
1258
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   403
8407
d522ad1809e9 Envir now uses Vartab instead of association lists.
berghofe
parents: 8299
diff changeset
   404
fun add_env_sorts (Envir.Envir {iTs, asol, ...}, Ss) =
d522ad1809e9 Envir now uses Vartab instead of association lists.
berghofe
parents: 8299
diff changeset
   405
  Vartab.foldl (add_term_sorts o swap o apsnd snd)
d522ad1809e9 Envir now uses Vartab instead of association lists.
berghofe
parents: 8299
diff changeset
   406
    (Vartab.foldl (add_typ_sorts o swap o apsnd snd) (Ss, iTs), asol);
1258
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   407
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   408
fun add_insts_sorts ((iTs, is), Ss) =
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   409
  add_typs_sorts (map snd iTs, add_terms_sorts (map snd is, Ss));
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   410
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   411
fun add_thm_sorts (Thm {hyps, prop, ...}, Ss) =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   412
  add_terms_sorts (hyps, add_term_sorts (prop, Ss));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   413
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   414
fun add_thms_shyps ([], Ss) = Ss
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   415
  | add_thms_shyps (Thm {shyps, ...} :: ths, Ss) =
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   416
      add_thms_shyps (ths, union_sort (shyps, Ss));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   417
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   418
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   419
(*get 'dangling' sort constraints of a thm*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   420
fun extra_shyps (th as Thm {shyps, ...}) =
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   421
  Term.rems_sort (shyps, add_thm_sorts (th, []));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   422
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   423
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   424
(* fix_shyps *)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   425
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   426
fun all_sorts_nonempty sign_ref = is_some (Sign.univ_witness (Sign.deref sign_ref));
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   427
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   428
(*preserve sort contexts of rule premises and substituted types*)
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   429
fun fix_shyps thms Ts (thm as Thm {sign_ref, der, maxidx, hyps, prop, ...}) =
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   430
  Thm
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   431
   {sign_ref = sign_ref,
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   432
    der = der,             (*no new derivation, as other rules call this*)
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   433
    maxidx = maxidx,
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   434
    shyps =
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   435
      if all_sorts_nonempty sign_ref then []
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   436
      else add_thm_sorts (thm, add_typs_sorts (Ts, add_thms_shyps (thms, []))),
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   437
    hyps = hyps, prop = prop}
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   438
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   439
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   440
(* strip_shyps *)
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   441
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   442
(*remove extra sorts that are non-empty by virtue of type signature information*)
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   443
fun strip_shyps (thm as Thm {shyps = [], ...}) = thm
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   444
  | strip_shyps (thm as Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   445
      let
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   446
        val sign = Sign.deref sign_ref;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   447
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   448
        val present_sorts = add_thm_sorts (thm, []);
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   449
        val extra_shyps = Term.rems_sort (shyps, present_sorts);
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   450
        val witnessed_shyps = Sign.witness_sorts sign present_sorts extra_shyps;
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   451
      in
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   452
        Thm {sign_ref = sign_ref, der = der, maxidx = maxidx,
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   453
             shyps = Term.rems_sort (shyps, map #2 witnessed_shyps),
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   454
             hyps = hyps, prop = prop}
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   455
      end;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   456
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   457
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   458
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   459
(** Axioms **)
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   460
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   461
(*look up the named axiom in the theory*)
3812
66fa30839377 fixed get_axiom, invoke_oracle;
wenzelm
parents: 3789
diff changeset
   462
fun get_axiom theory raw_name =
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   463
  let
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   464
    val name = Sign.intern (Theory.sign_of theory) Theory.axiomK raw_name;
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   465
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   466
    fun get_ax [] = None
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   467
      | get_ax (thy :: thys) =
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   468
          let val {sign, axioms, ...} = Theory.rep_theory thy in
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   469
            (case Symtab.lookup (axioms, name) of
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   470
              Some t =>
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   471
                Some (fix_shyps [] []
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   472
                  (Thm {sign_ref = Sign.self_ref sign,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   473
                    der = Pt.infer_derivs' I
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   474
                      (false, Pt.axm_proof name t),
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   475
                    maxidx = maxidx_of_term t,
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   476
                    shyps = [], 
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   477
                    hyps = [], 
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   478
                    prop = t}))
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   479
            | None => get_ax thys)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   480
          end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   481
  in
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   482
    (case get_ax (theory :: Theory.ancestors_of theory) of
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   483
      Some thm => thm
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   484
    | None => raise THEORY ("No axiom " ^ quote name, [theory]))
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   485
  end;
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   486
6368
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   487
fun def_name name = name ^ "_def";
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   488
fun get_def thy = get_axiom thy o def_name;
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   489
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   490
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   491
(*return additional axioms of this theory node*)
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   492
fun axioms_of thy =
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   493
  map (fn (s, _) => (s, get_axiom thy s))
6390
5d58c100ca3f qualify Theory.sign_of etc.;
wenzelm
parents: 6368
diff changeset
   494
    (Symtab.dest (#axioms (Theory.rep_theory thy)));
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   495
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   496
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   497
(* name and tags -- make proof objects more readable *)
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   498
12923
9ba7c5358fa0 fixed get_name_tags in order to work with hyps;
wenzelm
parents: 12803
diff changeset
   499
fun get_name_tags (Thm {hyps, prop, der = (_, prf), ...}) =
9ba7c5358fa0 fixed get_name_tags in order to work with hyps;
wenzelm
parents: 12803
diff changeset
   500
  Pt.get_name_tags hyps prop prf;
4018
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   501
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   502
fun put_name_tags x (Thm {sign_ref, der = (ora, prf), maxidx, shyps, hyps, prop}) =
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   503
  Thm {sign_ref = sign_ref,
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   504
    der = (ora, Pt.thm_proof (Sign.deref sign_ref) x hyps prop prf),
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   505
    maxidx = maxidx, shyps = shyps, hyps = hyps, prop = prop};
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   506
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   507
val name_of_thm = #1 o get_name_tags;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   508
val tags_of_thm = #2 o get_name_tags;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   509
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   510
fun name_thm (name, thm) = put_name_tags (name, tags_of_thm thm) thm;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   511
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   512
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   513
(*Compression of theorems -- a separate rule, not integrated with the others,
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   514
  as it could be slow.*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   515
fun compress (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) = 
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   516
    Thm {sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   517
         der = der,     (*No derivation recorded!*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   518
         maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   519
         shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   520
         hyps = map Term.compress_term hyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   521
         prop = Term.compress_term prop};
564
eec3a9222b50 added inferT_axm;
wenzelm
parents: 480
diff changeset
   522
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   523
2509
0a7169d89b7a added termless parameter;
wenzelm
parents: 2386
diff changeset
   524
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   525
(*** Meta rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   526
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   527
(*Check that term does not contain same var with different typing/sorting.
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   528
  If this check must be made, recalculate maxidx in hope of preventing its
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   529
  recurrence.*)
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   530
fun nodup_vars (thm as Thm{sign_ref, der, maxidx, shyps, hyps, prop}) s =
8296
wenzelm
parents: 8291
diff changeset
   531
  Thm {sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   532
         der = der,     
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   533
         maxidx = maxidx_of_term prop,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   534
         shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   535
         hyps = hyps, 
8296
wenzelm
parents: 8291
diff changeset
   536
         prop = Sign.nodup_vars prop}
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   537
  handle TYPE(msg,Ts,ts) => raise TYPE(s^": "^msg,Ts,ts);
1495
b8b54847c77f Added check for duplicate vars with distinct types/sorts (nodup_Vars)
nipkow
parents: 1493
diff changeset
   538
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   539
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   540
(** 'primitive' rules **)
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   541
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   542
(*discharge all assumptions t from ts*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   543
val disch = gen_rem (op aconv);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   544
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   545
(*The assumption rule A|-A in a theory*)
5344
6a949382cdfe assume: adjust_maxidx;
wenzelm
parents: 5342
diff changeset
   546
fun assume raw_ct : thm =
6a949382cdfe assume: adjust_maxidx;
wenzelm
parents: 5342
diff changeset
   547
  let val ct as Cterm {sign_ref, t=prop, T, maxidx} = adjust_maxidx raw_ct
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   548
  in  if T<>propT then
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   549
        raise THM("assume: assumptions must have type prop", 0, [])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   550
      else if maxidx <> ~1 then
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   551
        raise THM("assume: assumptions may not contain scheme variables",
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   552
                  maxidx, [])
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   553
      else Thm{sign_ref   = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   554
               der    = Pt.infer_derivs' I (false, Pt.Hyp prop),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   555
               maxidx = ~1, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   556
               shyps  = add_term_sorts(prop,[]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   557
               hyps   = [prop], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   558
               prop   = prop}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   559
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   560
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   561
(*Implication introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   562
    [A]
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   563
     :
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   564
     B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   565
  -------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   566
  A ==> B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   567
*)
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   568
fun implies_intr cA (thB as Thm{sign_ref,der,maxidx,hyps,shyps,prop}) : thm =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   569
  let val Cterm {sign_ref=sign_refA, t=A, T, maxidx=maxidxA} = cA
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   570
  in  if T<>propT then
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   571
        raise THM("implies_intr: assumptions must have type prop", 0, [thB])
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   572
      else
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   573
         Thm{sign_ref = Sign.merge_refs (sign_ref,sign_refA),  
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   574
             der = Pt.infer_derivs' (Pt.implies_intr_proof A) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   575
             maxidx = Int.max(maxidxA, maxidx),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   576
             shyps = add_term_sorts (A, shyps),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   577
             hyps = disch(hyps,A),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   578
             prop = implies$A$prop}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   579
      handle TERM _ =>
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   580
        raise THM("implies_intr: incompatible signatures", 0, [thB])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   581
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   582
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   583
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   584
(*Implication elimination
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   585
  A ==> B    A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   586
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   587
        B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   588
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   589
fun implies_elim thAB thA : thm =
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   590
    let val Thm{maxidx=maxA, der=derA, hyps=hypsA, shyps=shypsA, prop=propA, ...} = thA
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   591
        and Thm{der, maxidx, hyps, shyps, prop, ...} = thAB;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   592
        fun err(a) = raise THM("implies_elim: "^a, 0, [thAB,thA])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   593
    in  case prop of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   594
            imp$A$B =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   595
                if imp=implies andalso  A aconv propA
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   596
                then
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   597
                  Thm{sign_ref= merge_thm_sgs(thAB,thA),
11612
ae8450657bf0 Exchanged % and %%.
berghofe
parents: 11563
diff changeset
   598
                      der = Pt.infer_derivs (curry Pt.%%) der derA,
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   599
                      maxidx = Int.max(maxA,maxidx),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   600
                      shyps = union_sort (shypsA, shyps),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   601
                      hyps = union_term(hypsA,hyps),  (*dups suppressed*)
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   602
                      prop = B}
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   603
                else err("major premise")
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   604
          | _ => err("major premise")
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   605
    end;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   606
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   607
(*Forall introduction.  The Free or Var x must not be free in the hypotheses.
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   608
    A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   609
  -----
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   610
  !!x.A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   611
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   612
fun forall_intr cx (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) =
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   613
  let val x = term_of cx;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   614
      fun result(a,T) = fix_shyps [th] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   615
        (Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   616
             der = Pt.infer_derivs' (Pt.forall_intr_proof x a) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   617
             maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   618
             shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   619
             hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   620
             prop = all(T) $ Abs(a, T, abstract_over (x,prop))})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   621
  in  case x of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   622
        Free(a,T) =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   623
          if exists (apl(x, Logic.occs)) hyps
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   624
          then  raise THM("forall_intr: variable free in assumptions", 0, [th])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   625
          else  result(a,T)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   626
      | Var((a,_),T) => result(a,T)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   627
      | _ => raise THM("forall_intr: not a variable", 0, [th])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   628
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   629
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   630
(*Forall elimination
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   631
  !!x.A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   632
  ------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   633
  A[t/x]
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   634
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   635
fun forall_elim ct (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) : thm =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   636
  let val Cterm {sign_ref=sign_reft, t, T, maxidx=maxt} = ct
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   637
  in  case prop of
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   638
        Const("all",Type("fun",[Type("fun",[qary,_]),_])) $ A =>
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   639
          if T<>qary then
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   640
              raise THM("forall_elim: type mismatch", 0, [th])
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   641
          else let val thm = fix_shyps [th] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   642
                    (Thm{sign_ref= Sign.merge_refs(sign_ref,sign_reft),
11612
ae8450657bf0 Exchanged % and %%.
berghofe
parents: 11563
diff changeset
   643
                         der = Pt.infer_derivs' (Pt.% o rpair (Some t)) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   644
                         maxidx = Int.max(maxidx, maxt),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   645
                         shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   646
                         hyps = hyps,  
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   647
                         prop = betapply(A,t)})
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   648
               in if maxt >= 0 andalso maxidx >= 0
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   649
                  then nodup_vars thm "forall_elim" 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   650
                  else thm (*no new Vars: no expensive check!*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   651
               end
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   652
      | _ => raise THM("forall_elim: not quantified", 0, [th])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   653
  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   654
  handle TERM _ =>
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   655
         raise THM("forall_elim: incompatible signatures", 0, [th]);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   656
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   657
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   658
(* Equality *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   659
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   660
(*The reflexivity rule: maps  t   to the theorem   t==t   *)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   661
fun reflexive ct =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   662
  let val Cterm {sign_ref, t, T, maxidx} = ct
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   663
  in Thm{sign_ref= sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   664
         der = Pt.infer_derivs' I (false, Pt.reflexive),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   665
         shyps = add_term_sorts (t, []),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   666
         hyps = [], 
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   667
         maxidx = maxidx,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   668
         prop = Logic.mk_equals(t,t)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   669
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   670
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   671
(*The symmetry rule
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   672
  t==u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   673
  ----
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   674
  u==t
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   675
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   676
fun symmetric (th as Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   677
  case prop of
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   678
      (eq as Const("==", Type (_, [T, _]))) $ t $ u =>
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   679
        (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   680
          Thm{sign_ref = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   681
              der = Pt.infer_derivs' Pt.symmetric der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   682
              maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   683
              shyps = shyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   684
              hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   685
              prop = eq$u$t}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   686
    | _ => raise THM("symmetric", 0, [th]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   687
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   688
(*The transitive rule
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   689
  t1==u    u==t2
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   690
  --------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   691
      t1==t2
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   692
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   693
fun transitive th1 th2 =
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   694
  let val Thm{der=der1, maxidx=max1, hyps=hyps1, shyps=shyps1, prop=prop1,...} = th1
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   695
      and Thm{der=der2, maxidx=max2, hyps=hyps2, shyps=shyps2, prop=prop2,...} = th2;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   696
      fun err(msg) = raise THM("transitive: "^msg, 0, [th1,th2])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   697
  in case (prop1,prop2) of
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   698
       ((eq as Const("==", Type (_, [T, _]))) $ t1 $ u, Const("==",_) $ u' $ t2) =>
1634
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
   699
          if not (u aconv u') then err"middle term"
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
   700
          else let val thm =      
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   701
                 Thm{sign_ref= merge_thm_sgs(th1,th2), 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   702
                     der = Pt.infer_derivs (Pt.transitive u T) der1 der2,
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   703
                     maxidx = Int.max(max1,max2), 
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   704
                     shyps = union_sort (shyps1, shyps2),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   705
                     hyps = union_term(hyps1,hyps2),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   706
                     prop = eq$t1$t2}
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   707
                 in if max1 >= 0 andalso max2 >= 0
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   708
                    then nodup_vars thm "transitive" 
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   709
                    else thm (*no new Vars: no expensive check!*)
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   710
                 end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   711
     | _ =>  err"premises"
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   712
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   713
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   714
(*Beta-conversion: maps (%x.t)(u) to the theorem (%x.t)(u) == t[u/x]
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   715
  Fully beta-reduces the term if full=true
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   716
*)
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   717
fun beta_conversion full ct =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   718
  let val Cterm {sign_ref, t, T, maxidx} = ct
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   719
  in Thm
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   720
    {sign_ref = sign_ref,  
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   721
     der = Pt.infer_derivs' I (false, Pt.reflexive),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   722
     maxidx = maxidx,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   723
     shyps = add_term_sorts (t, []),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   724
     hyps = [],
10486
7b07dd104a1a Envir.beta_norm;
wenzelm
parents: 10416
diff changeset
   725
     prop = Logic.mk_equals (t, if full then Envir.beta_norm t
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   726
       else case t of
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   727
          Abs(_, _, bodt) $ u => subst_bound (u, bodt)
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   728
        | _ => raise THM ("beta_conversion: not a redex", 0, []))}
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   729
  end;
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   730
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   731
fun eta_conversion ct =
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   732
  let val Cterm {sign_ref, t, T, maxidx} = ct
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   733
  in Thm
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   734
    {sign_ref = sign_ref,  
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   735
     der = Pt.infer_derivs' I (false, Pt.reflexive),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   736
     maxidx = maxidx,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   737
     shyps = add_term_sorts (t, []),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   738
     hyps = [],
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   739
     prop = Logic.mk_equals (t, Pattern.eta_contract t)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   740
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   741
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   742
(*The abstraction rule.  The Free or Var x must not be free in the hypotheses.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   743
  The bound variable will be named "a" (since x will be something like x320)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   744
     t == u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   745
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   746
  %x.t == %x.u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   747
*)
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   748
fun abstract_rule a cx (th as Thm{sign_ref,der,maxidx,hyps,shyps,prop}) =
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   749
  let val x = term_of cx;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   750
      val (t,u) = Logic.dest_equals prop
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   751
            handle TERM _ =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   752
                raise THM("abstract_rule: premise not an equality", 0, [th])
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   753
      fun result T =
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   754
           Thm{sign_ref = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   755
               der = Pt.infer_derivs' (Pt.abstract_rule x a) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   756
               maxidx = maxidx, 
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   757
               shyps = add_typ_sorts (T, shyps), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   758
               hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   759
               prop = Logic.mk_equals(Abs(a, T, abstract_over (x,t)),
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   760
                                      Abs(a, T, abstract_over (x,u)))}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   761
  in  case x of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   762
        Free(_,T) =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   763
         if exists (apl(x, Logic.occs)) hyps
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   764
         then raise THM("abstract_rule: variable free in assumptions", 0, [th])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   765
         else result T
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   766
      | Var(_,T) => result T
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   767
      | _ => raise THM("abstract_rule: not a variable", 0, [th])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   768
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   769
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   770
(*The combination rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   771
  f == g  t == u
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   772
  --------------
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   773
   f(t) == g(u)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   774
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   775
fun combination th1 th2 =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   776
  let val Thm{der=der1, maxidx=max1, shyps=shyps1, hyps=hyps1, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   777
              prop=prop1,...} = th1
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   778
      and Thm{der=der2, maxidx=max2, shyps=shyps2, hyps=hyps2, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   779
              prop=prop2,...} = th2
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   780
      fun chktypes fT tT =
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   781
            (case fT of
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   782
                Type("fun",[T1,T2]) => 
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   783
                    if T1 <> tT then
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   784
                         raise THM("combination: types", 0, [th1,th2])
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   785
                    else ()
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   786
                | _ => raise THM("combination: not function type", 0, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   787
                                 [th1,th2]))
1495
b8b54847c77f Added check for duplicate vars with distinct types/sorts (nodup_Vars)
nipkow
parents: 1493
diff changeset
   788
  in case (prop1,prop2)  of
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   789
       (Const ("==", Type ("fun", [fT, _])) $ f $ g,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   790
        Const ("==", Type ("fun", [tT, _])) $ t $ u) =>
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   791
          let val _   = chktypes fT tT
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   792
              val thm = (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   793
                        Thm{sign_ref = merge_thm_sgs(th1,th2), 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   794
                            der = Pt.infer_derivs
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   795
                              (Pt.combination f g t u fT) der1 der2,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   796
                            maxidx = Int.max(max1,max2), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   797
                            shyps = union_sort(shyps1,shyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   798
                            hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   799
                            prop = Logic.mk_equals(f$t, g$u)}
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   800
          in if max1 >= 0 andalso max2 >= 0
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   801
             then nodup_vars thm "combination" 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   802
             else thm (*no new Vars: no expensive check!*)  
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   803
          end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   804
     | _ =>  raise THM("combination: premises", 0, [th1,th2])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   805
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   806
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   807
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   808
(* Equality introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   809
  A ==> B  B ==> A
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   810
  ----------------
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   811
       A == B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   812
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   813
fun equal_intr th1 th2 =
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   814
  let val Thm{der=der1, maxidx=max1, shyps=shyps1, hyps=hyps1, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   815
              prop=prop1,...} = th1
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   816
      and Thm{der=der2, maxidx=max2, shyps=shyps2, hyps=hyps2, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   817
              prop=prop2,...} = th2;
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   818
      fun err(msg) = raise THM("equal_intr: "^msg, 0, [th1,th2])
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   819
  in case (prop1,prop2) of
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   820
       (Const("==>",_) $ A $ B, Const("==>",_) $ B' $ A')  =>
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   821
          if A aconv A' andalso B aconv B'
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   822
          then
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   823
            (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   824
              Thm{sign_ref = merge_thm_sgs(th1,th2),
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   825
                  der = Pt.infer_derivs (Pt.equal_intr A B) der1 der2,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   826
                  maxidx = Int.max(max1,max2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   827
                  shyps = union_sort(shyps1,shyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   828
                  hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   829
                  prop = Logic.mk_equals(A,B)}
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   830
          else err"not equal"
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   831
     | _ =>  err"premises"
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   832
  end;
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   833
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   834
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   835
(*The equal propositions rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   836
  A == B  A
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   837
  ---------
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   838
      B
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   839
*)
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   840
fun equal_elim th1 th2 =
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   841
  let val Thm{der=der1, maxidx=max1, hyps=hyps1, prop=prop1,...} = th1
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   842
      and Thm{der=der2, maxidx=max2, hyps=hyps2, prop=prop2,...} = th2;
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   843
      fun err(msg) = raise THM("equal_elim: "^msg, 0, [th1,th2])
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   844
  in  case prop1  of
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   845
       Const("==",_) $ A $ B =>
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   846
          if not (prop2 aconv A) then err"not equal"  else
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   847
            fix_shyps [th1, th2] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   848
              (Thm{sign_ref= merge_thm_sgs(th1,th2), 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   849
                   der = Pt.infer_derivs (Pt.equal_elim A B) der1 der2,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   850
                   maxidx = Int.max(max1,max2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   851
                   shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   852
                   hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   853
                   prop = B})
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   854
     | _ =>  err"major premise"
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   855
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   856
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   857
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   858
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   859
(**** Derived rules ****)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   860
1503
7dba648ee25c Elimination of fully-functorial style.
paulson
parents: 1495
diff changeset
   861
(*Discharge all hypotheses.  Need not verify cterms or call fix_shyps.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   862
  Repeated hypotheses are discharged only once;  fold cannot do this*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   863
fun implies_intr_hyps (Thm{sign_ref, der, maxidx, shyps, hyps=A::As, prop}) =
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   864
      implies_intr_hyps (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   865
            (Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   866
                 der = Pt.infer_derivs' (Pt.implies_intr_proof A) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   867
                 maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   868
                 shyps = shyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   869
                 hyps = disch(As,A),  
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   870
                 prop = implies$A$prop})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   871
  | implies_intr_hyps th = th;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   872
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   873
(*Smash" unifies the list of term pairs leaving no flex-flex pairs.
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   874
  Instantiates the theorem and deletes trivial tpairs.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   875
  Resulting sequence may contain multiple elements if the tpairs are
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   876
    not all flex-flex. *)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   877
fun flexflex_rule (th as Thm{sign_ref, der, maxidx, hyps, prop,...}) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   878
  let fun newthm env =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   879
          if Envir.is_empty env then th
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   880
          else
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   881
          let val (tpairs,horn) =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   882
                        Logic.strip_flexpairs (Envir.norm_term env prop)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   883
                (*Remove trivial tpairs, of the form t=t*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   884
              val distpairs = filter (not o op aconv) tpairs
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   885
              val newprop = Logic.list_flexpairs(distpairs, horn)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   886
          in  fix_shyps [th] (env_codT env)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   887
                (Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   888
                     der = Pt.infer_derivs' (Pt.norm_proof' env) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   889
                     maxidx = maxidx_of_term newprop, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   890
                     shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   891
                     hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   892
                     prop = newprop})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   893
          end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   894
      val (tpairs,_) = Logic.strip_flexpairs prop
4270
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
   895
  in Seq.map newthm
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   896
            (Unify.smash_unifiers(Sign.deref sign_ref, Envir.empty maxidx, tpairs))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   897
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   898
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   899
(*Instantiation of Vars
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   900
           A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   901
  -------------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   902
  A[t1/v1,....,tn/vn]
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   903
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   904
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   905
local
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   906
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   907
(*Check that all the terms are Vars and are distinct*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   908
fun instl_ok ts = forall is_Var ts andalso null(findrep ts);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   909
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   910
fun prt_typing sg_ref t T =
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   911
  let val sg = Sign.deref sg_ref in
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   912
    Pretty.block [Sign.pretty_term sg t, Pretty.str " ::", Pretty.brk 1, Sign.pretty_typ sg T]
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   913
  end;
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   914
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   915
(*For instantiate: process pair of cterms, merge theories*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   916
fun add_ctpair ((ct,cu), (sign_ref,tpairs)) =
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   917
  let
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   918
    val Cterm {sign_ref=sign_reft, t=t, T= T, ...} = ct
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   919
    and Cterm {sign_ref=sign_refu, t=u, T= U, ...} = cu;
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   920
    val sign_ref_merged = Sign.merge_refs (sign_ref, Sign.merge_refs (sign_reft, sign_refu));
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   921
  in
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   922
    if T=U then (sign_ref_merged, (t,u)::tpairs)
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   923
    else raise TYPE (Pretty.string_of (Pretty.block [Pretty.str "instantiate: type conflict",
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   924
      Pretty.fbrk, prt_typing sign_ref_merged t T,
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   925
      Pretty.fbrk, prt_typing sign_ref_merged u U]), [T,U], [t,u])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   926
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   927
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   928
fun add_ctyp ((v,ctyp), (sign_ref',vTs)) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   929
  let val Ctyp {T,sign_ref} = ctyp
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   930
  in (Sign.merge_refs(sign_ref,sign_ref'), (v,T)::vTs) end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   931
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   932
in
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   933
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   934
(*Left-to-right replacements: ctpairs = [...,(vi,ti),...].
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   935
  Instantiates distinct Vars by terms of same type.
8129
29e239c7b8c2 Thm.instantiate no longer normalizes, but Drule.instantiate does
paulson
parents: 8066
diff changeset
   936
  No longer normalizes the new theorem! *)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   937
fun instantiate ([], []) th = th
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   938
  | instantiate (vcTs,ctpairs) (th as Thm{sign_ref,der,maxidx,hyps,shyps,prop}) =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   939
  let val (newsign_ref,tpairs) = foldr add_ctpair (ctpairs, (sign_ref,[]));
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   940
      val (newsign_ref,vTs) = foldr add_ctyp (vcTs, (newsign_ref,[]));
8129
29e239c7b8c2 Thm.instantiate no longer normalizes, but Drule.instantiate does
paulson
parents: 8066
diff changeset
   941
      val newprop = subst_atomic tpairs
29e239c7b8c2 Thm.instantiate no longer normalizes, but Drule.instantiate does
paulson
parents: 8066
diff changeset
   942
	             (Type.inst_term_tvars
29e239c7b8c2 Thm.instantiate no longer normalizes, but Drule.instantiate does
paulson
parents: 8066
diff changeset
   943
		      (Sign.tsig_of (Sign.deref newsign_ref),vTs) prop)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   944
      val newth =
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   945
            (Thm{sign_ref = newsign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   946
                 der = Pt.infer_derivs' (Pt.instantiate vTs tpairs) der,
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   947
                 maxidx = maxidx_of_term newprop, 
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   948
                 shyps = add_insts_sorts ((vTs, tpairs), shyps),
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   949
                 hyps = hyps,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   950
                 prop = newprop})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   951
  in  if not(instl_ok(map #1 tpairs))
193
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
   952
      then raise THM("instantiate: variables not distinct", 0, [th])
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
   953
      else if not(null(findrep(map #1 vTs)))
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
   954
      then raise THM("instantiate: type variables not distinct", 0, [th])
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
   955
      else nodup_vars newth "instantiate"
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   956
  end
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   957
  handle TERM _ => raise THM("instantiate: incompatible signatures", 0, [th])
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   958
       | TYPE (msg, _, _) => raise THM (msg, 0, [th]);
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   959
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   960
end;
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   961
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   962
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   963
(*The trivial implication A==>A, justified by assume and forall rules.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   964
  A can contain Vars, not so for assume!   *)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   965
fun trivial ct : thm =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   966
  let val Cterm {sign_ref, t=A, T, maxidx} = ct
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   967
  in  if T<>propT then
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   968
            raise THM("trivial: the term must have type prop", 0, [])
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   969
      else fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   970
        (Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   971
             der = Pt.infer_derivs' I (false, Pt.AbsP ("H", None, Pt.PBound 0)),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   972
             maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   973
             shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   974
             hyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   975
             prop = implies$A$A})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   976
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   977
1503
7dba648ee25c Elimination of fully-functorial style.
paulson
parents: 1495
diff changeset
   978
(*Axiom-scheme reflecting signature contents: "OFCLASS(?'a::c, c_class)" *)
6368
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   979
fun class_triv sign c =
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   980
  let val Cterm {sign_ref, t, maxidx, ...} =
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   981
    cterm_of sign (Logic.mk_inclass (TVar (("'a", 0), [c]), c))
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   982
      handle TERM (msg, _) => raise THM ("class_triv: " ^ msg, 0, []);
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
   983
  in
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   984
    fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   985
      (Thm {sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   986
            der = Pt.infer_derivs' I
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
   987
              (false, Pt.PAxm ("ProtoPure.class_triv:" ^ c, t, Some [])),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   988
            maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   989
            shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   990
            hyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   991
            prop = t})
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
   992
  end;
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
   993
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
   994
6786
0af1797d5315 varifyT': observe additional 'fixed' tfrees;
wenzelm
parents: 6539
diff changeset
   995
(* Replace all TFrees not fixed or in the hyps by new TVars *)
0af1797d5315 varifyT': observe additional 'fixed' tfrees;
wenzelm
parents: 6539
diff changeset
   996
fun varifyT' fixed (Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
12500
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
   997
  let
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
   998
    val tfrees = foldr add_term_tfree_names (hyps, fixed);
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
   999
    val (prop', al) = Type.varify (prop, tfrees);
1634
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
  1000
  in let val thm = (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1001
    Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1002
        der = Pt.infer_derivs' (Pt.varify_proof prop tfrees) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1003
        maxidx = Int.max(0,maxidx), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1004
        shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1005
        hyps = hyps,
12500
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
  1006
        prop = prop'}
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
  1007
     in (nodup_vars thm "varifyT", al) end
8291
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
  1008
(* this nodup_vars check can be removed if thms are guaranteed not to contain
5469b894f30b capply, cabs: Sign.nodup_vars;
wenzelm
parents: 8129
diff changeset
  1009
duplicate TVars with different sorts *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1010
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1011
12500
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
  1012
val varifyT = #1 o varifyT' [];
6786
0af1797d5315 varifyT': observe additional 'fixed' tfrees;
wenzelm
parents: 6539
diff changeset
  1013
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1014
(* Replace all TVars by new TFrees *)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1015
fun freezeT(Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
3410
98f59f455d57 freezeT now refers to Type.freeze_thaw
paulson
parents: 3061
diff changeset
  1016
  let val (prop',_) = Type.freeze_thaw prop
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1017
  in (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1018
    Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1019
        der = Pt.infer_derivs' (Pt.freezeT prop) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1020
        maxidx = maxidx_of_term prop',
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1021
        shyps = shyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1022
        hyps = hyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1023
        prop = prop'}
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1024
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1025
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1026
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1027
(*** Inference rules for tactics ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1028
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1029
(*Destruct proof state into constraints, other goals, goal(i), rest *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1030
fun dest_state (state as Thm{prop,...}, i) =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1031
  let val (tpairs,horn) = Logic.strip_flexpairs prop
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1032
  in  case  Logic.strip_prems(i, [], horn) of
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1033
          (B::rBs, C) => (tpairs, rev rBs, B, C)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1034
        | _ => raise THM("dest_state", i, [state])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1035
  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1036
  handle TERM _ => raise THM("dest_state", i, [state]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1037
309
3751567696bf restored the signature constraint :THM
lcp
parents: 305
diff changeset
  1038
(*Increment variables and parameters of orule as required for
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1039
  resolution with goal i of state. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1040
fun lift_rule (state, i) orule =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1041
  let val Thm{shyps=sshyps, prop=sprop, maxidx=smax, sign_ref=ssign_ref,...} = state
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1042
      val (Bi::_, _) = Logic.strip_prems(i, [], Logic.skip_flexpairs sprop)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1043
        handle TERM _ => raise THM("lift_rule", i, [orule,state])
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1044
      val ct_Bi = Cterm {sign_ref=ssign_ref, maxidx=smax, T=propT, t=Bi}
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1045
      val (lift_abs,lift_all) = Logic.lift_fns(Bi,smax+1)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1046
      val (Thm{sign_ref, der, maxidx,shyps,hyps,prop}) = orule
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1047
      val (tpairs,As,B) = Logic.strip_horn prop
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1048
  in  (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1049
      Thm{sign_ref = merge_thm_sgs(state,orule),
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1050
          der = Pt.infer_derivs' (Pt.lift_proof Bi (smax+1) prop) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1051
          maxidx = maxidx+smax+1,
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
  1052
          shyps=union_sort(sshyps,shyps), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1053
          hyps=hyps, 
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1054
          prop = Logic.rule_of (map (pairself lift_abs) tpairs,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1055
                                map lift_all As,    
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1056
                                lift_all B)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1057
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1058
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1059
fun incr_indexes i (thm as Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1060
  if i < 0 then raise THM ("negative increment", 0, [thm]) else
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1061
  if i = 0 then thm else
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1062
    Thm {sign_ref = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1063
         der = Pt.infer_derivs' (Pt.map_proof_terms
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1064
           (Logic.incr_indexes ([], i)) (incr_tvar i)) der,
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1065
         maxidx = maxidx + i,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1066
         shyps = shyps,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1067
         hyps = hyps,
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1068
         prop = Logic.incr_indexes ([], i) prop};
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1069
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1070
(*Solve subgoal Bi of proof state B1...Bn/C by assumption. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1071
fun assumption i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1072
  let val Thm{sign_ref,der,maxidx,hyps,prop,...} = state;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1073
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1074
      fun newth n (env as Envir.Envir{maxidx, ...}, tpairs) =
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1075
        fix_shyps [state] (env_codT env)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1076
          (Thm{sign_ref = sign_ref, 
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1077
               der = Pt.infer_derivs'
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1078
                 ((if Envir.is_empty env then I else (Pt.norm_proof' env)) o
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1079
                   Pt.assumption_proof Bs Bi n) der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1080
               maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1081
               shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1082
               hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1083
               prop = 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1084
               if Envir.is_empty env then (*avoid wasted normalizations*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1085
                   Logic.rule_of (tpairs, Bs, C)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1086
               else (*normalize the new rule fully*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1087
                   Envir.norm_term env (Logic.rule_of (tpairs, Bs, C))});
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1088
      fun addprfs [] _ = Seq.empty
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1089
        | addprfs ((t,u)::apairs) n = Seq.make (fn()=> Seq.pull
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1090
             (Seq.mapp (newth n)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1091
                (Unify.unifiers(Sign.deref sign_ref,Envir.empty maxidx, (t,u)::tpairs))
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1092
                (addprfs apairs (n+1))))
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1093
  in  addprfs (Logic.assum_pairs Bi) 1 end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1094
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1095
(*Solve subgoal Bi of proof state B1...Bn/C by assumption.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1096
  Checks if Bi's conclusion is alpha-convertible to one of its assumptions*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1097
fun eq_assumption i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1098
  let val Thm{sign_ref,der,maxidx,hyps,prop,...} = state;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1099
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1100
  in  (case find_index (op aconv) (Logic.assum_pairs Bi) of
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1101
         (~1) => raise THM("eq_assumption", 0, [state])
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1102
       | n => fix_shyps [state] []
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1103
                (Thm{sign_ref = sign_ref, 
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1104
                     der = Pt.infer_derivs'
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1105
                       (Pt.assumption_proof Bs Bi (n+1)) der,
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1106
                     maxidx = maxidx,
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1107
                     shyps = [],
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1108
                     hyps = hyps,
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1109
                     prop = Logic.rule_of(tpairs, Bs, C)}))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1110
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1111
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1112
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1113
(*For rotate_tac: fast rotation of assumptions of subgoal i*)
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1114
fun rotate_rule k i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1115
  let val Thm{sign_ref,der,maxidx,hyps,prop,shyps} = state;
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1116
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
8066
54d37e491ac2 SOUNDNESS BUG FIX for rotate_rule. The original code did not expect
paulson
parents: 7921
diff changeset
  1117
      val params = Term.strip_all_vars Bi
54d37e491ac2 SOUNDNESS BUG FIX for rotate_rule. The original code did not expect
paulson
parents: 7921
diff changeset
  1118
      and rest   = Term.strip_all_body Bi
54d37e491ac2 SOUNDNESS BUG FIX for rotate_rule. The original code did not expect
paulson
parents: 7921
diff changeset
  1119
      val asms   = Logic.strip_imp_prems rest
54d37e491ac2 SOUNDNESS BUG FIX for rotate_rule. The original code did not expect
paulson
parents: 7921
diff changeset
  1120
      and concl  = Logic.strip_imp_concl rest
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1121
      val n      = length asms
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1122
      val m      = if k<0 then n+k else k
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1123
      val Bi'    = if 0=m orelse m=n then Bi
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1124
		   else if 0<m andalso m<n 
13629
a46362d2b19b take/drop -> splitAt
nipkow
parents: 13528
diff changeset
  1125
		   then let val (ps,qs) = splitAt(m,asms)
a46362d2b19b take/drop -> splitAt
nipkow
parents: 13528
diff changeset
  1126
                        in list_all(params, Logic.list_implies(qs @ ps, concl))
a46362d2b19b take/drop -> splitAt
nipkow
parents: 13528
diff changeset
  1127
			end
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1128
		   else raise THM("rotate_rule", k, [state])
7264
d55cd903c93d (*no fix_shyps*);
wenzelm
parents: 7248
diff changeset
  1129
  in  (*no fix_shyps*)
d55cd903c93d (*no fix_shyps*);
wenzelm
parents: 7248
diff changeset
  1130
      Thm{sign_ref = sign_ref, 
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1131
          der = Pt.infer_derivs' (Pt.rotate_proof Bs Bi m) der,
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1132
	  maxidx = maxidx,
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1133
	  shyps = shyps,
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1134
	  hyps = hyps,
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1135
	  prop = Logic.rule_of (tpairs, Bs @ [Bi'], C)}
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1136
  end;
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1137
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1138
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1139
(*Rotates a rule's premises to the left by k, leaving the first j premises
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1140
  unchanged.  Does nothing if k=0 or if k equals n-j, where n is the
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1141
  number of premises.  Useful with etac and underlies tactic/defer_tac*)
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1142
fun permute_prems j k rl =
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1143
  let val Thm{sign_ref,der,maxidx,hyps,prop,shyps} = rl
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1144
      val prems  = Logic.strip_imp_prems prop
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1145
      and concl  = Logic.strip_imp_concl prop
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1146
      val moved_prems = List.drop(prems, j)
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1147
      and fixed_prems = List.take(prems, j)
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1148
        handle Subscript => raise THM("permute_prems:j", j, [rl])
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1149
      val n_j    = length moved_prems
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1150
      val m = if k<0 then n_j + k else k
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1151
      val prop'  = if 0 = m orelse m = n_j then prop
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1152
		   else if 0<m andalso m<n_j 
13629
a46362d2b19b take/drop -> splitAt
nipkow
parents: 13528
diff changeset
  1153
		   then let val (ps,qs) = splitAt(m,moved_prems)
a46362d2b19b take/drop -> splitAt
nipkow
parents: 13528
diff changeset
  1154
			in Logic.list_implies(fixed_prems @ qs @ ps, concl) end
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1155
		   else raise THM("permute_prems:k", k, [rl])
7264
d55cd903c93d (*no fix_shyps*);
wenzelm
parents: 7248
diff changeset
  1156
  in  (*no fix_shyps*)
d55cd903c93d (*no fix_shyps*);
wenzelm
parents: 7248
diff changeset
  1157
      Thm{sign_ref = sign_ref, 
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1158
          der = Pt.infer_derivs' (Pt.permute_prems_prf prems j m) der,
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1159
	  maxidx = maxidx,
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1160
	  shyps = shyps,
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1161
	  hyps = hyps,
11563
e172cbed431d Fixed proof term bug in permute_prems.
berghofe
parents: 11518
diff changeset
  1162
	  prop = prop'}
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1163
  end;
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1164
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1165
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1166
(** User renaming of parameters in a subgoal **)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1167
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1168
(*Calls error rather than raising an exception because it is intended
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1169
  for top-level use -- exception handling would not make sense here.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1170
  The names in cs, if distinct, are used for the innermost parameters;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1171
   preceding parameters may be renamed to make all params distinct.*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1172
fun rename_params_rule (cs, i) state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1173
  let val Thm{sign_ref,der,maxidx,hyps,...} = state
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1174
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1175
      val iparams = map #1 (Logic.strip_params Bi)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1176
      val short = length iparams - length cs
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1177
      val newnames =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1178
            if short<0 then error"More names than abstractions!"
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1179
            else variantlist(take (short,iparams), cs) @ cs
3037
99ed078e6ae7 rename_params_rule used to check if the new name clashed with a free name in
nipkow
parents: 3012
diff changeset
  1180
      val freenames = map (#1 o dest_Free) (term_frees Bi)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1181
      val newBi = Logic.list_rename_params (newnames, Bi)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1182
  in
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1183
  case findrep cs of
3565
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1184
     c::_ => (warning ("Can't rename.  Bound variables not distinct: " ^ c); 
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1185
	      state)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1569
diff changeset
  1186
   | [] => (case cs inter_string freenames of
3565
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1187
       a::_ => (warning ("Can't rename.  Bound/Free variable clash: " ^ a); 
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1188
		state)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1189
     | [] => fix_shyps [state] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1190
                (Thm{sign_ref = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1191
                     der = der,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1192
                     maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1193
                     shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1194
                     hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1195
                     prop = Logic.rule_of(tpairs, Bs@[newBi], C)}))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1196
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1197
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1198
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1199
(*** Preservation of bound variable names ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1200
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1201
fun rename_boundvars pat obj (thm as Thm {sign_ref, der, maxidx, hyps, shyps, prop}) =
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1202
  (case Term.rename_abs pat obj prop of
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1203
    None => thm
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1204
  | Some prop' => Thm
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1205
      {sign_ref = sign_ref,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1206
       der = der,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1207
       maxidx = maxidx,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1208
       hyps = hyps,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1209
       shyps = shyps,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1210
       prop = prop'});
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1211
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1212
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1213
(* strip_apply f A(,B) strips off all assumptions/parameters from A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1214
   introduced by lifting over B, and applies f to remaining part of A*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1215
fun strip_apply f =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1216
  let fun strip(Const("==>",_)$ A1 $ B1,
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1217
                Const("==>",_)$ _  $ B2) = implies $ A1 $ strip(B1,B2)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1218
        | strip((c as Const("all",_)) $ Abs(a,T,t1),
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1219
                      Const("all",_)  $ Abs(_,_,t2)) = c$Abs(a,T,strip(t1,t2))
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1220
        | strip(A,_) = f A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1221
  in strip end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1222
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1223
(*Use the alist to rename all bound variables and some unknowns in a term
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1224
  dpairs = current disagreement pairs;  tpairs = permanent ones (flexflex);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1225
  Preserves unknowns in tpairs and on lhs of dpairs. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1226
fun rename_bvs([],_,_,_) = I
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1227
  | rename_bvs(al,dpairs,tpairs,B) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1228
    let val vars = foldr add_term_vars
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1229
                        (map fst dpairs @ map fst tpairs @ map snd tpairs, [])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1230
        (*unknowns appearing elsewhere be preserved!*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1231
        val vids = map (#1 o #1 o dest_Var) vars;
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1232
        fun rename(t as Var((x,i),T)) =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1233
                (case assoc(al,x) of
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1569
diff changeset
  1234
                   Some(y) => if x mem_string vids orelse y mem_string vids then t
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1235
                              else Var((y,i),T)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1236
                 | None=> t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1237
          | rename(Abs(x,T,t)) =
9721
7e51c9f3d5a0 *** empty log message ***
nipkow
parents: 9611
diff changeset
  1238
              Abs(if_none(assoc_string(al,x)) x, T, rename t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1239
          | rename(f$t) = rename f $ rename t
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1240
          | rename(t) = t;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1241
        fun strip_ren Ai = strip_apply rename (Ai,B)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1242
    in strip_ren end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1243
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1244
(*Function to rename bounds/unknowns in the argument, lifted over B*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1245
fun rename_bvars(dpairs, tpairs, B) =
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1246
        rename_bvs(foldr Term.match_bvars (dpairs,[]), dpairs, tpairs, B);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1247
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1248
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1249
(*** RESOLUTION ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1250
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1251
(** Lifting optimizations **)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1252
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1253
(*strip off pairs of assumptions/parameters in parallel -- they are
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1254
  identical because of lifting*)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1255
fun strip_assums2 (Const("==>", _) $ _ $ B1,
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1256
                   Const("==>", _) $ _ $ B2) = strip_assums2 (B1,B2)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1257
  | strip_assums2 (Const("all",_)$Abs(a,T,t1),
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1258
                   Const("all",_)$Abs(_,_,t2)) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1259
      let val (B1,B2) = strip_assums2 (t1,t2)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1260
      in  (Abs(a,T,B1), Abs(a,T,B2))  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1261
  | strip_assums2 BB = BB;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1262
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1263
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1264
(*Faster normalization: skip assumptions that were lifted over*)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1265
fun norm_term_skip env 0 t = Envir.norm_term env t
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1266
  | norm_term_skip env n (Const("all",_)$Abs(a,T,t)) =
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1267
        let val Envir.Envir{iTs, ...} = env
8407
d522ad1809e9 Envir now uses Vartab instead of association lists.
berghofe
parents: 8299
diff changeset
  1268
            val T' = typ_subst_TVars_Vartab iTs T
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1269
            (*Must instantiate types of parameters because they are flattened;
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1270
              this could be a NEW parameter*)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1271
        in  all T' $ Abs(a, T', norm_term_skip env n t)  end
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1272
  | norm_term_skip env n (Const("==>", _) $ A $ B) =
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1273
        implies $ A $ norm_term_skip env (n-1) B
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1274
  | norm_term_skip env n t = error"norm_term_skip: too few assumptions??";
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1275
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1276
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1277
(*Composition of object rule r=(A1...Am/B) with proof state s=(B1...Bn/C)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1278
  Unifies B with Bi, replacing subgoal i    (1 <= i <= n)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1279
  If match then forbid instantiations in proof state
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1280
  If lifted then shorten the dpair using strip_assums2.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1281
  If eres_flg then simultaneously proves A1 by assumption.
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1282
  nsubgoal is the number of new subgoals (written m above).
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1283
  Curried so that resolution calls dest_state only once.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1284
*)
4270
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
  1285
local exception COMPOSE
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1286
in
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1287
fun bicompose_aux match (state, (stpairs, Bs, Bi, C), lifted)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1288
                        (eres_flg, orule, nsubgoal) =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1289
 let val Thm{der=sder, maxidx=smax, shyps=sshyps, hyps=shyps, ...} = state
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1290
     and Thm{der=rder, maxidx=rmax, shyps=rshyps, hyps=rhyps, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1291
             prop=rprop,...} = orule
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1292
         (*How many hyps to skip over during normalization*)
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1293
     and nlift = Logic.count_prems(strip_all_body Bi,
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1294
                                   if eres_flg then ~1 else 0)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1295
     val sign_ref = merge_thm_sgs(state,orule);
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1296
     val sign = Sign.deref sign_ref;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1297
     (** Add new theorem with prop = '[| Bs; As |] ==> C' to thq **)
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1298
     fun addth A (As, oldAs, rder', n) ((env as Envir.Envir {maxidx, ...}, tpairs), thq) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1299
       let val normt = Envir.norm_term env;
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1300
           (*perform minimal copying here by examining env*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1301
           val normp =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1302
             if Envir.is_empty env then (tpairs, Bs @ As, C)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1303
             else
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1304
             let val ntps = map (pairself normt) tpairs
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
  1305
             in if Envir.above (smax, env) then
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1306
                  (*no assignments in state; normalize the rule only*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1307
                  if lifted
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1308
                  then (ntps, Bs @ map (norm_term_skip env nlift) As, C)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1309
                  else (ntps, Bs @ map normt As, C)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1310
                else if match then raise COMPOSE
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1311
                else (*normalize the new rule fully*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1312
                  (ntps, map normt (Bs @ As), normt C)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1313
             end
1258
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
  1314
           val th = (*tuned fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1315
             Thm{sign_ref = sign_ref,
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1316
                 der = Pt.infer_derivs
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1317
                   ((if Envir.is_empty env then I
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1318
                     else if Envir.above (smax, env) then
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1319
                       (fn f => fn der => f (Pt.norm_proof' env der))
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1320
                     else
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1321
                       curry op oo (Pt.norm_proof' env))
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1322
                    (Pt.bicompose_proof Bs oldAs As A n)) rder' sder,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1323
                 maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1324
                 shyps = add_env_sorts (env, union_sort(rshyps,sshyps)),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1325
                 hyps = union_term(rhyps,shyps),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1326
                 prop = Logic.rule_of normp}
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1327
        in  Seq.cons(th, thq)  end  handle COMPOSE => thq;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1328
     val (rtpairs,rhorn) = Logic.strip_flexpairs(rprop);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1329
     val (rAs,B) = Logic.strip_prems(nsubgoal, [], rhorn)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1330
       handle TERM _ => raise THM("bicompose: rule", 0, [orule,state]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1331
     (*Modify assumptions, deleting n-th if n>0 for e-resolution*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1332
     fun newAs(As0, n, dpairs, tpairs) =
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1333
       let val (As1, rder') =
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1334
         if !Logic.auto_rename orelse not lifted then (As0, rder)
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1335
         else (map (rename_bvars(dpairs,tpairs,B)) As0,
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1336
           Pt.infer_derivs' (Pt.map_proof_terms
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1337
             (rename_bvars (dpairs, tpairs, Bound 0)) I) rder);
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1338
       in (map (Logic.flatten_params n) As1, As1, rder', n)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1339
          handle TERM _ =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1340
          raise THM("bicompose: 1st premise", 0, [orule])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1341
       end;
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
  1342
     val env = Envir.empty(Int.max(rmax,smax));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1343
     val BBi = if lifted then strip_assums2(B,Bi) else (B,Bi);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1344
     val dpairs = BBi :: (rtpairs@stpairs);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1345
     (*elim-resolution: try each assumption in turn.  Initially n=1*)
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1346
     fun tryasms (_, _, _, []) = Seq.empty
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
parents: 10767
diff changeset
  1347
       | tryasms (A, As, n, (t,u)::apairs) =
4270
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254