src/Pure/thm.ML
author wenzelm
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added cgoal_of; simplified lift_rule: take goal cterm instead of goal state thm, use Logic.lift_abs/all;
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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 very core of Isabelle's Meta Logic: certified types and terms,
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meta 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 ->
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   {thy: theory,
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    sign: theory,       (*obsolete*)
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    T: typ,
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    sorts: sort list}
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  val theory_of_ctyp: ctyp -> theory
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  val typ_of: ctyp -> typ
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  val ctyp_of: theory -> typ -> ctyp
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  val read_ctyp: theory -> 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 ->
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   {thy: theory,
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    sign: theory,       (*obsolete*)
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    t: term,
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    T: typ,
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    maxidx: int,
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    sorts: sort list}
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  val crep_cterm: cterm ->
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    {thy: theory, sign: theory, t: term, T: ctyp, maxidx: int, sorts: sort list}
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  val theory_of_cterm: cterm -> theory
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  val sign_of_cterm: cterm -> theory    (*obsolete*)
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  val term_of: cterm -> term
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  val cterm_of: theory -> term -> cterm
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  val ctyp_of_term: cterm -> ctyp
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  val read_cterm: theory -> string * typ -> cterm
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  val adjust_maxidx: cterm -> cterm
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  val read_def_cterm:
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    theory * (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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    theory * (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 ->
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   {thy: theory,
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    sign: theory,       (*obsolete*)
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    der: bool * Proofterm.proof,
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    maxidx: int,
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    shyps: sort list,
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    hyps: term list,
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    tpairs: (term * term) list,
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    prop: term}
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  val crep_thm: thm ->
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   {thy: theory,
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    sign: theory,       (*obsolete*)
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    der: bool * Proofterm.proof,
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    maxidx: int,
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    shyps: sort list,
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    hyps: cterm list,
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    tpairs: (cterm * 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 eq_thms: thm list * thm list -> bool
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  val theory_of_thm: thm -> theory
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  val sign_of_thm: thm -> theory    (*obsolete*)
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  val prop_of: thm -> term
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  val proof_of: thm -> Proofterm.proof
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  val tpairs_of: thm -> (term * term) list
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  val concl_of: thm -> term
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  val prems_of: thm -> term list
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  val nprems_of: thm -> int
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  val cprop_of: thm -> cterm
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  val cgoal_of: thm -> int -> cterm
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  val transfer: theory -> thm -> thm
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  val weaken: cterm -> thm -> thm
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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_i: theory -> string -> 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 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 flexflex_rule: thm -> thm Seq.seq
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  val instantiate: (ctyp * ctyp) list * (cterm * cterm) list -> thm -> thm
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  val trivial: cterm -> thm
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  val class_triv: theory -> class -> thm
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  val varifyT: thm -> thm
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  val varifyT': (string * sort) list -> thm -> thm * ((string * sort) * indexname) list
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  val freezeT: thm -> thm
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  val dest_state: thm * int -> (term * term) list * term list * term * term
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  val lift_rule: cterm -> 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 -> int -> thm -> thm Seq.seq
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  val biresolution: bool -> (bool * thm) list -> int -> thm -> thm Seq.seq
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  val invoke_oracle: theory -> xstring -> theory * Object.T -> thm
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  val invoke_oracle_i: theory -> string -> theory * 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_ctyp: ctyp -> ctyp list
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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 list
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  val simple_fact: 'a -> ('a * 'b list) 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 terms_of_tpairs: (term * term) list -> term list
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  val full_prop_of: thm -> term
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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 compress: thm -> thm
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  val adjust_maxidx_thm: thm -> thm
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  val rename_boundvars: term -> term -> thm -> thm
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  val cterm_match: cterm * cterm -> (ctyp * ctyp) list * (cterm * cterm) list
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  val cterm_first_order_match: cterm * cterm -> (ctyp * 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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(** collect occurrences of sorts -- unless all sorts non-empty **)
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fun may_insert_typ_sorts thy T = if Sign.all_sorts_nonempty thy then I else Sorts.insert_typ T;
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fun may_insert_term_sorts thy t = if Sign.all_sorts_nonempty thy then I else Sorts.insert_term t;
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(*NB: type unification may invent new sorts*)
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fun may_insert_env_sorts thy (env as Envir.Envir {iTs, ...}) =
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  if Sign.all_sorts_nonempty thy then I
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  else Vartab.fold (fn (_, (_, T)) => Sorts.insert_typ T) iTs;
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(** certified types **)
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datatype ctyp = Ctyp of {thy_ref: theory_ref, T: typ, sorts: sort list};
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fun rep_ctyp (Ctyp {thy_ref, T, sorts}) =
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  let val thy = Theory.deref thy_ref
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  in {thy = thy, sign = thy, T = T, sorts = sorts} end;
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fun theory_of_ctyp (Ctyp {thy_ref, ...}) = Theory.deref thy_ref;
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fun typ_of (Ctyp {T, ...}) = T;
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fun ctyp_of thy raw_T =
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  let val T = Sign.certify_typ thy raw_T
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  in Ctyp {thy_ref = Theory.self_ref thy, T = T, sorts = may_insert_typ_sorts thy T []} end;
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fun read_ctyp thy s =
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  let val T = Sign.read_typ (thy, K NONE) s
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  in Ctyp {thy_ref = Theory.self_ref thy, T = T, sorts = may_insert_typ_sorts thy T []} end;
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fun dest_ctyp (Ctyp {thy_ref, T = Type (s, Ts), sorts}) =
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      map (fn T => Ctyp {thy_ref = thy_ref, T = T, sorts = sorts}) Ts
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  | dest_ctyp cT = raise TYPE ("dest_ctyp", [typ_of cT], []);
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(** certified terms **)
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(*certified terms with checked typ, maxidx, and sorts*)
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datatype cterm = Cterm of
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 {thy_ref: theory_ref,
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  t: term,
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  T: typ,
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  maxidx: int,
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  sorts: sort list};
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exception CTERM of string;
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fun rep_cterm (Cterm {thy_ref, t, T, maxidx, sorts}) =
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  let val thy =  Theory.deref thy_ref
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  in {thy = thy, sign = thy, t = t, T = T, maxidx = maxidx, sorts = sorts} end;
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fun crep_cterm (Cterm {thy_ref, t, T, maxidx, sorts}) =
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  let val thy = Theory.deref thy_ref in
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   {thy = thy, sign = thy, t = t, T = Ctyp {thy_ref = thy_ref, T = T, sorts = sorts},
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    maxidx = maxidx, sorts = sorts}
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  end;
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fun theory_of_cterm (Cterm {thy_ref, ...}) = Theory.deref thy_ref;
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val sign_of_cterm = theory_of_cterm;
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fun term_of (Cterm {t, ...}) = t;
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fun ctyp_of_term (Cterm {thy_ref, T, sorts, ...}) =
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  Ctyp {thy_ref = thy_ref, T = T, sorts = sorts};
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fun cterm_of thy tm =
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  let
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    val (t, T, maxidx) = Sign.certify_term (Sign.pp thy) thy tm;
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    val sorts = may_insert_term_sorts thy t [];
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  in Cterm {thy_ref = Theory.self_ref thy, t = t, T = T, maxidx = maxidx, sorts = sorts} end;
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fun merge_thys0 (Cterm {thy_ref = r1, ...}) (Cterm {thy_ref = r2, ...}) =
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  Theory.merge_refs (r1, r2);
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(*Destruct application in cterms*)
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fun dest_comb (Cterm {t = t $ u, T, thy_ref, maxidx, sorts}) =
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      let val A = Term.argument_type_of t in
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        (Cterm {t = t, T = A --> T, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts},
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         Cterm {t = u, T = A, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts})
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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 {t = Abs (x, T, t), T = Type ("fun", [_, U]), thy_ref, maxidx, sorts}) =
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      let val (y', t') = Term.dest_abs (if_none a x, T, t) in
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        (Cterm {t = Free (y', T), T = T, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts},
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          Cterm {t = t', T = U, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts})
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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 {thy_ref, t, T, maxidx, sorts}) =
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  if maxidx = ~1 then ct
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  else Cterm {thy_ref = thy_ref, t = t, T = T, maxidx = maxidx_of_term t, sorts = sorts};
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(*Form cterm out of a function and an argument*)
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fun capply
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  (cf as Cterm {t = f, T = Type ("fun", [dty, rty]), maxidx = maxidx1, sorts = sorts1, ...})
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  (cx as Cterm {t = x, T, maxidx = maxidx2, sorts = sorts2, ...}) =
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    if T = dty then
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      Cterm {thy_ref = merge_thys0 cf cx,
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        t = f $ x,
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        T = rty,
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        maxidx = Int.max (maxidx1, maxidx2),
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        sorts = Sorts.union sorts1 sorts2}
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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
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  (ct1 as Cterm {t = t1, T = T1, maxidx = maxidx1, sorts = sorts1, ...})
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  (ct2 as Cterm {t = t2, T = T2, maxidx = maxidx2, sorts = sorts2, ...}) =
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    let val t = lambda t1 t2 handle TERM _ => raise CTERM "cabs: first arg is not a variable" in
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      Cterm {thy_ref = merge_thys0 ct1 ct2,
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        t = t, T = T1 --> T2,
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        maxidx = Int.max (maxidx1, maxidx2),
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        sorts = Sorts.union sorts1 sorts2}
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    end;
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(*Matching of cterms*)
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fun gen_cterm_match match
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    (ct1 as Cterm {t = t1, maxidx = maxidx1, sorts = sorts1, ...},
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     ct2 as Cterm {t = t2, maxidx = maxidx2, sorts = sorts2, ...}) =
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  let
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    val thy_ref = merge_thys0 ct1 ct2;
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    val (Tinsts, tinsts) = match (Theory.deref thy_ref) (t1, t2);
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    val maxidx = Int.max (maxidx1, maxidx2);
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    val sorts = Sorts.union sorts1 sorts2;
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   298
    fun mk_cTinst (ixn, (S, T)) =
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      (Ctyp {T = TVar (ixn, S), thy_ref = thy_ref, sorts = sorts},
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       Ctyp {T = T, thy_ref = thy_ref, sorts = sorts});
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    fun mk_ctinst (ixn, (T, t)) =
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      let val T = Envir.typ_subst_TVars Tinsts T in
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        (Cterm {t = Var (ixn, T), T = T, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts},
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         Cterm {t = t, T = T, thy_ref = thy_ref, maxidx = maxidx, sorts = sorts})
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   305
      end;
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  in (Vartab.fold (cons o mk_cTinst) Tinsts [], Vartab.fold (cons o mk_ctinst) tinsts []) end;
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5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
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val cterm_match = gen_cterm_match Pattern.match;
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diff changeset
   309
val cterm_first_order_match = gen_cterm_match Pattern.first_order_match;
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5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
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(*Incrementing indexes*)
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fun cterm_incr_indexes i (ct as Cterm {thy_ref, t, T, maxidx, sorts}) =
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  if i < 0 then raise CTERM "negative increment"
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   314
  else if i = 0 then ct
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  else Cterm {thy_ref = thy_ref, t = Logic.incr_indexes ([], i) t,
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    T = Logic.incr_tvar i T, maxidx = maxidx + i, sorts = sorts};
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   317
2509
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   318
0a7169d89b7a added termless parameter;
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diff changeset
   319
574
810da101bad2 read_def_cterm: minor changes;
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   320
(** read cterms **)   (*exception ERROR*)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
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parents: 242
diff changeset
   321
4281
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   322
(*read terms, infer types, certify terms*)
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   323
fun read_def_cterms (thy, types, sorts) used freeze sTs =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
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diff changeset
   324
  let
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   325
    val (ts', tye) = Sign.read_def_terms (thy, types, sorts) used freeze sTs;
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diff changeset
   326
    val cts = map (cterm_of thy) ts'
2979
db6941221197 improved type check error messages;
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   327
      handle TYPE (msg, _, _) => error msg
2386
58f8ff014009 fixed warning;
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diff changeset
   328
           | TERM (msg, _) => error msg;
4281
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parents: 4270
diff changeset
   329
  in (cts, tye) end;
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diff changeset
   330
6c6073b13600 Added read_def_cterms for simultaneous reading/typing of terms under
nipkow
parents: 4270
diff changeset
   331
(*read term, infer types, certify term*)
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diff changeset
   332
fun read_def_cterm args used freeze aT =
6c6073b13600 Added read_def_cterms for simultaneous reading/typing of terms under
nipkow
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diff changeset
   333
  let val ([ct],tye) = read_def_cterms args used freeze [aT]
6c6073b13600 Added read_def_cterms for simultaneous reading/typing of terms under
nipkow
parents: 4270
diff changeset
   334
  in (ct,tye) end;
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   335
16425
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diff changeset
   336
fun read_cterm thy = #1 o read_def_cterm (thy, K NONE, K NONE) [] true;
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   337
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
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diff changeset
   338
6089
4d2d5556b4f9 signature BASIC_THM;
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   339
(*tags provide additional comment, apart from the axiom/theorem name*)
4d2d5556b4f9 signature BASIC_THM;
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   340
type tag = string * string list;
4d2d5556b4f9 signature BASIC_THM;
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   341
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   342
387
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   343
(*** Meta theorems ***)
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   344
11518
5f2616a1c10a Replaced old derivations by proof terms.
berghofe
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   345
structure Pt = Proofterm;
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   346
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datatype thm = Thm of
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 {thy_ref: theory_ref,         (*dynamic reference to theory*)
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  der: bool * Pt.proof,        (*derivation*)
3967
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  maxidx: int,                 (*maximum index of any Var or TVar*)
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  shyps: sort list,            (*sort hypotheses as ordered list*)
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  hyps: term list,             (*hypotheses as ordered list*)
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
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  tpairs: (term * term) list,  (*flex-flex pairs*)
3967
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  prop: term};                 (*conclusion*)
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a5a9c433f639 Initial revision
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   356
(*errors involving theorems*)
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   357
exception THM of string * int * thm list;
13658
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berghofe
parents: 13642
diff changeset
   358
16425
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   359
fun rep_thm (Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
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diff changeset
   360
  let val thy = Theory.deref thy_ref in
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diff changeset
   361
   {thy = thy, sign = thy, der = der, maxidx = maxidx,
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   362
    shyps = shyps, hyps = hyps, tpairs = tpairs, prop = prop}
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   363
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   364
16425
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diff changeset
   365
(*version of rep_thm returning cterms instead of terms*)
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diff changeset
   366
fun crep_thm (Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   367
  let
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diff changeset
   368
    val thy = Theory.deref thy_ref;
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diff changeset
   369
    fun cterm max t = Cterm {thy_ref = thy_ref, t = t, T = propT, maxidx = max, sorts = shyps};
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2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   370
  in
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   371
   {thy = thy, sign = thy, der = der, maxidx = maxidx, shyps = shyps,
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   372
    hyps = map (cterm ~1) hyps,
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   373
    tpairs = map (pairself (cterm maxidx)) tpairs,
2427be27cc60 accomodate identification of type Sign.sg and theory;
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diff changeset
   374
    prop = cterm maxidx prop}
1517
d2f865740d8e added cabs and crep_thm
clasohm
parents: 1516
diff changeset
   375
  end;
d2f865740d8e added cabs and crep_thm
clasohm
parents: 1516
diff changeset
   376
16725
597830f91930 added full_prop_of: includes tpairs;
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diff changeset
   377
fun terms_of_tpairs tpairs = fold_rev (fn (t, u) => cons t o cons u) tpairs [];
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diff changeset
   378
597830f91930 added full_prop_of: includes tpairs;
wenzelm
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diff changeset
   379
fun eq_tpairs ((t, u), (t', u')) = t aconv t' andalso u aconv u';
597830f91930 added full_prop_of: includes tpairs;
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diff changeset
   380
val union_tpairs = gen_merge_lists eq_tpairs;
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
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parents: 16847
diff changeset
   381
val maxidx_tpairs = fold (fn (t, u) => Term.maxidx_term t #> Term.maxidx_term u);
16725
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
   382
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
   383
fun attach_tpairs tpairs prop =
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
   384
  Logic.list_implies (map Logic.mk_equals tpairs, prop);
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
   385
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
   386
fun full_prop_of (Thm {tpairs, prop, ...}) = attach_tpairs tpairs prop;
16945
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   387
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   388
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   389
(* merge theories of cterms/thms; raise exception if incompatible *)
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   390
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   391
fun merge_thys1 (Cterm {thy_ref = r1, ...}) (th as Thm {thy_ref = r2, ...}) =
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   392
  Theory.merge_refs (r1, r2) handle TERM (msg, _) => raise THM (msg, 0, [th]);
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   393
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   394
fun merge_thys2 (th1 as Thm {thy_ref = r1, ...}) (th2 as Thm {thy_ref = r2, ...}) =
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   395
  Theory.merge_refs (r1, r2) handle TERM (msg, _) => raise THM (msg, 0, [th1, th2]);
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   396
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   397
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   398
(*attributes subsume any kind of rules or context modifiers*)
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   399
type 'a attribute = 'a * thm -> 'a * thm;
17708
6c6ecafd8c0e abstract_rule: tuned exception msgs;
wenzelm
parents: 17412
diff changeset
   400
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   401
fun no_attributes x = (x, []);
17345
9ea1e2179786 added simple_fact;
wenzelm
parents: 17221
diff changeset
   402
fun simple_fact x = [(x, [])];
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   403
fun apply_attributes (x_th, atts) = Library.apply atts x_th;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   404
fun applys_attributes (x_ths, atts) = foldl_map (Library.apply atts) x_ths;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   405
16601
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wenzelm
parents: 16425
diff changeset
   406
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   407
(* hyps *)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   408
16945
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   409
val insert_hyps = OrdList.insert Term.fast_term_ord;
16679
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   410
val remove_hyps = OrdList.remove Term.fast_term_ord;
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   411
val union_hyps = OrdList.union Term.fast_term_ord;
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   412
val eq_set_hyps = OrdList.eq_set Term.fast_term_ord;
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   413
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   414
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   415
(* eq_thm(s) *)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   416
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   417
fun eq_thm (th1, th2) =
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   418
  let
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   419
    val {thy = thy1, shyps = shyps1, hyps = hyps1, tpairs = tpairs1, prop = prop1, ...} =
9031
8f75b9ce2f06 fixed Thm.eq_thm: use Sign.joinable;
wenzelm
parents: 8854
diff changeset
   420
      rep_thm th1;
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   421
    val {thy = thy2, shyps = shyps2, hyps = hyps2, tpairs = tpairs2, prop = prop2, ...} =
9031
8f75b9ce2f06 fixed Thm.eq_thm: use Sign.joinable;
wenzelm
parents: 8854
diff changeset
   422
      rep_thm th2;
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   423
  in
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   424
    Context.joinable (thy1, thy2) andalso
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   425
    Sorts.eq_set (shyps1, shyps2) andalso
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   426
    eq_set_hyps (hyps1, hyps2) andalso
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   427
    equal_lists eq_tpairs (tpairs1, tpairs2) andalso
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   428
    prop1 aconv prop2
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   429
  end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   430
16135
c66545fe72bf added eq_thms;
wenzelm
parents: 16024
diff changeset
   431
val eq_thms = Library.equal_lists eq_thm;
c66545fe72bf added eq_thms;
wenzelm
parents: 16024
diff changeset
   432
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   433
fun theory_of_thm (Thm {thy_ref, ...}) = Theory.deref thy_ref;
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   434
val sign_of_thm = theory_of_thm;
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   435
12803
37131c76dff6 added prop_of: thm -> term (at last!);
wenzelm
parents: 12500
diff changeset
   436
fun prop_of (Thm {prop, ...}) = prop;
13528
d14fb18343cb added proof_of;
wenzelm
parents: 12982
diff changeset
   437
fun proof_of (Thm {der = (_, proof), ...}) = proof;
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   438
fun tpairs_of (Thm {tpairs, ...}) = tpairs;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   439
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   440
val concl_of = Logic.strip_imp_concl o prop_of;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   441
val prems_of = Logic.strip_imp_prems o prop_of;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   442
fun nprems_of th = Logic.count_prems (prop_of th, 0);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   443
val no_prems = equal 0 o nprems_of;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   444
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   445
fun major_prem_of th =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   446
  (case prems_of th of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   447
    prem :: _ => Logic.strip_assums_concl prem
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   448
  | [] => raise THM ("major_prem_of: rule with no premises", 0, [th]));
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   449
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   450
(*the statement of any thm is a cterm*)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   451
fun cprop_of (Thm {thy_ref, maxidx, shyps, prop, ...}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   452
  Cterm {thy_ref = thy_ref, maxidx = maxidx, T = propT, t = prop, sorts = shyps};
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   453
18035
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
   454
fun cgoal_of (th as Thm {thy_ref, maxidx, shyps, prop, ...}) i =
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
   455
  Cterm {thy_ref = thy_ref, maxidx = maxidx, T = propT, sorts = shyps,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
   456
    t = Logic.nth_prem (i, prop) handle TERM _ => raise THM ("cgoal_of", i, [th])};
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
   457
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   458
(*explicit transfer to a super theory*)
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   459
fun transfer thy' thm =
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   460
  let
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   461
    val Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop} = thm;
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   462
    val thy = Theory.deref thy_ref;
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   463
  in
16945
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   464
    if not (subthy (thy, thy')) then
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   465
      raise THM ("transfer: not a super theory", 0, [thm])
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   466
    else if eq_thy (thy, thy') then thm
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   467
    else
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   468
      Thm {thy_ref = Theory.self_ref thy',
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   469
        der = der,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   470
        maxidx = maxidx,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   471
        shyps = shyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   472
        hyps = hyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   473
        tpairs = tpairs,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   474
        prop = prop}
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   475
  end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   476
16945
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   477
(*explicit weakening: maps |- B to A |- B*)
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   478
fun weaken raw_ct th =
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   479
  let
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   480
    val ct as Cterm {t = A, T, sorts, maxidx = maxidxA, ...} = adjust_maxidx raw_ct;
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   481
    val Thm {der, maxidx, shyps, hyps, tpairs, prop, ...} = th;
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   482
  in
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   483
    if T <> propT then
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   484
      raise THM ("weaken: assumptions must have type prop", 0, [])
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   485
    else if maxidxA <> ~1 then
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   486
      raise THM ("weaken: assumptions may not contain schematic variables", maxidxA, [])
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   487
    else
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   488
      Thm {thy_ref = merge_thys1 ct th,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   489
        der = der,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   490
        maxidx = maxidx,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   491
        shyps = Sorts.union sorts shyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   492
        hyps = insert_hyps A hyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   493
        tpairs = tpairs,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   494
        prop = prop}
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   495
  end;
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   496
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   497
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   498
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   499
(** sort contexts of theorems **)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   500
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   501
fun present_sorts (Thm {hyps, tpairs, prop, ...}) =
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   502
  fold (fn (t, u) => Sorts.insert_term t o Sorts.insert_term u) tpairs
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   503
    (Sorts.insert_terms hyps (Sorts.insert_term prop []));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   504
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   505
(*remove extra sorts that are non-empty by virtue of type signature information*)
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   506
fun strip_shyps (thm as Thm {shyps = [], ...}) = thm
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   507
  | strip_shyps (thm as Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   508
      let
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   509
        val thy = Theory.deref thy_ref;
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   510
        val shyps' =
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   511
          if Sign.all_sorts_nonempty thy then []
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   512
          else
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   513
            let
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   514
              val present = present_sorts thm;
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   515
              val extra = Sorts.subtract present shyps;
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   516
              val witnessed = map #2 (Sign.witness_sorts thy present extra);
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   517
            in Sorts.subtract witnessed shyps end;
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   518
      in
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   519
        Thm {thy_ref = thy_ref, der = der, maxidx = maxidx,
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   520
          shyps = shyps', hyps = hyps, tpairs = tpairs, prop = prop}
7642
40d912f78db8 removed implies_intr_shyps;
wenzelm
parents: 7534
diff changeset
   521
      end;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   522
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   523
(*dangling sort constraints of a thm*)
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   524
fun extra_shyps (th as Thm {shyps, ...}) = Sorts.subtract (present_sorts th) shyps;
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   525
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   526
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   527
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   528
(** Axioms **)
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   529
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   530
(*look up the named axiom in the theory or its ancestors*)
15672
32aea1e31eb8 added get_axiom_i, invoke_oracle_i;
wenzelm
parents: 15574
diff changeset
   531
fun get_axiom_i theory name =
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   532
  let
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   533
    fun get_ax thy =
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17345
diff changeset
   534
      Symtab.lookup (#2 (#axioms (Theory.rep_theory thy))) name
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   535
      |> Option.map (fn prop =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   536
          Thm {thy_ref = Theory.self_ref thy,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   537
            der = Pt.infer_derivs' I (false, Pt.axm_proof name prop),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   538
            maxidx = maxidx_of_term prop,
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   539
            shyps = may_insert_term_sorts thy prop [],
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   540
            hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   541
            tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   542
            prop = prop});
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   543
  in
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   544
    (case get_first get_ax (theory :: Theory.ancestors_of theory) of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
   545
      SOME thm => thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
   546
    | NONE => raise THEORY ("No axiom " ^ quote name, [theory]))
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   547
  end;
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   548
16352
d7f9978e5752 axioms: NameSpace.table;
wenzelm
parents: 16287
diff changeset
   549
fun get_axiom thy =
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   550
  get_axiom_i thy o NameSpace.intern (Theory.axiom_space thy);
15672
32aea1e31eb8 added get_axiom_i, invoke_oracle_i;
wenzelm
parents: 15574
diff changeset
   551
6368
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   552
fun def_name name = name ^ "_def";
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
   553
fun get_def thy = get_axiom thy o def_name;
4847
ea7d7a65e4e9 tuned get_ax (uses ancestry);
wenzelm
parents: 4820
diff changeset
   554
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   555
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   556
(*return additional axioms of this theory node*)
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   557
fun axioms_of thy =
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   558
  map (fn (s, _) => (s, get_axiom thy s))
16352
d7f9978e5752 axioms: NameSpace.table;
wenzelm
parents: 16287
diff changeset
   559
    (Symtab.dest (#2 (#axioms (Theory.rep_theory thy))));
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   560
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   561
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   562
(* name and tags -- make proof objects more readable *)
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   563
12923
9ba7c5358fa0 fixed get_name_tags in order to work with hyps;
wenzelm
parents: 12803
diff changeset
   564
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
   565
  Pt.get_name_tags hyps prop prf;
4018
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   566
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   567
fun put_name_tags x (Thm {thy_ref, der = (ora, prf), maxidx,
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   568
      shyps, hyps, tpairs = [], prop}) = Thm {thy_ref = thy_ref,
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   569
        der = (ora, Pt.thm_proof (Theory.deref thy_ref) x hyps prop prf),
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
   570
        maxidx = maxidx, shyps = shyps, hyps = hyps, tpairs = [], prop = prop}
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
   571
  | put_name_tags _ thm =
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
   572
      raise THM ("put_name_tags: unsolved flex-flex constraints", 0, [thm]);
6089
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   573
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   574
val name_of_thm = #1 o get_name_tags;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   575
val tags_of_thm = #2 o get_name_tags;
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   576
4d2d5556b4f9 signature BASIC_THM;
wenzelm
parents: 5624
diff changeset
   577
fun name_thm (name, thm) = put_name_tags (name, tags_of_thm thm) thm;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   578
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   579
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   580
(*Compression of theorems -- a separate rule, not integrated with the others,
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   581
  as it could be slow.*)
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   582
fun compress (Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
16991
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   583
  let val thy = Theory.deref thy_ref in
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   584
    Thm {thy_ref = thy_ref,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   585
      der = der,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   586
      maxidx = maxidx,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   587
      shyps = shyps,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   588
      hyps = map (Compress.term thy) hyps,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   589
      tpairs = map (pairself (Compress.term thy)) tpairs,
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   590
      prop = Compress.term thy prop}
39f5760f72d7 Compress.term;
wenzelm
parents: 16945
diff changeset
   591
  end;
16945
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   592
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   593
fun adjust_maxidx_thm (Thm {thy_ref, der, shyps, hyps, tpairs, prop, ...}) =
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   594
  Thm {thy_ref = thy_ref,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   595
    der = der,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   596
    maxidx = maxidx_tpairs tpairs (maxidx_of_term prop),
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   597
    shyps = shyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   598
    hyps = hyps,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   599
    tpairs = tpairs,
5d3ae25673a8 added weaken, adjust_maxidx_thm;
wenzelm
parents: 16884
diff changeset
   600
    prop = prop};
564
eec3a9222b50 added inferT_axm;
wenzelm
parents: 480
diff changeset
   601
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   602
2509
0a7169d89b7a added termless parameter;
wenzelm
parents: 2386
diff changeset
   603
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   604
(*** Meta rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   605
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   606
(** primitive rules **)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   607
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   608
(*The assumption rule A |- A*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   609
fun assume raw_ct =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   610
  let val Cterm {thy_ref, t = prop, T, maxidx, sorts} = adjust_maxidx raw_ct in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   611
    if T <> propT then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   612
      raise THM ("assume: assumptions must have type prop", 0, [])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   613
    else if maxidx <> ~1 then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   614
      raise THM ("assume: assumptions may not contain schematic variables", maxidx, [])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   615
    else Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   616
      der = Pt.infer_derivs' I (false, Pt.Hyp prop),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   617
      maxidx = ~1,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   618
      shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   619
      hyps = [prop],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   620
      tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   621
      prop = prop}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   622
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   623
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   624
(*Implication introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   625
    [A]
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   626
     :
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   627
     B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   628
  -------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   629
  A ==> B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   630
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   631
fun implies_intr
16679
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   632
    (ct as Cterm {t = A, T, maxidx = maxidxA, sorts, ...})
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   633
    (th as Thm {der, maxidx, hyps, shyps, tpairs, prop, ...}) =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   634
  if T <> propT then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   635
    raise THM ("implies_intr: assumptions must have type prop", 0, [th])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   636
  else
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   637
    Thm {thy_ref = merge_thys1 ct th,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   638
      der = Pt.infer_derivs' (Pt.implies_intr_proof A) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   639
      maxidx = Int.max (maxidxA, maxidx),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   640
      shyps = Sorts.union sorts shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   641
      hyps = remove_hyps A hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   642
      tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   643
      prop = implies $ A $ prop};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   644
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   645
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   646
(*Implication elimination
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   647
  A ==> B    A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   648
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   649
        B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   650
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   651
fun implies_elim thAB thA =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   652
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   653
    val Thm {maxidx = maxA, der = derA, hyps = hypsA, shyps = shypsA, tpairs = tpairsA,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   654
      prop = propA, ...} = thA
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   655
    and Thm {der, maxidx, hyps, shyps, tpairs, prop, ...} = thAB;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   656
    fun err () = raise THM ("implies_elim: major premise", 0, [thAB, thA]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   657
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   658
    case prop of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   659
      imp $ A $ B =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   660
        if imp = Term.implies andalso A aconv propA then
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   661
          Thm {thy_ref = merge_thys2 thAB thA,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   662
            der = Pt.infer_derivs (curry Pt.%%) der derA,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   663
            maxidx = Int.max (maxA, maxidx),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   664
            shyps = Sorts.union shypsA shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   665
            hyps = union_hyps hypsA hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   666
            tpairs = union_tpairs tpairsA tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   667
            prop = B}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   668
        else err ()
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   669
    | _ => err ()
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   670
  end;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   671
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   672
(*Forall introduction.  The Free or Var x must not be free in the hypotheses.
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   673
    [x]
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   674
     :
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   675
     A
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   676
  ------
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   677
  !!x. A
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   678
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   679
fun forall_intr
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   680
    (ct as Cterm {t = x, T, sorts, ...})
16679
abd1461fa288 dest_ctyp: raise exception for non-constructor;
wenzelm
parents: 16656
diff changeset
   681
    (th as Thm {der, maxidx, shyps, hyps, tpairs, prop, ...}) =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   682
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   683
    fun result a =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   684
      Thm {thy_ref = merge_thys1 ct th,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   685
        der = Pt.infer_derivs' (Pt.forall_intr_proof x a) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   686
        maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   687
        shyps = Sorts.union sorts shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   688
        hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   689
        tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   690
        prop = all T $ Abs (a, T, abstract_over (x, prop))};
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   691
    fun check_occs x ts =
16847
8fc160b12e73 invoke_oracle: do not keep theory value, but theory_ref;
wenzelm
parents: 16725
diff changeset
   692
      if exists (fn t => Logic.occs (x, t)) ts then
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   693
        raise THM("forall_intr: variable free in assumptions", 0, [th])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   694
      else ();
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   695
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   696
    case x of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   697
      Free (a, _) => (check_occs x hyps; check_occs x (terms_of_tpairs tpairs); result a)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   698
    | Var ((a, _), _) => (check_occs x (terms_of_tpairs tpairs); result a)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   699
    | _ => raise THM ("forall_intr: not a variable", 0, [th])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   700
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   701
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   702
(*Forall elimination
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   703
  !!x. A
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   704
  ------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   705
  A[t/x]
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   706
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   707
fun forall_elim
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   708
    (ct as Cterm {t, T, maxidx = maxt, sorts, ...})
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   709
    (th as Thm {der, maxidx, shyps, hyps, tpairs, prop, ...}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   710
  (case prop of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   711
    Const ("all", Type ("fun", [Type ("fun", [qary, _]), _])) $ A =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   712
      if T <> qary then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   713
        raise THM ("forall_elim: type mismatch", 0, [th])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   714
      else
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   715
        Thm {thy_ref = merge_thys1 ct th,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   716
          der = Pt.infer_derivs' (Pt.% o rpair (SOME t)) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   717
          maxidx = Int.max (maxidx, maxt),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   718
          shyps = Sorts.union sorts shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   719
          hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   720
          tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   721
          prop = Term.betapply (A, t)}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   722
  | _ => raise THM ("forall_elim: not quantified", 0, [th]));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   723
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   724
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   725
(* Equality *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   726
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   727
(*Reflexivity
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   728
  t == t
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   729
*)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   730
fun reflexive (ct as Cterm {thy_ref, t, T, maxidx, sorts}) =
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   731
  Thm {thy_ref = thy_ref,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   732
    der = Pt.infer_derivs' I (false, Pt.reflexive),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   733
    maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   734
    shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   735
    hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   736
    tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   737
    prop = Logic.mk_equals (t, t)};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   738
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   739
(*Symmetry
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   740
  t == u
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   741
  ------
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   742
  u == t
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   743
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   744
fun symmetric (th as Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   745
  (case prop of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   746
    (eq as Const ("==", Type (_, [T, _]))) $ t $ u =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   747
      Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   748
        der = Pt.infer_derivs' Pt.symmetric der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   749
        maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   750
        shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   751
        hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   752
        tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   753
        prop = eq $ u $ t}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   754
    | _ => raise THM ("symmetric", 0, [th]));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   755
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   756
(*Transitivity
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   757
  t1 == u    u == t2
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   758
  ------------------
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   759
       t1 == t2
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   760
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   761
fun transitive th1 th2 =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   762
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   763
    val Thm {der = der1, maxidx = max1, hyps = hyps1, shyps = shyps1, tpairs = tpairs1,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   764
      prop = prop1, ...} = th1
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   765
    and Thm {der = der2, maxidx = max2, hyps = hyps2, shyps = shyps2, tpairs = tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   766
      prop = prop2, ...} = th2;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   767
    fun err msg = raise THM ("transitive: " ^ msg, 0, [th1, th2]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   768
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   769
    case (prop1, prop2) of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   770
      ((eq as Const ("==", Type (_, [T, _]))) $ t1 $ u, Const ("==", _) $ u' $ t2) =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   771
        if not (u aconv u') then err "middle term"
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   772
        else
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   773
          Thm {thy_ref = merge_thys2 th1 th2,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   774
            der = Pt.infer_derivs (Pt.transitive u T) der1 der2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   775
            maxidx = Int.max (max1, max2),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   776
            shyps = Sorts.union shyps1 shyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   777
            hyps = union_hyps hyps1 hyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   778
            tpairs = union_tpairs tpairs1 tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   779
            prop = eq $ t1 $ t2}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   780
     | _ =>  err "premises"
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   781
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   782
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   783
(*Beta-conversion
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   784
  (%x. t)(u) == t[u/x]
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   785
  fully beta-reduces the term if full = true
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   786
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   787
fun beta_conversion full (Cterm {thy_ref, t, T, maxidx, sorts}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   788
  let val t' =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   789
    if full then Envir.beta_norm t
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   790
    else
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   791
      (case t of Abs (_, _, bodt) $ u => subst_bound (u, bodt)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   792
      | _ => raise THM ("beta_conversion: not a redex", 0, []));
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   793
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   794
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   795
      der = Pt.infer_derivs' I (false, Pt.reflexive),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   796
      maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   797
      shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   798
      hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   799
      tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   800
      prop = Logic.mk_equals (t, t')}
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   801
  end;
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
   802
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   803
fun eta_conversion (Cterm {thy_ref, t, T, maxidx, sorts}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   804
  Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   805
    der = Pt.infer_derivs' I (false, Pt.reflexive),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   806
    maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   807
    shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   808
    hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   809
    tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   810
    prop = Logic.mk_equals (t, Pattern.eta_contract t)};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   811
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   812
(*The abstraction rule.  The Free or Var x must not be free in the hypotheses.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   813
  The bound variable will be named "a" (since x will be something like x320)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   814
      t == u
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   815
  --------------
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   816
  %x. t == %x. u
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   817
*)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   818
fun abstract_rule a
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   819
    (Cterm {t = x, T, sorts, ...})
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   820
    (th as Thm {thy_ref, der, maxidx, hyps, shyps, tpairs, prop}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   821
  let
17708
6c6ecafd8c0e abstract_rule: tuned exception msgs;
wenzelm
parents: 17412
diff changeset
   822
    val string_of = Sign.string_of_term (Theory.deref thy_ref);
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   823
    val (t, u) = Logic.dest_equals prop
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   824
      handle TERM _ => raise THM ("abstract_rule: premise not an equality", 0, [th]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   825
    val result =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   826
      Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   827
        der = Pt.infer_derivs' (Pt.abstract_rule x a) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   828
        maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   829
        shyps = Sorts.union sorts shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   830
        hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   831
        tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   832
        prop = Logic.mk_equals
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   833
          (Abs (a, T, abstract_over (x, t)), Abs (a, T, abstract_over (x, u)))};
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   834
    fun check_occs x ts =
16847
8fc160b12e73 invoke_oracle: do not keep theory value, but theory_ref;
wenzelm
parents: 16725
diff changeset
   835
      if exists (fn t => Logic.occs (x, t)) ts then
17708
6c6ecafd8c0e abstract_rule: tuned exception msgs;
wenzelm
parents: 17412
diff changeset
   836
        raise THM ("abstract_rule: variable free in assumptions " ^ string_of x, 0, [th])
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   837
      else ();
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   838
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   839
    case x of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   840
      Free _ => (check_occs x hyps; check_occs x (terms_of_tpairs tpairs); result)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   841
    | Var _ => (check_occs x (terms_of_tpairs tpairs); result)
17708
6c6ecafd8c0e abstract_rule: tuned exception msgs;
wenzelm
parents: 17412
diff changeset
   842
    | _ => raise THM ("abstract_rule: not a variable " ^ string_of x, 0, [th])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   843
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   844
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   845
(*The combination rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   846
  f == g  t == u
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   847
  --------------
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   848
    f t == g u
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   849
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   850
fun combination th1 th2 =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   851
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   852
    val Thm {der = der1, maxidx = max1, shyps = shyps1, hyps = hyps1, tpairs = tpairs1,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   853
      prop = prop1, ...} = th1
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   854
    and Thm {der = der2, maxidx = max2, shyps = shyps2, hyps = hyps2, tpairs = tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   855
      prop = prop2, ...} = th2;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   856
    fun chktypes fT tT =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   857
      (case fT of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   858
        Type ("fun", [T1, T2]) =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   859
          if T1 <> tT then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   860
            raise THM ("combination: types", 0, [th1, th2])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   861
          else ()
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   862
      | _ => raise THM ("combination: not function type", 0, [th1, th2]));
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   863
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   864
    case (prop1, prop2) of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   865
      (Const ("==", Type ("fun", [fT, _])) $ f $ g,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   866
       Const ("==", Type ("fun", [tT, _])) $ t $ u) =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   867
        (chktypes fT tT;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   868
          Thm {thy_ref = merge_thys2 th1 th2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   869
            der = Pt.infer_derivs (Pt.combination f g t u fT) der1 der2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   870
            maxidx = Int.max (max1, max2),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   871
            shyps = Sorts.union shyps1 shyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   872
            hyps = union_hyps hyps1 hyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   873
            tpairs = union_tpairs tpairs1 tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   874
            prop = Logic.mk_equals (f $ t, g $ u)})
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   875
     | _ => raise THM ("combination: premises", 0, [th1, th2])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   876
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   877
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   878
(*Equality introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   879
  A ==> B  B ==> A
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   880
  ----------------
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   881
       A == B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   882
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   883
fun equal_intr th1 th2 =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   884
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   885
    val Thm {der = der1, maxidx = max1, shyps = shyps1, hyps = hyps1, tpairs = tpairs1,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   886
      prop = prop1, ...} = th1
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   887
    and Thm {der = der2, maxidx = max2, shyps = shyps2, hyps = hyps2, tpairs = tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   888
      prop = prop2, ...} = th2;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   889
    fun err msg = raise THM ("equal_intr: " ^ msg, 0, [th1, th2]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   890
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   891
    case (prop1, prop2) of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   892
      (Const("==>", _) $ A $ B, Const("==>", _) $ B' $ A') =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   893
        if A aconv A' andalso B aconv B' then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   894
          Thm {thy_ref = merge_thys2 th1 th2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   895
            der = Pt.infer_derivs (Pt.equal_intr A B) der1 der2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   896
            maxidx = Int.max (max1, max2),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   897
            shyps = Sorts.union shyps1 shyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   898
            hyps = union_hyps hyps1 hyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   899
            tpairs = union_tpairs tpairs1 tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   900
            prop = Logic.mk_equals (A, B)}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   901
        else err "not equal"
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   902
    | _ =>  err "premises"
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   903
  end;
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   904
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   905
(*The equal propositions rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   906
  A == B  A
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   907
  ---------
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   908
      B
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   909
*)
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   910
fun equal_elim th1 th2 =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   911
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   912
    val Thm {der = der1, maxidx = max1, shyps = shyps1, hyps = hyps1,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   913
      tpairs = tpairs1, prop = prop1, ...} = th1
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   914
    and Thm {der = der2, maxidx = max2, shyps = shyps2, hyps = hyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   915
      tpairs = tpairs2, prop = prop2, ...} = th2;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   916
    fun err msg = raise THM ("equal_elim: " ^ msg, 0, [th1, th2]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   917
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   918
    case prop1 of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   919
      Const ("==", _) $ A $ B =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   920
        if prop2 aconv A then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   921
          Thm {thy_ref = merge_thys2 th1 th2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   922
            der = Pt.infer_derivs (Pt.equal_elim A B) der1 der2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   923
            maxidx = Int.max (max1, max2),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   924
            shyps = Sorts.union shyps1 shyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   925
            hyps = union_hyps hyps1 hyps2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   926
            tpairs = union_tpairs tpairs1 tpairs2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   927
            prop = B}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   928
        else err "not equal"
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   929
     | _ =>  err"major premise"
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   930
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   931
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   932
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   933
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   934
(**** Derived rules ****)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   935
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   936
(*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
   937
  Instantiates the theorem and deletes trivial tpairs.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   938
  Resulting sequence may contain multiple elements if the tpairs are
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   939
    not all flex-flex. *)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   940
fun flexflex_rule (th as Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   941
  Unify.smash_unifiers (Theory.deref thy_ref, Envir.empty maxidx, tpairs)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   942
  |> Seq.map (fn env =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   943
      if Envir.is_empty env then th
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   944
      else
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   945
        let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   946
          val tpairs' = tpairs |> map (pairself (Envir.norm_term env))
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   947
            (*remove trivial tpairs, of the form t==t*)
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   948
            |> filter_out (op aconv);
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   949
          val prop' = Envir.norm_term env prop;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   950
        in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   951
          Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   952
            der = Pt.infer_derivs' (Pt.norm_proof' env) der,
16711
2c1f9640b744 tuned maxidx;
wenzelm
parents: 16679
diff changeset
   953
            maxidx = maxidx_tpairs tpairs' (maxidx_of_term prop'),
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   954
            shyps = may_insert_env_sorts (Theory.deref thy_ref) env shyps,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   955
            hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   956
            tpairs = tpairs',
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   957
            prop = prop'}
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   958
        end);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
   959
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   960
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   961
(*Instantiation of Vars
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   962
           A
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   963
  --------------------
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   964
  A[t1/v1, ..., tn/vn]
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   965
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   966
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   967
local
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   968
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   969
fun pretty_typing thy t T =
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
   970
  Pretty.block [Sign.pretty_term thy t, Pretty.str " ::", Pretty.brk 1, Sign.pretty_typ thy T];
15797
a63605582573 - Eliminated nodup_vars check.
berghofe
parents: 15672
diff changeset
   971
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   972
fun add_inst (ct, cu) (thy_ref, sorts) =
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
   973
  let
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   974
    val Cterm {t = t, T = T, ...} = ct
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   975
    and Cterm {t = u, T = U, sorts = sorts_u, ...} = cu;
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   976
    val thy_ref' = Theory.merge_refs (thy_ref, merge_thys0 ct cu);
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   977
    val sorts' = Sorts.union sorts_u sorts;
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   978
  in
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   979
    (case t of Var v =>
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   980
      if T = U then ((v, u), (thy_ref', sorts'))
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   981
      else raise TYPE (Pretty.string_of (Pretty.block
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   982
       [Pretty.str "instantiate: type conflict",
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   983
        Pretty.fbrk, pretty_typing (Theory.deref thy_ref') t T,
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   984
        Pretty.fbrk, pretty_typing (Theory.deref thy_ref') u U]), [T, U], [t, u])
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   985
    | _ => raise TYPE (Pretty.string_of (Pretty.block
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   986
       [Pretty.str "instantiate: not a variable",
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   987
        Pretty.fbrk, Sign.pretty_term (Theory.deref thy_ref') t]), [], [t]))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   988
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   989
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   990
fun add_instT (cT, cU) (thy_ref, sorts) =
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   991
  let
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   992
    val Ctyp {T, thy_ref = thy_ref1, ...} = cT
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   993
    and Ctyp {T = U, thy_ref = thy_ref2, sorts = sorts_U, ...} = cU;
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   994
    val thy_ref' = Theory.merge_refs (thy_ref, Theory.merge_refs (thy_ref1, thy_ref2));
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   995
    val thy' = Theory.deref thy_ref';
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   996
    val sorts' = Sorts.union sorts_U sorts;
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
   997
  in
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
   998
    (case T of TVar (v as (_, S)) =>
17203
29b2563f5c11 refer to theory instead of low-level tsig;
wenzelm
parents: 17184
diff changeset
   999
      if Sign.of_sort thy' (U, S) then ((v, U), (thy_ref', sorts'))
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1000
      else raise TYPE ("Type not of sort " ^ Sign.string_of_sort thy' S, [U], [])
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1001
    | _ => raise TYPE (Pretty.string_of (Pretty.block
15797
a63605582573 - Eliminated nodup_vars check.
berghofe
parents: 15672
diff changeset
  1002
        [Pretty.str "instantiate: not a type variable",
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1003
         Pretty.fbrk, Sign.pretty_typ thy' T]), [T], []))
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1004
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1005
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
  1006
in
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
  1007
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1008
(*Left-to-right replacements: ctpairs = [..., (vi, ti), ...].
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1009
  Instantiates distinct Vars by terms of same type.
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1010
  Does NOT normalize the resulting theorem!*)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1011
fun instantiate ([], []) th = th
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1012
  | instantiate (instT, inst) th =
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1013
      let
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1014
        val Thm {thy_ref, der, hyps, shyps, tpairs, prop, ...} = th;
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1015
        val (inst', (instT', (thy_ref', shyps'))) =
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1016
          (thy_ref, shyps) |> fold_map add_inst inst ||> fold_map add_instT instT;
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1017
        val subst = Term.instantiate (instT', inst');
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1018
        val prop' = subst prop;
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1019
        val tpairs' = map (pairself subst) tpairs;
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1020
      in
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1021
        if has_duplicates (fn ((v, _), (v', _)) => Term.eq_var (v, v')) inst' then
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1022
          raise THM ("instantiate: variables not distinct", 0, [th])
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1023
        else if has_duplicates (fn ((v, _), (v', _)) => Term.eq_tvar (v, v')) instT' then
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1024
          raise THM ("instantiate: type variables not distinct", 0, [th])
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1025
        else
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1026
          Thm {thy_ref = thy_ref',
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1027
            der = Pt.infer_derivs' (Pt.instantiate (instT', inst')) der,
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1028
            maxidx = maxidx_tpairs tpairs' (maxidx_of_term prop'),
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1029
            shyps = shyps',
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1030
            hyps = hyps,
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1031
            tpairs = tpairs',
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1032
            prop = prop'}
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1033
      end
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1034
      handle TYPE (msg, _, _) => raise THM (msg, 0, [th]);
6928
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
  1035
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
  1036
end;
9b4cd97b459d improved error msgs of instantiate;
wenzelm
parents: 6899
diff changeset
  1037
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1038
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1039
(*The trivial implication A ==> A, justified by assume and forall rules.
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1040
  A can contain Vars, not so for assume!*)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1041
fun trivial (Cterm {thy_ref, t =A, T, maxidx, sorts}) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1042
  if T <> propT then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1043
    raise THM ("trivial: the term must have type prop", 0, [])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1044
  else
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1045
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1046
      der = Pt.infer_derivs' I (false, Pt.AbsP ("H", NONE, Pt.PBound 0)),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1047
      maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1048
      shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1049
      hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1050
      tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1051
      prop = implies $ A $ A};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1052
1503
7dba648ee25c Elimination of fully-functorial style.
paulson
parents: 1495
diff changeset
  1053
(*Axiom-scheme reflecting signature contents: "OFCLASS(?'a::c, c_class)" *)
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
  1054
fun class_triv thy c =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1055
  let val Cterm {thy_ref, t, maxidx, sorts, ...} =
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
  1056
    cterm_of thy (Logic.mk_inclass (TVar (("'a", 0), [c]), c))
6368
ba5e97a20b12 added def_name;
wenzelm
parents: 6089
diff changeset
  1057
      handle TERM (msg, _) => raise THM ("class_triv: " ^ msg, 0, []);
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1058
  in
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1059
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1060
      der = Pt.infer_derivs' I (false, Pt.PAxm ("ProtoPure.class_triv:" ^ c, t, SOME [])),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1061
      maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1062
      shyps = sorts,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1063
      hyps = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1064
      tpairs = [],
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1065
      prop = t}
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1066
  end;
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1067
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1068
6786
0af1797d5315 varifyT': observe additional 'fixed' tfrees;
wenzelm
parents: 6539
diff changeset
  1069
(* Replace all TFrees not fixed or in the hyps by new TVars *)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1070
fun varifyT' fixed (Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
12500
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
  1071
  let
15797
a63605582573 - Eliminated nodup_vars check.
berghofe
parents: 15672
diff changeset
  1072
    val tfrees = foldr add_term_tfrees fixed hyps;
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1073
    val prop1 = attach_tpairs tpairs prop;
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1074
    val (prop2, al) = Type.varify (prop1, tfrees);
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1075
    val (ts, prop3) = Logic.strip_prems (length tpairs, [], prop2);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1076
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1077
    (Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1078
      der = Pt.infer_derivs' (Pt.varify_proof prop tfrees) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1079
      maxidx = Int.max (0, maxidx),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1080
      shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1081
      hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1082
      tpairs = rev (map Logic.dest_equals ts),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1083
      prop = prop3}, al)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1084
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1085
12500
0a6667d65e9b varifyT' returns newly introduces variables;
wenzelm
parents: 11692
diff changeset
  1086
val varifyT = #1 o varifyT' [];
6786
0af1797d5315 varifyT': observe additional 'fixed' tfrees;
wenzelm
parents: 6539
diff changeset
  1087
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1088
(* Replace all TVars by new TFrees *)
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1089
fun freezeT (Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1090
  let
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1091
    val prop1 = attach_tpairs tpairs prop;
16287
7a03b4b4df67 Type.freeze;
wenzelm
parents: 16135
diff changeset
  1092
    val prop2 = Type.freeze prop1;
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1093
    val (ts, prop3) = Logic.strip_prems (length tpairs, [], prop2);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1094
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1095
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1096
      der = Pt.infer_derivs' (Pt.freezeT prop1) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1097
      maxidx = maxidx_of_term prop2,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1098
      shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1099
      hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1100
      tpairs = rev (map Logic.dest_equals ts),
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1101
      prop = prop3}
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1102
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1103
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1104
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1105
(*** Inference rules for tactics ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1106
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1107
(*Destruct proof state into constraints, other goals, goal(i), rest *)
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1108
fun dest_state (state as Thm{prop,tpairs,...}, i) =
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1109
  (case  Logic.strip_prems(i, [], prop) of
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1110
      (B::rBs, C) => (tpairs, rev rBs, B, C)
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1111
    | _ => raise THM("dest_state", i, [state]))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1112
  handle TERM _ => raise THM("dest_state", i, [state]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1113
309
3751567696bf restored the signature constraint :THM
lcp
parents: 305
diff changeset
  1114
(*Increment variables and parameters of orule as required for
18035
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1115
  resolution with a goal.*)
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1116
fun lift_rule goal orule =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1117
  let
18035
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1118
    val Cterm {t = gprop, T, maxidx = gmax, sorts, ...} = goal;
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1119
    val inc = gmax + 1;
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1120
    val lift_abs = Logic.lift_abs inc gprop;
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1121
    val lift_all = Logic.lift_all inc gprop;
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1122
    val Thm {der, maxidx, shyps, hyps, tpairs, prop, ...} = orule;
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1123
    val (As, B) = Logic.strip_horn prop;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1124
  in
18035
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1125
    if T <> propT then raise THM ("lift_rule: the term must have type prop", 0, [])
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1126
    else
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1127
      Thm {thy_ref = merge_thys1 goal orule,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1128
        der = Pt.infer_derivs' (Pt.lift_proof gprop inc prop) der,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1129
        maxidx = maxidx + inc,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1130
        shyps = Sorts.union shyps sorts,  (*sic!*)
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1131
        hyps = hyps,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1132
        tpairs = map (pairself lift_abs) tpairs,
eaae44affc9e added cgoal_of;
wenzelm
parents: 17868
diff changeset
  1133
        prop = Logic.list_implies (map lift_all As, lift_all B)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1134
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1135
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
  1136
fun incr_indexes i (thm as Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1137
  if i < 0 then raise THM ("negative increment", 0, [thm])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1138
  else if i = 0 then thm
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1139
  else
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
  1140
    Thm {thy_ref = thy_ref,
16884
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1141
      der = Pt.infer_derivs'
1678a796b6b2 tuned instantiate (avoid subst_atomic, subst_atomic_types);
wenzelm
parents: 16847
diff changeset
  1142
        (Pt.map_proof_terms (Logic.incr_indexes ([], i)) (Logic.incr_tvar i)) der,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1143
      maxidx = maxidx + i,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1144
      shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1145
      hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1146
      tpairs = map (pairself (Logic.incr_indexes ([], i))) tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1147
      prop = Logic.incr_indexes ([], i) prop};
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1148
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1149
(*Solve subgoal Bi of proof state B1...Bn/C by assumption. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1150
fun assumption i state =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1151
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1152
    val Thm {thy_ref, der, maxidx, shyps, hyps, prop, ...} = state;
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1153
    val thy = Theory.deref thy_ref;
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1154
    val (tpairs, Bs, Bi, C) = dest_state (state, i);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1155
    fun newth n (env as Envir.Envir {maxidx, ...}, tpairs) =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1156
      Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1157
        der = Pt.infer_derivs'
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1158
          ((if Envir.is_empty env then I else (Pt.norm_proof' env)) o
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1159
            Pt.assumption_proof Bs Bi n) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1160
        maxidx = maxidx,
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1161
        shyps = may_insert_env_sorts thy env shyps,
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1162
        hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1163
        tpairs =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1164
          if Envir.is_empty env then tpairs
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1165
          else map (pairself (Envir.norm_term env)) tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1166
        prop =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1167
          if Envir.is_empty env then (*avoid wasted normalizations*)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1168
            Logic.list_implies (Bs, C)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1169
          else (*normalize the new rule fully*)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1170
            Envir.norm_term env (Logic.list_implies (Bs, C))};
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1171
    fun addprfs [] _ = Seq.empty
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1172
      | addprfs ((t, u) :: apairs) n = Seq.make (fn () => Seq.pull
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1173
          (Seq.mapp (newth n)
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1174
            (Unify.unifiers (thy, Envir.empty maxidx, (t, u) :: tpairs))
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1175
            (addprfs apairs (n + 1))))
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1176
  in addprfs (Logic.assum_pairs (~1, Bi)) 1 end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1177
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1178
(*Solve subgoal Bi of proof state B1...Bn/C by assumption.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1179
  Checks if Bi's conclusion is alpha-convertible to one of its assumptions*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1180
fun eq_assumption i state =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1181
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1182
    val Thm {thy_ref, der, maxidx, shyps, hyps, prop, ...} = state;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1183
    val (tpairs, Bs, Bi, C) = dest_state (state, i);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1184
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1185
    (case find_index (op aconv) (Logic.assum_pairs (~1, Bi)) of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1186
      ~1 => raise THM ("eq_assumption", 0, [state])
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1187
    | n =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1188
        Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1189
          der = Pt.infer_derivs' (Pt.assumption_proof Bs Bi (n + 1)) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1190
          maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1191
          shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1192
          hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1193
          tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1194
          prop = Logic.list_implies (Bs, C)})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1195
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1196
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1197
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1198
(*For rotate_tac: fast rotation of assumptions of subgoal i*)
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1199
fun rotate_rule k i state =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1200
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1201
    val Thm {thy_ref, der, maxidx, shyps, hyps, prop, ...} = state;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1202
    val (tpairs, Bs, Bi, C) = dest_state (state, i);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1203
    val params = Term.strip_all_vars Bi
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1204
    and rest   = Term.strip_all_body Bi;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1205
    val asms   = Logic.strip_imp_prems rest
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1206
    and concl  = Logic.strip_imp_concl rest;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1207
    val n = length asms;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1208
    val m = if k < 0 then n + k else k;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1209
    val Bi' =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1210
      if 0 = m orelse m = n then Bi
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1211
      else if 0 < m andalso m < n then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1212
        let val (ps, qs) = splitAt (m, asms)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1213
        in list_all (params, Logic.list_implies (qs @ ps, concl)) end
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1214
      else raise THM ("rotate_rule", k, [state]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1215
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1216
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1217
      der = Pt.infer_derivs' (Pt.rotate_proof Bs Bi m) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1218
      maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1219
      shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1220
      hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1221
      tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1222
      prop = Logic.list_implies (Bs @ [Bi'], C)}
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1223
  end;
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1224
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1225
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1226
(*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
  1227
  unchanged.  Does nothing if k=0 or if k equals n-j, where n is the
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1228
  number of premises.  Useful with etac and underlies defer_tac*)
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1229
fun permute_prems j k rl =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1230
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1231
    val Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop} = rl;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1232
    val prems = Logic.strip_imp_prems prop
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1233
    and concl = Logic.strip_imp_concl prop;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1234
    val moved_prems = List.drop (prems, j)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1235
    and fixed_prems = List.take (prems, j)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1236
      handle Subscript => raise THM ("permute_prems: j", j, [rl]);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1237
    val n_j = length moved_prems;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1238
    val m = if k < 0 then n_j + k else k;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1239
    val prop' =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1240
      if 0 = m orelse m = n_j then prop
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1241
      else if 0 < m andalso m < n_j then
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1242
        let val (ps, qs) = splitAt (m, moved_prems)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1243
        in Logic.list_implies (fixed_prems @ qs @ ps, concl) end
16725
597830f91930 added full_prop_of: includes tpairs;
wenzelm
parents: 16711
diff changeset
  1244
      else raise THM ("permute_prems: k", k, [rl]);
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1245
  in
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1246
    Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1247
      der = Pt.infer_derivs' (Pt.permute_prems_prf prems j m) der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1248
      maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1249
      shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1250
      hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1251
      tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1252
      prop = prop'}
7248
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1253
  end;
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1254
322151fe6f02 new primitive rule permute_prems to underlie defer_tac and rotate_prems
paulson
parents: 7070
diff changeset
  1255
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1256
(** User renaming of parameters in a subgoal **)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1257
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1258
(*Calls error rather than raising an exception because it is intended
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1259
  for top-level use -- exception handling would not make sense here.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1260
  The names in cs, if distinct, are used for the innermost parameters;
17868
5a12b1b5990f tuned comment;
wenzelm
parents: 17708
diff changeset
  1261
  preceding parameters may be renamed to make all params distinct.*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1262
fun rename_params_rule (cs, i) state =
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1263
  let
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1264
    val Thm {thy_ref, der, maxidx, shyps, hyps, ...} = state;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1265
    val (tpairs, Bs, Bi, C) = dest_state (state, i);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1266
    val iparams = map #1 (Logic.strip_params Bi);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1267
    val short = length iparams - length cs;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1268
    val newnames =
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1269
      if short < 0 then error "More names than abstractions!"
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1270
      else variantlist (Library.take (short, iparams), cs) @ cs;
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1271
    val freenames = map (#1 o dest_Free) (term_frees Bi);
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1272
    val newBi = Logic.list_rename_params (newnames, Bi);
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1273
  in
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1274
    case findrep cs of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1275
      c :: _ => (warning ("Can't rename.  Bound variables not distinct: " ^ c); state)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1276
    | [] =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1277
      (case cs inter_string freenames of
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1278
        a :: _ => (warning ("Can't rename.  Bound/Free variable clash: " ^ a); state)
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1279
      | [] =>
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1280
        Thm {thy_ref = thy_ref,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1281
          der = der,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1282
          maxidx = maxidx,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1283
          shyps = shyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1284
          hyps = hyps,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1285
          tpairs = tpairs,
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1286
          prop = Logic.list_implies (Bs @ [newBi], C)})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1287
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1288
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1289
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1290
(*** Preservation of bound variable names ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1291
16601
ee8eefade568 more efficient treatment of shyps and hyps (use ordered lists);
wenzelm
parents: 16425
diff changeset
  1292
fun rename_boundvars pat obj (thm as Thm {thy_ref, der, maxidx, shyps, hyps, tpairs, prop}) =
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1293
  (case Term.rename_abs pat obj prop of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
  1294
    NONE => thm
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
  1295
  | SOME prop' => Thm
16425
2427be27cc60 accomodate identification of type Sign.sg and theory;
wenzelm
parents: 16352
diff changeset
  1296
      {thy_ref = thy_ref,
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1297
       der = der,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1298
       maxidx = maxidx,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1299
       hyps = hyps,
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1300
       shyps = shyps,
13658
c9ad3e64ddcf Changed handling of flex-flex constraints: now stored in separate
berghofe
parents: 13642
diff changeset
  1301
       tpairs = tpairs,
12982
34a07757634d moved match_bvs, match_bvars, renAbs to term.ML;
wenzelm
parents: 12923
diff changeset
  1302
       prop = prop'});
10416
5b33e732e459 - Moved rewriting functions to meta_simplifier.ML
berghofe
parents: 10348
diff changeset
  1303
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1304
16656
18b0cb22057d ctyp: added 'sorts' field;
wenzelm
parents: 16601
diff changeset
  1305
(* strip_apply f (A, B) strips off all assumptions/parameters from A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1306
   introduced by lifting over B, and applies f to remaining part of A*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1307
fun strip_apply f =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1308
  let fun strip(Const("==>",_)$ A1 $ B1,
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1309
                Const("==>",_)$ _  $ B2) = implies $ A1 $ strip(B1,B2)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1310
        | strip((c as Const("all",_)) $ Abs(a,T,t1),
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1311
                      Const("all",_)  $ Abs(_,_,t2)) = c$Abs(a,T,strip(t1,t2))
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1312
        | strip(A,_) = f A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1313
  in strip end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1314
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1315
(*Use the alist to rename all bound variables and some unknowns in a term
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1316
  dpairs = current disagreement pairs;  tpairs = permanent ones (flexflex);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1317
  Preserves unknowns in tpairs and on lhs of dpairs. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1318
fun rename_bvs([],_,_,_) = I
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1319
  | rename_bvs(al,dpairs,tpairs,B) =
15574
b1d1b5bfc464 Removed practically all references to Library.foldr.
skalberg
parents: 15570
diff changeset
  1320
    let val vars = foldr add_term_vars []
b1d1b5bfc464 Removed practically all references to Library.foldr.
skalberg
parents: 15570
diff changeset
  1321
                        (map fst dpairs @ map fst tpairs @ map snd tpairs)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1322
        (*unknowns appearing elsewhere be preserved!*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1323
        val vids = map (#1 o #1 o dest_Var) vars;
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1324
        fun rename(t as Var((x,i),T)) =
17184
3d80209e9a53 use AList operations;
wenzelm
parents: 16991
diff changeset
  1325
                (case AList.lookup (op =) al x of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
  1326
                   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
  1327
                              else Var((y,i),T)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 15454
diff changeset
  1328
                 | NONE=> t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1329
          | rename(Abs(x,T,t)) =
17184
3d80209e9a53 use AList operations;
wenzelm
parents: 16991
diff changeset
  1330
              Abs (if_none (AList.lookup (op =) al x) x, T, rename t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1331
          | rename(f$t) = rename f $ rename t
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1332
          | rename(t) = t;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1333
        fun strip_ren Ai = strip_apply rename (Ai,B)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1334
    in strip_ren end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1335
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1336
(*Function to rename bounds/unknowns in the argument, lifted over B*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1337
fun rename_bvars(dpairs, tpairs, B) =
15574
b1d1b5bfc464 Removed practically all references to Library.foldr.
skalberg
parents: 15570
diff changeset
  1338
        rename_bvs(foldr Term.match_bvars [] dpairs, dpairs, tpairs, B);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1339
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1340