src/Pure/thm.ML
author nipkow
Mon, 24 Nov 1997 16:43:43 +0100
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child 4288 3f5e8c4aa84d
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Added read_def_cterms for simultaneous reading/typing of terms under defaults. Redefined read_def_cterm in in terms of read_def_cterms. Deleted obsolete read_cterms. Cleaned up def of read_insts, which is not much shorter but much clearere are correcter now.
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(*  Title:      Pure/thm.ML
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    ID:         $Id$
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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    Copyright   1994  University of Cambridge
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The core of Isabelle's Meta Logic: certified types and terms, meta
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theorems, meta rules (including resolution and simplification).
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*)
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signature THM =
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  sig
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  (*certified types*)
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  type ctyp
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  val rep_ctyp          : ctyp -> {sign: Sign.sg, T: typ}
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  val typ_of            : ctyp -> typ
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  val ctyp_of           : Sign.sg -> typ -> ctyp
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  val read_ctyp         : Sign.sg -> string -> ctyp
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  (*certified terms*)
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  type cterm
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  exception CTERM of string
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  val rep_cterm         : cterm -> {sign: Sign.sg, t: term, T: typ, maxidx: int}
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  val term_of           : cterm -> term
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  val cterm_of          : Sign.sg -> term -> cterm
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  val ctyp_of_term      : cterm -> ctyp
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  val read_cterm        : Sign.sg -> string * typ -> cterm
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  val cterm_fun         : (term -> term) -> (cterm -> cterm)
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  val dest_comb         : cterm -> cterm * cterm
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  val dest_abs          : cterm -> cterm * cterm
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  val adjust_maxidx     : 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 read_def_cterm    :
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    Sign.sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> bool -> string * typ -> cterm * (indexname * typ) list
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  val read_def_cterms   :
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    Sign.sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> bool -> (string * typ)list
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    -> cterm list * (indexname * typ)list
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  (*proof terms [must DUPLICATE declaration as a specification]*)
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  datatype deriv_kind = MinDeriv | ThmDeriv | FullDeriv;
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  val keep_derivs       : deriv_kind ref
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  datatype rule = 
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      MinProof                          
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    | Oracle		  of string * Sign.sg * object
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    | Axiom               of string
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    | Theorem             of string       
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    | Assume              of cterm
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    | Implies_intr        of cterm
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    | Implies_intr_shyps
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    | Implies_intr_hyps
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    | Implies_elim 
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    | Forall_intr         of cterm
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    | Forall_elim         of cterm
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    | Reflexive           of cterm
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    | Symmetric 
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    | Transitive
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    | Beta_conversion     of cterm
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    | Extensional
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    | Abstract_rule       of string * cterm
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    | Combination
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    | Equal_intr
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    | Equal_elim
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    | Trivial             of cterm
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    | Lift_rule           of cterm * int 
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    | Assumption          of int * Envir.env option
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    | Rotate_rule         of int * int
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    | Instantiate         of (indexname * ctyp) list * (cterm * cterm) list
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    | Bicompose           of bool * bool * int * int * Envir.env
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    | Flexflex_rule       of Envir.env            
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    | Class_triv          of class       
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    | VarifyT
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    | FreezeT
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    | RewriteC            of cterm
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    | CongC               of cterm
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    | Rewrite_cterm       of cterm
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    | Rename_params_rule  of string list * int;
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  type deriv   (* = rule mtree *)
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  (*meta theorems*)
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  type thm
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  exception THM of string * int * thm list
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  val rep_thm           : thm -> {sign: Sign.sg, der: deriv, maxidx: int,
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                                  shyps: sort list, hyps: term list, 
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                                  prop: term}
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  val crep_thm          : thm -> {sign: Sign.sg, der: deriv, maxidx: int,
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                                  shyps: sort list, hyps: cterm list, 
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                                  prop: cterm}
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  val eq_thm		: thm * thm -> bool
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  val sign_of_thm       : thm -> Sign.sg
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  val transfer_sg	: Sign.sg -> thm -> thm
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  val transfer		: theory -> thm -> thm
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  val tpairs_of         : thm -> (term * term) list
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  val prems_of          : thm -> term list
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  val nprems_of         : thm -> int
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  val concl_of          : thm -> term
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  val cprop_of          : thm -> cterm
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  val extra_shyps       : thm -> sort list
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  val force_strip_shyps : bool ref      (* FIXME tmp (since 1995/08/01) *)
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  val strip_shyps       : thm -> thm
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  val implies_intr_shyps: thm -> thm
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  val get_axiom         : theory -> xstring -> thm
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  val name_thm          : string * thm -> thm
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  val name_of_thm	: thm -> string
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  val axioms_of         : theory -> (string * thm) list
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  (*meta rules*)
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  val assume            : cterm -> thm
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  val compress          : thm -> thm
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  val implies_intr      : cterm -> thm -> thm
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  val implies_elim      : thm -> thm -> thm
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  val forall_intr       : cterm -> thm -> thm
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  val forall_elim       : cterm -> thm -> thm
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  val reflexive         : cterm -> thm
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  val symmetric         : thm -> thm
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  val transitive        : thm -> thm -> thm
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  val beta_conversion   : cterm -> thm
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  val extensional       : thm -> thm
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  val abstract_rule     : string -> cterm -> thm -> thm
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  val combination       : thm -> thm -> thm
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  val equal_intr        : thm -> thm -> thm
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  val equal_elim        : thm -> thm -> thm
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  val implies_intr_hyps : thm -> thm
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  val flexflex_rule     : thm -> thm Seq.seq
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  val instantiate       :
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    (indexname * ctyp) list * (cterm * cterm) list -> thm -> thm
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  val trivial           : cterm -> thm
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  val class_triv        : theory -> class -> thm
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  val varifyT           : thm -> thm
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  val freezeT           : thm -> thm
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  val dest_state        : thm * int ->
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    (term * term) list * term list * term * term
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  val lift_rule         : (thm * int) -> thm -> thm
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  val 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 rename_params_rule: string list * int -> thm -> thm
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  val bicompose         : bool -> bool * thm * int ->
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    int -> thm -> thm Seq.seq
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  val biresolution      : bool -> (bool * thm) list ->
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    int -> thm -> thm Seq.seq
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  (*meta simplification*)
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  exception SIMPLIFIER of string * thm
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  type meta_simpset
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  val dest_mss		: meta_simpset ->
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    {simps: thm list, congs: thm list, procs: (string * cterm list) list}
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  val empty_mss         : meta_simpset
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  val merge_mss		: meta_simpset * meta_simpset -> meta_simpset
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  val add_simps         : meta_simpset * thm list -> meta_simpset
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  val del_simps         : meta_simpset * thm list -> meta_simpset
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  val mss_of            : thm list -> meta_simpset
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  val add_congs         : meta_simpset * thm list -> meta_simpset
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  val del_congs         : meta_simpset * thm list -> meta_simpset
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  val add_simprocs	: meta_simpset *
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    (string * cterm list * (Sign.sg -> thm list -> term -> thm option) * stamp) list
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      -> meta_simpset
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  val del_simprocs	: meta_simpset *
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    (string * cterm list * (Sign.sg -> thm list -> term -> thm option) * stamp) list
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      -> meta_simpset
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  val add_prems         : meta_simpset * thm list -> meta_simpset
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  val prems_of_mss      : meta_simpset -> thm list
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  val set_mk_rews       : meta_simpset * (thm -> thm list) -> meta_simpset
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  val mk_rews_of_mss    : meta_simpset -> thm -> thm list
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  val set_termless      : meta_simpset * (term * term -> bool) -> meta_simpset
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  val trace_simp        : bool ref
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  val rewrite_cterm     : bool * bool -> meta_simpset ->
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                          (meta_simpset -> thm -> thm option) -> cterm -> thm
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  val invoke_oracle     : theory -> xstring -> Sign.sg * object -> thm
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end;
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structure Thm: THM =
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struct
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(*** Certified terms and types ***)
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(** certified types **)
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(*certified typs under a signature*)
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datatype ctyp = Ctyp of {sign_ref: Sign.sg_ref, T: typ};
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fun rep_ctyp (Ctyp {sign_ref, T}) = {sign = Sign.deref sign_ref, T = T};
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fun typ_of (Ctyp {T, ...}) = T;
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fun ctyp_of sign T =
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  Ctyp {sign_ref = Sign.self_ref sign, T = Sign.certify_typ sign T};
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fun read_ctyp sign s =
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  Ctyp {sign_ref = Sign.self_ref sign, T = Sign.read_typ (sign, K None) s};
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(** certified terms **)
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(*certified terms under a signature, with checked typ and maxidx of Vars*)
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datatype cterm = Cterm of {sign_ref: Sign.sg_ref, t: term, T: typ, maxidx: int};
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fun rep_cterm (Cterm {sign_ref, t, T, maxidx}) =
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  {sign = Sign.deref sign_ref, t = t, T = T, maxidx = maxidx};
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fun term_of (Cterm {t, ...}) = t;
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fun ctyp_of_term (Cterm {sign_ref, T, ...}) = Ctyp {sign_ref = sign_ref, T = T};
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(*create a cterm by checking a "raw" term with respect to a signature*)
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fun cterm_of sign tm =
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  let val (t, T, maxidx) = Sign.certify_term sign tm
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  in  Cterm {sign_ref = Sign.self_ref sign, t = t, T = T, maxidx = maxidx}
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  end;
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fun cterm_fun f (Cterm {sign_ref, t, ...}) = cterm_of (Sign.deref sign_ref) (f t);
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exception CTERM of string;
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(*Destruct application in cterms*)
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fun dest_comb (Cterm {sign_ref, T, maxidx, t = A $ B}) =
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      let val typeA = fastype_of A;
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          val typeB =
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            case typeA of Type("fun",[S,T]) => S
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                        | _ => error "Function type expected in dest_comb";
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      in
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      (Cterm {sign_ref=sign_ref, maxidx=maxidx, t=A, T=typeA},
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       Cterm {sign_ref=sign_ref, maxidx=maxidx, t=B, T=typeB})
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      end
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  | dest_comb _ = raise CTERM "dest_comb";
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(*Destruct abstraction in cterms*)
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fun dest_abs (Cterm {sign_ref, T as Type("fun",[_,S]), maxidx, t=Abs(x,ty,M)}) = 
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      let val (y,N) = variant_abs (x,ty,M)
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      in (Cterm {sign_ref = sign_ref, T = ty, maxidx = 0, t = Free(y,ty)},
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          Cterm {sign_ref = sign_ref, T = S, maxidx = maxidx, t = N})
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      end
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  | dest_abs _ = raise CTERM "dest_abs";
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(*Makes maxidx precise: it is often too big*)
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fun adjust_maxidx (ct as Cterm {sign_ref, T, t, maxidx, ...}) =
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  if maxidx = ~1 then ct 
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  else  Cterm {sign_ref = sign_ref, T = T, maxidx = maxidx_of_term t, t = t};
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(*Form cterm out of a function and an argument*)
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fun capply (Cterm {t=f, sign_ref=sign_ref1, T=Type("fun",[dty,rty]), maxidx=maxidx1})
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           (Cterm {t=x, sign_ref=sign_ref2, T, maxidx=maxidx2}) =
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      if T = dty then Cterm{t=f$x, sign_ref=Sign.merge_refs(sign_ref1,sign_ref2), T=rty,
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                            maxidx=Int.max(maxidx1, maxidx2)}
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      else raise CTERM "capply: types don't agree"
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  | capply _ _ = raise CTERM "capply: first arg is not a function"
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fun cabs (Cterm {t=Free(a,ty), sign_ref=sign_ref1, T=T1, maxidx=maxidx1})
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         (Cterm {t=t2, sign_ref=sign_ref2, T=T2, maxidx=maxidx2}) =
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      Cterm {t=absfree(a,ty,t2), sign_ref=Sign.merge_refs(sign_ref1,sign_ref2),
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             T = ty --> T2, maxidx=Int.max(maxidx1, maxidx2)}
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  | cabs _ _ = raise CTERM "cabs: first arg is not a free variable";
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(** read cterms **)   (*exception ERROR*)
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(*read terms, infer types, certify terms*)
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fun read_def_cterms (sign, types, sorts) used freeze sTs =
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  let
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    val syn = #syn (Sign.rep_sg sign)
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    fun read(s,T) =
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      let val T' = Sign.certify_typ sign T
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                   handle TYPE (msg, _, _) => error msg
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      in (Syntax.read syn T' s, T') end
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    val tsTs = map read sTs
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    val (ts',tye) = Sign.infer_types_simult sign types sorts used freeze tsTs;
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    val cts = map (cterm_of sign) ts'
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      handle TYPE (msg, _, _) => error msg
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           | TERM (msg, _) => error msg;
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  in (cts, tye) end;
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(*read term, infer types, certify term*)
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fun read_def_cterm args used freeze aT =
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  let val ([ct],tye) = read_def_cterms args used freeze [aT]
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  in (ct,tye) end;
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fun read_cterm sign = #1 o read_def_cterm (sign, K None, K None) [] true;
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(*read a list of terms, matching them against a list of expected types.
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  NO disambiguation of alternative parses via type-checking -- it is just
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  not practical.
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Why not? In any case, this function is not used at all.
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fun read_cterms sg (bs, Ts) =
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  let
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    val {tsig, syn, ...} = Sign.rep_sg sg;
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    fun read (b, T) =
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      (case Syntax.read syn T b of
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        [t] => t
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      | _  => error ("Error or ambiguity in parsing of " ^ b));
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    val prt = setmp Syntax.show_brackets true (Sign.pretty_term sg);
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    val prT = Sign.pretty_typ sg;
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    val (us, _) =
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      (* FIXME Sign.infer_types!? *)
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      Type.infer_types prt prT tsig (Sign.const_type sg) (K None) (K None)
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        (Sign.intern_const sg) (Sign.intern_tycons sg) (Sign.intern_sort sg)
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        [] true (map (Sign.certify_typ sg) Ts) (ListPair.map read (bs, Ts));
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  in map (cterm_of sg) us end
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  handle TYPE (msg, _, _) => error msg
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       | TERM (msg, _) => error msg;
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*)
250
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(*** Derivations ***)
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(*Names of rules in derivations.  Includes logically trivial rules, if 
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  executed in ML.*)
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datatype rule = 
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    MinProof                            (*for building minimal proof terms*)
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  | Oracle              of string * Sign.sg * object       (*oracles*)
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(*Axioms/theorems*)
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  | Axiom               of string
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  | Theorem             of string
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(*primitive inferences and compound versions of them*)
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  | Assume              of cterm
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  | Implies_intr        of cterm
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  | Implies_intr_shyps
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  | Implies_intr_hyps
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  | Implies_elim 
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  | Forall_intr         of cterm
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  | Forall_elim         of cterm
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  | Reflexive           of cterm
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  | Symmetric 
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  | Transitive
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  | Beta_conversion     of cterm
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  | Extensional
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  | Abstract_rule       of string * cterm
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  | Combination
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  | Equal_intr
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  | Equal_elim
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   340
(*derived rules for tactical proof*)
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  | Trivial             of cterm
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        (*For lift_rule, the proof state is not a premise.
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          Use cterm instead of thm to avoid mutual recursion.*)
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  | Lift_rule           of cterm * int 
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  | Assumption          of int * Envir.env option (*includes eq_assumption*)
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  | Rotate_rule         of int * int
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  | Instantiate         of (indexname * ctyp) list * (cterm * cterm) list
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   348
  | Bicompose           of bool * bool * int * int * Envir.env
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  | Flexflex_rule       of Envir.env            (*identifies unifier chosen*)
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(*other derived rules*)
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  | Class_triv          of class
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  | VarifyT
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   353
  | FreezeT
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   354
(*for the simplifier*)
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  | RewriteC            of cterm
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   356
  | CongC               of cterm
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   357
  | Rewrite_cterm       of cterm
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   358
(*Logical identities, recorded since they are part of the proof process*)
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   359
  | Rename_params_rule  of string list * int;
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   361
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   362
type deriv = rule mtree;
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   363
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   364
datatype deriv_kind = MinDeriv | ThmDeriv | FullDeriv;
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   365
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   366
val keep_derivs = ref MinDeriv;
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   367
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   368
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   369
(*Build a minimal derivation.  Keep oracles; suppress atomic inferences;
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   370
  retain Theorems or their underlying links; keep anything else*)
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   371
fun squash_derivs [] = []
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   372
  | squash_derivs (der::ders) =
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   373
     (case der of
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   374
          Join (Oracle _, _) => der :: squash_derivs ders
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   375
        | Join (Theorem _, [der']) => if !keep_derivs=ThmDeriv 
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   376
                                      then der :: squash_derivs ders
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   377
                                      else squash_derivs (der'::ders)
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   378
        | Join (Axiom _, _) => if !keep_derivs=ThmDeriv 
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   379
                               then der :: squash_derivs ders
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   380
                               else squash_derivs ders
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   381
        | Join (_, [])      => squash_derivs ders
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   382
        | _                 => der :: squash_derivs ders);
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parents: 1580
diff changeset
   383
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   384
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   385
(*Ensure sharing of the most likely derivation, the empty one!*)
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parents: 1580
diff changeset
   386
val min_infer = Join (MinProof, []);
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parents: 1517
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   387
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   388
(*Make a minimal inference*)
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   389
fun make_min_infer []    = min_infer
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   390
  | make_min_infer [der] = der
1597
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paulson
parents: 1580
diff changeset
   391
  | make_min_infer ders  = Join (MinProof, ders);
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parents: 1517
diff changeset
   392
1597
54ece585bf62 name_thm no longer takes a theory argument, as the
paulson
parents: 1580
diff changeset
   393
fun infer_derivs (rl, [])   = Join (rl, [])
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diff changeset
   394
  | infer_derivs (rl, ders) =
1597
54ece585bf62 name_thm no longer takes a theory argument, as the
paulson
parents: 1580
diff changeset
   395
    if !keep_derivs=FullDeriv then Join (rl, ders)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   396
    else make_min_infer (squash_derivs ders);
09d9ad015269 Addition of proof objects
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parents: 1517
diff changeset
   397
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   398
2509
0a7169d89b7a added termless parameter;
wenzelm
parents: 2386
diff changeset
   399
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
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parents: 309
diff changeset
   400
(*** Meta theorems ***)
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   401
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   402
datatype thm = Thm of
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   403
 {sign_ref: Sign.sg_ref,       (*mutable reference to signature*)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   404
  der: deriv,                  (*derivation*)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   405
  maxidx: int,                 (*maximum index of any Var or TVar*)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   406
  shyps: sort list,            (*sort hypotheses*)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   407
  hyps: term list,             (*hypotheses*)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   408
  prop: term};                 (*conclusion*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   409
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   410
fun rep_thm (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   411
  {sign = Sign.deref sign_ref, der = der, maxidx = maxidx,
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   412
    shyps = shyps, hyps = hyps, prop = prop};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   413
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   414
(*Version of rep_thm returning cterms instead of terms*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   415
fun crep_thm (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   416
  let fun ctermf max t = Cterm{sign_ref=sign_ref, t=t, T=propT, maxidx=max};
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   417
  in {sign = Sign.deref sign_ref, der = der, maxidx = maxidx, shyps = shyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   418
      hyps = map (ctermf ~1) hyps,
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   419
      prop = ctermf maxidx prop}
1517
d2f865740d8e added cabs and crep_thm
clasohm
parents: 1516
diff changeset
   420
  end;
d2f865740d8e added cabs and crep_thm
clasohm
parents: 1516
diff changeset
   421
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   422
(*errors involving theorems*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   423
exception THM of string * int * thm list;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   424
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   425
(*equality of theorems uses equality of signatures and the
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   426
  a-convertible test for terms*)
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   427
fun eq_thm (th1, th2) =
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   428
  let
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   429
    val {sign = sg1, shyps = shyps1, hyps = hyps1, prop = prop1, ...} = rep_thm th1;
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   430
    val {sign = sg2, shyps = shyps2, hyps = hyps2, prop = prop2, ...} = rep_thm th2;
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   431
  in
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   432
    Sign.eq_sg (sg1, sg2) andalso
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   433
    eq_set_sort (shyps1, shyps2) andalso
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   434
    aconvs (hyps1, hyps2) andalso
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   435
    prop1 aconv prop2
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   436
  end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   437
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   438
fun sign_of_thm (Thm {sign_ref, ...}) = Sign.deref sign_ref;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   439
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   440
(*merge signatures of two theorems; raise exception if incompatible*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   441
fun merge_thm_sgs
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   442
    (th1 as Thm {sign_ref = sgr1, ...}, th2 as Thm {sign_ref = sgr2, ...}) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   443
  Sign.merge_refs (sgr1, sgr2) handle TERM (msg, _) => raise THM (msg, 0, [th1, th2]);
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   444
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   445
(*transfer thm to super theory (non-destructive)*)
4254
8ae7ace96c39 added transfer_sg;
wenzelm
parents: 4251
diff changeset
   446
fun transfer_sg sign' thm =
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   447
  let
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   448
    val Thm {sign_ref, der, maxidx, shyps, hyps, prop} = thm;
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   449
    val sign = Sign.deref sign_ref;
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   450
  in
4254
8ae7ace96c39 added transfer_sg;
wenzelm
parents: 4251
diff changeset
   451
    if Sign.eq_sg (sign, sign') then thm
8ae7ace96c39 added transfer_sg;
wenzelm
parents: 4251
diff changeset
   452
    else if Sign.subsig (sign, sign') then
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   453
      Thm {sign_ref = Sign.self_ref sign', der = der, maxidx = maxidx,
3895
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   454
        shyps = shyps, hyps = hyps, prop = prop}
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   455
    else raise THM ("transfer: not a super theory", 0, [thm])
b2463861c86a added transfer: theory -> thm -> thm;
wenzelm
parents: 3893
diff changeset
   456
  end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   457
4254
8ae7ace96c39 added transfer_sg;
wenzelm
parents: 4251
diff changeset
   458
val transfer = transfer_sg o sign_of;
8ae7ace96c39 added transfer_sg;
wenzelm
parents: 4251
diff changeset
   459
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   460
(*maps object-rule to tpairs*)
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   461
fun tpairs_of (Thm {prop, ...}) = #1 (Logic.strip_flexpairs prop);
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   462
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   463
(*maps object-rule to premises*)
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   464
fun prems_of (Thm {prop, ...}) =
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   465
  Logic.strip_imp_prems (Logic.skip_flexpairs prop);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   466
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   467
(*counts premises in a rule*)
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   468
fun nprems_of (Thm {prop, ...}) =
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   469
  Logic.count_prems (Logic.skip_flexpairs prop, 0);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   470
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   471
(*maps object-rule to conclusion*)
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   472
fun concl_of (Thm {prop, ...}) = Logic.strip_imp_concl prop;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   473
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   474
(*the statement of any thm is a cterm*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   475
fun cprop_of (Thm {sign_ref, maxidx, prop, ...}) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   476
  Cterm {sign_ref = sign_ref, maxidx = maxidx, T = propT, t = prop};
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   477
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   478
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   479
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   480
(** sort contexts of theorems **)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   481
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   482
(* basic utils *)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   483
2163
4d43e7486164 tuned fix_shyps a little bit more;
wenzelm
parents: 2147
diff changeset
   484
(*accumulate sorts suppressing duplicates; these are coded low levelly
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   485
  to improve efficiency a bit*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   486
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   487
fun add_typ_sorts (Type (_, Ts), Ss) = add_typs_sorts (Ts, Ss)
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   488
  | add_typ_sorts (TFree (_, S), Ss) = ins_sort(S,Ss)
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   489
  | add_typ_sorts (TVar (_, S), Ss) = ins_sort(S,Ss)
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   490
and add_typs_sorts ([], Ss) = Ss
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   491
  | add_typs_sorts (T :: Ts, Ss) = add_typs_sorts (Ts, add_typ_sorts (T, Ss));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   492
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   493
fun add_term_sorts (Const (_, T), Ss) = add_typ_sorts (T, Ss)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   494
  | add_term_sorts (Free (_, T), Ss) = add_typ_sorts (T, Ss)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   495
  | add_term_sorts (Var (_, T), Ss) = add_typ_sorts (T, Ss)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   496
  | add_term_sorts (Bound _, Ss) = Ss
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   497
  | add_term_sorts (Abs (_,T,t), Ss) = add_term_sorts (t, add_typ_sorts (T,Ss))
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   498
  | add_term_sorts (t $ u, Ss) = add_term_sorts (t, add_term_sorts (u, Ss));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   499
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   500
fun add_terms_sorts ([], Ss) = Ss
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   501
  | add_terms_sorts (t::ts, Ss) = add_terms_sorts (ts, add_term_sorts (t,Ss));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   502
1258
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   503
fun env_codT (Envir.Envir {iTs, ...}) = map snd iTs;
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   504
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   505
fun add_env_sorts (env, Ss) =
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   506
  add_terms_sorts (map snd (Envir.alist_of env),
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   507
    add_typs_sorts (env_codT env, Ss));
2a2d8c74a756 bicompose_aux: tuned fix_shyps;
wenzelm
parents: 1238
diff changeset
   508
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   509
fun add_thm_sorts (Thm {hyps, prop, ...}, Ss) =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   510
  add_terms_sorts (hyps, add_term_sorts (prop, Ss));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   511
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   512
fun add_thms_shyps ([], Ss) = Ss
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   513
  | add_thms_shyps (Thm {shyps, ...} :: ths, Ss) =
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   514
      add_thms_shyps (ths, union_sort(shyps,Ss));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   515
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   516
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   517
(*get 'dangling' sort constraints of a thm*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   518
fun extra_shyps (th as Thm {shyps, ...}) =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   519
  shyps \\ add_thm_sorts (th, []);
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   520
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   521
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   522
(* fix_shyps *)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   523
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   524
(*preserve sort contexts of rule premises and substituted types*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   525
fun fix_shyps thms Ts thm =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   526
  let
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   527
    val Thm {sign_ref, der, maxidx, hyps, prop, ...} = thm;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   528
    val shyps =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   529
      add_thm_sorts (thm, add_typs_sorts (Ts, add_thms_shyps (thms, [])));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   530
  in
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   531
    Thm {sign_ref = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   532
         der = der,             (*No new derivation, as other rules call this*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   533
         maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   534
         shyps = shyps, hyps = hyps, prop = prop}
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   535
  end;
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   536
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   537
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   538
(* strip_shyps *)       (* FIXME improve? (e.g. only minimal extra sorts) *)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   539
3061
25b2a895f864 improved tmp comment;
wenzelm
parents: 3037
diff changeset
   540
val force_strip_shyps = ref true;  (* FIXME tmp (since 1995/08/01) *)
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   541
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   542
(*remove extra sorts that are known to be syntactically non-empty*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   543
fun strip_shyps thm =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   544
  let
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   545
    val Thm {sign_ref, der, maxidx, shyps, hyps, prop} = thm;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   546
    val sorts = add_thm_sorts (thm, []);
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   547
    val maybe_empty = not o Sign.nonempty_sort (Sign.deref sign_ref) sorts;
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
   548
    val shyps' = filter (fn S => mem_sort(S,sorts) orelse maybe_empty S) shyps;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   549
  in
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   550
    Thm {sign_ref = sign_ref, der = der, maxidx = maxidx,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   551
         shyps =
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   552
         (if eq_set_sort (shyps',sorts) orelse 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   553
             not (!force_strip_shyps) then shyps'
3061
25b2a895f864 improved tmp comment;
wenzelm
parents: 3037
diff changeset
   554
          else    (* FIXME tmp (since 1995/08/01) *)
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   555
              (warning ("Removed sort hypotheses: " ^
2962
97ae96c72d8c Sorts.str_of_sort;
wenzelm
parents: 2792
diff changeset
   556
                        commas (map Sorts.str_of_sort (shyps' \\ sorts)));
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   557
               warning "Let's hope these sorts are non-empty!";
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   558
           sorts)),
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   559
      hyps = hyps, 
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   560
      prop = prop}
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   561
  end;
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   562
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   563
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   564
(* implies_intr_shyps *)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   565
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   566
(*discharge all extra sort hypotheses*)
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   567
fun implies_intr_shyps thm =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   568
  (case extra_shyps thm of
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   569
    [] => thm
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   570
  | xshyps =>
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   571
      let
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   572
        val Thm {sign_ref, der, maxidx, shyps, hyps, prop} = thm;
2182
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2177
diff changeset
   573
        val shyps' = ins_sort (logicS, shyps \\ xshyps);
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   574
        val used_names = foldr add_term_tfree_names (prop :: hyps, []);
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   575
        val names =
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   576
          tl (variantlist (replicate (length xshyps + 1) "'", used_names));
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   577
        val tfrees = map (TFree o rpair logicS) names;
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   578
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   579
        fun mk_insort (T, S) = map (Logic.mk_inclass o pair T) S;
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
   580
        val sort_hyps = List.concat (map2 mk_insort (tfrees, xshyps));
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   581
      in
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   582
        Thm {sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   583
             der = infer_derivs (Implies_intr_shyps, [der]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   584
             maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   585
             shyps = shyps',
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   586
             hyps = hyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   587
             prop = Logic.list_implies (sort_hyps, prop)}
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   588
      end);
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   589
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   590
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   591
(** Axioms **)
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   592
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   593
(*look up the named axiom in the theory*)
3812
66fa30839377 fixed get_axiom, invoke_oracle;
wenzelm
parents: 3789
diff changeset
   594
fun get_axiom theory raw_name =
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   595
  let
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   596
    val name = Sign.intern (sign_of theory) Theory.axiomK raw_name;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   597
    fun get_ax [] = raise Match
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   598
      | get_ax (thy :: thys) =
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   599
          let val {sign, axioms, parents, ...} = rep_theory thy
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   600
          in case Symtab.lookup (axioms, name) of
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   601
                Some t => fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   602
                           (Thm {sign_ref = Sign.self_ref sign,
4182
47067b5db7ef deriv: eliminated references to theory;
wenzelm
parents: 4124
diff changeset
   603
                                 der = infer_derivs (Axiom name, []),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   604
                                 maxidx = maxidx_of_term t,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   605
                                 shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   606
                                 hyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   607
                                 prop = t})
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   608
              | None => get_ax parents handle Match => get_ax thys
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   609
          end;
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   610
  in
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   611
    get_ax [theory] handle Match
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   612
      => raise THEORY ("No axiom " ^ quote name, [theory])
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   613
  end;
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   614
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   615
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   616
(*return additional axioms of this theory node*)
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   617
fun axioms_of thy =
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   618
  map (fn (s, _) => (s, get_axiom thy s))
3994
0343230ec85c eq_thm (from drule.ML);
wenzelm
parents: 3971
diff changeset
   619
    (Symtab.dest (#axioms (rep_theory thy)));
776
df8f91c0e57c improved axioms_of: returns thms as the manual says;
wenzelm
parents: 721
diff changeset
   620
1597
54ece585bf62 name_thm no longer takes a theory argument, as the
paulson
parents: 1580
diff changeset
   621
(*Attach a label to a theorem to make proof objects more readable*)
4018
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   622
fun name_thm (name, th as Thm {sign_ref, der, maxidx, shyps, hyps, prop}) =
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   623
  (case der of
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   624
    Join (Theorem _, _) => th
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   625
  | Join (Axiom _, _) => th
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   626
  | _ => Thm {sign_ref = sign_ref, der = Join (Theorem name, [der]),
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   627
      maxidx = maxidx, shyps = shyps, hyps = hyps, prop = prop});
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   628
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   629
fun name_of_thm (Thm {der, ...}) =
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   630
  (case der of
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   631
    Join (Theorem name, _) => name
4182
47067b5db7ef deriv: eliminated references to theory;
wenzelm
parents: 4124
diff changeset
   632
  | Join (Axiom name, _) => name
4018
09b77900af0f added name_of_thm;
wenzelm
parents: 3994
diff changeset
   633
  | _ => "");
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   634
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   635
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   636
(*Compression of theorems -- a separate rule, not integrated with the others,
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   637
  as it could be slow.*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   638
fun compress (Thm {sign_ref, der, maxidx, shyps, hyps, prop}) = 
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   639
    Thm {sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   640
         der = der,     (*No derivation recorded!*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   641
         maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   642
         shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   643
         hyps = map Term.compress_term hyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   644
         prop = Term.compress_term prop};
564
eec3a9222b50 added inferT_axm;
wenzelm
parents: 480
diff changeset
   645
387
69f4356d915d new datatype theory, supports 'draft theories' and incremental extension:
wenzelm
parents: 309
diff changeset
   646
2509
0a7169d89b7a added termless parameter;
wenzelm
parents: 2386
diff changeset
   647
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   648
(*** Meta rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   649
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   650
(*Check that term does not contain same var with different typing/sorting.
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   651
  If this check must be made, recalculate maxidx in hope of preventing its
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   652
  recurrence.*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   653
fun nodup_Vars (thm as Thm{sign_ref, der, maxidx, shyps, hyps, prop}) s =
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   654
  (Sign.nodup_Vars prop; 
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   655
   Thm {sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   656
         der = der,     
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   657
         maxidx = maxidx_of_term prop,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   658
         shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   659
         hyps = hyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   660
         prop = prop})
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   661
  handle TYPE(msg,Ts,ts) => raise TYPE(s^": "^msg,Ts,ts);
1495
b8b54847c77f Added check for duplicate vars with distinct types/sorts (nodup_Vars)
nipkow
parents: 1493
diff changeset
   662
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   663
(** 'primitive' rules **)
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   664
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   665
(*discharge all assumptions t from ts*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   666
val disch = gen_rem (op aconv);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   667
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   668
(*The assumption rule A|-A in a theory*)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   669
fun assume ct : thm =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   670
  let val Cterm {sign_ref, t=prop, T, maxidx} = ct
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   671
  in  if T<>propT then
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   672
        raise THM("assume: assumptions must have type prop", 0, [])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   673
      else if maxidx <> ~1 then
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   674
        raise THM("assume: assumptions may not contain scheme variables",
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   675
                  maxidx, [])
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   676
      else Thm{sign_ref   = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   677
               der    = infer_derivs (Assume ct, []), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   678
               maxidx = ~1, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   679
               shyps  = add_term_sorts(prop,[]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   680
               hyps   = [prop], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   681
               prop   = prop}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   682
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   683
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   684
(*Implication introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   685
    [A]
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   686
     :
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   687
     B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   688
  -------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   689
  A ==> B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   690
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   691
fun implies_intr cA (thB as Thm{sign_ref,der,maxidx,hyps,prop,...}) : thm =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   692
  let val Cterm {sign_ref=sign_refA, t=A, T, maxidx=maxidxA} = cA
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   693
  in  if T<>propT then
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   694
        raise THM("implies_intr: assumptions must have type prop", 0, [thB])
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   695
      else fix_shyps [thB] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   696
        (Thm{sign_ref = Sign.merge_refs (sign_ref,sign_refA),  
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   697
             der = infer_derivs (Implies_intr cA, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   698
             maxidx = Int.max(maxidxA, maxidx),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   699
             shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   700
             hyps = disch(hyps,A),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   701
             prop = implies$A$prop})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   702
      handle TERM _ =>
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   703
        raise THM("implies_intr: incompatible signatures", 0, [thB])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   704
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   705
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   706
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   707
(*Implication elimination
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   708
  A ==> B    A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   709
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   710
        B
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   711
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   712
fun implies_elim thAB thA : thm =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   713
    let val Thm{maxidx=maxA, der=derA, hyps=hypsA, prop=propA,...} = thA
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   714
        and Thm{sign_ref, der, maxidx, hyps, prop,...} = thAB;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   715
        fun err(a) = raise THM("implies_elim: "^a, 0, [thAB,thA])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   716
    in  case prop of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   717
            imp$A$B =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   718
                if imp=implies andalso  A aconv propA
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   719
                then fix_shyps [thAB, thA] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   720
                       (Thm{sign_ref= merge_thm_sgs(thAB,thA),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   721
                            der = infer_derivs (Implies_elim, [der,derA]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   722
                            maxidx = Int.max(maxA,maxidx),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   723
                            shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   724
                            hyps = union_term(hypsA,hyps),  (*dups suppressed*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   725
                            prop = B})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   726
                else err("major premise")
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   727
          | _ => err("major premise")
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   728
    end;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   729
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   730
(*Forall introduction.  The Free or Var x must not be free in the hypotheses.
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   731
    A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   732
  -----
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   733
  !!x.A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   734
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   735
fun forall_intr cx (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) =
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   736
  let val x = term_of cx;
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   737
      fun result(a,T) = fix_shyps [th] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   738
        (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   739
             der = infer_derivs (Forall_intr cx, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   740
             maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   741
             shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   742
             hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   743
             prop = all(T) $ Abs(a, T, abstract_over (x,prop))})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   744
  in  case x of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   745
        Free(a,T) =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   746
          if exists (apl(x, Logic.occs)) hyps
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   747
          then  raise THM("forall_intr: variable free in assumptions", 0, [th])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   748
          else  result(a,T)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   749
      | Var((a,_),T) => result(a,T)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   750
      | _ => raise THM("forall_intr: not a variable", 0, [th])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   751
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   752
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   753
(*Forall elimination
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   754
  !!x.A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   755
  ------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   756
  A[t/x]
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   757
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   758
fun forall_elim ct (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) : thm =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   759
  let val Cterm {sign_ref=sign_reft, t, T, maxidx=maxt} = ct
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   760
  in  case prop of
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   761
        Const("all",Type("fun",[Type("fun",[qary,_]),_])) $ A =>
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   762
          if T<>qary then
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   763
              raise THM("forall_elim: type mismatch", 0, [th])
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   764
          else let val thm = fix_shyps [th] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   765
                    (Thm{sign_ref= Sign.merge_refs(sign_ref,sign_reft),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   766
                         der = infer_derivs (Forall_elim ct, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   767
                         maxidx = Int.max(maxidx, maxt),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   768
                         shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   769
                         hyps = hyps,  
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   770
                         prop = betapply(A,t)})
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   771
               in if maxt >= 0 andalso maxidx >= 0
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   772
                  then nodup_Vars thm "forall_elim" 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   773
                  else thm (*no new Vars: no expensive check!*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   774
               end
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   775
      | _ => raise THM("forall_elim: not quantified", 0, [th])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   776
  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   777
  handle TERM _ =>
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   778
         raise THM("forall_elim: incompatible signatures", 0, [th]);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   779
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   780
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   781
(* Equality *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   782
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   783
(*The reflexivity rule: maps  t   to the theorem   t==t   *)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   784
fun reflexive ct =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   785
  let val Cterm {sign_ref, t, T, maxidx} = ct
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   786
  in  fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   787
       (Thm{sign_ref= sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   788
            der = infer_derivs (Reflexive ct, []),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   789
            shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   790
            hyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   791
            maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   792
            prop = Logic.mk_equals(t,t)})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   793
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   794
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   795
(*The symmetry rule
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   796
  t==u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   797
  ----
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   798
  u==t
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   799
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   800
fun symmetric (th as Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   801
  case prop of
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   802
      (eq as Const("==",_)) $ t $ u =>
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   803
        (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   804
          Thm{sign_ref = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   805
              der = infer_derivs (Symmetric, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   806
              maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   807
              shyps = shyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   808
              hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   809
              prop = eq$u$t}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   810
    | _ => raise THM("symmetric", 0, [th]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   811
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   812
(*The transitive rule
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   813
  t1==u    u==t2
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   814
  --------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   815
      t1==t2
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   816
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   817
fun transitive th1 th2 =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   818
  let val Thm{der=der1, maxidx=max1, hyps=hyps1, prop=prop1,...} = th1
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   819
      and Thm{der=der2, maxidx=max2, hyps=hyps2, prop=prop2,...} = th2;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   820
      fun err(msg) = raise THM("transitive: "^msg, 0, [th1,th2])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   821
  in case (prop1,prop2) of
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   822
       ((eq as Const("==",_)) $ t1 $ u, Const("==",_) $ u' $ t2) =>
1634
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
   823
          if not (u aconv u') then err"middle term"
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
   824
          else let val thm =      
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   825
              fix_shyps [th1, th2] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   826
                (Thm{sign_ref= merge_thm_sgs(th1,th2), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   827
                     der = infer_derivs (Transitive, [der1, der2]),
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   828
                     maxidx = Int.max(max1,max2), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   829
                     shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   830
                     hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   831
                     prop = eq$t1$t2})
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   832
                 in if max1 >= 0 andalso max2 >= 0
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   833
                    then nodup_Vars thm "transitive" 
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
   834
                    else thm (*no new Vars: no expensive check!*)
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   835
                 end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   836
     | _ =>  err"premises"
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   837
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   838
1160
8845eb5f0e5e added add_trrules_i;
wenzelm
parents: 1065
diff changeset
   839
(*Beta-conversion: maps (%x.t)(u) to the theorem (%x.t)(u) == t[u/x] *)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   840
fun beta_conversion ct =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   841
  let val Cterm {sign_ref, t, T, maxidx} = ct
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   842
  in  case t of
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   843
          Abs(_,_,bodt) $ u => fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   844
            (Thm{sign_ref = sign_ref,  
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   845
                 der = infer_derivs (Beta_conversion ct, []),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   846
                 maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   847
                 shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   848
                 hyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   849
                 prop = Logic.mk_equals(t, subst_bound (u,bodt))})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   850
        | _ =>  raise THM("beta_conversion: not a redex", 0, [])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   851
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   852
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   853
(*The extensionality rule   (proviso: x not free in f, g, or hypotheses)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   854
  f(x) == g(x)
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   855
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   856
     f == g
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   857
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   858
fun extensional (th as Thm{sign_ref, der, maxidx,shyps,hyps,prop}) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   859
  case prop of
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   860
    (Const("==",_)) $ (f$x) $ (g$y) =>
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   861
      let fun err(msg) = raise THM("extensional: "^msg, 0, [th])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   862
      in (if x<>y then err"different variables" else
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   863
          case y of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   864
                Free _ =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   865
                  if exists (apl(y, Logic.occs)) (f::g::hyps)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   866
                  then err"variable free in hyps or functions"    else  ()
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   867
              | Var _ =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   868
                  if Logic.occs(y,f)  orelse  Logic.occs(y,g)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   869
                  then err"variable free in functions"   else  ()
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   870
              | _ => err"not a variable");
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   871
          (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   872
          Thm{sign_ref = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   873
              der = infer_derivs (Extensional, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   874
              maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   875
              shyps = shyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   876
              hyps = hyps, 
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   877
              prop = Logic.mk_equals(f,g)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   878
      end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   879
 | _ =>  raise THM("extensional: premise", 0, [th]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   880
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   881
(*The abstraction rule.  The Free or Var x must not be free in the hypotheses.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   882
  The bound variable will be named "a" (since x will be something like x320)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   883
     t == u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   884
  ------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   885
  %x.t == %x.u
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   886
*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   887
fun abstract_rule a cx (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) =
229
4002c4cd450c Pure: MAJOR CHANGE. Moved ML types ctyp and cterm and their associated
lcp
parents: 225
diff changeset
   888
  let val x = term_of cx;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   889
      val (t,u) = Logic.dest_equals prop
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   890
            handle TERM _ =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   891
                raise THM("abstract_rule: premise not an equality", 0, [th])
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
   892
      fun result T = fix_shyps [th] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   893
          (Thm{sign_ref = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   894
               der = infer_derivs (Abstract_rule (a,cx), [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   895
               maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   896
               shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   897
               hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   898
               prop = Logic.mk_equals(Abs(a, T, abstract_over (x,t)),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   899
                                      Abs(a, T, abstract_over (x,u)))})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   900
  in  case x of
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   901
        Free(_,T) =>
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   902
         if exists (apl(x, Logic.occs)) hyps
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   903
         then raise THM("abstract_rule: variable free in assumptions", 0, [th])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
   904
         else result T
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   905
      | Var(_,T) => result T
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   906
      | _ => raise THM("abstract_rule: not a variable", 0, [th])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   907
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   908
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   909
(*The combination rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   910
  f == g  t == u
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   911
  --------------
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   912
   f(t) == g(u)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   913
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   914
fun combination th1 th2 =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   915
  let val Thm{der=der1, maxidx=max1, shyps=shyps1, hyps=hyps1, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   916
              prop=prop1,...} = th1
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   917
      and Thm{der=der2, maxidx=max2, shyps=shyps2, hyps=hyps2, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   918
              prop=prop2,...} = th2
1836
861e29c7cada Added type-checking to rule "combination". This corrects a fault
paulson
parents: 1802
diff changeset
   919
      fun chktypes (f,t) =
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   920
            (case fastype_of f of
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   921
                Type("fun",[T1,T2]) => 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   922
                    if T1 <> fastype_of t then
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   923
                         raise THM("combination: types", 0, [th1,th2])
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   924
                    else ()
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   925
                | _ => raise THM("combination: not function type", 0, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   926
                                 [th1,th2]))
1495
b8b54847c77f Added check for duplicate vars with distinct types/sorts (nodup_Vars)
nipkow
parents: 1493
diff changeset
   927
  in case (prop1,prop2)  of
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   928
       (Const("==",_) $ f $ g, Const("==",_) $ t $ u) =>
1836
861e29c7cada Added type-checking to rule "combination". This corrects a fault
paulson
parents: 1802
diff changeset
   929
          let val _   = chktypes (f,t)
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   930
              val thm = (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   931
                        Thm{sign_ref = merge_thm_sgs(th1,th2), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   932
                            der = infer_derivs (Combination, [der1, der2]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   933
                            maxidx = Int.max(max1,max2), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   934
                            shyps = union_sort(shyps1,shyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   935
                            hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   936
                            prop = Logic.mk_equals(f$t, g$u)}
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   937
          in if max1 >= 0 andalso max2 >= 0
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   938
             then nodup_Vars thm "combination" 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   939
             else thm (*no new Vars: no expensive check!*)  
2139
2c59b204b540 Only calls nodup_Vars if really necessary. We get a speedup of nearly 6%
paulson
parents: 2047
diff changeset
   940
          end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   941
     | _ =>  raise THM("combination: premises", 0, [th1,th2])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   942
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   943
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   944
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   945
(* Equality introduction
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   946
  A ==> B  B ==> A
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   947
  ----------------
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   948
       A == B
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   949
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   950
fun equal_intr th1 th2 =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   951
  let val Thm{der=der1,maxidx=max1, shyps=shyps1, hyps=hyps1, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   952
              prop=prop1,...} = th1
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   953
      and Thm{der=der2, maxidx=max2, shyps=shyps2, hyps=hyps2, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   954
              prop=prop2,...} = th2;
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   955
      fun err(msg) = raise THM("equal_intr: "^msg, 0, [th1,th2])
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   956
  in case (prop1,prop2) of
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   957
       (Const("==>",_) $ A $ B, Const("==>",_) $ B' $ A')  =>
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   958
          if A aconv A' andalso B aconv B'
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   959
          then
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   960
            (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   961
              Thm{sign_ref = merge_thm_sgs(th1,th2),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   962
                  der = infer_derivs (Equal_intr, [der1, der2]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   963
                  maxidx = Int.max(max1,max2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   964
                  shyps = union_sort(shyps1,shyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   965
                  hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   966
                  prop = Logic.mk_equals(A,B)}
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   967
          else err"not equal"
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   968
     | _ =>  err"premises"
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   969
  end;
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   970
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   971
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   972
(*The equal propositions rule
3529
31186470665f tuned warning;
wenzelm
parents: 3410
diff changeset
   973
  A == B  A
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   974
  ---------
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   975
      B
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   976
*)
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   977
fun equal_elim th1 th2 =
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   978
  let val Thm{der=der1, maxidx=max1, hyps=hyps1, prop=prop1,...} = th1
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   979
      and Thm{der=der2, maxidx=max2, hyps=hyps2, prop=prop2,...} = th2;
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   980
      fun err(msg) = raise THM("equal_elim: "^msg, 0, [th1,th2])
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   981
  in  case prop1  of
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   982
       Const("==",_) $ A $ B =>
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   983
          if not (prop2 aconv A) then err"not equal"  else
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   984
            fix_shyps [th1, th2] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
   985
              (Thm{sign_ref= merge_thm_sgs(th1,th2), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   986
                   der = infer_derivs (Equal_elim, [der1, der2]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   987
                   maxidx = Int.max(max1,max2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   988
                   shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   989
                   hyps = union_term(hyps1,hyps2),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
   990
                   prop = B})
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   991
     | _ =>  err"major premise"
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
   992
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   993
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   994
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
   995
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   996
(**** Derived rules ****)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   997
1503
7dba648ee25c Elimination of fully-functorial style.
paulson
parents: 1495
diff changeset
   998
(*Discharge all hypotheses.  Need not verify cterms or call fix_shyps.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   999
  Repeated hypotheses are discharged only once;  fold cannot do this*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1000
fun implies_intr_hyps (Thm{sign_ref, der, maxidx, shyps, hyps=A::As, prop}) =
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1001
      implies_intr_hyps (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1002
            (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1003
                 der = infer_derivs (Implies_intr_hyps, [der]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1004
                 maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1005
                 shyps = shyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1006
                 hyps = disch(As,A),  
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1007
                 prop = implies$A$prop})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1008
  | implies_intr_hyps th = th;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1009
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1010
(*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
  1011
  Instantiates the theorem and deletes trivial tpairs.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1012
  Resulting sequence may contain multiple elements if the tpairs are
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1013
    not all flex-flex. *)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1014
fun flexflex_rule (th as Thm{sign_ref, der, maxidx, hyps, prop,...}) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1015
  let fun newthm env =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1016
          if Envir.is_empty env then th
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1017
          else
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1018
          let val (tpairs,horn) =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1019
                        Logic.strip_flexpairs (Envir.norm_term env prop)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1020
                (*Remove trivial tpairs, of the form t=t*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1021
              val distpairs = filter (not o op aconv) tpairs
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1022
              val newprop = Logic.list_flexpairs(distpairs, horn)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1023
          in  fix_shyps [th] (env_codT env)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1024
                (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1025
                     der = infer_derivs (Flexflex_rule env, [der]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1026
                     maxidx = maxidx_of_term newprop, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1027
                     shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1028
                     hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1029
                     prop = newprop})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1030
          end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1031
      val (tpairs,_) = Logic.strip_flexpairs prop
4270
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
  1032
  in Seq.map newthm
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1033
            (Unify.smash_unifiers(Sign.deref sign_ref, Envir.empty maxidx, tpairs))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1034
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1035
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1036
(*Instantiation of Vars
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1037
           A
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1038
  -------------------
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1039
  A[t1/v1,....,tn/vn]
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1040
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1041
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1042
(*Check that all the terms are Vars and are distinct*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1043
fun instl_ok ts = forall is_Var ts andalso null(findrep ts);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1044
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1045
(*For instantiate: process pair of cterms, merge theories*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1046
fun add_ctpair ((ct,cu), (sign_ref,tpairs)) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1047
  let val Cterm {sign_ref=sign_reft, t=t, T= T, ...} = ct
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1048
      and Cterm {sign_ref=sign_refu, t=u, T= U, ...} = cu
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1049
  in
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1050
    if T=U then
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1051
      (Sign.merge_refs (sign_ref, Sign.merge_refs (sign_reft, sign_refu)), (t,u)::tpairs)
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1052
    else raise TYPE("add_ctpair", [T,U], [t,u])
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1053
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1054
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1055
fun add_ctyp ((v,ctyp), (sign_ref',vTs)) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1056
  let val Ctyp {T,sign_ref} = ctyp
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1057
  in (Sign.merge_refs(sign_ref,sign_ref'), (v,T)::vTs) end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1058
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1059
(*Left-to-right replacements: ctpairs = [...,(vi,ti),...].
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1060
  Instantiates distinct Vars by terms of same type.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1061
  Normalizes the new theorem! *)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1062
fun instantiate ([], []) th = th
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1063
  | instantiate (vcTs,ctpairs)  (th as Thm{sign_ref,der,maxidx,hyps,prop,...}) =
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1064
  let val (newsign_ref,tpairs) = foldr add_ctpair (ctpairs, (sign_ref,[]));
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1065
      val (newsign_ref,vTs) = foldr add_ctyp (vcTs, (newsign_ref,[]));
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1066
      val newprop =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1067
            Envir.norm_term (Envir.empty 0)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1068
              (subst_atomic tpairs
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1069
               (Type.inst_term_tvars(Sign.tsig_of (Sign.deref newsign_ref),vTs) prop))
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1070
      val newth =
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1071
            fix_shyps [th] (map snd vTs)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1072
              (Thm{sign_ref = newsign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1073
                   der = infer_derivs (Instantiate(vcTs,ctpairs), [der]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1074
                   maxidx = maxidx_of_term newprop, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1075
                   shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1076
                   hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1077
                   prop = newprop})
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1078
  in  if not(instl_ok(map #1 tpairs))
193
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
  1079
      then raise THM("instantiate: variables not distinct", 0, [th])
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
  1080
      else if not(null(findrep(map #1 vTs)))
b2be328e00c3 updated instantiate to deal with type clashes
nipkow
parents: 134
diff changeset
  1081
      then raise THM("instantiate: type variables not distinct", 0, [th])
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
  1082
      else nodup_Vars newth "instantiate"
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1083
  end
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1084
  handle TERM _ =>
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1085
           raise THM("instantiate: incompatible signatures",0,[th])
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1086
       | TYPE (msg,_,_) => raise THM("instantiate: type conflict: " ^ msg, 
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1087
				     0, [th]);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1088
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1089
(*The trivial implication A==>A, justified by assume and forall rules.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1090
  A can contain Vars, not so for assume!   *)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1091
fun trivial ct : thm =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1092
  let val Cterm {sign_ref, t=A, T, maxidx} = ct
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1093
  in  if T<>propT then
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1094
            raise THM("trivial: the term must have type prop", 0, [])
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1095
      else fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1096
        (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1097
             der = infer_derivs (Trivial ct, []), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1098
             maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1099
             shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1100
             hyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1101
             prop = implies$A$A})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1102
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1103
1503
7dba648ee25c Elimination of fully-functorial style.
paulson
parents: 1495
diff changeset
  1104
(*Axiom-scheme reflecting signature contents: "OFCLASS(?'a::c, c_class)" *)
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1105
fun class_triv thy c =
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1106
  let val sign = sign_of thy;
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1107
      val Cterm {sign_ref, t, maxidx, ...} =
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1108
          cterm_of sign (Logic.mk_inclass (TVar (("'a", 0), [c]), c))
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1109
            handle TERM (msg, _) => raise THM ("class_triv: " ^ msg, 0, []);
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1110
  in
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1111
    fix_shyps [] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1112
      (Thm {sign_ref = sign_ref, 
4182
47067b5db7ef deriv: eliminated references to theory;
wenzelm
parents: 4124
diff changeset
  1113
            der = infer_derivs (Class_triv c, []), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1114
            maxidx = maxidx, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1115
            shyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1116
            hyps = [], 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1117
            prop = t})
399
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1118
  end;
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1119
86cc2b98f9e0 added class_triv: theory -> class -> thm (for axclasses);
wenzelm
parents: 387
diff changeset
  1120
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1121
(* Replace all TFrees not in the hyps by new TVars *)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1122
fun varifyT(Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1123
  let val tfrees = foldr add_term_tfree_names (hyps,[])
1634
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
  1124
  in let val thm = (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1125
    Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1126
        der = infer_derivs (VarifyT, [der]), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1127
        maxidx = Int.max(0,maxidx), 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1128
        shyps = shyps, 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1129
        hyps = hyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1130
        prop = Type.varify(prop,tfrees)}
2147
0698ddfbf6e4 Now uses Int.max instead of max
paulson
parents: 2139
diff changeset
  1131
     in nodup_Vars thm "varifyT" end
1634
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
  1132
(* this nodup_Vars check can be removed if thms are guaranteed not to contain
9b9cdef70669 Plugged some more loopholes with nodup_Vars.
nipkow
parents: 1597
diff changeset
  1133
duplicate TVars with differnt sorts *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1134
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1135
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1136
(* Replace all TVars by new TFrees *)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1137
fun freezeT(Thm{sign_ref,der,maxidx,shyps,hyps,prop}) =
3410
98f59f455d57 freezeT now refers to Type.freeze_thaw
paulson
parents: 3061
diff changeset
  1138
  let val (prop',_) = Type.freeze_thaw prop
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1139
  in (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1140
    Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1141
        der = infer_derivs (FreezeT, [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1142
        maxidx = maxidx_of_term prop',
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1143
        shyps = shyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1144
        hyps = hyps,
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1145
        prop = prop'}
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1146
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1147
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1148
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1149
(*** Inference rules for tactics ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1150
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1151
(*Destruct proof state into constraints, other goals, goal(i), rest *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1152
fun dest_state (state as Thm{prop,...}, i) =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1153
  let val (tpairs,horn) = Logic.strip_flexpairs prop
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1154
  in  case  Logic.strip_prems(i, [], horn) of
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1155
          (B::rBs, C) => (tpairs, rev rBs, B, C)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1156
        | _ => raise THM("dest_state", i, [state])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1157
  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1158
  handle TERM _ => raise THM("dest_state", i, [state]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1159
309
3751567696bf restored the signature constraint :THM
lcp
parents: 305
diff changeset
  1160
(*Increment variables and parameters of orule as required for
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1161
  resolution with goal i of state. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1162
fun lift_rule (state, i) orule =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1163
  let val Thm{shyps=sshyps, prop=sprop, maxidx=smax, sign_ref=ssign_ref,...} = state
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1164
      val (Bi::_, _) = Logic.strip_prems(i, [], Logic.skip_flexpairs sprop)
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1165
        handle TERM _ => raise THM("lift_rule", i, [orule,state])
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1166
      val ct_Bi = Cterm {sign_ref=ssign_ref, maxidx=smax, T=propT, t=Bi}
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1167
      val (lift_abs,lift_all) = Logic.lift_fns(Bi,smax+1)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1168
      val (Thm{sign_ref, der, maxidx,shyps,hyps,prop}) = orule
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1169
      val (tpairs,As,B) = Logic.strip_horn prop
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1170
  in  (*no fix_shyps*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1171
      Thm{sign_ref = merge_thm_sgs(state,orule),
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1172
          der = infer_derivs (Lift_rule(ct_Bi, i), [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1173
          maxidx = maxidx+smax+1,
2177
8b365a3a6ed1 Changed some mem, ins and union calls to be monomorphic
paulson
parents: 2163
diff changeset
  1174
          shyps=union_sort(sshyps,shyps), 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1175
          hyps=hyps, 
1529
09d9ad015269 Addition of proof objects
paulson
parents: 1517
diff changeset
  1176
          prop = Logic.rule_of (map (pairself lift_abs) tpairs,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1177
                                map lift_all As,    
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1178
                                lift_all B)}
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1179
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1180
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1181
(*Solve subgoal Bi of proof state B1...Bn/C by assumption. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1182
fun assumption i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1183
  let val Thm{sign_ref,der,maxidx,hyps,prop,...} = state;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1184
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1185
      fun newth (env as Envir.Envir{maxidx, ...}, tpairs) =
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1186
        fix_shyps [state] (env_codT env)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1187
          (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1188
               der = infer_derivs (Assumption (i, Some env), [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1189
               maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1190
               shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1191
               hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1192
               prop = 
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1193
               if Envir.is_empty env then (*avoid wasted normalizations*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1194
                   Logic.rule_of (tpairs, Bs, C)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1195
               else (*normalize the new rule fully*)
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1196
                   Envir.norm_term env (Logic.rule_of (tpairs, Bs, C))});
4270
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
  1197
      fun addprfs [] = Seq.empty
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
  1198
        | addprfs ((t,u)::apairs) = Seq.make (fn()=> Seq.pull
957c887b89b5 changed Sequence interface (now Seq, in seq.ML);
wenzelm
parents: 4254
diff changeset
  1199
             (Seq.mapp newth
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1200
                (Unify.unifiers(Sign.deref sign_ref,Envir.empty maxidx, (t,u)::tpairs))
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1201
                (addprfs apairs)))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1202
  in  addprfs (Logic.assum_pairs Bi)  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1203
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1204
(*Solve subgoal Bi of proof state B1...Bn/C by assumption.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1205
  Checks if Bi's conclusion is alpha-convertible to one of its assumptions*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1206
fun eq_assumption i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1207
  let val Thm{sign_ref,der,maxidx,hyps,prop,...} = state;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1208
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1209
  in  if exists (op aconv) (Logic.assum_pairs Bi)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1210
      then fix_shyps [state] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1211
             (Thm{sign_ref = sign_ref, 
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1212
                  der = infer_derivs (Assumption (i,None), [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1213
                  maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1214
                  shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1215
                  hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1216
                  prop = Logic.rule_of(tpairs, Bs, C)})
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1217
      else  raise THM("eq_assumption", 0, [state])
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1218
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1219
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1220
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1221
(*For rotate_tac: fast rotation of assumptions of subgoal i*)
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1222
fun rotate_rule k i state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1223
  let val Thm{sign_ref,der,maxidx,hyps,prop,shyps} = state;
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1224
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1225
      val params = Logic.strip_params Bi
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1226
      and asms   = Logic.strip_assums_hyp Bi
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1227
      and concl  = Logic.strip_assums_concl Bi
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1228
      val n      = length asms
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1229
      fun rot m  = if 0=m orelse m=n then Bi
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1230
		   else if 0<m andalso m<n 
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1231
		   then list_all 
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1232
			   (params, 
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1233
			    Logic.list_implies(List.drop(asms, m) @ 
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1234
					       List.take(asms, m),
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1235
					       concl))
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1236
		   else raise THM("rotate_rule", m, [state])
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1237
  in  Thm{sign_ref = sign_ref, 
2671
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1238
	  der = infer_derivs (Rotate_rule (k,i), [der]),
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1239
	  maxidx = maxidx,
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1240
	  shyps = shyps,
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1241
	  hyps = hyps,
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1242
	  prop = Logic.rule_of(tpairs, Bs@[rot (if k<0 then n+k else k)], C)}
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1243
  end;
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1244
510d94c71dda Introduction of rotate_rule
paulson
parents: 2626
diff changeset
  1245
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1246
(** User renaming of parameters in a subgoal **)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1247
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1248
(*Calls error rather than raising an exception because it is intended
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1249
  for top-level use -- exception handling would not make sense here.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1250
  The names in cs, if distinct, are used for the innermost parameters;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1251
   preceding parameters may be renamed to make all params distinct.*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1252
fun rename_params_rule (cs, i) state =
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1253
  let val Thm{sign_ref,der,maxidx,hyps,...} = state
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1254
      val (tpairs, Bs, Bi, C) = dest_state(state,i)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1255
      val iparams = map #1 (Logic.strip_params Bi)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1256
      val short = length iparams - length cs
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1257
      val newnames =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1258
            if short<0 then error"More names than abstractions!"
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1259
            else variantlist(take (short,iparams), cs) @ cs
3037
99ed078e6ae7 rename_params_rule used to check if the new name clashed with a free name in
nipkow
parents: 3012
diff changeset
  1260
      val freenames = map (#1 o dest_Free) (term_frees Bi)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1261
      val newBi = Logic.list_rename_params (newnames, Bi)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1262
  in
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1263
  case findrep cs of
3565
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1264
     c::_ => (warning ("Can't rename.  Bound variables not distinct: " ^ c); 
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1265
	      state)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1569
diff changeset
  1266
   | [] => (case cs inter_string freenames of
3565
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1267
       a::_ => (warning ("Can't rename.  Bound/Free variable clash: " ^ a); 
c64410e701fb Now rename_params_rule merely issues warnings--and does nothing--if the
paulson
parents: 3558
diff changeset
  1268
		state)
1220
3b0b8408fc5f MAJOR changes:
wenzelm
parents: 1195
diff changeset
  1269
     | [] => fix_shyps [state] []
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3895
diff changeset
  1270
                (Thm{sign_ref = sign_ref,
2386
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1271
                     der = infer_derivs (Rename_params_rule(cs,i), [der]),
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1272
                     maxidx = maxidx,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1273
                     shyps = [],
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1274
                     hyps = hyps,
58f8ff014009 fixed warning;
wenzelm
parents: 2266
diff changeset
  1275
                     prop = Logic.rule_of(tpairs, Bs@[newBi], C)}))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1276
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1277
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1278
(*** Preservation of bound variable names ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1279
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1280
(*Scan a pair of terms; while they are similar,
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1281
  accumulate corresponding bound vars in "al"*)
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1282
fun match_bvs(Abs(x,_,s),Abs(y,_,t), al) =
1195
686e3eb613b9 match_bvs no longer puts a name in the alist if it is null ("")
lcp
parents: 1160
diff changeset
  1283
      match_bvs(s, t, if x="" orelse y="" then al
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1284
                                          else (x,y)::al)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1285
  | match_bvs(f$s, g$t, al) = match_bvs(f,g,match_bvs(s,t,al))
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1286
  | match_bvs(_,_,al) = al;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1287
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1288
(* strip abstractions created by parameters *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1289
fun match_bvars((s,t),al) = match_bvs(strip_abs_body s, strip_abs_body t, al);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1290
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1291
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1292
(* strip_apply f A(,B) strips off all assumptions/parameters from A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1293
   introduced by lifting over B, and applies f to remaining part of A*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1294
fun strip_apply f =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1295
  let fun strip(Const("==>",_)$ A1 $ B1,
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1296
                Const("==>",_)$ _  $ B2) = implies $ A1 $ strip(B1,B2)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1297
        | strip((c as Const("all",_)) $ Abs(a,T,t1),
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1298
                      Const("all",_)  $ Abs(_,_,t2)) = c$Abs(a,T,strip(t1,t2))
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1299
        | strip(A,_) = f A
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1300
  in strip end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1301
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1302
(*Use the alist to rename all bound variables and some unknowns in a term
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1303
  dpairs = current disagreement pairs;  tpairs = permanent ones (flexflex);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1304
  Preserves unknowns in tpairs and on lhs of dpairs. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1305
fun rename_bvs([],_,_,_) = I
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1306
  | rename_bvs(al,dpairs,tpairs,B) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1307
    let val vars = foldr add_term_vars
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1308
                        (map fst dpairs @ map fst tpairs @ map snd tpairs, [])
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1309
        (*unknowns appearing elsewhere be preserved!*)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1310
        val vids = map (#1 o #1 o dest_Var) vars;
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1311
        fun rename(t as Var((x,i),T)) =
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1312
                (case assoc(al,x) of
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1569
diff changeset
  1313
                   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
  1314
                              else Var((y,i),T)
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1315
                 | None=> t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1316
          | rename(Abs(x,T,t)) =
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1569
diff changeset
  1317
              Abs(case assoc_string(al,x) of Some(y) => y | None => x,
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1318
                  T, rename t)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1319
          | rename(f$t) = rename f $ rename t
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1320
          | rename(t) = t;
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1321
        fun strip_ren Ai = strip_apply rename (Ai,B)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1322
    in strip_ren end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1323
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1324
(*Function to rename bounds/unknowns in the argument, lifted over B*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1325
fun rename_bvars(dpairs, tpairs, B) =
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1326
        rename_bvs(foldr match_bvars (dpairs,[]), dpairs, tpairs, B);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1327
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1328
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1329
(*** RESOLUTION ***)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1330
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1331
(** Lifting optimizations **)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1332
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1333
(*strip off pairs of assumptions/parameters in parallel -- they are
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1334
  identical because of lifting*)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1335
fun strip_assums2 (Const("==>", _) $ _ $ B1,
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1336
                   Const("==>", _) $ _ $ B2) = strip_assums2 (B1,B2)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1337
  | strip_assums2 (Const("all",_)$Abs(a,T,t1),
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1338
                   Const("all",_)$Abs(_,_,t2)) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1339
      let val (B1,B2) = strip_assums2 (t1,t2)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1340
      in  (Abs(a,T,B1), Abs(a,T,B2))  end
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1341
  | strip_assums2 BB = BB;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1342
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1343
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1344
(*Faster normalization: skip assumptions that were lifted over*)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1345
fun norm_term_skip env 0 t = Envir.norm_term env t
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1346
  | norm_term_skip env n (Const("all",_)$Abs(a,T,t)) =
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1347
        let val Envir.Envir{iTs, ...} = env
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1348
            val T' = typ_subst_TVars iTs T
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1349
            (*Must instantiate types of parameters because they are flattened;
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1350
              this could be a NEW parameter*)
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1351
        in  all T' $ Abs(a, T', norm_term_skip env n t)  end
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1352
  | norm_term_skip env n (Const("==>", _) $ A $ B) =
1238
289c573327f0 considerably tuned shyps handling;
wenzelm
parents: 1229
diff changeset
  1353
        implies $ A $ norm_term_skip env (n-1) B
721
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1354
  | norm_term_skip env n t = error"norm_term_skip: too few assumptions??";
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1355
479832ff2d29 Pure/thm/norm_term_skip: new, for skipping normalization of the context
lcp
parents: 678
diff changeset
  1356
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1357
(*Composition of object rule r=(A1...Am/B) with proof state s=(B1...Bn/C)
250
9b5a069285ce extend_theory: changed type of "abbrs" arg;
wenzelm
parents: 242
diff changeset
  1358
  Unifies B with Bi, replacing subgoal i    (1 <= i <= n)
0