src/Pure/Isar/proof_context.ML
author wenzelm
Fri Nov 03 21:28:15 2000 +0100 (2000-11-03 ago)
changeset 10381 4dfbcad19bfb
parent 9733 99fda46926cc
child 10465 4aa6f8b5cdc4
permissions -rw-r--r--
fixed two obscurities of "fix": predeclare_terms;
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(*  Title:      Pure/Isar/proof_context.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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Proof context information.
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*)
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signature PROOF_CONTEXT =
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sig
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  type context
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  type exporter
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  exception CONTEXT of string * context
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  val theory_of: context -> theory
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  val sign_of: context -> Sign.sg
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  val prems_of: context -> thm list
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  val show_hyps: bool ref
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  val pretty_thm: thm -> Pretty.T
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  val verbose: bool ref
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  val setmp_verbose: ('a -> 'b) -> 'a -> 'b
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  val print_binds: context -> unit
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  val print_thms: context -> unit
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  val print_cases: context -> unit
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  val prems_limit: int ref
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  val pretty_prems: context -> Pretty.T list
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  val pretty_context: context -> Pretty.T list
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  val print_proof_data: theory -> unit
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  val init: theory -> context
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  val assumptions: context -> (cterm list * exporter) list
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  val fixed_names: context -> string list
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  val read_typ: context -> string -> typ
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  val read_typ_no_norm: context -> string -> typ
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  val cert_typ: context -> typ -> typ
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  val cert_typ_no_norm: context -> typ -> typ
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  val intern_skolem: context -> term -> term
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  val extern_skolem: context -> term -> term
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  val read_termTs: context -> (string * typ) list -> term list * (indexname * typ) list
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  val read_term: context -> string -> term
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  val read_prop: context -> string -> term
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  val read_termT_pats: context -> (string * typ) list -> term list
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  val read_term_pats: typ -> context -> string list -> term list
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  val read_prop_pats: context -> string list -> term list
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  val cert_term: context -> term -> term
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  val cert_prop: context -> term -> term
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  val cert_term_pats: typ -> context -> term list -> term list
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  val cert_prop_pats: context -> term list -> term list
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  val declare_term: term -> context -> context
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  val declare_terms: term list -> context -> context
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  val warn_extra_tfrees: context -> context -> context
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  val generalizeT: context -> context -> typ -> typ
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  val generalize: context -> context -> term -> term
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  val find_free: term -> string -> term option
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  val norm_hhf: thm -> thm
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  val export_wrt: bool -> context -> context option -> (thm -> thm Seq.seq) * (int -> tactic) list
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  val auto_bind_goal: term -> context -> context
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  val auto_bind_facts: string -> term list -> context -> context
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  val match_bind: bool -> (string list * string) list -> context -> context
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  val match_bind_i: bool -> (term list * term) list -> context -> context
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  val read_propp: context * (string * (string list * string list))
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    -> context * (term * (term list * term list))
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  val cert_propp: context * (term * (term list * term list))
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    -> context * (term * (term list * term list))
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  val bind_propp: context * (string * (string list * string list))
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    -> context * (term * (context -> context))
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  val bind_propp_i: context * (term * (term list * term list))
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    -> context * (term * (context -> context))
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  val get_thm: context -> string -> thm
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  val get_thm_closure: context -> string -> thm
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  val get_thms: context -> string -> thm list
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  val get_thms_closure: context -> string -> thm list
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  val put_thm: string * thm -> context -> context
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  val put_thms: string * thm list -> context -> context
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  val put_thmss: (string * thm list) list -> context -> context
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  val reset_thms: string -> context -> context
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  val have_thmss:
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    ((string * context attribute list) * (thm list * context attribute list) list) list ->
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      context -> context * (string * thm list) list
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  val assume: exporter
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    -> (string * context attribute list * (string * (string list * string list)) list) list
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    -> context -> context * ((string * thm list) list * thm list)
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  val assume_i: exporter
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    -> (string * context attribute list * (term * (term list * term list)) list) list
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    -> context -> context * ((string * thm list) list * thm list)
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  val read_vars: context * (string list * string option) -> context * (string list * typ option)
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  val cert_vars: context * (string list * typ option) -> context * (string list * typ option)
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  val fix: (string list * string option) list -> context -> context
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  val fix_i: (string list * typ option) list -> context -> context
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  val bind_skolem: context -> string list -> term -> term
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  val get_case: context -> string -> RuleCases.T
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  val add_cases: (string * RuleCases.T) list -> context -> context
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  val setup: (theory -> theory) list
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end;
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signature PRIVATE_PROOF_CONTEXT =
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sig
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  include PROOF_CONTEXT
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  val init_data: Object.kind -> (theory -> Object.T) * (context -> Object.T -> unit)
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    -> theory -> theory
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  val print_data: Object.kind -> context -> unit
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  val get_data: Object.kind -> (Object.T -> 'a) -> context -> 'a
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  val put_data: Object.kind -> ('a -> Object.T) -> 'a -> context -> context
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end;
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structure ProofContext: PRIVATE_PROOF_CONTEXT =
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struct
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(** datatype context **)
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type exporter =
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  (cterm list -> thm -> thm Seq.seq) * (bool -> int -> (int -> tactic) list);
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datatype context =
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  Context of
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   {thy: theory,                                                        (*current theory*)
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    data: Object.T Symtab.table,                                        (*user data*)
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    asms:
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      ((cterm list * exporter) list *                                   (*assumes: A ==> _*)
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        (string * thm list) list) *
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      ((string * string) list * string list),                           (*fixes: !!x. _*)
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    binds: (term * typ) option Vartab.table,                            (*term bindings*)
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    thms: thm list option Symtab.table,                                 (*local thms*)
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    cases: (string * RuleCases.T) list,                                 (*local contexts*)
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    defs:
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      typ Vartab.table *                                                (*type constraints*)
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      sort Vartab.table *                                               (*default sorts*)
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      (string list * term list Symtab.table)};                          (*used type variables*)
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exception CONTEXT of string * context;
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fun make_context (thy, data, asms, binds, thms, cases, defs) =
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  Context {thy = thy, data = data, asms = asms, binds = binds, thms = thms,
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    cases = cases, defs = defs};
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fun map_context f (Context {thy, data, asms, binds, thms, cases, defs}) =
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  make_context (f (thy, data, asms, binds, thms, cases, defs));
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fun theory_of (Context {thy, ...}) = thy;
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val sign_of = Theory.sign_of o theory_of;
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fun prems_of (Context {asms = ((_, asms), _), ...}) = flat (map #2 asms);
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(** print context information **)
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val show_hyps = ref false;
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fun pretty_thm thm =
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  if ! show_hyps then setmp Display.show_hyps true Display.pretty_thm_no_quote thm
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  else Display.pretty_cterm (#prop (Thm.crep_thm thm));
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val verbose = ref false;
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fun verb f x = if ! verbose then f (x ()) else [];
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fun verb_single x = verb Library.single x;
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fun setmp_verbose f x = Library.setmp verbose true f x;
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fun pretty_items prt name items =
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  let
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    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
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      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
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  in
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    if null items andalso not (! verbose) then []
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    else [Pretty.big_list name (map prt_itms items)]
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  end;
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(* term bindings *)
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val smash_option = fn (_, None) => None | (xi, Some b) => Some (xi, b);
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fun pretty_binds (ctxt as Context {binds, ...}) =
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  let
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    val prt_term = Sign.pretty_term (sign_of ctxt);
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    fun prt_bind (xi, (t, T)) = prt_term (Logic.mk_equals (Var (xi, T), t));
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    val bs = mapfilter smash_option (Vartab.dest binds);
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  in
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    if null bs andalso not (! verbose) then []
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    else [Pretty.big_list "term bindings:" (map prt_bind bs)]
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  end;
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val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
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(* local theorems *)
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fun pretty_thms (Context {thms, ...}) =
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  pretty_items pretty_thm "facts:" (mapfilter smash_option (Symtab.dest thms));
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val print_thms = Pretty.writeln o Pretty.chunks o pretty_thms;
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(* local contexts *)
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fun pretty_cases (ctxt as Context {cases, ...}) =
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  let
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    val prt_term = Sign.pretty_term (sign_of ctxt);
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    fun prt_sect _ _ [] = []
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      | prt_sect s prt xs = [Pretty.block (Pretty.breaks (Pretty.str s :: map prt xs))];
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    fun prt_case (name, (xs, ts)) = Pretty.block (Pretty.breaks
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      (Pretty.str (name ^ ":") ::
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        prt_sect "fix" (prt_term o Free) xs @
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        prt_sect "assume" (Pretty.quote o prt_term) ts));
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    val cases' = rev (Library.gen_distinct Library.eq_fst cases);
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  in
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    if null cases andalso not (! verbose) then []
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    else [Pretty.big_list "cases:" (map prt_case cases')]
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  end;
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val print_cases = Pretty.writeln o Pretty.chunks o pretty_cases;
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(* prems *)
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val prems_limit = ref 10;
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fun pretty_prems ctxt =
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  let
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    val limit = ! prems_limit;
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    val prems = prems_of ctxt;
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    val len = length prems;
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    val prt_prems =
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      (if len <= limit then [] else [Pretty.str "..."]) @
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      map pretty_thm (Library.drop (len - limit, prems));
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  in if null prems then [] else [Pretty.big_list "prems:" prt_prems] end;
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(* main context *)
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fun pretty_context (ctxt as Context {asms = (_, (fixes, _)), cases,
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    defs = (types, sorts, (used, _)), ...}) =
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  let
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    val sign = sign_of ctxt;
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    val prt_term = Sign.pretty_term sign;
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    val prt_typ = Sign.pretty_typ sign;
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    val prt_sort = Sign.pretty_sort sign;
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    (*theory*)
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    val pretty_thy = Pretty.block [Pretty.str "Theory:", Pretty.brk 1, Sign.pretty_sg sign];
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    (*fixes*)
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    fun prt_fix (x, x') = Pretty.block
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      [prt_term (Syntax.free x), Pretty.str " =", Pretty.brk 1, prt_term (Syntax.free x')];
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    fun prt_fixes [] = []
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      | prt_fixes xs = [Pretty.block (Pretty.str "fixed variables:" :: Pretty.brk 1 ::
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          Pretty.commas (map prt_fix xs))];
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    (*defaults*)
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    fun prt_atom prt prtT (x, X) = Pretty.block
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      [prt x, Pretty.str " ::", Pretty.brk 1, prtT X];
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    fun prt_var (x, ~1) = prt_term (Syntax.free x)
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      | prt_var xi = prt_term (Syntax.var xi);
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    fun prt_varT (x, ~1) = prt_typ (TFree (x, []))
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      | prt_varT xi = prt_typ (TVar (xi, []));
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    val prt_defT = prt_atom prt_var prt_typ;
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    val prt_defS = prt_atom prt_varT prt_sort;
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  in
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    verb_single (K pretty_thy) @
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    prt_fixes (rev (filter_out (can Syntax.dest_internal o #1) fixes)) @
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    pretty_prems ctxt @
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    verb pretty_binds (K ctxt) @
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    verb pretty_thms (K ctxt) @
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    verb pretty_cases (K ctxt) @
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    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
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    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
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    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
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  end;
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(** user data **)
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(* errors *)
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fun of_theory thy = "\nof theory " ^ Sign.str_of_sg (Theory.sign_of thy);
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fun err_inconsistent kinds =
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  error ("Attempt to merge different versions of " ^ commas_quote kinds ^ " proof data");
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fun err_dup_init thy kind =
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  error ("Duplicate initialization of " ^ quote kind ^ " proof data" ^ of_theory thy);
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fun err_undef ctxt kind =
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  raise CONTEXT ("Tried to access undefined " ^ quote kind ^ " proof data", ctxt);
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fun err_uninit ctxt kind =
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  raise CONTEXT ("Tried to access uninitialized " ^ quote kind ^ " proof data" ^
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    of_theory (theory_of ctxt), ctxt);
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fun err_access ctxt kind =
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  raise CONTEXT ("Unauthorized access to " ^ quote kind ^ " proof data" ^
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    of_theory (theory_of ctxt), ctxt);
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(* data kind 'Isar/proof_data' *)
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structure ProofDataDataArgs =
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struct
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  val name = "Isar/proof_data";
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  type T = (Object.kind * ((theory -> Object.T) * (context -> Object.T -> unit))) Symtab.table;
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  val empty = Symtab.empty;
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  val copy = I;
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  val prep_ext = I;
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  fun merge tabs = Symtab.merge (Object.eq_kind o pairself fst) tabs
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    handle Symtab.DUPS kinds => err_inconsistent kinds;
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  fun print _ tab = Pretty.writeln (Pretty.strs (map #1 (Symtab.dest tab)));
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end;
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structure ProofDataData = TheoryDataFun(ProofDataDataArgs);
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val print_proof_data = ProofDataData.print;
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(* init proof data *)
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fun init_data kind meths thy =
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  let
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    val name = Object.name_of_kind kind;
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    val tab = Symtab.update_new ((name, (kind, meths)), ProofDataData.get thy)
wenzelm@5819
   330
      handle Symtab.DUP _ => err_dup_init thy name;
wenzelm@5819
   331
  in thy |> ProofDataData.put tab end;
wenzelm@5819
   332
wenzelm@5819
   333
wenzelm@5819
   334
(* access data *)
wenzelm@5819
   335
wenzelm@5819
   336
fun lookup_data (ctxt as Context {data, ...}) kind =
wenzelm@5819
   337
  let
wenzelm@5819
   338
    val thy = theory_of ctxt;
wenzelm@5819
   339
    val name = Object.name_of_kind kind;
wenzelm@5819
   340
  in
wenzelm@5819
   341
    (case Symtab.lookup (ProofDataData.get thy, name) of
wenzelm@5819
   342
      Some (k, meths) =>
wenzelm@5819
   343
        if Object.eq_kind (kind, k) then
wenzelm@5819
   344
          (case Symtab.lookup (data, name) of
wenzelm@5819
   345
            Some x => (x, meths)
wenzelm@5819
   346
          | None => err_undef ctxt name)
wenzelm@5819
   347
        else err_access ctxt name
wenzelm@5819
   348
    | None => err_uninit ctxt name)
wenzelm@5819
   349
  end;
wenzelm@5819
   350
wenzelm@5819
   351
fun get_data kind f ctxt =
wenzelm@5819
   352
  let val (x, _) = lookup_data ctxt kind
wenzelm@5819
   353
  in f x handle Match => Object.kind_error kind end;
wenzelm@5819
   354
wenzelm@5819
   355
fun print_data kind ctxt =
wenzelm@5819
   356
  let val (x, (_, prt)) = lookup_data ctxt kind
wenzelm@5819
   357
  in prt ctxt x end;
wenzelm@5819
   358
wenzelm@5819
   359
fun put_data kind f x ctxt =
wenzelm@8373
   360
 (lookup_data ctxt kind;
wenzelm@8373
   361
  ctxt |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   362
    (thy, Symtab.update ((Object.name_of_kind kind, f x), data), asms, binds, thms, cases, defs)));
wenzelm@5819
   363
wenzelm@5819
   364
wenzelm@5819
   365
(* init context *)
wenzelm@5819
   366
wenzelm@5874
   367
fun init thy =
wenzelm@5874
   368
  let val data = Symtab.map (fn (_, (f, _)) => f thy) (ProofDataData.get thy) in
wenzelm@8426
   369
    make_context (thy, data, (([], []), ([], [])), Vartab.empty, Symtab.empty, [],
wenzelm@8616
   370
      (Vartab.empty, Vartab.empty, ([], Symtab.empty)))
wenzelm@5819
   371
  end;
wenzelm@5819
   372
wenzelm@5819
   373
wenzelm@8616
   374
(* get assumptions *)
wenzelm@8616
   375
wenzelm@8616
   376
fun assumptions (Context {asms = ((asms, _), _), ...}) = asms;
wenzelm@8616
   377
fun fixed_names (Context {asms = (_, (fixes, _)), ...}) = map #2 fixes;
wenzelm@8616
   378
fun used_table (Context {defs = (_, _, (_, tab)), ...}) = tab;
wenzelm@8616
   379
wenzelm@8616
   380
wenzelm@8096
   381
wenzelm@7663
   382
(** default sorts and types **)
wenzelm@7663
   383
wenzelm@7670
   384
fun def_sort (Context {defs = (_, sorts, _), ...}) xi = Vartab.lookup (sorts, xi);
wenzelm@7663
   385
wenzelm@7670
   386
fun def_type (Context {binds, defs = (types, _, _), ...}) is_pat xi =
wenzelm@7663
   387
  (case Vartab.lookup (types, xi) of
wenzelm@7663
   388
    None =>
wenzelm@8616
   389
      if is_pat then None else
wenzelm@8616
   390
        (case Vartab.lookup (binds, xi) of
wenzelm@8616
   391
          Some (Some (_, T)) => Some (TypeInfer.polymorphicT T)
wenzelm@8616
   392
        | _ => None)
wenzelm@7663
   393
  | some => some);
wenzelm@7663
   394
wenzelm@7663
   395
wenzelm@5819
   396
wenzelm@5819
   397
(** prepare types **)
wenzelm@5819
   398
wenzelm@9504
   399
local
wenzelm@9504
   400
wenzelm@9504
   401
fun read_typ_aux read ctxt s =
wenzelm@9504
   402
  transform_error (read (sign_of ctxt, def_sort ctxt)) s
wenzelm@7663
   403
    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
wenzelm@5819
   404
wenzelm@9504
   405
fun cert_typ_aux cert ctxt raw_T = cert (sign_of ctxt) raw_T
wenzelm@9504
   406
  handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@9504
   407
wenzelm@9504
   408
in
wenzelm@9504
   409
wenzelm@9504
   410
val read_typ         = read_typ_aux Sign.read_typ;
wenzelm@9504
   411
val read_typ_no_norm = read_typ_aux Sign.read_typ_no_norm;
wenzelm@9504
   412
val cert_typ         = cert_typ_aux Sign.certify_typ;
wenzelm@9504
   413
val cert_typ_no_norm = cert_typ_aux Sign.certify_typ_no_norm;
wenzelm@9504
   414
wenzelm@9504
   415
end;
wenzelm@9504
   416
wenzelm@5819
   417
wenzelm@5819
   418
wenzelm@7679
   419
(* internalize Skolem constants *)
wenzelm@7679
   420
wenzelm@9133
   421
fun fixes_of (Context {asms = (_, (fixes, _)), ...}) = fixes;
wenzelm@9133
   422
fun get_skolem ctxt x = assoc (fixes_of ctxt, x);
wenzelm@7679
   423
wenzelm@9325
   424
fun no_skolem no_internal ctxt x =
wenzelm@9291
   425
  if can Syntax.dest_skolem x then
wenzelm@7679
   426
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@9325
   427
  else if no_internal andalso can Syntax.dest_internal x then
wenzelm@9291
   428
    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
wenzelm@7679
   429
  else x;
wenzelm@7679
   430
wenzelm@9291
   431
fun intern_skolem ctxt =
wenzelm@7679
   432
  let
wenzelm@7679
   433
    fun intern (t as Free (x, T)) =
wenzelm@9325
   434
          (case get_skolem ctxt (no_skolem true ctxt x) of
wenzelm@7679
   435
            Some x' => Free (x', T)
wenzelm@7679
   436
          | None => t)
wenzelm@7679
   437
      | intern (t $ u) = intern t $ intern u
wenzelm@7679
   438
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@7679
   439
      | intern a = a;
wenzelm@7679
   440
  in intern end;
wenzelm@7679
   441
wenzelm@7679
   442
wenzelm@9133
   443
(* externalize Skolem constants -- for printing purposes only *)
wenzelm@9133
   444
wenzelm@9133
   445
fun extern_skolem ctxt =
wenzelm@9133
   446
  let
wenzelm@9133
   447
    val rev_fixes = map Library.swap (fixes_of ctxt);
wenzelm@9133
   448
wenzelm@9133
   449
    fun extern (t as Free (x, T)) =
wenzelm@9133
   450
          (case assoc (rev_fixes, x) of
wenzelm@9133
   451
            Some x' => Free (if get_skolem ctxt x' = Some x then x' else NameSpace.hidden x', T)
wenzelm@9133
   452
          | None => t)
wenzelm@9133
   453
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   454
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   455
      | extern a = a;
wenzelm@9133
   456
  in extern end
wenzelm@9133
   457
wenzelm@8096
   458
wenzelm@5819
   459
(** prepare terms and propositions **)
wenzelm@5819
   460
wenzelm@5819
   461
(*
wenzelm@5819
   462
  (1) read / certify wrt. signature of context
wenzelm@5819
   463
  (2) intern Skolem constants
wenzelm@5819
   464
  (3) expand term bindings
wenzelm@5819
   465
*)
wenzelm@5819
   466
wenzelm@5819
   467
wenzelm@5819
   468
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   469
wenzelm@5874
   470
fun read_def_termTs freeze sg (types, sorts, used) sTs =
wenzelm@8616
   471
  Sign.read_def_terms (sg, types, sorts) used freeze sTs;
wenzelm@5874
   472
wenzelm@5874
   473
fun read_def_termT freeze sg defs sT = apfst hd (read_def_termTs freeze sg defs [sT]);
wenzelm@5874
   474
wenzelm@8096
   475
fun read_term_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, TypeInfer.logicT));
wenzelm@8096
   476
fun read_prop_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, propT));
wenzelm@5819
   477
wenzelm@5819
   478
wenzelm@5819
   479
fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   480
wenzelm@5819
   481
fun cert_prop_sg sg tm =
wenzelm@5819
   482
  let
wenzelm@5819
   483
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   484
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@5819
   485
  in
wenzelm@5819
   486
    if T = propT then t
wenzelm@5819
   487
    else raise TERM ("Term not of type prop", [t])
wenzelm@5819
   488
  end;
wenzelm@5819
   489
wenzelm@5819
   490
wenzelm@5819
   491
(* norm_term *)
wenzelm@5819
   492
wenzelm@5819
   493
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   494
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   495
wenzelm@8616
   496
fun unifyT ctxt (T, U) =
wenzelm@8616
   497
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@8616
   498
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) maxidx Vartab.empty (T, U)) end;
wenzelm@8616
   499
wenzelm@5819
   500
fun norm_term (ctxt as Context {binds, ...}) =
wenzelm@5819
   501
  let
wenzelm@5819
   502
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   503
    exception SAME;
wenzelm@5819
   504
wenzelm@5819
   505
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   506
          (case Vartab.lookup (binds, xi) of
wenzelm@7606
   507
            Some (Some (u, U)) =>
wenzelm@8616
   508
              let
wenzelm@8616
   509
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
wenzelm@8616
   510
                  raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u]);
wenzelm@8616
   511
                val u' = Term.subst_TVars_Vartab env u;
wenzelm@8616
   512
              in norm u' handle SAME => u' end
wenzelm@7606
   513
          | _ => raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   514
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   515
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   516
      | norm (f $ t) =
wenzelm@5819
   517
          ((case norm f of
wenzelm@5819
   518
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   519
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   520
      | norm _ =  raise SAME
wenzelm@5819
   521
    and normh t = norm t handle SAME => t
wenzelm@5819
   522
  in normh end;
wenzelm@5819
   523
wenzelm@5819
   524
wenzelm@6550
   525
(* dummy patterns *)
wenzelm@6550
   526
wenzelm@9540
   527
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   528
wenzelm@9540
   529
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   530
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   531
wenzelm@6550
   532
wenzelm@5819
   533
(* read terms *)
wenzelm@5819
   534
wenzelm@8616
   535
fun gen_read read app is_pat (ctxt as Context {defs = (_, _, (used, _)), ...}) s =
wenzelm@7663
   536
  (transform_error (read (sign_of ctxt) (def_type ctxt is_pat, def_sort ctxt, used)) s
wenzelm@7663
   537
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@7663
   538
    | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@9291
   539
  |> app (intern_skolem ctxt)
wenzelm@7663
   540
  |> app (if is_pat then I else norm_term ctxt)
wenzelm@7663
   541
  |> app (if is_pat then prepare_dummies else (reject_dummies ctxt));
wenzelm@5819
   542
wenzelm@5874
   543
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false;
wenzelm@8096
   544
val read_termT_pats = #1 oo gen_read (read_def_termTs false) (apfst o map) true;
wenzelm@8096
   545
wenzelm@8096
   546
fun read_term_pats T ctxt pats = read_termT_pats ctxt (map (rpair T) pats);
wenzelm@8096
   547
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   548
wenzelm@6762
   549
val read_term = gen_read (read_term_sg true) I false;
wenzelm@6762
   550
val read_prop = gen_read (read_prop_sg true) I false;
wenzelm@5819
   551
wenzelm@5819
   552
wenzelm@5819
   553
(* certify terms *)
wenzelm@5819
   554
wenzelm@8616
   555
fun gen_cert cert is_pat ctxt t = t
wenzelm@8616
   556
  |> (if is_pat then I else norm_term ctxt)
wenzelm@8616
   557
  |> (fn t' => cert (sign_of ctxt) t' handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   558
wenzelm@5819
   559
val cert_term = gen_cert cert_term_sg false;
wenzelm@5819
   560
val cert_prop = gen_cert cert_prop_sg false;
wenzelm@8096
   561
wenzelm@8096
   562
fun cert_term_pats _ = map o gen_cert cert_term_sg true;
wenzelm@8096
   563
val cert_prop_pats = map o gen_cert cert_prop_sg true;
wenzelm@5819
   564
wenzelm@5819
   565
wenzelm@5819
   566
(* declare terms *)
wenzelm@5819
   567
wenzelm@10381
   568
local
wenzelm@10381
   569
wenzelm@5819
   570
val ins_types = foldl_aterms
wenzelm@5819
   571
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   572
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   573
    | (types, _) => types);
wenzelm@5819
   574
wenzelm@5819
   575
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   576
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   577
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   578
    | (sorts, _) => sorts));
wenzelm@5819
   579
wenzelm@8616
   580
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@8616
   581
  (fn ((used, tab), TFree (x, _)) => (x ins used, Symtab.update_multi ((x, t), tab))
wenzelm@5819
   582
    | (used, _) => used));
wenzelm@5819
   583
wenzelm@7663
   584
fun ins_skolem def_ty = foldr
wenzelm@5994
   585
  (fn ((x, x'), types) =>
wenzelm@7663
   586
    (case def_ty x' of
wenzelm@5994
   587
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   588
    | None => types));
wenzelm@5994
   589
wenzelm@8373
   590
fun map_defaults f = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   591
  (thy, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   592
wenzelm@10381
   593
fun declare_syn (ctxt, t) =
wenzelm@5819
   594
  ctxt
wenzelm@7670
   595
  |> map_defaults (fn (types, sorts, used) => (ins_types (types, t), sorts, used))
wenzelm@10381
   596
  |> map_defaults (fn (types, sorts, used) => (types, ins_sorts (sorts, t), used));
wenzelm@10381
   597
wenzelm@10381
   598
fun declare_occ (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@10381
   599
  declare_syn (ctxt, t)
wenzelm@7670
   600
  |> map_defaults (fn (types, sorts, used) => (types, sorts, ins_used (used, t)))
wenzelm@7670
   601
  |> map_defaults (fn (types, sorts, used) =>
wenzelm@7670
   602
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, used));
wenzelm@5819
   603
wenzelm@10381
   604
in
wenzelm@5819
   605
wenzelm@10381
   606
fun declare_term t ctxt = declare_occ (ctxt, t);
wenzelm@10381
   607
fun declare_terms ts ctxt = foldl declare_occ (ctxt, ts);
wenzelm@10381
   608
fun predeclare_terms ts ctxt = foldl declare_syn (ctxt, ts);
wenzelm@10381
   609
wenzelm@10381
   610
end;
wenzelm@5819
   611
wenzelm@5819
   612
wenzelm@8616
   613
wenzelm@8616
   614
(** Hindley-Milner polymorphism **)
wenzelm@8616
   615
wenzelm@7925
   616
(* warn_extra_tfrees *)
wenzelm@7925
   617
wenzelm@8616
   618
local
wenzelm@8616
   619
wenzelm@8616
   620
fun used_free (a, ts) =
wenzelm@8616
   621
  (case mapfilter (fn Free (x, _) => Some x | _ => None) ts of
wenzelm@8616
   622
    [] => None
wenzelm@8616
   623
  | xs => Some (a, xs));
wenzelm@8616
   624
wenzelm@8616
   625
fun warn_extra (names1: string list, tab1) (names2, tab2) =
wenzelm@8616
   626
  if names1 = names2 then ()
wenzelm@7925
   627
  else
wenzelm@8616
   628
    let
wenzelm@8616
   629
      val extra =
wenzelm@8616
   630
        Library.gen_rems Library.eq_fst (Symtab.dest tab2, Symtab.dest tab1)
wenzelm@8616
   631
        |> mapfilter used_free;
wenzelm@8616
   632
      val tfrees = map #1 extra;
wenzelm@8616
   633
      val frees = Library.sort_strings (Library.distinct (flat (map #2 extra)));
wenzelm@8616
   634
    in
wenzelm@8616
   635
      if null extra then ()
wenzelm@8616
   636
      else warning ("Danger! Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@8616
   637
          space_implode " or " frees)
wenzelm@8616
   638
    end;
wenzelm@8616
   639
wenzelm@8616
   640
in
wenzelm@7925
   641
wenzelm@7925
   642
fun warn_extra_tfrees (ctxt1 as Context {defs = (_, _, used1), ...})
wenzelm@7925
   643
    (ctxt2 as Context {defs = (_, _, used2), ...}) = (warn_extra used1 used2; ctxt2);
wenzelm@7925
   644
wenzelm@8616
   645
end;
wenzelm@8616
   646
wenzelm@8616
   647
wenzelm@8616
   648
(* generalize type variables *)
wenzelm@8616
   649
wenzelm@8616
   650
fun gen_tfrees inner opt_outer =
wenzelm@8616
   651
  let
wenzelm@8616
   652
    val inner_used = used_table inner;
wenzelm@8616
   653
    val inner_fixes = fixed_names inner;
wenzelm@8616
   654
    val (outer_used, outer_fixes) =
wenzelm@8616
   655
      (case opt_outer of
wenzelm@8616
   656
        None => (Symtab.empty, [])
wenzelm@8616
   657
      | Some ctxt => (used_table ctxt, fixed_names ctxt));
wenzelm@8616
   658
wenzelm@8616
   659
    val extra_fixes = inner_fixes \\ outer_fixes;
wenzelm@8616
   660
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   661
      | still_fixed _ = false;
wenzelm@8616
   662
wenzelm@8616
   663
    fun add (gen, (a, xs)) =
wenzelm@8616
   664
      if is_some (Symtab.lookup (outer_used, a)) orelse exists still_fixed xs
wenzelm@8616
   665
      then gen else a :: gen;
wenzelm@8616
   666
  in Symtab.foldl add ([], inner_used) end;
wenzelm@8616
   667
wenzelm@8616
   668
fun generalizeT inner outer =
wenzelm@8616
   669
  let
wenzelm@8616
   670
    val tfrees = gen_tfrees inner (Some outer);
wenzelm@8616
   671
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@8616
   672
  in Term.map_type_tfree gen end;
wenzelm@8616
   673
wenzelm@8616
   674
val generalize = Term.map_term_types oo generalizeT;
wenzelm@8616
   675
wenzelm@8616
   676
wenzelm@9553
   677
wenzelm@9553
   678
(** export theorems **)
wenzelm@8616
   679
wenzelm@8616
   680
fun get_free x (None, t as Free (y, _)) = if x = y then Some t else None
wenzelm@8616
   681
  | get_free _ (opt, _) = opt;
wenzelm@8616
   682
wenzelm@8616
   683
fun find_free t x = foldl_aterms (get_free x) (None, t);
wenzelm@8616
   684
wenzelm@9553
   685
val norm_hhf =
wenzelm@9553
   686
  Drule.forall_elim_vars_safe o Tactic.rewrite_rule [Drule.norm_hhf_eq];
wenzelm@9553
   687
wenzelm@8616
   688
wenzelm@8616
   689
local
wenzelm@8616
   690
wenzelm@9470
   691
fun export tfrees fixes goal_asms thm =
wenzelm@9470
   692
  thm
wenzelm@9553
   693
  |> norm_hhf
wenzelm@9470
   694
  |> Seq.EVERY (rev (map op |> goal_asms))
wenzelm@9470
   695
  |> Seq.map (fn rule =>
wenzelm@9470
   696
    let
wenzelm@9470
   697
      val {sign, prop, maxidx, ...} = Thm.rep_thm rule;
wenzelm@9470
   698
      val frees = map (Thm.cterm_of sign) (mapfilter (find_free prop) fixes);
wenzelm@9470
   699
    in
wenzelm@9470
   700
      rule
wenzelm@9470
   701
      |> Drule.forall_intr_list frees
wenzelm@9553
   702
      |> norm_hhf
wenzelm@9470
   703
      |> Drule.tvars_intr_list tfrees
wenzelm@9470
   704
    end);
wenzelm@8616
   705
wenzelm@8616
   706
fun diff_context inner None = (gen_tfrees inner None, fixed_names inner, assumptions inner)
wenzelm@8616
   707
  | diff_context inner (Some outer) =
wenzelm@8616
   708
      (gen_tfrees inner (Some outer),
wenzelm@8616
   709
        fixed_names inner \\ fixed_names outer,
wenzelm@8616
   710
        Library.drop (length (assumptions outer), assumptions inner));
wenzelm@8616
   711
wenzelm@8616
   712
in
wenzelm@8616
   713
wenzelm@9470
   714
fun export_wrt is_goal inner opt_outer =
wenzelm@8616
   715
  let
wenzelm@8616
   716
    val (tfrees, fixes, asms) = diff_context inner opt_outer;
wenzelm@9470
   717
    val goal_asms = map (fn (cprops, (exp, _)) => (map Drule.mk_cgoal cprops, exp)) asms;
wenzelm@9470
   718
    val tacs = flat (map (fn (cprops, (_, f)) => f is_goal (length cprops)) asms);
wenzelm@9470
   719
  in (export tfrees fixes goal_asms, tacs) end;
wenzelm@8616
   720
wenzelm@8616
   721
end;
wenzelm@8616
   722
wenzelm@7925
   723
wenzelm@5819
   724
wenzelm@5819
   725
(** bindings **)
wenzelm@5819
   726
wenzelm@5819
   727
(* update_binds *)
wenzelm@5819
   728
wenzelm@7606
   729
fun del_bind (ctxt, xi) =
wenzelm@7606
   730
  ctxt
wenzelm@8373
   731
  |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   732
      (thy, data, asms, Vartab.update ((xi, None), binds), thms, cases, defs));
wenzelm@7606
   733
wenzelm@8616
   734
fun upd_bind (ctxt, ((x, i), t)) =
wenzelm@8616
   735
  let
wenzelm@8616
   736
    val T = Term.fastype_of t;
wenzelm@8616
   737
    val t' =
wenzelm@8616
   738
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   739
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   740
  in
wenzelm@5819
   741
    ctxt
wenzelm@8616
   742
    |> declare_term t'
wenzelm@8373
   743
    |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8616
   744
        (thy, data, asms, Vartab.update (((x, i), Some (t', T)), binds), thms, cases, defs))
wenzelm@5819
   745
  end;
wenzelm@5819
   746
wenzelm@7606
   747
fun del_upd_bind (ctxt, (xi, None)) = del_bind (ctxt, xi)
wenzelm@7606
   748
  | del_upd_bind (ctxt, (xi, Some t)) = upd_bind (ctxt, (xi, t));
wenzelm@7606
   749
wenzelm@5819
   750
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@7606
   751
fun delete_update_binds bs ctxt = foldl del_upd_bind (ctxt, bs);
wenzelm@7606
   752
wenzelm@5819
   753
wenzelm@8096
   754
(* simult_matches *)
wenzelm@8096
   755
wenzelm@8616
   756
fun simult_matches ctxt [] = []
wenzelm@8616
   757
  | simult_matches ctxt pairs =
wenzelm@8096
   758
      let
wenzelm@8096
   759
        val maxidx = foldl (fn (i, (t1, t2)) =>
wenzelm@8096
   760
          Int.max (i, Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2))) (~1, pairs);
wenzelm@8096
   761
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx, pairs);
wenzelm@8096
   762
        val env =
wenzelm@8096
   763
          (case Seq.pull envs of
wenzelm@8096
   764
            None => raise CONTEXT ("Pattern match failed!", ctxt)      (* FIXME improve msg (!?) *)
wenzelm@8096
   765
          | Some (env, _) => env);
wenzelm@8616
   766
        val binds =
wenzelm@8616
   767
          (*Note: Envir.norm_term ensures proper type instantiation*)
wenzelm@8616
   768
          map (apsnd (Envir.norm_term env)) (Envir.alist_of env);
wenzelm@8616
   769
      in binds end;
wenzelm@8096
   770
wenzelm@8096
   771
wenzelm@8096
   772
(* add_binds(_i) *)
wenzelm@5819
   773
wenzelm@7925
   774
local
wenzelm@7925
   775
wenzelm@5819
   776
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@7606
   777
  ctxt |> delete_update_binds [(xi, apsome (prep ctxt) raw_t)];
wenzelm@5819
   778
wenzelm@8616
   779
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@7925
   780
wenzelm@7925
   781
in
wenzelm@5819
   782
wenzelm@5819
   783
val add_binds = gen_binds read_term;
wenzelm@5819
   784
val add_binds_i = gen_binds cert_term;
wenzelm@8616
   785
wenzelm@7925
   786
val auto_bind_goal = add_binds_i o AutoBind.goal;
wenzelm@7925
   787
val auto_bind_facts = add_binds_i oo AutoBind.facts;
wenzelm@7925
   788
wenzelm@7925
   789
end;
wenzelm@5819
   790
wenzelm@5819
   791
wenzelm@8096
   792
(* match_bind(_i) *)
wenzelm@5819
   793
wenzelm@8096
   794
local
wenzelm@8096
   795
wenzelm@8616
   796
fun prep_bind (prep, prep_pats) (ctxt, (raw_pats, raw_t)) =
wenzelm@5819
   797
  let
wenzelm@5935
   798
    val t = prep ctxt raw_t;
wenzelm@8096
   799
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   800
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   801
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   802
  in (ctxt', binds) end;
wenzelm@7670
   803
wenzelm@8616
   804
fun gen_binds prepp gen raw_binds ctxt =
wenzelm@8616
   805
  let
wenzelm@8616
   806
    val (ctxt', binds) = apsnd flat (foldl_map (prep_bind prepp) (ctxt, raw_binds));
wenzelm@8616
   807
    val binds' =
wenzelm@8616
   808
      if gen then map (apsnd (generalize ctxt' ctxt)) binds
wenzelm@8616
   809
      else binds;
wenzelm@8616
   810
    val binds'' = map (apsnd Some) binds';
wenzelm@8616
   811
  in
wenzelm@8616
   812
    warn_extra_tfrees ctxt
wenzelm@8616
   813
     (if gen then ctxt (*sic!*) |> declare_terms (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   814
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   815
  end;
wenzelm@8096
   816
wenzelm@8096
   817
in
wenzelm@5935
   818
wenzelm@8096
   819
val match_bind = gen_binds (read_term, read_term_pats);
wenzelm@8096
   820
val match_bind_i = gen_binds (cert_term, cert_term_pats);
wenzelm@8096
   821
wenzelm@8096
   822
end;
wenzelm@5935
   823
wenzelm@5935
   824
wenzelm@8096
   825
(* proposition patterns *)
wenzelm@5935
   826
wenzelm@8096
   827
fun prep_propp prep_prop prep_pats (ctxt, (raw_prop, (raw_pats1, raw_pats2))) =
wenzelm@6931
   828
  let
wenzelm@8096
   829
    val prop = prep_prop ctxt raw_prop;
wenzelm@8096
   830
    val ctxt' = declare_term prop ctxt;
wenzelm@8096
   831
wenzelm@8096
   832
    val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@8096
   833
    val len1 = length raw_pats1;
wenzelm@8096
   834
  in (ctxt', (prop, (take (len1, pats), drop (len1, pats)))) end;
wenzelm@8096
   835
wenzelm@8096
   836
val read_propp = prep_propp read_prop read_prop_pats;
wenzelm@8096
   837
val cert_propp = prep_propp cert_prop cert_prop_pats;
wenzelm@5935
   838
wenzelm@8096
   839
wenzelm@8096
   840
fun gen_bind_propp prepp (ctxt, propp) =
wenzelm@8096
   841
  let
wenzelm@8096
   842
    val (ctxt', (prop, (pats1, pats2))) = prepp (ctxt, propp);
wenzelm@8616
   843
    val pairs =
wenzelm@8616
   844
      map (rpair prop) pats1 @
wenzelm@8616
   845
      map (rpair (Logic.strip_imp_concl prop)) pats2;   (* FIXME handle params!? *)
wenzelm@8616
   846
    val binds = simult_matches ctxt' pairs;
wenzelm@8616
   847
wenzelm@8616
   848
    (*note: context evaluated now, binds added later (lazy)*)
wenzelm@8616
   849
    val gen = generalize ctxt' ctxt;
wenzelm@8616
   850
    fun gen_binds ct = ct |> add_binds_i (map (apsnd (Some o gen)) binds);
wenzelm@8616
   851
  in (ctxt' |> add_binds_i (map (apsnd Some) binds), (prop, gen_binds)) end;
wenzelm@8096
   852
wenzelm@8096
   853
val bind_propp = gen_bind_propp read_propp;
wenzelm@8096
   854
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@6789
   855
wenzelm@6789
   856
wenzelm@5819
   857
wenzelm@5819
   858
(** theorems **)
wenzelm@5819
   859
wenzelm@6091
   860
(* get_thm(s) *)
wenzelm@5819
   861
wenzelm@9566
   862
(*beware of proper order of evaluation!*)
wenzelm@5819
   863
wenzelm@9566
   864
fun retrieve_thms f g (ctxt as Context {thy, thms, ...}) =
wenzelm@9566
   865
  let
wenzelm@9566
   866
    val sg_ref = Sign.self_ref (Theory.sign_of thy);
wenzelm@9566
   867
    val get_from_thy = f thy;
wenzelm@9566
   868
  in
wenzelm@9566
   869
    fn name =>
wenzelm@9566
   870
      (case Symtab.lookup (thms, name) of
wenzelm@9566
   871
        Some (Some ths) => map (Thm.transfer_sg (Sign.deref sg_ref)) ths
wenzelm@9566
   872
      | _ => get_from_thy name) |> g name
wenzelm@9566
   873
  end;
wenzelm@5819
   874
wenzelm@9566
   875
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   876
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   877
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   878
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   879
wenzelm@5819
   880
wenzelm@6091
   881
(* put_thm(s) *)
wenzelm@5819
   882
wenzelm@7479
   883
fun put_thms ("", _) = I
wenzelm@7479
   884
  | put_thms (name, ths) = map_context
wenzelm@8373
   885
      (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   886
        (thy, data, asms, binds, Symtab.update ((name, Some ths), thms), cases, defs));
wenzelm@5819
   887
wenzelm@6091
   888
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   889
wenzelm@6091
   890
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   891
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   892
wenzelm@5819
   893
wenzelm@7606
   894
(* reset_thms *)
wenzelm@7606
   895
wenzelm@8373
   896
fun reset_thms name = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   897
  (thy, data, asms, binds, Symtab.update ((name, None), thms), cases, defs));
wenzelm@7606
   898
wenzelm@7606
   899
wenzelm@6091
   900
(* have_thmss *)
wenzelm@5819
   901
wenzelm@9196
   902
fun have_thss (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
   903
  let
wenzelm@5819
   904
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   905
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   906
      in (ct', th' :: ths) end
wenzelm@5819
   907
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@9196
   908
    val thms = flat (rev rev_thms);
wenzelm@6091
   909
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   910
wenzelm@9196
   911
fun have_thmss args ctxt = foldl_map have_thss (ctxt, args);
wenzelm@9196
   912
wenzelm@5819
   913
wenzelm@5819
   914
wenzelm@5819
   915
(** assumptions **)
wenzelm@5819
   916
wenzelm@5819
   917
(* assume *)
wenzelm@5819
   918
wenzelm@7270
   919
local
wenzelm@6797
   920
wenzelm@9470
   921
fun gen_assm prepp (ctxt, (name, attrs, raw_prop_pats)) =
wenzelm@5819
   922
  let
wenzelm@8096
   923
    val (ctxt', props) = foldl_map prepp (ctxt, raw_prop_pats);
wenzelm@5819
   924
wenzelm@7575
   925
    val cprops = map (Thm.cterm_of (sign_of ctxt')) props;
wenzelm@9553
   926
    val asms = map (norm_hhf o Drule.assume_goal) cprops;
wenzelm@5919
   927
wenzelm@5919
   928
    val ths = map (fn th => ([th], [])) asms;
wenzelm@9196
   929
    val (ctxt'', [(_, thms)]) =
wenzelm@5819
   930
      ctxt'
wenzelm@6797
   931
      |> auto_bind_facts name props
wenzelm@9196
   932
      |> have_thmss [((name, attrs @ [Drule.tag_assumption]), ths)];
wenzelm@9470
   933
  in (ctxt'', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
   934
wenzelm@9470
   935
fun gen_assms prepp exp args ctxt =
wenzelm@9470
   936
  let
wenzelm@9470
   937
    val (ctxt', results) = foldl_map (gen_assm prepp) (ctxt, args);
wenzelm@9470
   938
    val cprops = flat (map #1 results);
wenzelm@9470
   939
    val asmss = map #2 results;
wenzelm@9470
   940
    val thmss = map #3 results;
wenzelm@9470
   941
    val ctxt'' =
wenzelm@9470
   942
      ctxt'
wenzelm@8373
   943
      |> map_context (fn (thy, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@9470
   944
        (thy, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@9470
   945
          cases, defs));
wenzelm@9470
   946
  in (warn_extra_tfrees ctxt ctxt'', (thmss, prems_of ctxt'')) end;
wenzelm@5819
   947
wenzelm@7270
   948
in
wenzelm@7270
   949
wenzelm@8616
   950
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
   951
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
   952
wenzelm@7270
   953
end;
wenzelm@5819
   954
wenzelm@5819
   955
wenzelm@8096
   956
(* variables *)
wenzelm@8096
   957
wenzelm@10381
   958
local
wenzelm@10381
   959
wenzelm@9291
   960
fun prep_vars prep_typ (ctxt, (xs, raw_T)) =
wenzelm@8096
   961
  let
wenzelm@9325
   962
    val _ = (case filter (not o Syntax.is_identifier) (map (no_skolem false ctxt) xs) of
wenzelm@8096
   963
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
   964
wenzelm@8096
   965
    val opt_T = apsome (prep_typ ctxt) raw_T;
wenzelm@8096
   966
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@10381
   967
    val ctxt' = ctxt |> predeclare_terms (map (fn x => Free (x, T)) xs);
wenzelm@8096
   968
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
   969
wenzelm@10381
   970
in
wenzelm@10381
   971
wenzelm@9291
   972
val read_vars = prep_vars read_typ;
wenzelm@9291
   973
val cert_vars = prep_vars cert_typ;
wenzelm@8096
   974
wenzelm@10381
   975
end;
wenzelm@10381
   976
wenzelm@8096
   977
wenzelm@5819
   978
(* fix *)
wenzelm@5819
   979
wenzelm@8096
   980
local
wenzelm@8096
   981
wenzelm@8096
   982
fun add_vars xs (fixes, names) =
wenzelm@8096
   983
  let
wenzelm@8096
   984
    val xs' = variantlist (xs, names);
wenzelm@8096
   985
    val fixes' = (xs ~~ map Syntax.skolem xs') @ fixes;
wenzelm@8096
   986
    val names' = xs' @ names;
wenzelm@8096
   987
  in (fixes', names') end;
wenzelm@8096
   988
wenzelm@8373
   989
fun map_vars f = map_context (fn (thy, data, (assumes, vars), binds, thms, cases, defs) =>
wenzelm@8373
   990
  (thy, data, (assumes, f vars), binds, thms, cases, defs));
wenzelm@5819
   991
wenzelm@8096
   992
fun gen_fix prep raw_vars ctxt =
wenzelm@8096
   993
  let
wenzelm@8096
   994
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
wenzelm@8096
   995
    val xs = flat (map fst varss);
wenzelm@8096
   996
  in
wenzelm@8096
   997
    (case Library.duplicates xs of
wenzelm@8096
   998
      [] => ()
wenzelm@8096
   999
    | dups => raise CONTEXT ("Duplicate variable name(s): " ^ commas_quote dups, ctxt));
wenzelm@8096
  1000
    ctxt' |> map_vars (add_vars xs)
wenzelm@8096
  1001
  end;
wenzelm@5819
  1002
wenzelm@8096
  1003
in
wenzelm@7679
  1004
wenzelm@8096
  1005
val fix = gen_fix read_vars;
wenzelm@8096
  1006
val fix_i = gen_fix cert_vars;
wenzelm@8096
  1007
wenzelm@8096
  1008
end;
wenzelm@5819
  1009
wenzelm@6895
  1010
wenzelm@9291
  1011
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
  1012
fun bind_skolem ctxt xs =
wenzelm@9291
  1013
  let
wenzelm@9291
  1014
    val ctxt' = ctxt |> fix_i [(xs, None)];
wenzelm@9291
  1015
    fun bind (t as Free (x, T)) =
wenzelm@9291
  1016
          if x mem_string xs then
wenzelm@9291
  1017
            (case get_skolem ctxt' x of Some x' => Free (x', T) | None => t)
wenzelm@9291
  1018
          else t
wenzelm@9291
  1019
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
  1020
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
  1021
      | bind a = a;
wenzelm@9291
  1022
  in bind end;
wenzelm@9291
  1023
wenzelm@9291
  1024
wenzelm@5819
  1025
wenzelm@8373
  1026
(** cases **)
wenzelm@8373
  1027
wenzelm@8403
  1028
fun check_case ctxt name (xs, ts) =
wenzelm@8403
  1029
  if null (foldr Term.add_typ_tvars (map snd xs, [])) andalso
wenzelm@8403
  1030
    null (foldr Term.add_term_vars (ts, [])) then ()
wenzelm@8403
  1031
  else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt);
wenzelm@8403
  1032
wenzelm@8373
  1033
fun get_case (ctxt as Context {cases, ...}) name =
wenzelm@8426
  1034
  (case assoc (cases, name) of
wenzelm@8373
  1035
    None => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
wenzelm@8403
  1036
  | Some c => (check_case ctxt name c; c));
wenzelm@8373
  1037
wenzelm@8384
  1038
wenzelm@8373
  1039
fun add_cases xs = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8426
  1040
  (thy, data, asms, binds, thms, rev (filter_out (equal "" o #1) xs) @ cases, defs));
wenzelm@8373
  1041
wenzelm@8373
  1042
wenzelm@8373
  1043
wenzelm@5819
  1044
(** theory setup **)
wenzelm@5819
  1045
wenzelm@5819
  1046
val setup = [ProofDataData.init];
wenzelm@5819
  1047
wenzelm@5819
  1048
wenzelm@5819
  1049
end;