src/Pure/Isar/proof_context.ML
author wenzelm
Thu Aug 03 00:41:07 2000 +0200 (2000-08-03 ago)
changeset 9504 8168600e88a5
parent 9470 705ca49129fc
child 9515 e6dfc9c9bf89
permissions -rw-r--r--
typ_no_norm;
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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 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 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 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_thms: context -> string -> thm list
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  val get_thmss: context -> string list -> 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 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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(* main context *)
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fun pretty_prems ctxt =
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  (case prems_of ctxt of
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    [] => []
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  | prems => [Pretty.big_list "prems:" (map pretty_thm prems)]);
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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 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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    (if null fixes then [] else [prt_fixes (rev 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)
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      handle Symtab.DUP _ => err_dup_init thy name;
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  in thy |> ProofDataData.put tab end;
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(* access data *)
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fun lookup_data (ctxt as Context {data, ...}) kind =
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  let
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    val thy = theory_of ctxt;
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    val name = Object.name_of_kind kind;
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  in
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    (case Symtab.lookup (ProofDataData.get thy, name) of
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      Some (k, meths) =>
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        if Object.eq_kind (kind, k) then
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          (case Symtab.lookup (data, name) of
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            Some x => (x, meths)
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          | None => err_undef ctxt name)
wenzelm@5819
   330
        else err_access ctxt name
wenzelm@5819
   331
    | None => err_uninit ctxt name)
wenzelm@5819
   332
  end;
wenzelm@5819
   333
wenzelm@5819
   334
fun get_data kind f ctxt =
wenzelm@5819
   335
  let val (x, _) = lookup_data ctxt kind
wenzelm@5819
   336
  in f x handle Match => Object.kind_error kind end;
wenzelm@5819
   337
wenzelm@5819
   338
fun print_data kind ctxt =
wenzelm@5819
   339
  let val (x, (_, prt)) = lookup_data ctxt kind
wenzelm@5819
   340
  in prt ctxt x end;
wenzelm@5819
   341
wenzelm@5819
   342
fun put_data kind f x ctxt =
wenzelm@8373
   343
 (lookup_data ctxt kind;
wenzelm@8373
   344
  ctxt |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   345
    (thy, Symtab.update ((Object.name_of_kind kind, f x), data), asms, binds, thms, cases, defs)));
wenzelm@5819
   346
wenzelm@5819
   347
wenzelm@5819
   348
(* init context *)
wenzelm@5819
   349
wenzelm@5874
   350
fun init thy =
wenzelm@5874
   351
  let val data = Symtab.map (fn (_, (f, _)) => f thy) (ProofDataData.get thy) in
wenzelm@8426
   352
    make_context (thy, data, (([], []), ([], [])), Vartab.empty, Symtab.empty, [],
wenzelm@8616
   353
      (Vartab.empty, Vartab.empty, ([], Symtab.empty)))
wenzelm@5819
   354
  end;
wenzelm@5819
   355
wenzelm@5819
   356
wenzelm@8616
   357
(* get assumptions *)
wenzelm@8616
   358
wenzelm@8616
   359
fun assumptions (Context {asms = ((asms, _), _), ...}) = asms;
wenzelm@8616
   360
fun fixed_names (Context {asms = (_, (fixes, _)), ...}) = map #2 fixes;
wenzelm@8616
   361
fun used_table (Context {defs = (_, _, (_, tab)), ...}) = tab;
wenzelm@8616
   362
wenzelm@8616
   363
wenzelm@8096
   364
wenzelm@7663
   365
(** default sorts and types **)
wenzelm@7663
   366
wenzelm@7670
   367
fun def_sort (Context {defs = (_, sorts, _), ...}) xi = Vartab.lookup (sorts, xi);
wenzelm@7663
   368
wenzelm@7670
   369
fun def_type (Context {binds, defs = (types, _, _), ...}) is_pat xi =
wenzelm@7663
   370
  (case Vartab.lookup (types, xi) of
wenzelm@7663
   371
    None =>
wenzelm@8616
   372
      if is_pat then None else
wenzelm@8616
   373
        (case Vartab.lookup (binds, xi) of
wenzelm@8616
   374
          Some (Some (_, T)) => Some (TypeInfer.polymorphicT T)
wenzelm@8616
   375
        | _ => None)
wenzelm@7663
   376
  | some => some);
wenzelm@7663
   377
wenzelm@7663
   378
wenzelm@5819
   379
wenzelm@5819
   380
(** prepare types **)
wenzelm@5819
   381
wenzelm@9504
   382
local
wenzelm@9504
   383
wenzelm@9504
   384
fun read_typ_aux read ctxt s =
wenzelm@9504
   385
  transform_error (read (sign_of ctxt, def_sort ctxt)) s
wenzelm@7663
   386
    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
wenzelm@5819
   387
wenzelm@9504
   388
fun cert_typ_aux cert ctxt raw_T = cert (sign_of ctxt) raw_T
wenzelm@9504
   389
  handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@9504
   390
wenzelm@9504
   391
in
wenzelm@9504
   392
wenzelm@9504
   393
val read_typ         = read_typ_aux Sign.read_typ;
wenzelm@9504
   394
val read_typ_no_norm = read_typ_aux Sign.read_typ_no_norm;
wenzelm@9504
   395
val cert_typ         = cert_typ_aux Sign.certify_typ;
wenzelm@9504
   396
val cert_typ_no_norm = cert_typ_aux Sign.certify_typ_no_norm;
wenzelm@9504
   397
wenzelm@9504
   398
end;
wenzelm@9504
   399
wenzelm@5819
   400
wenzelm@5819
   401
wenzelm@7679
   402
(* internalize Skolem constants *)
wenzelm@7679
   403
wenzelm@9133
   404
fun fixes_of (Context {asms = (_, (fixes, _)), ...}) = fixes;
wenzelm@9133
   405
fun get_skolem ctxt x = assoc (fixes_of ctxt, x);
wenzelm@7679
   406
wenzelm@9325
   407
fun no_skolem no_internal ctxt x =
wenzelm@9291
   408
  if can Syntax.dest_skolem x then
wenzelm@7679
   409
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@9325
   410
  else if no_internal andalso can Syntax.dest_internal x then
wenzelm@9291
   411
    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
wenzelm@7679
   412
  else x;
wenzelm@7679
   413
wenzelm@9291
   414
fun intern_skolem ctxt =
wenzelm@7679
   415
  let
wenzelm@7679
   416
    fun intern (t as Free (x, T)) =
wenzelm@9325
   417
          (case get_skolem ctxt (no_skolem true ctxt x) of
wenzelm@7679
   418
            Some x' => Free (x', T)
wenzelm@7679
   419
          | None => t)
wenzelm@7679
   420
      | intern (t $ u) = intern t $ intern u
wenzelm@7679
   421
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@7679
   422
      | intern a = a;
wenzelm@7679
   423
  in intern end;
wenzelm@7679
   424
wenzelm@7679
   425
wenzelm@9133
   426
(* externalize Skolem constants -- for printing purposes only *)
wenzelm@9133
   427
wenzelm@9133
   428
fun extern_skolem ctxt =
wenzelm@9133
   429
  let
wenzelm@9133
   430
    val rev_fixes = map Library.swap (fixes_of ctxt);
wenzelm@9133
   431
wenzelm@9133
   432
    fun extern (t as Free (x, T)) =
wenzelm@9133
   433
          (case assoc (rev_fixes, x) of
wenzelm@9133
   434
            Some x' => Free (if get_skolem ctxt x' = Some x then x' else NameSpace.hidden x', T)
wenzelm@9133
   435
          | None => t)
wenzelm@9133
   436
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   437
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   438
      | extern a = a;
wenzelm@9133
   439
  in extern end
wenzelm@9133
   440
wenzelm@8096
   441
wenzelm@5819
   442
(** prepare terms and propositions **)
wenzelm@5819
   443
wenzelm@5819
   444
(*
wenzelm@5819
   445
  (1) read / certify wrt. signature of context
wenzelm@5819
   446
  (2) intern Skolem constants
wenzelm@5819
   447
  (3) expand term bindings
wenzelm@5819
   448
*)
wenzelm@5819
   449
wenzelm@5819
   450
wenzelm@5819
   451
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   452
wenzelm@5874
   453
fun read_def_termTs freeze sg (types, sorts, used) sTs =
wenzelm@8616
   454
  Sign.read_def_terms (sg, types, sorts) used freeze sTs;
wenzelm@5874
   455
wenzelm@5874
   456
fun read_def_termT freeze sg defs sT = apfst hd (read_def_termTs freeze sg defs [sT]);
wenzelm@5874
   457
wenzelm@8096
   458
fun read_term_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, TypeInfer.logicT));
wenzelm@8096
   459
fun read_prop_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, propT));
wenzelm@5819
   460
wenzelm@5819
   461
wenzelm@5819
   462
fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   463
wenzelm@5819
   464
fun cert_prop_sg sg tm =
wenzelm@5819
   465
  let
wenzelm@5819
   466
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   467
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@5819
   468
  in
wenzelm@5819
   469
    if T = propT then t
wenzelm@5819
   470
    else raise TERM ("Term not of type prop", [t])
wenzelm@5819
   471
  end;
wenzelm@5819
   472
wenzelm@5819
   473
wenzelm@5819
   474
(* norm_term *)
wenzelm@5819
   475
wenzelm@5819
   476
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   477
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   478
wenzelm@8616
   479
fun unifyT ctxt (T, U) =
wenzelm@8616
   480
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@8616
   481
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) maxidx Vartab.empty (T, U)) end;
wenzelm@8616
   482
wenzelm@5819
   483
fun norm_term (ctxt as Context {binds, ...}) =
wenzelm@5819
   484
  let
wenzelm@5819
   485
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   486
    exception SAME;
wenzelm@5819
   487
wenzelm@5819
   488
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   489
          (case Vartab.lookup (binds, xi) of
wenzelm@7606
   490
            Some (Some (u, U)) =>
wenzelm@8616
   491
              let
wenzelm@8616
   492
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
wenzelm@8616
   493
                  raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u]);
wenzelm@8616
   494
                val u' = Term.subst_TVars_Vartab env u;
wenzelm@8616
   495
              in norm u' handle SAME => u' end
wenzelm@7606
   496
          | _ => raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   497
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   498
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   499
      | norm (f $ t) =
wenzelm@5819
   500
          ((case norm f of
wenzelm@5819
   501
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   502
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   503
      | norm _ =  raise SAME
wenzelm@5819
   504
    and normh t = norm t handle SAME => t
wenzelm@5819
   505
  in normh end;
wenzelm@5819
   506
wenzelm@5819
   507
wenzelm@6550
   508
(* dummy patterns *)
wenzelm@6550
   509
wenzelm@6762
   510
local
wenzelm@6762
   511
wenzelm@6560
   512
fun is_dummy (Const (c, _)) = c = PureThy.dummy_patternN
wenzelm@6550
   513
  | is_dummy _ = false;
wenzelm@6550
   514
wenzelm@6762
   515
fun prep_dummy (i, t) =
wenzelm@6762
   516
  if is_dummy t then (i + 1, Var (("_dummy_", i), Term.fastype_of t)) else (i, t);
wenzelm@6762
   517
wenzelm@6762
   518
in
wenzelm@6762
   519
wenzelm@6762
   520
fun prepare_dummies tm = #2 (Term.foldl_map_aterms prep_dummy (1, tm));
wenzelm@6762
   521
wenzelm@6550
   522
fun reject_dummies ctxt tm =
wenzelm@6550
   523
  if foldl_aterms (fn (ok, t) => ok andalso not (is_dummy t)) (true, tm) then tm
wenzelm@6550
   524
  else raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   525
wenzelm@6762
   526
end;
wenzelm@6550
   527
wenzelm@6550
   528
wenzelm@5819
   529
(* read terms *)
wenzelm@5819
   530
wenzelm@8616
   531
fun gen_read read app is_pat (ctxt as Context {defs = (_, _, (used, _)), ...}) s =
wenzelm@7663
   532
  (transform_error (read (sign_of ctxt) (def_type ctxt is_pat, def_sort ctxt, used)) s
wenzelm@7663
   533
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@7663
   534
    | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@9291
   535
  |> app (intern_skolem ctxt)
wenzelm@7663
   536
  |> app (if is_pat then I else norm_term ctxt)
wenzelm@7663
   537
  |> app (if is_pat then prepare_dummies else (reject_dummies ctxt));
wenzelm@5819
   538
wenzelm@5874
   539
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false;
wenzelm@8096
   540
val read_termT_pats = #1 oo gen_read (read_def_termTs false) (apfst o map) true;
wenzelm@8096
   541
wenzelm@8096
   542
fun read_term_pats T ctxt pats = read_termT_pats ctxt (map (rpair T) pats);
wenzelm@8096
   543
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   544
wenzelm@6762
   545
val read_term = gen_read (read_term_sg true) I false;
wenzelm@6762
   546
val read_prop = gen_read (read_prop_sg true) I false;
wenzelm@5819
   547
wenzelm@5819
   548
wenzelm@5819
   549
(* certify terms *)
wenzelm@5819
   550
wenzelm@8616
   551
fun gen_cert cert is_pat ctxt t = t
wenzelm@8616
   552
  |> (if is_pat then I else norm_term ctxt)
wenzelm@8616
   553
  |> (fn t' => cert (sign_of ctxt) t' handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   554
wenzelm@5819
   555
val cert_term = gen_cert cert_term_sg false;
wenzelm@5819
   556
val cert_prop = gen_cert cert_prop_sg false;
wenzelm@8096
   557
wenzelm@8096
   558
fun cert_term_pats _ = map o gen_cert cert_term_sg true;
wenzelm@8096
   559
val cert_prop_pats = map o gen_cert cert_prop_sg true;
wenzelm@5819
   560
wenzelm@5819
   561
wenzelm@5819
   562
(* declare terms *)
wenzelm@5819
   563
wenzelm@5819
   564
val ins_types = foldl_aterms
wenzelm@5819
   565
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   566
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   567
    | (types, _) => types);
wenzelm@5819
   568
wenzelm@5819
   569
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   570
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   571
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   572
    | (sorts, _) => sorts));
wenzelm@5819
   573
wenzelm@8616
   574
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@8616
   575
  (fn ((used, tab), TFree (x, _)) => (x ins used, Symtab.update_multi ((x, t), tab))
wenzelm@5819
   576
    | (used, _) => used));
wenzelm@5819
   577
wenzelm@7663
   578
fun ins_skolem def_ty = foldr
wenzelm@5994
   579
  (fn ((x, x'), types) =>
wenzelm@7663
   580
    (case def_ty x' of
wenzelm@5994
   581
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   582
    | None => types));
wenzelm@5994
   583
wenzelm@8373
   584
fun map_defaults f = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   585
  (thy, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   586
wenzelm@5994
   587
fun declare (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@5819
   588
  ctxt
wenzelm@7670
   589
  |> map_defaults (fn (types, sorts, used) => (ins_types (types, t), sorts, used))
wenzelm@7670
   590
  |> map_defaults (fn (types, sorts, used) => (types, ins_sorts (sorts, t), used))
wenzelm@7670
   591
  |> map_defaults (fn (types, sorts, used) => (types, sorts, ins_used (used, t)))
wenzelm@7670
   592
  |> map_defaults (fn (types, sorts, used) =>
wenzelm@7670
   593
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, used));
wenzelm@5819
   594
wenzelm@5819
   595
wenzelm@5819
   596
fun declare_term t ctxt = declare (ctxt, t);
wenzelm@5819
   597
fun declare_terms ts ctxt = foldl declare (ctxt, ts);
wenzelm@5819
   598
wenzelm@5819
   599
wenzelm@8616
   600
wenzelm@8616
   601
(** Hindley-Milner polymorphism **)
wenzelm@8616
   602
wenzelm@7925
   603
(* warn_extra_tfrees *)
wenzelm@7925
   604
wenzelm@8616
   605
local
wenzelm@8616
   606
wenzelm@8616
   607
fun used_free (a, ts) =
wenzelm@8616
   608
  (case mapfilter (fn Free (x, _) => Some x | _ => None) ts of
wenzelm@8616
   609
    [] => None
wenzelm@8616
   610
  | xs => Some (a, xs));
wenzelm@8616
   611
wenzelm@8616
   612
fun warn_extra (names1: string list, tab1) (names2, tab2) =
wenzelm@8616
   613
  if names1 = names2 then ()
wenzelm@7925
   614
  else
wenzelm@8616
   615
    let
wenzelm@8616
   616
      val extra =
wenzelm@8616
   617
        Library.gen_rems Library.eq_fst (Symtab.dest tab2, Symtab.dest tab1)
wenzelm@8616
   618
        |> mapfilter used_free;
wenzelm@8616
   619
      val tfrees = map #1 extra;
wenzelm@8616
   620
      val frees = Library.sort_strings (Library.distinct (flat (map #2 extra)));
wenzelm@8616
   621
    in
wenzelm@8616
   622
      if null extra then ()
wenzelm@8616
   623
      else warning ("Danger! Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@8616
   624
          space_implode " or " frees)
wenzelm@8616
   625
    end;
wenzelm@8616
   626
wenzelm@8616
   627
in
wenzelm@7925
   628
wenzelm@7925
   629
fun warn_extra_tfrees (ctxt1 as Context {defs = (_, _, used1), ...})
wenzelm@7925
   630
    (ctxt2 as Context {defs = (_, _, used2), ...}) = (warn_extra used1 used2; ctxt2);
wenzelm@7925
   631
wenzelm@8616
   632
end;
wenzelm@8616
   633
wenzelm@8616
   634
wenzelm@8616
   635
(* generalize type variables *)
wenzelm@8616
   636
wenzelm@8616
   637
fun gen_tfrees inner opt_outer =
wenzelm@8616
   638
  let
wenzelm@8616
   639
    val inner_used = used_table inner;
wenzelm@8616
   640
    val inner_fixes = fixed_names inner;
wenzelm@8616
   641
    val (outer_used, outer_fixes) =
wenzelm@8616
   642
      (case opt_outer of
wenzelm@8616
   643
        None => (Symtab.empty, [])
wenzelm@8616
   644
      | Some ctxt => (used_table ctxt, fixed_names ctxt));
wenzelm@8616
   645
wenzelm@8616
   646
    val extra_fixes = inner_fixes \\ outer_fixes;
wenzelm@8616
   647
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   648
      | still_fixed _ = false;
wenzelm@8616
   649
wenzelm@8616
   650
    fun add (gen, (a, xs)) =
wenzelm@8616
   651
      if is_some (Symtab.lookup (outer_used, a)) orelse exists still_fixed xs
wenzelm@8616
   652
      then gen else a :: gen;
wenzelm@8616
   653
  in Symtab.foldl add ([], inner_used) end;
wenzelm@8616
   654
wenzelm@8616
   655
fun generalizeT inner outer =
wenzelm@8616
   656
  let
wenzelm@8616
   657
    val tfrees = gen_tfrees inner (Some outer);
wenzelm@8616
   658
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@8616
   659
  in Term.map_type_tfree gen end;
wenzelm@8616
   660
wenzelm@8616
   661
val generalize = Term.map_term_types oo generalizeT;
wenzelm@8616
   662
wenzelm@8616
   663
wenzelm@8616
   664
(* export theorems *)
wenzelm@8616
   665
wenzelm@8616
   666
fun get_free x (None, t as Free (y, _)) = if x = y then Some t else None
wenzelm@8616
   667
  | get_free _ (opt, _) = opt;
wenzelm@8616
   668
wenzelm@8616
   669
fun find_free t x = foldl_aterms (get_free x) (None, t);
wenzelm@8616
   670
wenzelm@8616
   671
wenzelm@8616
   672
local
wenzelm@8616
   673
wenzelm@9470
   674
fun export tfrees fixes goal_asms thm =
wenzelm@9470
   675
  thm
wenzelm@9470
   676
  |> Drule.forall_elim_vars 0
wenzelm@9470
   677
  |> Seq.EVERY (rev (map op |> goal_asms))
wenzelm@9470
   678
  |> Seq.map (fn rule =>
wenzelm@9470
   679
    let
wenzelm@9470
   680
      val {sign, prop, maxidx, ...} = Thm.rep_thm rule;
wenzelm@9470
   681
      val frees = map (Thm.cterm_of sign) (mapfilter (find_free prop) fixes);
wenzelm@9470
   682
    in
wenzelm@9470
   683
      rule
wenzelm@9470
   684
      |> Drule.forall_intr_list frees
wenzelm@8616
   685
      |> Drule.forall_elim_vars 0
wenzelm@9470
   686
      |> Drule.tvars_intr_list tfrees
wenzelm@9470
   687
    end);
wenzelm@8616
   688
wenzelm@8616
   689
fun diff_context inner None = (gen_tfrees inner None, fixed_names inner, assumptions inner)
wenzelm@8616
   690
  | diff_context inner (Some outer) =
wenzelm@8616
   691
      (gen_tfrees inner (Some outer),
wenzelm@8616
   692
        fixed_names inner \\ fixed_names outer,
wenzelm@8616
   693
        Library.drop (length (assumptions outer), assumptions inner));
wenzelm@8616
   694
wenzelm@8616
   695
in
wenzelm@8616
   696
wenzelm@9470
   697
fun export_wrt is_goal inner opt_outer =
wenzelm@8616
   698
  let
wenzelm@8616
   699
    val (tfrees, fixes, asms) = diff_context inner opt_outer;
wenzelm@9470
   700
    val goal_asms = map (fn (cprops, (exp, _)) => (map Drule.mk_cgoal cprops, exp)) asms;
wenzelm@9470
   701
    val tacs = flat (map (fn (cprops, (_, f)) => f is_goal (length cprops)) asms);
wenzelm@9470
   702
  in (export tfrees fixes goal_asms, tacs) end;
wenzelm@8616
   703
wenzelm@8616
   704
end;
wenzelm@8616
   705
wenzelm@7925
   706
wenzelm@5819
   707
wenzelm@5819
   708
(** bindings **)
wenzelm@5819
   709
wenzelm@5819
   710
(* update_binds *)
wenzelm@5819
   711
wenzelm@7606
   712
fun del_bind (ctxt, xi) =
wenzelm@7606
   713
  ctxt
wenzelm@8373
   714
  |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   715
      (thy, data, asms, Vartab.update ((xi, None), binds), thms, cases, defs));
wenzelm@7606
   716
wenzelm@8616
   717
fun upd_bind (ctxt, ((x, i), t)) =
wenzelm@8616
   718
  let
wenzelm@8616
   719
    val T = Term.fastype_of t;
wenzelm@8616
   720
    val t' =
wenzelm@8616
   721
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   722
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   723
  in
wenzelm@5819
   724
    ctxt
wenzelm@8616
   725
    |> declare_term t'
wenzelm@8373
   726
    |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8616
   727
        (thy, data, asms, Vartab.update (((x, i), Some (t', T)), binds), thms, cases, defs))
wenzelm@5819
   728
  end;
wenzelm@5819
   729
wenzelm@7606
   730
fun del_upd_bind (ctxt, (xi, None)) = del_bind (ctxt, xi)
wenzelm@7606
   731
  | del_upd_bind (ctxt, (xi, Some t)) = upd_bind (ctxt, (xi, t));
wenzelm@7606
   732
wenzelm@5819
   733
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@7606
   734
fun delete_update_binds bs ctxt = foldl del_upd_bind (ctxt, bs);
wenzelm@7606
   735
wenzelm@5819
   736
wenzelm@8096
   737
(* simult_matches *)
wenzelm@8096
   738
wenzelm@8616
   739
fun simult_matches ctxt [] = []
wenzelm@8616
   740
  | simult_matches ctxt pairs =
wenzelm@8096
   741
      let
wenzelm@8096
   742
        val maxidx = foldl (fn (i, (t1, t2)) =>
wenzelm@8096
   743
          Int.max (i, Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2))) (~1, pairs);
wenzelm@8096
   744
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx, pairs);
wenzelm@8096
   745
        val env =
wenzelm@8096
   746
          (case Seq.pull envs of
wenzelm@8096
   747
            None => raise CONTEXT ("Pattern match failed!", ctxt)      (* FIXME improve msg (!?) *)
wenzelm@8096
   748
          | Some (env, _) => env);
wenzelm@8616
   749
        val binds =
wenzelm@8616
   750
          (*Note: Envir.norm_term ensures proper type instantiation*)
wenzelm@8616
   751
          map (apsnd (Envir.norm_term env)) (Envir.alist_of env);
wenzelm@8616
   752
      in binds end;
wenzelm@8096
   753
wenzelm@8096
   754
wenzelm@8096
   755
(* add_binds(_i) *)
wenzelm@5819
   756
wenzelm@7925
   757
local
wenzelm@7925
   758
wenzelm@5819
   759
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@7606
   760
  ctxt |> delete_update_binds [(xi, apsome (prep ctxt) raw_t)];
wenzelm@5819
   761
wenzelm@8616
   762
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@7925
   763
wenzelm@7925
   764
in
wenzelm@5819
   765
wenzelm@5819
   766
val add_binds = gen_binds read_term;
wenzelm@5819
   767
val add_binds_i = gen_binds cert_term;
wenzelm@8616
   768
wenzelm@7925
   769
val auto_bind_goal = add_binds_i o AutoBind.goal;
wenzelm@7925
   770
val auto_bind_facts = add_binds_i oo AutoBind.facts;
wenzelm@7925
   771
wenzelm@7925
   772
end;
wenzelm@5819
   773
wenzelm@5819
   774
wenzelm@8096
   775
(* match_bind(_i) *)
wenzelm@5819
   776
wenzelm@8096
   777
local
wenzelm@8096
   778
wenzelm@8616
   779
fun prep_bind (prep, prep_pats) (ctxt, (raw_pats, raw_t)) =
wenzelm@5819
   780
  let
wenzelm@5935
   781
    val t = prep ctxt raw_t;
wenzelm@8096
   782
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   783
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   784
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   785
  in (ctxt', binds) end;
wenzelm@7670
   786
wenzelm@8616
   787
fun gen_binds prepp gen raw_binds ctxt =
wenzelm@8616
   788
  let
wenzelm@8616
   789
    val (ctxt', binds) = apsnd flat (foldl_map (prep_bind prepp) (ctxt, raw_binds));
wenzelm@8616
   790
    val binds' =
wenzelm@8616
   791
      if gen then map (apsnd (generalize ctxt' ctxt)) binds
wenzelm@8616
   792
      else binds;
wenzelm@8616
   793
    val binds'' = map (apsnd Some) binds';
wenzelm@8616
   794
  in
wenzelm@8616
   795
    warn_extra_tfrees ctxt
wenzelm@8616
   796
     (if gen then ctxt (*sic!*) |> declare_terms (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   797
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   798
  end;
wenzelm@8096
   799
wenzelm@8096
   800
in
wenzelm@5935
   801
wenzelm@8096
   802
val match_bind = gen_binds (read_term, read_term_pats);
wenzelm@8096
   803
val match_bind_i = gen_binds (cert_term, cert_term_pats);
wenzelm@8096
   804
wenzelm@8096
   805
end;
wenzelm@5935
   806
wenzelm@5935
   807
wenzelm@8096
   808
(* proposition patterns *)
wenzelm@5935
   809
wenzelm@8096
   810
fun prep_propp prep_prop prep_pats (ctxt, (raw_prop, (raw_pats1, raw_pats2))) =
wenzelm@6931
   811
  let
wenzelm@8096
   812
    val prop = prep_prop ctxt raw_prop;
wenzelm@8096
   813
    val ctxt' = declare_term prop ctxt;
wenzelm@8096
   814
wenzelm@8096
   815
    val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@8096
   816
    val len1 = length raw_pats1;
wenzelm@8096
   817
  in (ctxt', (prop, (take (len1, pats), drop (len1, pats)))) end;
wenzelm@8096
   818
wenzelm@8096
   819
val read_propp = prep_propp read_prop read_prop_pats;
wenzelm@8096
   820
val cert_propp = prep_propp cert_prop cert_prop_pats;
wenzelm@5935
   821
wenzelm@8096
   822
wenzelm@8096
   823
fun gen_bind_propp prepp (ctxt, propp) =
wenzelm@8096
   824
  let
wenzelm@8096
   825
    val (ctxt', (prop, (pats1, pats2))) = prepp (ctxt, propp);
wenzelm@8616
   826
    val pairs =
wenzelm@8616
   827
      map (rpair prop) pats1 @
wenzelm@8616
   828
      map (rpair (Logic.strip_imp_concl prop)) pats2;   (* FIXME handle params!? *)
wenzelm@8616
   829
    val binds = simult_matches ctxt' pairs;
wenzelm@8616
   830
wenzelm@8616
   831
    (*note: context evaluated now, binds added later (lazy)*)
wenzelm@8616
   832
    val gen = generalize ctxt' ctxt;
wenzelm@8616
   833
    fun gen_binds ct = ct |> add_binds_i (map (apsnd (Some o gen)) binds);
wenzelm@8616
   834
  in (ctxt' |> add_binds_i (map (apsnd Some) binds), (prop, gen_binds)) end;
wenzelm@8096
   835
wenzelm@8096
   836
val bind_propp = gen_bind_propp read_propp;
wenzelm@8096
   837
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@6789
   838
wenzelm@6789
   839
wenzelm@5819
   840
wenzelm@5819
   841
(** theorems **)
wenzelm@5819
   842
wenzelm@6091
   843
(* get_thm(s) *)
wenzelm@5819
   844
wenzelm@6091
   845
fun get_thm (ctxt as Context {thy, thms, ...}) name =
wenzelm@5819
   846
  (case Symtab.lookup (thms, name) of
wenzelm@9007
   847
    Some (Some [th]) => Thm.transfer thy th
wenzelm@7606
   848
  | Some (Some _) => raise CONTEXT ("Single theorem expected: " ^ quote name, ctxt)
wenzelm@7606
   849
  | _ => (PureThy.get_thm thy name handle THEORY (msg, _) => raise CONTEXT (msg, ctxt)));
wenzelm@5819
   850
wenzelm@6091
   851
fun get_thms (ctxt as Context {thy, thms, ...}) name =
wenzelm@5819
   852
  (case Symtab.lookup (thms, name) of
wenzelm@9007
   853
    Some (Some ths) => map (Thm.transfer thy) ths
wenzelm@7606
   854
  | _ => (PureThy.get_thms thy name handle THEORY (msg, _) => raise CONTEXT (msg, ctxt)));
wenzelm@5819
   855
wenzelm@6091
   856
fun get_thmss ctxt names = flat (map (get_thms ctxt) names);
wenzelm@5819
   857
wenzelm@5819
   858
wenzelm@6091
   859
(* put_thm(s) *)
wenzelm@5819
   860
wenzelm@7479
   861
fun put_thms ("", _) = I
wenzelm@7479
   862
  | put_thms (name, ths) = map_context
wenzelm@8373
   863
      (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   864
        (thy, data, asms, binds, Symtab.update ((name, Some ths), thms), cases, defs));
wenzelm@5819
   865
wenzelm@6091
   866
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   867
wenzelm@6091
   868
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   869
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   870
wenzelm@5819
   871
wenzelm@7606
   872
(* reset_thms *)
wenzelm@7606
   873
wenzelm@8373
   874
fun reset_thms name = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   875
  (thy, data, asms, binds, Symtab.update ((name, None), thms), cases, defs));
wenzelm@7606
   876
wenzelm@7606
   877
wenzelm@6091
   878
(* have_thmss *)
wenzelm@5819
   879
wenzelm@9196
   880
fun have_thss (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
   881
  let
wenzelm@5819
   882
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   883
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   884
      in (ct', th' :: ths) end
wenzelm@5819
   885
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@9196
   886
    val thms = flat (rev rev_thms);
wenzelm@6091
   887
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   888
wenzelm@9196
   889
fun have_thmss args ctxt = foldl_map have_thss (ctxt, args);
wenzelm@9196
   890
wenzelm@5819
   891
wenzelm@5819
   892
wenzelm@5819
   893
(** assumptions **)
wenzelm@5819
   894
wenzelm@5819
   895
(* assume *)
wenzelm@5819
   896
wenzelm@7270
   897
local
wenzelm@6797
   898
wenzelm@9470
   899
fun gen_assm prepp (ctxt, (name, attrs, raw_prop_pats)) =
wenzelm@5819
   900
  let
wenzelm@8096
   901
    val (ctxt', props) = foldl_map prepp (ctxt, raw_prop_pats);
wenzelm@5819
   902
wenzelm@7575
   903
    val cprops = map (Thm.cterm_of (sign_of ctxt')) props;
wenzelm@8616
   904
    val asms = map (Drule.forall_elim_vars 0 o Drule.assume_goal) cprops;
wenzelm@5919
   905
wenzelm@5919
   906
    val ths = map (fn th => ([th], [])) asms;
wenzelm@9196
   907
    val (ctxt'', [(_, thms)]) =
wenzelm@5819
   908
      ctxt'
wenzelm@6797
   909
      |> auto_bind_facts name props
wenzelm@9196
   910
      |> have_thmss [((name, attrs @ [Drule.tag_assumption]), ths)];
wenzelm@9470
   911
  in (ctxt'', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
   912
wenzelm@9470
   913
fun gen_assms prepp exp args ctxt =
wenzelm@9470
   914
  let
wenzelm@9470
   915
    val (ctxt', results) = foldl_map (gen_assm prepp) (ctxt, args);
wenzelm@9470
   916
    val cprops = flat (map #1 results);
wenzelm@9470
   917
    val asmss = map #2 results;
wenzelm@9470
   918
    val thmss = map #3 results;
wenzelm@9470
   919
    val ctxt'' =
wenzelm@9470
   920
      ctxt'
wenzelm@8373
   921
      |> map_context (fn (thy, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@9470
   922
        (thy, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@9470
   923
          cases, defs));
wenzelm@9470
   924
  in (warn_extra_tfrees ctxt ctxt'', (thmss, prems_of ctxt'')) end;
wenzelm@5819
   925
wenzelm@7270
   926
in
wenzelm@7270
   927
wenzelm@8616
   928
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
   929
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
   930
wenzelm@7270
   931
end;
wenzelm@5819
   932
wenzelm@5819
   933
wenzelm@8096
   934
(* variables *)
wenzelm@8096
   935
wenzelm@9291
   936
fun prep_vars prep_typ (ctxt, (xs, raw_T)) =
wenzelm@8096
   937
  let
wenzelm@9325
   938
    val _ = (case filter (not o Syntax.is_identifier) (map (no_skolem false ctxt) xs) of
wenzelm@8096
   939
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
   940
wenzelm@8096
   941
    val opt_T = apsome (prep_typ ctxt) raw_T;
wenzelm@8096
   942
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@8096
   943
    val ctxt' = ctxt |> declare_terms (map (fn x => Free (x, T)) xs);
wenzelm@8096
   944
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
   945
wenzelm@9291
   946
val read_vars = prep_vars read_typ;
wenzelm@9291
   947
val cert_vars = prep_vars cert_typ;
wenzelm@8096
   948
wenzelm@8096
   949
wenzelm@5819
   950
(* fix *)
wenzelm@5819
   951
wenzelm@8096
   952
local
wenzelm@8096
   953
wenzelm@8096
   954
fun add_vars xs (fixes, names) =
wenzelm@8096
   955
  let
wenzelm@8096
   956
    val xs' = variantlist (xs, names);
wenzelm@8096
   957
    val fixes' = (xs ~~ map Syntax.skolem xs') @ fixes;
wenzelm@8096
   958
    val names' = xs' @ names;
wenzelm@8096
   959
  in (fixes', names') end;
wenzelm@8096
   960
wenzelm@8373
   961
fun map_vars f = map_context (fn (thy, data, (assumes, vars), binds, thms, cases, defs) =>
wenzelm@8373
   962
  (thy, data, (assumes, f vars), binds, thms, cases, defs));
wenzelm@5819
   963
wenzelm@8096
   964
fun gen_fix prep raw_vars ctxt =
wenzelm@8096
   965
  let
wenzelm@8096
   966
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
wenzelm@8096
   967
    val xs = flat (map fst varss);
wenzelm@8096
   968
  in
wenzelm@8096
   969
    (case Library.duplicates xs of
wenzelm@8096
   970
      [] => ()
wenzelm@8096
   971
    | dups => raise CONTEXT ("Duplicate variable name(s): " ^ commas_quote dups, ctxt));
wenzelm@8096
   972
    ctxt' |> map_vars (add_vars xs)
wenzelm@8096
   973
  end;
wenzelm@5819
   974
wenzelm@8096
   975
in
wenzelm@7679
   976
wenzelm@8096
   977
val fix = gen_fix read_vars;
wenzelm@8096
   978
val fix_i = gen_fix cert_vars;
wenzelm@8096
   979
wenzelm@8096
   980
end;
wenzelm@5819
   981
wenzelm@6895
   982
wenzelm@9291
   983
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
   984
fun bind_skolem ctxt xs =
wenzelm@9291
   985
  let
wenzelm@9291
   986
    val ctxt' = ctxt |> fix_i [(xs, None)];
wenzelm@9291
   987
    fun bind (t as Free (x, T)) =
wenzelm@9291
   988
          if x mem_string xs then
wenzelm@9291
   989
            (case get_skolem ctxt' x of Some x' => Free (x', T) | None => t)
wenzelm@9291
   990
          else t
wenzelm@9291
   991
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
   992
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
   993
      | bind a = a;
wenzelm@9291
   994
  in bind end;
wenzelm@9291
   995
wenzelm@9291
   996
wenzelm@5819
   997
wenzelm@8373
   998
(** cases **)
wenzelm@8373
   999
wenzelm@8403
  1000
fun check_case ctxt name (xs, ts) =
wenzelm@8403
  1001
  if null (foldr Term.add_typ_tvars (map snd xs, [])) andalso
wenzelm@8403
  1002
    null (foldr Term.add_term_vars (ts, [])) then ()
wenzelm@8403
  1003
  else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt);
wenzelm@8403
  1004
wenzelm@8373
  1005
fun get_case (ctxt as Context {cases, ...}) name =
wenzelm@8426
  1006
  (case assoc (cases, name) of
wenzelm@8373
  1007
    None => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
wenzelm@8403
  1008
  | Some c => (check_case ctxt name c; c));
wenzelm@8373
  1009
wenzelm@8384
  1010
wenzelm@8373
  1011
fun add_cases xs = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8426
  1012
  (thy, data, asms, binds, thms, rev (filter_out (equal "" o #1) xs) @ cases, defs));
wenzelm@8373
  1013
wenzelm@8373
  1014
wenzelm@8373
  1015
wenzelm@5819
  1016
(** theory setup **)
wenzelm@5819
  1017
wenzelm@5819
  1018
val setup = [ProofDataData.init];
wenzelm@5819
  1019
wenzelm@5819
  1020
wenzelm@5819
  1021
end;