src/Pure/Isar/proof_context.ML
author wenzelm
Thu Jul 08 18:32:43 1999 +0200 (1999-07-08)
changeset 6931 bd8aa6ae6bcd
parent 6895 450b1f67f099
child 6985 2af6405a6ef3
permissions -rw-r--r--
propp: 'concl' patterns;
assumptions: tactics for non-goal export;
use Display.pretty_thm_no_hyps;
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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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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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  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 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 strings_of_context: context -> string list
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  val print_proof_data: theory -> unit
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  val init: theory -> context
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  val read_typ: context -> string -> typ
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  val cert_typ: context -> typ -> typ
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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_term_pat: context -> string -> term
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  val read_prop_pat: context -> string -> term
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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 declare_term: term -> context -> context
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  val declare_terms: term list -> context -> context
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  val declare_thm: thm -> context -> context
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  val add_binds: (indexname * string) list -> context -> context
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  val add_binds_i: (indexname * term) list -> context -> context
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  val match_binds: (string list * string) list -> context -> context
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  val match_binds_i: (term list * term) list -> context -> context
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  val bind_propp: context * (string * (string list * string list)) -> context * term
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  val bind_propp_i: context * (term * (term list * term list)) -> context * term
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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 thms_closure: context -> xstring -> thm list option
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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 have_thmss: thm list -> string -> context attribute list
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    -> (thm list * context attribute list) list -> context -> context * (string * thm list)
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  val assumptions: context -> (cterm * ((int -> tactic) * (int -> tactic))) list
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  val fixed_names: context -> string list
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  val assume: ((int -> tactic) * (int -> tactic)) -> string -> context attribute list
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    -> (string * (string list * string list)) list
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    -> context -> context * ((string * thm list) * thm list)
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  val assume_i: ((int -> tactic) * (int -> tactic)) -> string -> context attribute list
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    -> (term * (term list * term list)) list
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    -> context -> context * ((string * thm list) * thm list)
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  val fix: (string * string option) list -> context -> context
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  val fix_i: (string * typ) list -> context -> context
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  val transfer_used_names: context -> context -> context
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  val setup: (theory -> theory) list
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end;
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signature PROOF_CONTEXT_PRIVATE =
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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: PROOF_CONTEXT_PRIVATE =
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struct
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(** datatype context **)
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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 * ((int -> tactic) * (int -> tactic))) 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) Vartab.table,                                   (*term bindings*)
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    thms: thm list Symtab.table,                                        (*local thms*)
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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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      int *                                                             (*maxidx*)
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      string list};                                                     (*used type var names*)
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exception CONTEXT of string * context;
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fun make_context (thy, data, asms, binds, thms, defs) =
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  Context {thy = thy, data = data, asms = asms, binds = binds, thms = thms, defs = defs};
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fun map_context f (Context {thy, data, asms, binds, thms, defs}) =
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  make_context (f (thy, data, asms, binds, thms, 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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(** print context information **)
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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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val verb_string = verb (Library.single o Pretty.string_of);
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fun strings_of_items prt name items =
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  let
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    fun pretty_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
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      | pretty_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.string_of (Pretty.big_list name (map pretty_itms items))]
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  end;
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(* term bindings *)
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fun strings_of_binds (Context {thy, binds, ...}) =
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  let
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    val prt_term = Sign.pretty_term (Theory.sign_of thy);
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    fun fix_var (x, i) =
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      (case try Syntax.dest_binding x of
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        None => Syntax.string_of_vname (x, i)
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      | Some x' => if i = 0 then "??" ^ x' else Syntax.string_of_vname (x, i));
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    fun pretty_bind (xi, (t, T)) = Pretty.block
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      [Pretty.str (fix_var xi), Pretty.str " ==", Pretty.brk 1, prt_term t];
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  in
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    if Vartab.is_empty binds andalso not (! verbose) then []
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    else [Pretty.string_of (Pretty.big_list "Term bindings:" (map pretty_bind (Vartab.dest binds)))]
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  end;
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val print_binds = seq writeln o strings_of_binds;
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(* local theorems *)
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fun strings_of_thms (Context {thms, ...}) =
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  strings_of_items Display.pretty_thm_no_hyps "Local theorems:" (Symtab.dest thms);
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val print_thms = seq writeln o strings_of_thms;
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(* main context *)
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fun strings_of_context (ctxt as Context {thy, data = _, asms = ((_, prems), (fixes, _)), binds = _,
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    thms = _, defs = (types, sorts, maxidx, used)}) =
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  let
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    val sign = Theory.sign_of thy;
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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.str (x ^ " = " ^ x');
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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_string pretty_thy @
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    (if null fixes andalso not (! verbose) then []
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     else [Pretty.string_of (Pretty.big_list "Fixed variables:" (map prt_fix (rev fixes)))]) @
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    strings_of_items (prt_term o #prop o Thm.rep_thm) "Assumptions:" prems @
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    verb strings_of_binds ctxt @
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    verb strings_of_thms ctxt @
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    verb_string (Pretty.big_list "Type constraints:" (map prt_defT (Vartab.dest types))) @
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    verb_string (Pretty.big_list "Default sorts:" (map prt_defS (Vartab.dest sorts))) @
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    verb_string (Pretty.str ("Maxidx: " ^ string_of_int maxidx)) @
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    verb_string (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)
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        else err_access ctxt name
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    | None => err_uninit ctxt name)
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  end;
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fun get_data kind f ctxt =
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  let val (x, _) = lookup_data ctxt kind
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  in f x handle Match => Object.kind_error kind end;
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fun print_data kind ctxt =
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  let val (x, (_, prt)) = lookup_data ctxt kind
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  in prt ctxt x end;
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fun put_data kind f x ctxt =
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  (lookup_data ctxt kind;
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    ctxt |> map_context (fn (thy, data, asms, binds, thms, defs) =>
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      (thy, Symtab.update ((Object.name_of_kind kind, f x), data), asms, binds, thms, defs)));
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(* init context *)
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fun init thy =
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  let val data = Symtab.map (fn (_, (f, _)) => f thy) (ProofDataData.get thy) in
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    make_context (thy, data, (([], []), ([], [])), Vartab.empty, Symtab.empty,
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      (Vartab.empty, Vartab.empty, ~1, []))
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  end;
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(** prepare types **)
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fun read_typ (ctxt as Context {defs = (_, sorts, _, _), ...}) s =
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  let
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    val sign = sign_of ctxt;
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    fun def_sort xi = Vartab.lookup (sorts, xi);
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  in
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    transform_error (Sign.read_typ (sign, def_sort)) s
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      handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt)
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  end;
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fun cert_typ ctxt raw_T =
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  Sign.certify_typ (sign_of ctxt) raw_T
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    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
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(** prepare terms and propositions **)
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(*
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  (1) read / certify wrt. signature of context
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  (2) intern Skolem constants
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  (3) expand term bindings
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*)
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(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
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fun read_def_termTs freeze sg (types, sorts, used) sTs =
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  let val (cts, env) = Thm.read_def_cterms (sg, types, sorts) used freeze sTs
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  in (map Thm.term_of cts, env) end;
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fun read_def_termT freeze sg defs sT = apfst hd (read_def_termTs freeze sg defs [sT]);
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fun read_term_sg freeze sg (defs as (_, _, used)) s =
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  #1 (read_def_termT freeze sg defs (s, TVar ((variant used "'z", 0), logicS)));
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fun read_prop_sg freeze sg defs s =
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  #1 (read_def_termT freeze sg defs (s, propT));
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fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   335
wenzelm@5819
   336
fun cert_prop_sg sg tm =
wenzelm@5819
   337
  let
wenzelm@5819
   338
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   339
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@5819
   340
  in
wenzelm@5819
   341
    if T = propT then t
wenzelm@5819
   342
    else raise TERM ("Term not of type prop", [t])
wenzelm@5819
   343
  end;
wenzelm@5819
   344
wenzelm@5819
   345
wenzelm@5819
   346
(* intern_skolem *)
wenzelm@5819
   347
wenzelm@5819
   348
fun get_skolem (Context {asms = (_, (fixes, _)), ...}) x = assoc (fixes, x);
wenzelm@5819
   349
wenzelm@5819
   350
fun check_skolem ctxt check x =
wenzelm@5819
   351
  if check andalso can Syntax.dest_skolem x then
wenzelm@5819
   352
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@5819
   353
  else x;
wenzelm@5819
   354
wenzelm@5819
   355
fun intern_skolem ctxt check =
wenzelm@5819
   356
  let
wenzelm@5819
   357
    fun intern (t as Free (x, T)) =
wenzelm@5819
   358
          (case get_skolem ctxt (check_skolem ctxt check x) of
wenzelm@5819
   359
            Some x' => Free (x', T)
wenzelm@5819
   360
          | None => t)
wenzelm@5819
   361
      | intern (t $ u) = intern t $ intern u
wenzelm@5819
   362
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@5819
   363
      | intern a = a;
wenzelm@5819
   364
  in intern end;
wenzelm@5819
   365
wenzelm@5819
   366
wenzelm@5819
   367
(* norm_term *)
wenzelm@5819
   368
wenzelm@5819
   369
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   370
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   371
wenzelm@5819
   372
fun norm_term (ctxt as Context {binds, ...}) =
wenzelm@5819
   373
  let
wenzelm@5819
   374
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   375
    exception SAME;
wenzelm@5819
   376
wenzelm@5819
   377
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   378
          (case Vartab.lookup (binds, xi) of
wenzelm@5819
   379
            Some (u, U) =>
wenzelm@5819
   380
              if T = U then (norm u handle SAME => u)
wenzelm@5819
   381
              else raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u])
wenzelm@5819
   382
          | None =>
wenzelm@5819
   383
              if can Syntax.dest_binding (#1 xi) then
wenzelm@5819
   384
                raise CONTEXT ("Unbound binding: " ^ Syntax.string_of_vname xi, ctxt)
wenzelm@5819
   385
              else raise SAME)
wenzelm@5819
   386
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   387
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   388
      | norm (f $ t) =
wenzelm@5819
   389
          ((case norm f of
wenzelm@5819
   390
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   391
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   392
      | norm _ =  raise SAME
wenzelm@5819
   393
    and normh t = norm t handle SAME => t
wenzelm@5819
   394
  in normh end;
wenzelm@5819
   395
wenzelm@5819
   396
wenzelm@6550
   397
(* dummy patterns *)
wenzelm@6550
   398
wenzelm@6762
   399
local
wenzelm@6762
   400
wenzelm@6560
   401
fun is_dummy (Const (c, _)) = c = PureThy.dummy_patternN
wenzelm@6550
   402
  | is_dummy _ = false;
wenzelm@6550
   403
wenzelm@6762
   404
fun prep_dummy (i, t) =
wenzelm@6762
   405
  if is_dummy t then (i + 1, Var (("_dummy_", i), Term.fastype_of t)) else (i, t);
wenzelm@6762
   406
wenzelm@6762
   407
in
wenzelm@6762
   408
wenzelm@6762
   409
fun prepare_dummies tm = #2 (Term.foldl_map_aterms prep_dummy (1, tm));
wenzelm@6762
   410
wenzelm@6550
   411
fun reject_dummies ctxt tm =
wenzelm@6550
   412
  if foldl_aterms (fn (ok, t) => ok andalso not (is_dummy t)) (true, tm) then tm
wenzelm@6550
   413
  else raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   414
wenzelm@6762
   415
end;
wenzelm@6550
   416
wenzelm@6550
   417
wenzelm@5819
   418
(* read terms *)
wenzelm@5819
   419
wenzelm@5874
   420
fun gen_read read app is_pat (ctxt as Context {binds, defs = (types, sorts, _, used), ...}) s =
wenzelm@5819
   421
  let
wenzelm@5819
   422
    val sign = sign_of ctxt;
wenzelm@5819
   423
wenzelm@5819
   424
    fun def_type xi =
wenzelm@5819
   425
      (case Vartab.lookup (types, xi) of
wenzelm@5819
   426
        None => if is_pat then None else apsome #2 (Vartab.lookup (binds, xi))
wenzelm@5819
   427
      | some => some);
wenzelm@5819
   428
wenzelm@5819
   429
    fun def_sort xi = Vartab.lookup (sorts, xi);
wenzelm@5819
   430
  in
wenzelm@5819
   431
    (transform_error (read sign (def_type, def_sort, used)) s
wenzelm@5819
   432
      handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@5819
   433
      | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@5874
   434
    |> app (intern_skolem ctxt true)
wenzelm@5874
   435
    |> app (if is_pat then I else norm_term ctxt)
wenzelm@6550
   436
    |> app (if is_pat then prepare_dummies else (reject_dummies ctxt))
wenzelm@5819
   437
  end;
wenzelm@5819
   438
wenzelm@5874
   439
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false;
wenzelm@6762
   440
val read_term = gen_read (read_term_sg true) I false;
wenzelm@6762
   441
val read_prop = gen_read (read_prop_sg true) I false;
wenzelm@6762
   442
val read_term_pat = gen_read (read_term_sg false) I true;
wenzelm@6762
   443
val read_prop_pat = gen_read (read_prop_sg false) I true;
wenzelm@5819
   444
wenzelm@5819
   445
wenzelm@5819
   446
(* certify terms *)
wenzelm@5819
   447
wenzelm@5819
   448
fun gen_cert cert is_pat ctxt t =
wenzelm@5819
   449
  (cert (sign_of ctxt) t handle TERM (msg, _) => raise CONTEXT (msg, ctxt))
wenzelm@5819
   450
  |> intern_skolem ctxt false
wenzelm@5819
   451
  |> (if is_pat then I else norm_term ctxt);
wenzelm@5819
   452
wenzelm@5819
   453
val cert_term = gen_cert cert_term_sg false;
wenzelm@5819
   454
val cert_prop = gen_cert cert_prop_sg false;
wenzelm@5935
   455
val cert_term_pat = gen_cert cert_term_sg true;
wenzelm@5935
   456
val cert_prop_pat = gen_cert cert_prop_sg true;
wenzelm@5819
   457
wenzelm@5819
   458
wenzelm@5819
   459
(* declare terms *)
wenzelm@5819
   460
wenzelm@5819
   461
val ins_types = foldl_aterms
wenzelm@5819
   462
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   463
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   464
    | (types, _) => types);
wenzelm@5819
   465
wenzelm@5819
   466
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   467
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   468
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   469
    | (sorts, _) => sorts));
wenzelm@5819
   470
wenzelm@5819
   471
val ins_used = foldl_types (foldl_atyps
wenzelm@5819
   472
  (fn (used, TFree (x, _)) => x ins used
wenzelm@5819
   473
    | (used, TVar ((x, _), _)) => x ins used
wenzelm@5819
   474
    | (used, _) => used));
wenzelm@5819
   475
wenzelm@5994
   476
fun ins_skolem def_type = foldr
wenzelm@5994
   477
  (fn ((x, x'), types) =>
wenzelm@5994
   478
    (case def_type x' of
wenzelm@5994
   479
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   480
    | None => types));
wenzelm@5994
   481
wenzelm@5819
   482
fun map_defaults f = map_context
wenzelm@5819
   483
  (fn (thy, data, asms, binds, thms, defs) => (thy, data, asms, binds, thms, f defs));
wenzelm@5819
   484
wenzelm@5994
   485
fun declare (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@5819
   486
  ctxt
wenzelm@5819
   487
  |> map_defaults (fn (types, sorts, maxidx, used) => (ins_types (types, t), sorts, maxidx, used))
wenzelm@5819
   488
  |> map_defaults (fn (types, sorts, maxidx, used) => (types, ins_sorts (sorts, t), maxidx, used))
wenzelm@5819
   489
  |> map_defaults (fn (types, sorts, maxidx, used) => (types, sorts, maxidx, ins_used (used, t)))
wenzelm@5819
   490
  |> map_defaults (fn (types, sorts, maxidx, used) =>
wenzelm@5994
   491
      (types, sorts, Int.max (maxidx, Term.maxidx_of_term t), used))
wenzelm@5994
   492
  |> map_defaults (fn (types, sorts, maxidx, used) =>
wenzelm@5994
   493
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, maxidx, used));
wenzelm@5819
   494
wenzelm@5819
   495
wenzelm@5819
   496
fun declare_term t ctxt = declare (ctxt, t);
wenzelm@5819
   497
fun declare_terms ts ctxt = foldl declare (ctxt, ts);
wenzelm@5819
   498
wenzelm@5874
   499
fun declare_thm thm ctxt =
wenzelm@5874
   500
  let val {prop, hyps, ...} = Thm.rep_thm thm
wenzelm@5874
   501
  in ctxt |> declare_terms (prop :: hyps) end;
wenzelm@5874
   502
wenzelm@5819
   503
wenzelm@5819
   504
wenzelm@5819
   505
(** bindings **)
wenzelm@5819
   506
wenzelm@5819
   507
(* update_binds *)
wenzelm@5819
   508
wenzelm@5819
   509
fun upd_bind (ctxt, (xi, t)) =
wenzelm@5819
   510
  let val T = fastype_of t in
wenzelm@5819
   511
    ctxt
wenzelm@5819
   512
    |> declare_term t
wenzelm@5819
   513
    |> map_context (fn (thy, data, asms, binds, thms, defs) =>
wenzelm@5819
   514
        (thy, data, asms, Vartab.update ((xi, (t, T)), binds), thms, defs))
wenzelm@5819
   515
  end;
wenzelm@5819
   516
wenzelm@5819
   517
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@5819
   518
fun update_binds_env env = update_binds (Envir.alist_of env);
wenzelm@5819
   519
wenzelm@5819
   520
wenzelm@5819
   521
(* add_binds(_i) -- sequential *)
wenzelm@5819
   522
wenzelm@5819
   523
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@5819
   524
  let val t = prep ctxt raw_t in
wenzelm@5819
   525
    if can Syntax.dest_binding x then ctxt |> update_binds [(xi, t)]
wenzelm@5819
   526
    else raise CONTEXT ("Illegal variable name for term binding: " ^
wenzelm@5819
   527
      quote (Syntax.string_of_vname xi), ctxt)
wenzelm@5819
   528
  end;
wenzelm@5819
   529
wenzelm@5819
   530
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@5819
   531
wenzelm@5819
   532
val add_binds = gen_binds read_term;
wenzelm@5819
   533
val add_binds_i = gen_binds cert_term;
wenzelm@5819
   534
wenzelm@5819
   535
wenzelm@5819
   536
(* match_binds(_i) -- parallel *)
wenzelm@5819
   537
wenzelm@5935
   538
fun prep_declare_match (prep_pat, prep) (ctxt, (raw_pats, raw_t)) =
wenzelm@5819
   539
  let
wenzelm@5935
   540
    val t = prep ctxt raw_t;
wenzelm@5994
   541
    val ctxt' = ctxt |> declare_term t;
wenzelm@6931
   542
    val matches = map (fn (f, raw_pat) => (prep_pat ctxt' raw_pat, f t)) raw_pats;
wenzelm@6931
   543
           (* FIXME seq / par / simult (??) *)
wenzelm@6931
   544
  in (ctxt', (matches, t)) end;
wenzelm@5819
   545
wenzelm@5935
   546
fun gen_match_binds _ [] ctxt = ctxt
wenzelm@6931
   547
  | gen_match_binds prepp args ctxt =
wenzelm@5935
   548
      let
wenzelm@6931
   549
        val raw_pairs = map (apfst (map (pair I))) args;
wenzelm@5935
   550
        val (ctxt', matches) = foldl_map (prep_declare_match prepp) (ctxt, raw_pairs);
wenzelm@5935
   551
        val pairs = flat (map #1 matches);
wenzelm@5935
   552
        val Context {defs = (_, _, maxidx, _), ...} = ctxt';
wenzelm@5935
   553
        val envs = Unify.smash_unifiers (sign_of ctxt', Envir.empty maxidx, pairs);
wenzelm@5935
   554
        val env =
wenzelm@5935
   555
          (case Seq.pull envs of
wenzelm@5935
   556
            None => raise CONTEXT ("Pattern match failed!", ctxt')
wenzelm@5935
   557
          | Some (env, _) => env);
wenzelm@5935
   558
      in ctxt' |> update_binds_env env end;
wenzelm@5935
   559
wenzelm@5935
   560
val match_binds = gen_match_binds (read_term_pat, read_term);
wenzelm@5935
   561
val match_binds_i = gen_match_binds (cert_term_pat, cert_term);
wenzelm@5935
   562
wenzelm@5935
   563
wenzelm@5935
   564
(* bind proposition patterns *)
wenzelm@5935
   565
wenzelm@6931
   566
fun gen_bind_propp prepp (ctxt, (raw_prop, (raw_pats1, raw_pats2))) =
wenzelm@6931
   567
  let
wenzelm@6931
   568
    val raw_pats = map (pair I) raw_pats1 @ map (pair Logic.strip_imp_concl) raw_pats2;
wenzelm@6931
   569
    val (ctxt', (pairs, prop)) = prep_declare_match prepp (ctxt, (raw_pats, raw_prop));
wenzelm@5935
   570
  in (ctxt' |> match_binds_i (map (apfst single) pairs), prop) end;
wenzelm@5935
   571
wenzelm@5935
   572
val bind_propp = gen_bind_propp (read_prop_pat, read_prop);
wenzelm@5935
   573
val bind_propp_i = gen_bind_propp (cert_prop_pat, cert_prop);
wenzelm@5819
   574
wenzelm@5819
   575
wenzelm@6789
   576
(* auto binds *)
wenzelm@6789
   577
wenzelm@6789
   578
val auto_bind_goal = add_binds_i o AutoBind.goal;
wenzelm@6797
   579
val auto_bind_facts = add_binds_i oo AutoBind.facts;
wenzelm@6789
   580
wenzelm@6789
   581
wenzelm@5819
   582
wenzelm@5819
   583
(** theorems **)
wenzelm@5819
   584
wenzelm@5819
   585
(* thms_closure *)
wenzelm@5819
   586
wenzelm@5819
   587
fun thms_closure (Context {thy, thms, ...}) =
wenzelm@5819
   588
  let
wenzelm@5819
   589
    val global_closure = PureThy.thms_closure thy;
wenzelm@5819
   590
    fun get name =
wenzelm@5819
   591
      (case global_closure name of
wenzelm@5819
   592
        None => Symtab.lookup (thms, name)
wenzelm@5819
   593
      | some => some);
wenzelm@5819
   594
  in get end;
wenzelm@5819
   595
wenzelm@5819
   596
wenzelm@6091
   597
(* get_thm(s) *)
wenzelm@5819
   598
wenzelm@6091
   599
fun get_thm (ctxt as Context {thy, thms, ...}) name =
wenzelm@5819
   600
  (case Symtab.lookup (thms, name) of
wenzelm@5819
   601
    Some [th] => th
wenzelm@5819
   602
  | Some _ => raise CONTEXT ("Single theorem expected: " ^ quote name, ctxt)
wenzelm@6091
   603
  | None => (PureThy.get_thm thy name handle THEORY (msg, _) => raise CONTEXT (msg, ctxt)));
wenzelm@5819
   604
wenzelm@6091
   605
fun get_thms (ctxt as Context {thy, thms, ...}) name =
wenzelm@5819
   606
  (case Symtab.lookup (thms, name) of
wenzelm@5819
   607
    Some ths => ths
wenzelm@6091
   608
  | None => (PureThy.get_thms thy name handle THEORY (msg, _) => raise CONTEXT (msg, ctxt)));
wenzelm@5819
   609
wenzelm@6091
   610
fun get_thmss ctxt names = flat (map (get_thms ctxt) names);
wenzelm@5819
   611
wenzelm@5819
   612
wenzelm@6091
   613
(* put_thm(s) *)
wenzelm@5819
   614
wenzelm@6091
   615
fun put_thms (name, ths) = map_context
wenzelm@5819
   616
  (fn (thy, data, asms, binds, thms, defs) =>
wenzelm@5819
   617
    (thy, data, asms, binds, Symtab.update ((name, ths), thms), defs));
wenzelm@5819
   618
wenzelm@6091
   619
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   620
wenzelm@6091
   621
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   622
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   623
wenzelm@5819
   624
wenzelm@6091
   625
(* have_thmss *)
wenzelm@5819
   626
wenzelm@6875
   627
fun have_thmss more_ths name more_attrs ths_attrs ctxt =
wenzelm@5819
   628
  let
wenzelm@5819
   629
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   630
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   631
      in (ct', th' :: ths) end
wenzelm@5819
   632
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@6875
   633
    val thms = flat (rev rev_thms) @ more_ths;
wenzelm@6091
   634
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   635
wenzelm@5819
   636
wenzelm@5819
   637
wenzelm@5819
   638
(** assumptions **)
wenzelm@5819
   639
wenzelm@5819
   640
(* get assumptions *)
wenzelm@5819
   641
wenzelm@6847
   642
fun assumptions (Context {asms = ((asms, _), _), ...}) = asms;
wenzelm@5819
   643
fun fixed_names (Context {asms = (_, (fixes, _)), ...}) = map #2 fixes;
wenzelm@5819
   644
wenzelm@5819
   645
wenzelm@5819
   646
(* assume *)
wenzelm@5819
   647
wenzelm@6847
   648
fun prems (Context {asms = ((_, asms), _), ...}) = flat (map #2 asms);
wenzelm@6797
   649
wenzelm@6847
   650
fun gen_assume prepp tac name attrs raw_prop_pats ctxt =
wenzelm@5819
   651
  let
wenzelm@5935
   652
    val (ctxt', props) = foldl_map prepp (ctxt, raw_prop_pats);
wenzelm@5819
   653
    val sign = sign_of ctxt';
wenzelm@6797
   654
    val Context {defs = (_, _, maxidx, _), ...} = ctxt';
wenzelm@5819
   655
wenzelm@6797
   656
    val cprops = map (Thm.cterm_of sign) props;
wenzelm@6847
   657
    val cprops_tac = map (rpair tac) cprops;
wenzelm@6797
   658
    val asms = map (Drule.forall_elim_vars (maxidx + 1) o Thm.assume) cprops;
wenzelm@5919
   659
wenzelm@5919
   660
    val ths = map (fn th => ([th], [])) asms;
wenzelm@6091
   661
    val (ctxt'', (_, thms)) =
wenzelm@5819
   662
      ctxt'
wenzelm@6797
   663
      |> auto_bind_facts name props
wenzelm@6875
   664
      |> have_thmss [] name (attrs @ [Drule.tag_assumption]) ths;
wenzelm@5819
   665
wenzelm@5819
   666
    val ctxt''' =
wenzelm@5819
   667
      ctxt''
wenzelm@6797
   668
      |> map_context (fn (thy, data, ((asms_ct, asms_th), fixes), binds, thms, defs) =>
wenzelm@6847
   669
        (thy, data, ((asms_ct @ cprops_tac, asms_th @ [(name, asms)]), fixes), binds, thms, defs));
wenzelm@6931
   670
  in (ctxt''', ((name, thms), prems ctxt''')) end;
wenzelm@5819
   671
wenzelm@5935
   672
val assume = gen_assume bind_propp;
wenzelm@5935
   673
val assume_i = gen_assume bind_propp_i;
wenzelm@5819
   674
wenzelm@5819
   675
wenzelm@5819
   676
(* fix *)
wenzelm@5819
   677
wenzelm@5819
   678
fun read_skolemT (Context {defs = (_, _, _, used), ...}) None = Type.param used ("'z", logicS)
wenzelm@5819
   679
  | read_skolemT ctxt (Some s) = read_typ ctxt s;
wenzelm@5819
   680
wenzelm@5819
   681
fun gen_fix prep check (ctxt, (x, raw_T)) =
wenzelm@5819
   682
  ctxt
wenzelm@5819
   683
  |> declare_term (Free (check_skolem ctxt check x, prep ctxt raw_T))
wenzelm@5819
   684
  |> map_context (fn (thy, data, (assumes, (fixes, names)), binds, thms, defs) =>
wenzelm@5819
   685
      let val x' = variant names x in
wenzelm@5819
   686
        (thy, data, (assumes, ((x, Syntax.skolem x') :: fixes, x' :: names)), binds, thms, defs)
wenzelm@5819
   687
      end);
wenzelm@5819
   688
wenzelm@5819
   689
fun gen_fixs prep check xs ctxt = foldl (gen_fix prep check) (ctxt, xs);
wenzelm@5819
   690
wenzelm@5819
   691
wenzelm@5819
   692
val fix = gen_fixs read_skolemT true;
wenzelm@5819
   693
val fix_i = gen_fixs cert_typ false;
wenzelm@5819
   694
wenzelm@5819
   695
wenzelm@6931
   696
(* used names *)
wenzelm@6895
   697
wenzelm@6895
   698
fun transfer_used_names (Context {asms = (_, (_, names)), defs = (_, _, _, used), ...}) =
wenzelm@6895
   699
  map_context (fn (thy, data, (asms, (fixes, _)), binds, thms, (types, sorts, maxidx, _)) =>
wenzelm@6895
   700
    (thy, data, (asms, (fixes, names)), binds, thms, (types, sorts, maxidx, used)));
wenzelm@6895
   701
wenzelm@5819
   702
wenzelm@5819
   703
(** theory setup **)
wenzelm@5819
   704
wenzelm@5819
   705
val setup = [ProofDataData.init];
wenzelm@5819
   706
wenzelm@5819
   707
wenzelm@5819
   708
end;