src/Pure/Isar/proof_context.ML
author wenzelm
Sun Jan 07 21:36:59 2001 +0100 (2001-01-07 ago)
changeset 10818 37fa05a12459
parent 10810 619586bd854b
child 10830 d19f9f4c35ee
permissions -rw-r--r--
tuned output;
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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 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 get_skolem: context -> string -> string
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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_terms: context -> string list -> term list
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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 drop_schematic: indexname * term option -> indexname * term option
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  val add_binds: (indexname * string option) list -> context -> context
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  val add_binds_i: (indexname * term option) list -> context -> context
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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)) list list
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    -> context * (term * (term list * term list)) list list
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  val cert_propp: context * (term * (term list * term list)) list list
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    -> context * (term * (term list * term list)) list list
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  val read_propp_schematic: context * (string * (string list * string list)) list list
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    -> context * (term * (term list * term list)) list list
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  val cert_propp_schematic: context * (term * (term list * term list)) list list
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    -> context * (term * (term list * term list)) list list
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  val bind_propp: context * (string * (string list * string list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_i: context * (term * (term list * term list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_schematic: context * (string * (string list * string list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_schematic_i: context * (term * (term list * term list)) list list
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    -> context * (term list list * (context -> context))
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  val get_thm: context -> string -> thm
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  val get_thm_closure: context -> string -> thm
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  val get_thms: context -> string -> thm list
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  val get_thms_closure: context -> string -> thm list
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  val put_thm: string * thm -> context -> context
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  val put_thms: string * thm list -> context -> context
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  val put_thmss: (string * thm list) list -> context -> context
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  val reset_thms: string -> context -> context
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  val have_thmss:
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    ((string * context attribute list) * (thm list * context attribute list) list) list ->
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      context -> context * (string * thm list) list
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  val assume: exporter
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    -> ((string * context attribute list) * (string * (string list * string list)) list) list
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    -> context -> context * ((string * thm list) list * thm list)
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  val assume_i: exporter
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    -> ((string * context attribute list) * (term * (term list * term list)) list) list
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    -> context -> context * ((string * thm list) list * thm list)
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  val read_vars: context * (string list * string option) -> context * (string list * typ option)
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  val cert_vars: context * (string list * typ option) -> context * (string list * typ option)
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  val fix: (string list * string option) list -> context -> context
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  val fix_i: (string list * typ option) list -> context -> context
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  val bind_skolem: context -> string list -> term -> term
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  val get_case: context -> string -> RuleCases.T
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  val add_cases: (string * RuleCases.T) list -> context -> context
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  val apply_case: context -> RuleCases.T
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    -> (string * typ) list * (indexname * term option) list * term list
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  val show_hyps: bool ref
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  val pretty_thm: thm -> Pretty.T
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  val verbose: bool ref
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  val setmp_verbose: ('a -> 'b) -> 'a -> 'b
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  val print_binds: context -> unit
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  val print_thms: context -> unit
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  val print_cases: context -> unit
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  val prems_limit: int ref
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  val pretty_prems: context -> Pretty.T list
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  val pretty_context: context -> Pretty.T list
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  val 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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(** 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, cases, defs) =>
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    (thy, Symtab.update ((Object.name_of_kind kind, f x), data), asms, binds, thms, cases, 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, ([], Symtab.empty)))
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  end;
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(* get assumptions *)
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fun assumptions (Context {asms = ((asms, _), _), ...}) = asms;
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fun fixed_names (Context {asms = (_, (fixes, _)), ...}) = map #2 fixes;
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fun used_table (Context {defs = (_, _, (_, tab)), ...}) = tab;
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(** default sorts and types **)
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fun def_sort (Context {defs = (_, sorts, _), ...}) xi = Vartab.lookup (sorts, xi);
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fun def_type (Context {binds, defs = (types, _, _), ...}) is_pat xi =
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  (case Vartab.lookup (types, xi) of
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    None =>
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      if is_pat then None else
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        (case Vartab.lookup (binds, xi) of
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          Some (Some (_, T)) => Some (TypeInfer.polymorphicT T)
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        | _ => None)
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  | some => some);
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(** prepare types **)
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local
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fun read_typ_aux read ctxt s =
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  transform_error (read (sign_of ctxt, def_sort ctxt)) s
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    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
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fun cert_typ_aux cert ctxt raw_T =
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  cert (sign_of ctxt) raw_T
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    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
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in
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val read_typ         = read_typ_aux Sign.read_typ;
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val read_typ_no_norm = read_typ_aux Sign.read_typ_no_norm;
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val cert_typ         = cert_typ_aux Sign.certify_typ;
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val cert_typ_no_norm = cert_typ_aux Sign.certify_typ_no_norm;
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end;
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(* internalize Skolem constants *)
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fun fixes_of (Context {asms = (_, (fixes, _)), ...}) = fixes;
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fun lookup_skolem ctxt x = assoc (fixes_of ctxt, x);
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fun get_skolem ctxt x = if_none (lookup_skolem ctxt x) x;
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fun no_skolem no_internal ctxt x =
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  if can Syntax.dest_skolem x then
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    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
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  else if no_internal andalso can Syntax.dest_internal x then
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    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
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  else x;
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fun intern_skolem ctxt =
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  let
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    fun intern (t as Free (x, T)) =
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          (case lookup_skolem ctxt (no_skolem true ctxt x) of
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            Some x' => Free (x', T)
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          | None => t)
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      | intern (t $ u) = intern t $ intern u
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      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
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      | intern a = a;
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  in intern end;
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(* externalize Skolem constants -- for printing purposes only *)
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fun extern_skolem ctxt =
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  let
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    val rev_fixes = map Library.swap (fixes_of ctxt);
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wenzelm@9133
   329
    fun extern (t as Free (x, T)) =
wenzelm@9133
   330
          (case assoc (rev_fixes, x) of
wenzelm@10583
   331
            Some x' => Free (if lookup_skolem ctxt x' = Some x then x' else NameSpace.hidden x', T)
wenzelm@9133
   332
          | None => t)
wenzelm@9133
   333
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   334
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   335
      | extern a = a;
wenzelm@9133
   336
  in extern end
wenzelm@9133
   337
wenzelm@8096
   338
wenzelm@5819
   339
(** prepare terms and propositions **)
wenzelm@5819
   340
wenzelm@5819
   341
(*
wenzelm@5819
   342
  (1) read / certify wrt. signature of context
wenzelm@5819
   343
  (2) intern Skolem constants
wenzelm@5819
   344
  (3) expand term bindings
wenzelm@5819
   345
*)
wenzelm@5819
   346
wenzelm@5819
   347
wenzelm@5819
   348
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   349
wenzelm@5874
   350
fun read_def_termTs freeze sg (types, sorts, used) sTs =
wenzelm@8616
   351
  Sign.read_def_terms (sg, types, sorts) used freeze sTs;
wenzelm@5874
   352
wenzelm@5874
   353
fun read_def_termT freeze sg defs sT = apfst hd (read_def_termTs freeze sg defs [sT]);
wenzelm@5874
   354
wenzelm@8096
   355
fun read_term_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, TypeInfer.logicT));
wenzelm@8096
   356
fun read_prop_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, propT));
wenzelm@10465
   357
fun read_terms_sg freeze sg defs =
wenzelm@10465
   358
  #1 o read_def_termTs freeze sg defs o map (rpair TypeInfer.logicT);
wenzelm@10465
   359
fun read_props_sg freeze sg defs = #1 o read_def_termTs freeze sg defs o map (rpair propT);
wenzelm@5819
   360
wenzelm@5819
   361
wenzelm@5819
   362
fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   363
wenzelm@5819
   364
fun cert_prop_sg sg tm =
wenzelm@5819
   365
  let
wenzelm@5819
   366
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   367
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@10465
   368
  in if T = propT then t else raise TERM ("Term not of type prop", [t]) end;
wenzelm@5819
   369
wenzelm@5819
   370
wenzelm@5819
   371
(* norm_term *)
wenzelm@5819
   372
wenzelm@5819
   373
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   374
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   375
wenzelm@8616
   376
fun unifyT ctxt (T, U) =
wenzelm@8616
   377
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@8616
   378
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) maxidx Vartab.empty (T, U)) end;
wenzelm@8616
   379
wenzelm@10554
   380
fun norm_term (ctxt as Context {binds, ...}) schematic =
wenzelm@5819
   381
  let
wenzelm@5819
   382
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   383
    exception SAME;
wenzelm@5819
   384
wenzelm@5819
   385
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   386
          (case Vartab.lookup (binds, xi) of
wenzelm@7606
   387
            Some (Some (u, U)) =>
wenzelm@8616
   388
              let
wenzelm@8616
   389
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
wenzelm@8616
   390
                  raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u]);
wenzelm@8616
   391
                val u' = Term.subst_TVars_Vartab env u;
wenzelm@8616
   392
              in norm u' handle SAME => u' end
wenzelm@10554
   393
          | _ =>
wenzelm@10554
   394
            if schematic then raise SAME
wenzelm@10554
   395
            else raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   396
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   397
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   398
      | norm (f $ t) =
wenzelm@5819
   399
          ((case norm f of
wenzelm@5819
   400
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   401
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   402
      | norm _ =  raise SAME
wenzelm@5819
   403
    and normh t = norm t handle SAME => t
wenzelm@5819
   404
  in normh end;
wenzelm@5819
   405
wenzelm@5819
   406
wenzelm@6550
   407
(* dummy patterns *)
wenzelm@6550
   408
wenzelm@9540
   409
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   410
wenzelm@9540
   411
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   412
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   413
wenzelm@6550
   414
wenzelm@5819
   415
(* read terms *)
wenzelm@5819
   416
wenzelm@10554
   417
local
wenzelm@10554
   418
wenzelm@10554
   419
fun gen_read read app is_pat schematic (ctxt as Context {defs = (_, _, (used, _)), ...}) s =
wenzelm@7663
   420
  (transform_error (read (sign_of ctxt) (def_type ctxt is_pat, def_sort ctxt, used)) s
wenzelm@7663
   421
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@7663
   422
    | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@9291
   423
  |> app (intern_skolem ctxt)
wenzelm@10554
   424
  |> app (if is_pat then I else norm_term ctxt schematic)
wenzelm@7663
   425
  |> app (if is_pat then prepare_dummies else (reject_dummies ctxt));
wenzelm@5819
   426
wenzelm@10554
   427
in
wenzelm@10554
   428
wenzelm@10554
   429
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false false;
wenzelm@10554
   430
val read_termT_pats = #1 oo gen_read (read_def_termTs false) (apfst o map) true false;
wenzelm@8096
   431
wenzelm@8096
   432
fun read_term_pats T ctxt pats = read_termT_pats ctxt (map (rpair T) pats);
wenzelm@8096
   433
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   434
wenzelm@10554
   435
val read_term = gen_read (read_term_sg true) I false false;
wenzelm@10554
   436
val read_prop = gen_read (read_prop_sg true) I false false;
wenzelm@10554
   437
val read_terms = gen_read (read_terms_sg true) map false false;
wenzelm@10465
   438
val read_props = gen_read (read_props_sg true) map false;
wenzelm@5819
   439
wenzelm@10554
   440
end;
wenzelm@10554
   441
wenzelm@5819
   442
wenzelm@5819
   443
(* certify terms *)
wenzelm@5819
   444
wenzelm@10554
   445
local
wenzelm@10554
   446
wenzelm@10554
   447
fun gen_cert cert is_pat schematic ctxt t = t
wenzelm@10554
   448
  |> (if is_pat then I else norm_term ctxt schematic)
wenzelm@8616
   449
  |> (fn t' => cert (sign_of ctxt) t' handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   450
wenzelm@10554
   451
in
wenzelm@8096
   452
wenzelm@10554
   453
val cert_term = gen_cert cert_term_sg false false;
wenzelm@10554
   454
val cert_prop = gen_cert cert_prop_sg false false;
wenzelm@10554
   455
val cert_props = map oo gen_cert cert_prop_sg false;
wenzelm@10554
   456
wenzelm@10554
   457
fun cert_term_pats _ = map o gen_cert cert_term_sg true false;
wenzelm@10554
   458
val cert_prop_pats = map o gen_cert cert_prop_sg true false;
wenzelm@10554
   459
wenzelm@10554
   460
end;
wenzelm@5819
   461
wenzelm@5819
   462
wenzelm@5819
   463
(* declare terms *)
wenzelm@5819
   464
wenzelm@10381
   465
local
wenzelm@10381
   466
wenzelm@5819
   467
val ins_types = foldl_aterms
wenzelm@5819
   468
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   469
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   470
    | (types, _) => types);
wenzelm@5819
   471
wenzelm@5819
   472
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   473
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   474
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   475
    | (sorts, _) => sorts));
wenzelm@5819
   476
wenzelm@8616
   477
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@8616
   478
  (fn ((used, tab), TFree (x, _)) => (x ins used, Symtab.update_multi ((x, t), tab))
wenzelm@5819
   479
    | (used, _) => used));
wenzelm@5819
   480
wenzelm@7663
   481
fun ins_skolem def_ty = foldr
wenzelm@5994
   482
  (fn ((x, x'), types) =>
wenzelm@7663
   483
    (case def_ty x' of
wenzelm@5994
   484
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   485
    | None => types));
wenzelm@5994
   486
wenzelm@8373
   487
fun map_defaults f = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   488
  (thy, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   489
wenzelm@10381
   490
fun declare_syn (ctxt, t) =
wenzelm@5819
   491
  ctxt
wenzelm@7670
   492
  |> map_defaults (fn (types, sorts, used) => (ins_types (types, t), sorts, used))
wenzelm@10381
   493
  |> map_defaults (fn (types, sorts, used) => (types, ins_sorts (sorts, t), used));
wenzelm@10381
   494
wenzelm@10381
   495
fun declare_occ (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@10381
   496
  declare_syn (ctxt, t)
wenzelm@7670
   497
  |> map_defaults (fn (types, sorts, used) => (types, sorts, ins_used (used, t)))
wenzelm@7670
   498
  |> map_defaults (fn (types, sorts, used) =>
wenzelm@7670
   499
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, used));
wenzelm@5819
   500
wenzelm@10381
   501
in
wenzelm@5819
   502
wenzelm@10381
   503
fun declare_term t ctxt = declare_occ (ctxt, t);
wenzelm@10381
   504
fun declare_terms ts ctxt = foldl declare_occ (ctxt, ts);
wenzelm@10381
   505
fun predeclare_terms ts ctxt = foldl declare_syn (ctxt, ts);
wenzelm@10381
   506
wenzelm@10381
   507
end;
wenzelm@5819
   508
wenzelm@5819
   509
wenzelm@8616
   510
wenzelm@8616
   511
(** Hindley-Milner polymorphism **)
wenzelm@8616
   512
wenzelm@7925
   513
(* warn_extra_tfrees *)
wenzelm@7925
   514
wenzelm@8616
   515
local
wenzelm@8616
   516
wenzelm@8616
   517
fun used_free (a, ts) =
wenzelm@8616
   518
  (case mapfilter (fn Free (x, _) => Some x | _ => None) ts of
wenzelm@8616
   519
    [] => None
wenzelm@8616
   520
  | xs => Some (a, xs));
wenzelm@8616
   521
wenzelm@8616
   522
fun warn_extra (names1: string list, tab1) (names2, tab2) =
wenzelm@8616
   523
  if names1 = names2 then ()
wenzelm@7925
   524
  else
wenzelm@8616
   525
    let
wenzelm@8616
   526
      val extra =
wenzelm@8616
   527
        Library.gen_rems Library.eq_fst (Symtab.dest tab2, Symtab.dest tab1)
wenzelm@8616
   528
        |> mapfilter used_free;
wenzelm@8616
   529
      val tfrees = map #1 extra;
wenzelm@8616
   530
      val frees = Library.sort_strings (Library.distinct (flat (map #2 extra)));
wenzelm@8616
   531
    in
wenzelm@8616
   532
      if null extra then ()
wenzelm@8616
   533
      else warning ("Danger! Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@8616
   534
          space_implode " or " frees)
wenzelm@8616
   535
    end;
wenzelm@8616
   536
wenzelm@8616
   537
in
wenzelm@7925
   538
wenzelm@7925
   539
fun warn_extra_tfrees (ctxt1 as Context {defs = (_, _, used1), ...})
wenzelm@7925
   540
    (ctxt2 as Context {defs = (_, _, used2), ...}) = (warn_extra used1 used2; ctxt2);
wenzelm@7925
   541
wenzelm@8616
   542
end;
wenzelm@8616
   543
wenzelm@8616
   544
wenzelm@8616
   545
(* generalize type variables *)
wenzelm@8616
   546
wenzelm@8616
   547
fun gen_tfrees inner opt_outer =
wenzelm@8616
   548
  let
wenzelm@8616
   549
    val inner_used = used_table inner;
wenzelm@8616
   550
    val inner_fixes = fixed_names inner;
wenzelm@8616
   551
    val (outer_used, outer_fixes) =
wenzelm@8616
   552
      (case opt_outer of
wenzelm@8616
   553
        None => (Symtab.empty, [])
wenzelm@8616
   554
      | Some ctxt => (used_table ctxt, fixed_names ctxt));
wenzelm@8616
   555
wenzelm@8616
   556
    val extra_fixes = inner_fixes \\ outer_fixes;
wenzelm@8616
   557
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   558
      | still_fixed _ = false;
wenzelm@8616
   559
wenzelm@8616
   560
    fun add (gen, (a, xs)) =
wenzelm@8616
   561
      if is_some (Symtab.lookup (outer_used, a)) orelse exists still_fixed xs
wenzelm@8616
   562
      then gen else a :: gen;
wenzelm@8616
   563
  in Symtab.foldl add ([], inner_used) end;
wenzelm@8616
   564
wenzelm@8616
   565
fun generalizeT inner outer =
wenzelm@8616
   566
  let
wenzelm@8616
   567
    val tfrees = gen_tfrees inner (Some outer);
wenzelm@8616
   568
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@8616
   569
  in Term.map_type_tfree gen end;
wenzelm@8616
   570
wenzelm@8616
   571
val generalize = Term.map_term_types oo generalizeT;
wenzelm@8616
   572
wenzelm@8616
   573
wenzelm@9553
   574
wenzelm@9553
   575
(** export theorems **)
wenzelm@8616
   576
wenzelm@8616
   577
fun get_free x (None, t as Free (y, _)) = if x = y then Some t else None
wenzelm@8616
   578
  | get_free _ (opt, _) = opt;
wenzelm@8616
   579
wenzelm@8616
   580
fun find_free t x = foldl_aterms (get_free x) (None, t);
wenzelm@8616
   581
wenzelm@8616
   582
wenzelm@8616
   583
local
wenzelm@8616
   584
wenzelm@9470
   585
fun export tfrees fixes goal_asms thm =
wenzelm@9470
   586
  thm
wenzelm@10810
   587
  |> Tactic.norm_hhf
wenzelm@9470
   588
  |> Seq.EVERY (rev (map op |> goal_asms))
wenzelm@9470
   589
  |> Seq.map (fn rule =>
wenzelm@9470
   590
    let
wenzelm@9470
   591
      val {sign, prop, maxidx, ...} = Thm.rep_thm rule;
wenzelm@9470
   592
      val frees = map (Thm.cterm_of sign) (mapfilter (find_free prop) fixes);
wenzelm@9470
   593
    in
wenzelm@9470
   594
      rule
wenzelm@9470
   595
      |> Drule.forall_intr_list frees
wenzelm@10810
   596
      |> Tactic.norm_hhf
wenzelm@9470
   597
      |> Drule.tvars_intr_list tfrees
wenzelm@9470
   598
    end);
wenzelm@8616
   599
wenzelm@8616
   600
fun diff_context inner None = (gen_tfrees inner None, fixed_names inner, assumptions inner)
wenzelm@8616
   601
  | diff_context inner (Some outer) =
wenzelm@8616
   602
      (gen_tfrees inner (Some outer),
wenzelm@8616
   603
        fixed_names inner \\ fixed_names outer,
wenzelm@8616
   604
        Library.drop (length (assumptions outer), assumptions inner));
wenzelm@8616
   605
wenzelm@8616
   606
in
wenzelm@8616
   607
wenzelm@9470
   608
fun export_wrt is_goal inner opt_outer =
wenzelm@8616
   609
  let
wenzelm@8616
   610
    val (tfrees, fixes, asms) = diff_context inner opt_outer;
wenzelm@9470
   611
    val goal_asms = map (fn (cprops, (exp, _)) => (map Drule.mk_cgoal cprops, exp)) asms;
wenzelm@9470
   612
    val tacs = flat (map (fn (cprops, (_, f)) => f is_goal (length cprops)) asms);
wenzelm@9470
   613
  in (export tfrees fixes goal_asms, tacs) end;
wenzelm@8616
   614
wenzelm@8616
   615
end;
wenzelm@8616
   616
wenzelm@7925
   617
wenzelm@5819
   618
wenzelm@5819
   619
(** bindings **)
wenzelm@5819
   620
wenzelm@5819
   621
(* update_binds *)
wenzelm@5819
   622
wenzelm@7606
   623
fun del_bind (ctxt, xi) =
wenzelm@7606
   624
  ctxt
wenzelm@8373
   625
  |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   626
      (thy, data, asms, Vartab.update ((xi, None), binds), thms, cases, defs));
wenzelm@7606
   627
wenzelm@8616
   628
fun upd_bind (ctxt, ((x, i), t)) =
wenzelm@8616
   629
  let
wenzelm@8616
   630
    val T = Term.fastype_of t;
wenzelm@8616
   631
    val t' =
wenzelm@8616
   632
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   633
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   634
  in
wenzelm@5819
   635
    ctxt
wenzelm@8616
   636
    |> declare_term t'
wenzelm@8373
   637
    |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8616
   638
        (thy, data, asms, Vartab.update (((x, i), Some (t', T)), binds), thms, cases, defs))
wenzelm@5819
   639
  end;
wenzelm@5819
   640
wenzelm@7606
   641
fun del_upd_bind (ctxt, (xi, None)) = del_bind (ctxt, xi)
wenzelm@7606
   642
  | del_upd_bind (ctxt, (xi, Some t)) = upd_bind (ctxt, (xi, t));
wenzelm@7606
   643
wenzelm@5819
   644
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@7606
   645
fun delete_update_binds bs ctxt = foldl del_upd_bind (ctxt, bs);
wenzelm@7606
   646
wenzelm@5819
   647
wenzelm@8096
   648
(* simult_matches *)
wenzelm@8096
   649
wenzelm@10554
   650
local
wenzelm@10554
   651
wenzelm@10554
   652
val add_vars = Term.foldl_aterms (fn (vs, Var (xi, _)) => xi ins vs | (vs, _) => vs);
wenzelm@10554
   653
fun vars_of ts = foldl add_vars ([], ts);
wenzelm@10554
   654
wenzelm@10554
   655
in
wenzelm@10554
   656
wenzelm@8616
   657
fun simult_matches ctxt [] = []
wenzelm@8616
   658
  | simult_matches ctxt pairs =
wenzelm@8096
   659
      let
wenzelm@10554
   660
        fun fail () = raise CONTEXT ("Pattern match failed!", ctxt);
wenzelm@10554
   661
wenzelm@8096
   662
        val maxidx = foldl (fn (i, (t1, t2)) =>
wenzelm@8096
   663
          Int.max (i, Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2))) (~1, pairs);
wenzelm@10554
   664
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx,
wenzelm@10554
   665
          map swap pairs);    (*prefer assignment of variables from patterns*)
wenzelm@10554
   666
        val env =
wenzelm@8096
   667
          (case Seq.pull envs of
wenzelm@10554
   668
            None => fail ()
wenzelm@10554
   669
          | Some (env, _) => env);    (*ignore further results*)
wenzelm@10554
   670
        val domain = filter_out Term.is_replaced_dummy_pattern (vars_of (map #1 pairs));
wenzelm@10554
   671
        val _ =    (*may not assign variables from text*)
wenzelm@10554
   672
          if null (map #1 (Envir.alist_of env) inter vars_of (map #2 pairs)) then ()
wenzelm@10554
   673
          else fail ();
wenzelm@10465
   674
        fun norm_bind (xi, t) = if xi mem domain then Some (xi, Envir.norm_term env t) else None;
wenzelm@10465
   675
      in mapfilter norm_bind (Envir.alist_of env) end;
wenzelm@8096
   676
wenzelm@10554
   677
end;
wenzelm@10554
   678
wenzelm@8096
   679
wenzelm@8096
   680
(* add_binds(_i) *)
wenzelm@5819
   681
wenzelm@7925
   682
local
wenzelm@7925
   683
wenzelm@5819
   684
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@7606
   685
  ctxt |> delete_update_binds [(xi, apsome (prep ctxt) raw_t)];
wenzelm@5819
   686
wenzelm@8616
   687
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@7925
   688
wenzelm@10810
   689
in
wenzelm@10810
   690
wenzelm@10554
   691
fun drop_schematic (b as (xi, Some t)) = if null (Term.term_vars t) then b else (xi, None)
wenzelm@10554
   692
  | drop_schematic b = b;
wenzelm@10554
   693
wenzelm@5819
   694
val add_binds = gen_binds read_term;
wenzelm@5819
   695
val add_binds_i = gen_binds cert_term;
wenzelm@8616
   696
wenzelm@10554
   697
val auto_bind_goal = add_binds_i o map drop_schematic o AutoBind.goal;
wenzelm@10554
   698
val auto_bind_facts = (add_binds_i o map drop_schematic) oo AutoBind.facts;
wenzelm@7925
   699
wenzelm@7925
   700
end;
wenzelm@5819
   701
wenzelm@5819
   702
wenzelm@8096
   703
(* match_bind(_i) *)
wenzelm@5819
   704
wenzelm@8096
   705
local
wenzelm@8096
   706
wenzelm@10465
   707
fun prep_bind prep_pats (ctxt, (raw_pats, t)) =
wenzelm@5819
   708
  let
wenzelm@8096
   709
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   710
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   711
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   712
  in (ctxt', binds) end;
wenzelm@7670
   713
wenzelm@10465
   714
fun gen_binds prep_terms prep_pats gen raw_binds ctxt =
wenzelm@8616
   715
  let
wenzelm@10465
   716
    val ts = prep_terms ctxt (map snd raw_binds);
wenzelm@10465
   717
    val (ctxt', binds) =
wenzelm@10465
   718
      apsnd flat (foldl_map (prep_bind prep_pats) (ctxt, map fst raw_binds ~~ ts));
wenzelm@8616
   719
    val binds' =
wenzelm@8616
   720
      if gen then map (apsnd (generalize ctxt' ctxt)) binds
wenzelm@8616
   721
      else binds;
wenzelm@8616
   722
    val binds'' = map (apsnd Some) binds';
wenzelm@8616
   723
  in
wenzelm@8616
   724
    warn_extra_tfrees ctxt
wenzelm@8616
   725
     (if gen then ctxt (*sic!*) |> declare_terms (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   726
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   727
  end;
wenzelm@8096
   728
wenzelm@8096
   729
in
wenzelm@5935
   730
wenzelm@10465
   731
val match_bind = gen_binds read_terms read_term_pats;
wenzelm@10465
   732
val match_bind_i = gen_binds (map o cert_term) cert_term_pats;
wenzelm@8096
   733
wenzelm@8096
   734
end;
wenzelm@5935
   735
wenzelm@5935
   736
wenzelm@10465
   737
(* propositions with patterns *)
wenzelm@5935
   738
wenzelm@10465
   739
local
wenzelm@8096
   740
wenzelm@10554
   741
fun prep_propp schematic prep_props prep_pats (context, args) =
wenzelm@10465
   742
  let
wenzelm@10465
   743
    fun prep ((ctxt, prop :: props), (_, (raw_pats1, raw_pats2))) =
wenzelm@10465
   744
          let
wenzelm@10465
   745
            val ctxt' = declare_term prop ctxt;
wenzelm@10465
   746
            val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@10465
   747
            val len1 = length raw_pats1;
wenzelm@10465
   748
          in ((ctxt', props), (prop, (take (len1, pats), drop (len1, pats)))) end
wenzelm@10465
   749
      | prep _ = sys_error "prep_propp";
wenzelm@10465
   750
    val ((context', _), propp) = foldl_map (foldl_map prep)
wenzelm@10554
   751
        ((context, prep_props schematic context (flat (map (map fst) args))), args);
wenzelm@10465
   752
  in (context', propp) end;
wenzelm@5935
   753
wenzelm@10465
   754
fun matches ctxt (prop, (pats1, pats2)) =
wenzelm@10465
   755
  simult_matches ctxt (map (rpair prop) pats1 @ map (rpair (Logic.strip_imp_concl prop)) pats2);
wenzelm@8096
   756
wenzelm@10465
   757
fun gen_bind_propp prepp (ctxt, raw_args) =
wenzelm@8096
   758
  let
wenzelm@10465
   759
    val (ctxt', args) = prepp (ctxt, raw_args);
wenzelm@10465
   760
    val binds = flat (flat (map (map (matches ctxt')) args));
wenzelm@10465
   761
    val propss = map (map #1) args;
wenzelm@8616
   762
wenzelm@10554
   763
    (*generalize result: context evaluated now, binds added later*)
wenzelm@8616
   764
    val gen = generalize ctxt' ctxt;
wenzelm@10465
   765
    fun gen_binds c = c |> add_binds_i (map (apsnd (Some o gen)) binds);
wenzelm@10465
   766
  in (ctxt' |> add_binds_i (map (apsnd Some) binds), (propss, gen_binds)) end;
wenzelm@8096
   767
wenzelm@10465
   768
in
wenzelm@10465
   769
wenzelm@10554
   770
val read_propp           = prep_propp false read_props read_prop_pats;
wenzelm@10554
   771
val cert_propp           = prep_propp false cert_props cert_prop_pats;
wenzelm@10554
   772
val read_propp_schematic = prep_propp true read_props read_prop_pats;
wenzelm@10554
   773
val cert_propp_schematic = prep_propp true cert_props cert_prop_pats;
wenzelm@10554
   774
wenzelm@10554
   775
val bind_propp             = gen_bind_propp read_propp;
wenzelm@10554
   776
val bind_propp_i           = gen_bind_propp cert_propp;
wenzelm@10554
   777
val bind_propp_schematic   = gen_bind_propp read_propp_schematic;
wenzelm@10554
   778
val bind_propp_schematic_i = gen_bind_propp cert_propp_schematic;
wenzelm@6789
   779
wenzelm@10465
   780
end;
wenzelm@10465
   781
wenzelm@6789
   782
wenzelm@5819
   783
wenzelm@5819
   784
(** theorems **)
wenzelm@5819
   785
wenzelm@6091
   786
(* get_thm(s) *)
wenzelm@5819
   787
wenzelm@9566
   788
(*beware of proper order of evaluation!*)
wenzelm@5819
   789
wenzelm@9566
   790
fun retrieve_thms f g (ctxt as Context {thy, thms, ...}) =
wenzelm@9566
   791
  let
wenzelm@9566
   792
    val sg_ref = Sign.self_ref (Theory.sign_of thy);
wenzelm@9566
   793
    val get_from_thy = f thy;
wenzelm@9566
   794
  in
wenzelm@9566
   795
    fn name =>
wenzelm@9566
   796
      (case Symtab.lookup (thms, name) of
wenzelm@9566
   797
        Some (Some ths) => map (Thm.transfer_sg (Sign.deref sg_ref)) ths
wenzelm@9566
   798
      | _ => get_from_thy name) |> g name
wenzelm@9566
   799
  end;
wenzelm@5819
   800
wenzelm@9566
   801
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   802
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   803
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   804
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   805
wenzelm@5819
   806
wenzelm@6091
   807
(* put_thm(s) *)
wenzelm@5819
   808
wenzelm@7479
   809
fun put_thms ("", _) = I
wenzelm@7479
   810
  | put_thms (name, ths) = map_context
wenzelm@8373
   811
      (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   812
        (thy, data, asms, binds, Symtab.update ((name, Some ths), thms), cases, defs));
wenzelm@5819
   813
wenzelm@6091
   814
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   815
wenzelm@6091
   816
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   817
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   818
wenzelm@5819
   819
wenzelm@7606
   820
(* reset_thms *)
wenzelm@7606
   821
wenzelm@8373
   822
fun reset_thms name = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   823
  (thy, data, asms, binds, Symtab.update ((name, None), thms), cases, defs));
wenzelm@7606
   824
wenzelm@7606
   825
wenzelm@6091
   826
(* have_thmss *)
wenzelm@5819
   827
wenzelm@9196
   828
fun have_thss (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
   829
  let
wenzelm@5819
   830
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   831
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   832
      in (ct', th' :: ths) end
wenzelm@5819
   833
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@9196
   834
    val thms = flat (rev rev_thms);
wenzelm@6091
   835
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   836
wenzelm@9196
   837
fun have_thmss args ctxt = foldl_map have_thss (ctxt, args);
wenzelm@9196
   838
wenzelm@5819
   839
wenzelm@5819
   840
wenzelm@5819
   841
(** assumptions **)
wenzelm@5819
   842
wenzelm@5819
   843
(* assume *)
wenzelm@5819
   844
wenzelm@7270
   845
local
wenzelm@6797
   846
wenzelm@10465
   847
fun add_assm (ctxt, ((name, attrs), props)) =
wenzelm@5819
   848
  let
wenzelm@10465
   849
    val cprops = map (Thm.cterm_of (sign_of ctxt)) props;
wenzelm@10810
   850
    val asms = map (Tactic.norm_hhf o Drule.assume_goal) cprops;
wenzelm@5919
   851
wenzelm@5919
   852
    val ths = map (fn th => ([th], [])) asms;
wenzelm@10465
   853
    val (ctxt', [(_, thms)]) =
wenzelm@10465
   854
      ctxt
wenzelm@6797
   855
      |> auto_bind_facts name props
wenzelm@9196
   856
      |> have_thmss [((name, attrs @ [Drule.tag_assumption]), ths)];
wenzelm@10465
   857
  in (ctxt', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
   858
wenzelm@9470
   859
fun gen_assms prepp exp args ctxt =
wenzelm@9470
   860
  let
wenzelm@10465
   861
    val (ctxt1, propss) = prepp (ctxt, map snd args);
wenzelm@10465
   862
    val (ctxt2, results) = foldl_map add_assm (ctxt1, map fst args ~~ propss);
wenzelm@10465
   863
wenzelm@9470
   864
    val cprops = flat (map #1 results);
wenzelm@9470
   865
    val asmss = map #2 results;
wenzelm@9470
   866
    val thmss = map #3 results;
wenzelm@10465
   867
    val ctxt3 =
wenzelm@10465
   868
      ctxt2
wenzelm@8373
   869
      |> map_context (fn (thy, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@9470
   870
        (thy, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@9470
   871
          cases, defs));
wenzelm@10465
   872
  in (warn_extra_tfrees ctxt ctxt3, (thmss, prems_of ctxt3)) end;
wenzelm@5819
   873
wenzelm@7270
   874
in
wenzelm@7270
   875
wenzelm@8616
   876
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
   877
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
   878
wenzelm@7270
   879
end;
wenzelm@5819
   880
wenzelm@5819
   881
wenzelm@8096
   882
(* variables *)
wenzelm@8096
   883
wenzelm@10381
   884
local
wenzelm@10381
   885
wenzelm@9291
   886
fun prep_vars prep_typ (ctxt, (xs, raw_T)) =
wenzelm@8096
   887
  let
wenzelm@9325
   888
    val _ = (case filter (not o Syntax.is_identifier) (map (no_skolem false ctxt) xs) of
wenzelm@8096
   889
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
   890
wenzelm@8096
   891
    val opt_T = apsome (prep_typ ctxt) raw_T;
wenzelm@8096
   892
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@10381
   893
    val ctxt' = ctxt |> predeclare_terms (map (fn x => Free (x, T)) xs);
wenzelm@8096
   894
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
   895
wenzelm@10381
   896
in
wenzelm@10381
   897
wenzelm@9291
   898
val read_vars = prep_vars read_typ;
wenzelm@9291
   899
val cert_vars = prep_vars cert_typ;
wenzelm@8096
   900
wenzelm@10381
   901
end;
wenzelm@10381
   902
wenzelm@8096
   903
wenzelm@5819
   904
(* fix *)
wenzelm@5819
   905
wenzelm@8096
   906
local
wenzelm@8096
   907
wenzelm@8096
   908
fun add_vars xs (fixes, names) =
wenzelm@8096
   909
  let
wenzelm@8096
   910
    val xs' = variantlist (xs, names);
wenzelm@8096
   911
    val fixes' = (xs ~~ map Syntax.skolem xs') @ fixes;
wenzelm@8096
   912
    val names' = xs' @ names;
wenzelm@8096
   913
  in (fixes', names') end;
wenzelm@8096
   914
wenzelm@8373
   915
fun map_vars f = map_context (fn (thy, data, (assumes, vars), binds, thms, cases, defs) =>
wenzelm@8373
   916
  (thy, data, (assumes, f vars), binds, thms, cases, defs));
wenzelm@5819
   917
wenzelm@8096
   918
fun gen_fix prep raw_vars ctxt =
wenzelm@8096
   919
  let
wenzelm@8096
   920
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
wenzelm@8096
   921
    val xs = flat (map fst varss);
wenzelm@8096
   922
  in
wenzelm@8096
   923
    (case Library.duplicates xs of
wenzelm@8096
   924
      [] => ()
wenzelm@8096
   925
    | dups => raise CONTEXT ("Duplicate variable name(s): " ^ commas_quote dups, ctxt));
wenzelm@8096
   926
    ctxt' |> map_vars (add_vars xs)
wenzelm@8096
   927
  end;
wenzelm@5819
   928
wenzelm@8096
   929
in
wenzelm@7679
   930
wenzelm@8096
   931
val fix = gen_fix read_vars;
wenzelm@8096
   932
val fix_i = gen_fix cert_vars;
wenzelm@8096
   933
wenzelm@8096
   934
end;
wenzelm@5819
   935
wenzelm@6895
   936
wenzelm@9291
   937
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
   938
fun bind_skolem ctxt xs =
wenzelm@9291
   939
  let
wenzelm@9291
   940
    val ctxt' = ctxt |> fix_i [(xs, None)];
wenzelm@9291
   941
    fun bind (t as Free (x, T)) =
wenzelm@9291
   942
          if x mem_string xs then
wenzelm@10583
   943
            (case lookup_skolem ctxt' x of Some x' => Free (x', T) | None => t)
wenzelm@9291
   944
          else t
wenzelm@9291
   945
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
   946
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
   947
      | bind a = a;
wenzelm@9291
   948
  in bind end;
wenzelm@9291
   949
wenzelm@9291
   950
wenzelm@5819
   951
wenzelm@8373
   952
(** cases **)
wenzelm@8373
   953
wenzelm@10810
   954
fun check_case ctxt name {fixes, assumes, binds} =
wenzelm@10810
   955
  if null (foldr Term.add_typ_tvars (map snd fixes, [])) andalso
wenzelm@10810
   956
    null (foldr Term.add_term_vars (assumes, [])) then
wenzelm@10810
   957
      {fixes = fixes, assumes = assumes, binds = map drop_schematic binds}
wenzelm@8403
   958
  else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt);
wenzelm@8403
   959
wenzelm@8373
   960
fun get_case (ctxt as Context {cases, ...}) name =
wenzelm@8426
   961
  (case assoc (cases, name) of
wenzelm@8373
   962
    None => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
wenzelm@10810
   963
  | Some c => check_case ctxt name c);
wenzelm@8373
   964
wenzelm@8384
   965
wenzelm@8373
   966
fun add_cases xs = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8426
   967
  (thy, data, asms, binds, thms, rev (filter_out (equal "" o #1) xs) @ cases, defs));
wenzelm@8373
   968
wenzelm@8373
   969
wenzelm@8373
   970
wenzelm@10810
   971
(** print context information **)
wenzelm@10810
   972
wenzelm@10810
   973
val show_hyps = ref false;
wenzelm@10810
   974
wenzelm@10810
   975
fun pretty_thm thm =
wenzelm@10810
   976
  if ! show_hyps then setmp Display.show_hyps true Display.pretty_thm_no_quote thm
wenzelm@10810
   977
  else Display.pretty_cterm (#prop (Thm.crep_thm thm));
wenzelm@10810
   978
wenzelm@10810
   979
val verbose = ref false;
wenzelm@10810
   980
fun verb f x = if ! verbose then f (x ()) else [];
wenzelm@10810
   981
fun verb_single x = verb Library.single x;
wenzelm@10810
   982
wenzelm@10810
   983
fun setmp_verbose f x = Library.setmp verbose true f x;
wenzelm@10810
   984
wenzelm@10810
   985
fun pretty_items prt name items =
wenzelm@10810
   986
  let
wenzelm@10810
   987
    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
wenzelm@10810
   988
      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
wenzelm@10810
   989
  in
wenzelm@10810
   990
    if null items andalso not (! verbose) then []
wenzelm@10810
   991
    else [Pretty.big_list name (map prt_itms items)]
wenzelm@10810
   992
  end;
wenzelm@10810
   993
wenzelm@10810
   994
wenzelm@10810
   995
(* term bindings *)
wenzelm@10810
   996
wenzelm@10810
   997
val smash_option = fn (_, None) => None | (xi, Some b) => Some (xi, b);
wenzelm@10810
   998
wenzelm@10810
   999
fun pretty_binds (ctxt as Context {binds, ...}) =
wenzelm@10810
  1000
  let
wenzelm@10810
  1001
    val prt_term = Sign.pretty_term (sign_of ctxt);
wenzelm@10810
  1002
    fun prt_bind (xi, (t, T)) = prt_term (Logic.mk_equals (Var (xi, T), t));
wenzelm@10810
  1003
    val bs = mapfilter smash_option (Vartab.dest binds);
wenzelm@10810
  1004
  in
wenzelm@10810
  1005
    if null bs andalso not (! verbose) then []
wenzelm@10810
  1006
    else [Pretty.big_list "term bindings:" (map prt_bind bs)]
wenzelm@10810
  1007
  end;
wenzelm@10810
  1008
wenzelm@10810
  1009
val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
wenzelm@10810
  1010
wenzelm@10810
  1011
wenzelm@10810
  1012
(* local theorems *)
wenzelm@10810
  1013
wenzelm@10810
  1014
fun pretty_thms (Context {thms, ...}) =
wenzelm@10810
  1015
  pretty_items pretty_thm "facts:" (mapfilter smash_option (Symtab.dest thms));
wenzelm@10810
  1016
wenzelm@10810
  1017
val print_thms = Pretty.writeln o Pretty.chunks o pretty_thms;
wenzelm@10810
  1018
wenzelm@10810
  1019
wenzelm@10810
  1020
(* local contexts *)
wenzelm@10810
  1021
wenzelm@10810
  1022
fun apply_case ctxt ({fixes, assumes, binds}: RuleCases.T) =
wenzelm@10810
  1023
  let
wenzelm@10810
  1024
    val xs = map (bind_skolem ctxt (map #1 fixes) o Free) fixes;
wenzelm@10810
  1025
    fun app t = foldl Term.betapply (t, xs);
wenzelm@10810
  1026
  in (fixes, map (apsnd (apsome app)) binds, map app assumes) end;
wenzelm@10810
  1027
wenzelm@10810
  1028
fun pretty_cases (ctxt as Context {cases, ...}) =
wenzelm@10810
  1029
  let
wenzelm@10810
  1030
    val prt_term = Sign.pretty_term (sign_of ctxt);
wenzelm@10810
  1031
    fun prt_let (xi, t) = Pretty.block
wenzelm@10818
  1032
      [Pretty.quote (prt_term (Var (xi, Term.fastype_of t))), Pretty.str " =", Pretty.brk 1,
wenzelm@10810
  1033
        Pretty.quote (prt_term t)];
wenzelm@10810
  1034
wenzelm@10810
  1035
    fun prt_sect _ _ _ [] = []
wenzelm@10810
  1036
      | prt_sect s sep prt xs = [Pretty.block (Pretty.breaks (Pretty.str s ::
wenzelm@10810
  1037
            flat (Library.separate sep (map (Library.single o prt) xs))))];
wenzelm@10810
  1038
wenzelm@10810
  1039
    fun prt_case (name, (xs, lets, asms)) = Pretty.block (Pretty.fbreaks
wenzelm@10810
  1040
      (Pretty.str (name ^ ":") ::
wenzelm@10810
  1041
        prt_sect "fix" [] (prt_term o Free) xs @
wenzelm@10810
  1042
        prt_sect "let" [Pretty.str "and"] prt_let
wenzelm@10810
  1043
          (mapfilter (fn (xi, Some t) => Some (xi, t) | _ => None) lets) @
wenzelm@10810
  1044
        prt_sect "assume" [] (Pretty.quote o prt_term) asms));
wenzelm@10810
  1045
wenzelm@10810
  1046
    val cases' = rev (Library.gen_distinct Library.eq_fst cases);
wenzelm@10810
  1047
  in
wenzelm@10810
  1048
    if null cases andalso not (! verbose) then []
wenzelm@10810
  1049
    else [Pretty.big_list "cases:" (map (prt_case o apsnd (apply_case ctxt)) cases')]
wenzelm@10810
  1050
  end;
wenzelm@10810
  1051
wenzelm@10810
  1052
val print_cases = Pretty.writeln o Pretty.chunks o pretty_cases;
wenzelm@10810
  1053
wenzelm@10810
  1054
wenzelm@10810
  1055
(* prems *)
wenzelm@10810
  1056
wenzelm@10810
  1057
val prems_limit = ref 10;
wenzelm@10810
  1058
wenzelm@10810
  1059
fun pretty_prems ctxt =
wenzelm@10810
  1060
  let
wenzelm@10810
  1061
    val limit = ! prems_limit;
wenzelm@10810
  1062
    val prems = prems_of ctxt;
wenzelm@10810
  1063
    val len = length prems;
wenzelm@10810
  1064
    val prt_prems =
wenzelm@10810
  1065
      (if len <= limit then [] else [Pretty.str "..."]) @
wenzelm@10810
  1066
      map pretty_thm (Library.drop (len - limit, prems));
wenzelm@10810
  1067
  in if null prems then [] else [Pretty.big_list "prems:" prt_prems] end;
wenzelm@10810
  1068
wenzelm@10810
  1069
wenzelm@10810
  1070
(* main context *)
wenzelm@10810
  1071
wenzelm@10810
  1072
fun pretty_context (ctxt as Context {asms = (_, (fixes, _)), cases,
wenzelm@10810
  1073
    defs = (types, sorts, (used, _)), ...}) =
wenzelm@10810
  1074
  let
wenzelm@10810
  1075
    val sign = sign_of ctxt;
wenzelm@10810
  1076
wenzelm@10810
  1077
    val prt_term = Sign.pretty_term sign;
wenzelm@10810
  1078
    val prt_typ = Sign.pretty_typ sign;
wenzelm@10810
  1079
    val prt_sort = Sign.pretty_sort sign;
wenzelm@10810
  1080
wenzelm@10810
  1081
    (*theory*)
wenzelm@10810
  1082
    val pretty_thy = Pretty.block [Pretty.str "Theory:", Pretty.brk 1, Sign.pretty_sg sign];
wenzelm@10810
  1083
wenzelm@10810
  1084
    (*fixes*)
wenzelm@10810
  1085
    fun prt_fix (x, x') = Pretty.block
wenzelm@10810
  1086
      [prt_term (Syntax.free x), Pretty.str " =", Pretty.brk 1, prt_term (Syntax.free x')];
wenzelm@10810
  1087
wenzelm@10810
  1088
    fun prt_fixes [] = []
wenzelm@10810
  1089
      | prt_fixes xs = [Pretty.block (Pretty.str "fixed variables:" :: Pretty.brk 1 ::
wenzelm@10810
  1090
          Pretty.commas (map prt_fix xs))];
wenzelm@10810
  1091
wenzelm@10810
  1092
    (*defaults*)
wenzelm@10810
  1093
    fun prt_atom prt prtT (x, X) = Pretty.block
wenzelm@10810
  1094
      [prt x, Pretty.str " ::", Pretty.brk 1, prtT X];
wenzelm@10810
  1095
wenzelm@10810
  1096
    fun prt_var (x, ~1) = prt_term (Syntax.free x)
wenzelm@10810
  1097
      | prt_var xi = prt_term (Syntax.var xi);
wenzelm@10810
  1098
wenzelm@10810
  1099
    fun prt_varT (x, ~1) = prt_typ (TFree (x, []))
wenzelm@10810
  1100
      | prt_varT xi = prt_typ (TVar (xi, []));
wenzelm@10810
  1101
wenzelm@10810
  1102
    val prt_defT = prt_atom prt_var prt_typ;
wenzelm@10810
  1103
    val prt_defS = prt_atom prt_varT prt_sort;
wenzelm@10810
  1104
  in
wenzelm@10810
  1105
    verb_single (K pretty_thy) @
wenzelm@10810
  1106
    prt_fixes (rev (filter_out (can Syntax.dest_internal o #1) fixes)) @
wenzelm@10810
  1107
    pretty_prems ctxt @
wenzelm@10810
  1108
    verb pretty_binds (K ctxt) @
wenzelm@10810
  1109
    verb pretty_thms (K ctxt) @
wenzelm@10810
  1110
    verb pretty_cases (K ctxt) @
wenzelm@10810
  1111
    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
wenzelm@10810
  1112
    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
wenzelm@10810
  1113
    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
wenzelm@10810
  1114
  end;
wenzelm@10810
  1115
wenzelm@10810
  1116
wenzelm@10810
  1117
wenzelm@5819
  1118
(** theory setup **)
wenzelm@5819
  1119
wenzelm@5819
  1120
val setup = [ProofDataData.init];
wenzelm@5819
  1121
wenzelm@5819
  1122
wenzelm@5819
  1123
end;