src/Pure/Isar/proof_context.ML
author wenzelm
Wed Oct 24 19:18:23 2001 +0200 (2001-10-24 ago)
changeset 11925 4747b4b84093
parent 11918 dfdf0798d7b8
child 11926 e31f781611b3
permissions -rw-r--r--
added read_prop_schematic;
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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_prop_schematic: 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
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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 export_assume: exporter
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  val export_presume: exporter
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  val export_def: exporter
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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
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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
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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 fix_direct: (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 -> string option list -> RuleCases.T
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  val add_cases: (string * RuleCases.T) list -> context -> context
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  val apply_case: RuleCases.T -> context -> context * ((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 = bool -> cterm list -> thm -> thm Seq.seq;
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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 =
wenzelm@9133
   328
  let
wenzelm@9133
   329
    val rev_fixes = map Library.swap (fixes_of ctxt);
wenzelm@9133
   330
wenzelm@9133
   331
    fun extern (t as Free (x, T)) =
wenzelm@9133
   332
          (case assoc (rev_fixes, x) of
wenzelm@10583
   333
            Some x' => Free (if lookup_skolem ctxt x' = Some x then x' else NameSpace.hidden x', T)
wenzelm@9133
   334
          | None => t)
wenzelm@9133
   335
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   336
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   337
      | extern a = a;
wenzelm@9133
   338
  in extern end
wenzelm@9133
   339
wenzelm@8096
   340
wenzelm@5819
   341
(** prepare terms and propositions **)
wenzelm@5819
   342
wenzelm@5819
   343
(*
wenzelm@5819
   344
  (1) read / certify wrt. signature of context
wenzelm@5819
   345
  (2) intern Skolem constants
wenzelm@5819
   346
  (3) expand term bindings
wenzelm@5819
   347
*)
wenzelm@5819
   348
wenzelm@5819
   349
wenzelm@5819
   350
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   351
wenzelm@5874
   352
fun read_def_termTs freeze sg (types, sorts, used) sTs =
wenzelm@8616
   353
  Sign.read_def_terms (sg, types, sorts) used freeze sTs;
wenzelm@5874
   354
wenzelm@5874
   355
fun read_def_termT freeze sg defs sT = apfst hd (read_def_termTs freeze sg defs [sT]);
wenzelm@5874
   356
wenzelm@8096
   357
fun read_term_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, TypeInfer.logicT));
wenzelm@8096
   358
fun read_prop_sg freeze sg defs s = #1 (read_def_termT freeze sg defs (s, propT));
wenzelm@10465
   359
fun read_terms_sg freeze sg defs =
wenzelm@10465
   360
  #1 o read_def_termTs freeze sg defs o map (rpair TypeInfer.logicT);
wenzelm@10465
   361
fun read_props_sg freeze sg defs = #1 o read_def_termTs freeze sg defs o map (rpair propT);
wenzelm@5819
   362
wenzelm@5819
   363
wenzelm@5819
   364
fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   365
wenzelm@5819
   366
fun cert_prop_sg sg tm =
wenzelm@5819
   367
  let
wenzelm@5819
   368
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   369
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@10465
   370
  in if T = propT then t else raise TERM ("Term not of type prop", [t]) end;
wenzelm@5819
   371
wenzelm@5819
   372
wenzelm@5819
   373
(* norm_term *)
wenzelm@5819
   374
wenzelm@5819
   375
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   376
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   377
wenzelm@8616
   378
fun unifyT ctxt (T, U) =
wenzelm@8616
   379
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@8616
   380
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) maxidx Vartab.empty (T, U)) end;
wenzelm@8616
   381
wenzelm@10554
   382
fun norm_term (ctxt as Context {binds, ...}) schematic =
wenzelm@5819
   383
  let
wenzelm@5819
   384
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   385
    exception SAME;
wenzelm@5819
   386
wenzelm@5819
   387
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   388
          (case Vartab.lookup (binds, xi) of
wenzelm@7606
   389
            Some (Some (u, U)) =>
wenzelm@8616
   390
              let
wenzelm@8616
   391
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
wenzelm@8616
   392
                  raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u]);
wenzelm@8616
   393
                val u' = Term.subst_TVars_Vartab env u;
wenzelm@8616
   394
              in norm u' handle SAME => u' end
wenzelm@10554
   395
          | _ =>
wenzelm@10554
   396
            if schematic then raise SAME
wenzelm@10554
   397
            else raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   398
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   399
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   400
      | norm (f $ t) =
wenzelm@5819
   401
          ((case norm f of
wenzelm@5819
   402
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   403
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   404
      | norm _ =  raise SAME
wenzelm@5819
   405
    and normh t = norm t handle SAME => t
wenzelm@5819
   406
  in normh end;
wenzelm@5819
   407
wenzelm@5819
   408
wenzelm@6550
   409
(* dummy patterns *)
wenzelm@6550
   410
wenzelm@9540
   411
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   412
wenzelm@9540
   413
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   414
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   415
wenzelm@6550
   416
wenzelm@5819
   417
(* read terms *)
wenzelm@5819
   418
wenzelm@10554
   419
local
wenzelm@10554
   420
wenzelm@10554
   421
fun gen_read read app is_pat schematic (ctxt as Context {defs = (_, _, (used, _)), ...}) s =
wenzelm@7663
   422
  (transform_error (read (sign_of ctxt) (def_type ctxt is_pat, def_sort ctxt, used)) s
wenzelm@7663
   423
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@7663
   424
    | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@9291
   425
  |> app (intern_skolem ctxt)
wenzelm@10554
   426
  |> app (if is_pat then I else norm_term ctxt schematic)
wenzelm@7663
   427
  |> app (if is_pat then prepare_dummies else (reject_dummies ctxt));
wenzelm@5819
   428
wenzelm@10554
   429
in
wenzelm@10554
   430
wenzelm@10554
   431
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false false;
wenzelm@10554
   432
val read_termT_pats = #1 oo gen_read (read_def_termTs false) (apfst o map) true false;
wenzelm@8096
   433
wenzelm@8096
   434
fun read_term_pats T ctxt pats = read_termT_pats ctxt (map (rpair T) pats);
wenzelm@8096
   435
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   436
wenzelm@10554
   437
val read_term = gen_read (read_term_sg true) I false false;
wenzelm@10554
   438
val read_prop = gen_read (read_prop_sg true) I false false;
wenzelm@11925
   439
val read_prop_schematic = gen_read (read_prop_sg true) I false true;
wenzelm@10554
   440
val read_terms = gen_read (read_terms_sg true) map false false;
wenzelm@10465
   441
val read_props = gen_read (read_props_sg true) map false;
wenzelm@5819
   442
wenzelm@10554
   443
end;
wenzelm@10554
   444
wenzelm@5819
   445
wenzelm@5819
   446
(* certify terms *)
wenzelm@5819
   447
wenzelm@10554
   448
local
wenzelm@10554
   449
wenzelm@10554
   450
fun gen_cert cert is_pat schematic ctxt t = t
wenzelm@10554
   451
  |> (if is_pat then I else norm_term ctxt schematic)
wenzelm@8616
   452
  |> (fn t' => cert (sign_of ctxt) t' handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   453
wenzelm@10554
   454
in
wenzelm@8096
   455
wenzelm@10554
   456
val cert_term = gen_cert cert_term_sg false false;
wenzelm@10554
   457
val cert_prop = gen_cert cert_prop_sg false false;
wenzelm@10554
   458
val cert_props = map oo gen_cert cert_prop_sg false;
wenzelm@10554
   459
wenzelm@10554
   460
fun cert_term_pats _ = map o gen_cert cert_term_sg true false;
wenzelm@10554
   461
val cert_prop_pats = map o gen_cert cert_prop_sg true false;
wenzelm@10554
   462
wenzelm@10554
   463
end;
wenzelm@5819
   464
wenzelm@5819
   465
wenzelm@5819
   466
(* declare terms *)
wenzelm@5819
   467
wenzelm@10381
   468
local
wenzelm@10381
   469
wenzelm@5819
   470
val ins_types = foldl_aterms
wenzelm@5819
   471
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   472
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   473
    | (types, _) => types);
wenzelm@5819
   474
wenzelm@5819
   475
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   476
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   477
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   478
    | (sorts, _) => sorts));
wenzelm@5819
   479
wenzelm@8616
   480
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@8616
   481
  (fn ((used, tab), TFree (x, _)) => (x ins used, Symtab.update_multi ((x, t), tab))
wenzelm@5819
   482
    | (used, _) => used));
wenzelm@5819
   483
wenzelm@7663
   484
fun ins_skolem def_ty = foldr
wenzelm@5994
   485
  (fn ((x, x'), types) =>
wenzelm@7663
   486
    (case def_ty x' of
wenzelm@5994
   487
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   488
    | None => types));
wenzelm@5994
   489
wenzelm@8373
   490
fun map_defaults f = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   491
  (thy, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   492
wenzelm@10381
   493
fun declare_syn (ctxt, t) =
wenzelm@5819
   494
  ctxt
wenzelm@7670
   495
  |> map_defaults (fn (types, sorts, used) => (ins_types (types, t), sorts, used))
wenzelm@10381
   496
  |> map_defaults (fn (types, sorts, used) => (types, ins_sorts (sorts, t), used));
wenzelm@10381
   497
wenzelm@10381
   498
fun declare_occ (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@10381
   499
  declare_syn (ctxt, t)
wenzelm@7670
   500
  |> map_defaults (fn (types, sorts, used) => (types, sorts, ins_used (used, t)))
wenzelm@7670
   501
  |> map_defaults (fn (types, sorts, used) =>
wenzelm@7670
   502
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, used));
wenzelm@5819
   503
wenzelm@10381
   504
in
wenzelm@5819
   505
wenzelm@10381
   506
fun declare_term t ctxt = declare_occ (ctxt, t);
wenzelm@10381
   507
fun declare_terms ts ctxt = foldl declare_occ (ctxt, ts);
wenzelm@10381
   508
fun predeclare_terms ts ctxt = foldl declare_syn (ctxt, ts);
wenzelm@10381
   509
wenzelm@10381
   510
end;
wenzelm@5819
   511
wenzelm@5819
   512
wenzelm@8616
   513
wenzelm@8616
   514
(** Hindley-Milner polymorphism **)
wenzelm@8616
   515
wenzelm@7925
   516
(* warn_extra_tfrees *)
wenzelm@7925
   517
wenzelm@8616
   518
local
wenzelm@8616
   519
wenzelm@8616
   520
fun used_free (a, ts) =
wenzelm@8616
   521
  (case mapfilter (fn Free (x, _) => Some x | _ => None) ts of
wenzelm@8616
   522
    [] => None
wenzelm@8616
   523
  | xs => Some (a, xs));
wenzelm@8616
   524
wenzelm@8616
   525
fun warn_extra (names1: string list, tab1) (names2, tab2) =
wenzelm@8616
   526
  if names1 = names2 then ()
wenzelm@7925
   527
  else
wenzelm@8616
   528
    let
wenzelm@8616
   529
      val extra =
wenzelm@8616
   530
        Library.gen_rems Library.eq_fst (Symtab.dest tab2, Symtab.dest tab1)
wenzelm@8616
   531
        |> mapfilter used_free;
wenzelm@8616
   532
      val tfrees = map #1 extra;
wenzelm@8616
   533
      val frees = Library.sort_strings (Library.distinct (flat (map #2 extra)));
wenzelm@8616
   534
    in
wenzelm@8616
   535
      if null extra then ()
wenzelm@8616
   536
      else warning ("Danger! Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@8616
   537
          space_implode " or " frees)
wenzelm@8616
   538
    end;
wenzelm@8616
   539
wenzelm@8616
   540
in
wenzelm@7925
   541
wenzelm@7925
   542
fun warn_extra_tfrees (ctxt1 as Context {defs = (_, _, used1), ...})
wenzelm@7925
   543
    (ctxt2 as Context {defs = (_, _, used2), ...}) = (warn_extra used1 used2; ctxt2);
wenzelm@7925
   544
wenzelm@8616
   545
end;
wenzelm@8616
   546
wenzelm@8616
   547
wenzelm@8616
   548
(* generalize type variables *)
wenzelm@8616
   549
wenzelm@8616
   550
fun gen_tfrees inner opt_outer =
wenzelm@8616
   551
  let
wenzelm@8616
   552
    val inner_used = used_table inner;
wenzelm@8616
   553
    val inner_fixes = fixed_names inner;
wenzelm@8616
   554
    val (outer_used, outer_fixes) =
wenzelm@8616
   555
      (case opt_outer of
wenzelm@8616
   556
        None => (Symtab.empty, [])
wenzelm@8616
   557
      | Some ctxt => (used_table ctxt, fixed_names ctxt));
wenzelm@8616
   558
wenzelm@8616
   559
    val extra_fixes = inner_fixes \\ outer_fixes;
wenzelm@8616
   560
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   561
      | still_fixed _ = false;
wenzelm@8616
   562
wenzelm@8616
   563
    fun add (gen, (a, xs)) =
wenzelm@8616
   564
      if is_some (Symtab.lookup (outer_used, a)) orelse exists still_fixed xs
wenzelm@8616
   565
      then gen else a :: gen;
wenzelm@8616
   566
  in Symtab.foldl add ([], inner_used) end;
wenzelm@8616
   567
wenzelm@8616
   568
fun generalizeT inner outer =
wenzelm@8616
   569
  let
wenzelm@8616
   570
    val tfrees = gen_tfrees inner (Some outer);
wenzelm@8616
   571
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@8616
   572
  in Term.map_type_tfree gen end;
wenzelm@8616
   573
wenzelm@8616
   574
val generalize = Term.map_term_types oo generalizeT;
wenzelm@8616
   575
wenzelm@8616
   576
wenzelm@9553
   577
wenzelm@9553
   578
(** export theorems **)
wenzelm@8616
   579
wenzelm@8616
   580
fun get_free x (None, t as Free (y, _)) = if x = y then Some t else None
wenzelm@8616
   581
  | get_free _ (opt, _) = opt;
wenzelm@8616
   582
wenzelm@8616
   583
fun find_free t x = foldl_aterms (get_free x) (None, t);
wenzelm@8616
   584
wenzelm@8616
   585
fun diff_context inner None = (gen_tfrees inner None, fixed_names inner, assumptions inner)
wenzelm@8616
   586
  | diff_context inner (Some outer) =
wenzelm@8616
   587
      (gen_tfrees inner (Some outer),
wenzelm@8616
   588
        fixed_names inner \\ fixed_names outer,
wenzelm@8616
   589
        Library.drop (length (assumptions outer), assumptions inner));
wenzelm@8616
   590
wenzelm@9470
   591
fun export_wrt is_goal inner opt_outer =
wenzelm@8616
   592
  let
wenzelm@8616
   593
    val (tfrees, fixes, asms) = diff_context inner opt_outer;
wenzelm@11816
   594
    val exp_asms = map (fn (cprops, exp) => exp is_goal cprops) asms;
wenzelm@11816
   595
  in fn thm =>
wenzelm@11816
   596
    thm
wenzelm@11816
   597
    |> Tactic.norm_hhf
wenzelm@11816
   598
    |> Seq.EVERY (rev exp_asms)
wenzelm@11816
   599
    |> Seq.map (fn rule =>
wenzelm@11816
   600
      let
wenzelm@11816
   601
        val {sign, prop, ...} = Thm.rep_thm rule;
wenzelm@11816
   602
        val frees = map (Thm.cterm_of sign) (mapfilter (find_free prop) fixes);
wenzelm@11816
   603
      in
wenzelm@11816
   604
        rule
wenzelm@11816
   605
        |> Drule.forall_intr_list frees
wenzelm@11816
   606
        |> Tactic.norm_hhf
wenzelm@11816
   607
        |> Drule.tvars_intr_list tfrees
wenzelm@11816
   608
      end)
wenzelm@11816
   609
  end;
wenzelm@8616
   610
wenzelm@7925
   611
wenzelm@5819
   612
wenzelm@5819
   613
(** bindings **)
wenzelm@5819
   614
wenzelm@5819
   615
(* update_binds *)
wenzelm@5819
   616
wenzelm@7606
   617
fun del_bind (ctxt, xi) =
wenzelm@7606
   618
  ctxt
wenzelm@8373
   619
  |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   620
      (thy, data, asms, Vartab.update ((xi, None), binds), thms, cases, defs));
wenzelm@7606
   621
wenzelm@8616
   622
fun upd_bind (ctxt, ((x, i), t)) =
wenzelm@8616
   623
  let
wenzelm@8616
   624
    val T = Term.fastype_of t;
wenzelm@8616
   625
    val t' =
wenzelm@8616
   626
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   627
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   628
  in
wenzelm@5819
   629
    ctxt
wenzelm@8616
   630
    |> declare_term t'
wenzelm@8373
   631
    |> map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8616
   632
        (thy, data, asms, Vartab.update (((x, i), Some (t', T)), binds), thms, cases, defs))
wenzelm@5819
   633
  end;
wenzelm@5819
   634
wenzelm@7606
   635
fun del_upd_bind (ctxt, (xi, None)) = del_bind (ctxt, xi)
wenzelm@7606
   636
  | del_upd_bind (ctxt, (xi, Some t)) = upd_bind (ctxt, (xi, t));
wenzelm@7606
   637
wenzelm@5819
   638
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@7606
   639
fun delete_update_binds bs ctxt = foldl del_upd_bind (ctxt, bs);
wenzelm@7606
   640
wenzelm@5819
   641
wenzelm@8096
   642
(* simult_matches *)
wenzelm@8096
   643
wenzelm@10554
   644
local
wenzelm@10554
   645
wenzelm@10554
   646
val add_vars = Term.foldl_aterms (fn (vs, Var (xi, _)) => xi ins vs | (vs, _) => vs);
wenzelm@10554
   647
fun vars_of ts = foldl add_vars ([], ts);
wenzelm@10554
   648
wenzelm@10554
   649
in
wenzelm@10554
   650
wenzelm@8616
   651
fun simult_matches ctxt [] = []
wenzelm@8616
   652
  | simult_matches ctxt pairs =
wenzelm@8096
   653
      let
wenzelm@10554
   654
        fun fail () = raise CONTEXT ("Pattern match failed!", ctxt);
wenzelm@10554
   655
wenzelm@8096
   656
        val maxidx = foldl (fn (i, (t1, t2)) =>
wenzelm@8096
   657
          Int.max (i, Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2))) (~1, pairs);
wenzelm@10554
   658
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx,
wenzelm@10554
   659
          map swap pairs);    (*prefer assignment of variables from patterns*)
wenzelm@10554
   660
        val env =
wenzelm@8096
   661
          (case Seq.pull envs of
wenzelm@10554
   662
            None => fail ()
wenzelm@10554
   663
          | Some (env, _) => env);    (*ignore further results*)
wenzelm@10554
   664
        val domain = filter_out Term.is_replaced_dummy_pattern (vars_of (map #1 pairs));
wenzelm@10554
   665
        val _ =    (*may not assign variables from text*)
wenzelm@10554
   666
          if null (map #1 (Envir.alist_of env) inter vars_of (map #2 pairs)) then ()
wenzelm@10554
   667
          else fail ();
wenzelm@10465
   668
        fun norm_bind (xi, t) = if xi mem domain then Some (xi, Envir.norm_term env t) else None;
wenzelm@10465
   669
      in mapfilter norm_bind (Envir.alist_of env) end;
wenzelm@8096
   670
wenzelm@10554
   671
end;
wenzelm@10554
   672
wenzelm@8096
   673
wenzelm@8096
   674
(* add_binds(_i) *)
wenzelm@5819
   675
wenzelm@7925
   676
local
wenzelm@7925
   677
wenzelm@5819
   678
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@7606
   679
  ctxt |> delete_update_binds [(xi, apsome (prep ctxt) raw_t)];
wenzelm@5819
   680
wenzelm@8616
   681
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@7925
   682
wenzelm@10810
   683
in
wenzelm@10810
   684
wenzelm@10554
   685
fun drop_schematic (b as (xi, Some t)) = if null (Term.term_vars t) then b else (xi, None)
wenzelm@10554
   686
  | drop_schematic b = b;
wenzelm@10554
   687
wenzelm@5819
   688
val add_binds = gen_binds read_term;
wenzelm@5819
   689
val add_binds_i = gen_binds cert_term;
wenzelm@8616
   690
wenzelm@11764
   691
fun auto_bind_goal t ctxt =
wenzelm@11764
   692
  ctxt |> add_binds_i (map drop_schematic (AutoBind.goal (sign_of ctxt) t));
wenzelm@11764
   693
wenzelm@11764
   694
fun auto_bind_facts name ts ctxt =
wenzelm@11764
   695
  ctxt |> add_binds_i (map drop_schematic (AutoBind.facts (sign_of ctxt) name ts));
wenzelm@7925
   696
wenzelm@7925
   697
end;
wenzelm@5819
   698
wenzelm@5819
   699
wenzelm@8096
   700
(* match_bind(_i) *)
wenzelm@5819
   701
wenzelm@8096
   702
local
wenzelm@8096
   703
wenzelm@10465
   704
fun prep_bind prep_pats (ctxt, (raw_pats, t)) =
wenzelm@5819
   705
  let
wenzelm@8096
   706
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   707
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   708
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   709
  in (ctxt', binds) end;
wenzelm@7670
   710
wenzelm@10465
   711
fun gen_binds prep_terms prep_pats gen raw_binds ctxt =
wenzelm@8616
   712
  let
wenzelm@10465
   713
    val ts = prep_terms ctxt (map snd raw_binds);
wenzelm@10465
   714
    val (ctxt', binds) =
wenzelm@10465
   715
      apsnd flat (foldl_map (prep_bind prep_pats) (ctxt, map fst raw_binds ~~ ts));
wenzelm@8616
   716
    val binds' =
wenzelm@8616
   717
      if gen then map (apsnd (generalize ctxt' ctxt)) binds
wenzelm@8616
   718
      else binds;
wenzelm@8616
   719
    val binds'' = map (apsnd Some) binds';
wenzelm@8616
   720
  in
wenzelm@8616
   721
    warn_extra_tfrees ctxt
wenzelm@8616
   722
     (if gen then ctxt (*sic!*) |> declare_terms (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   723
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   724
  end;
wenzelm@8096
   725
wenzelm@8096
   726
in
wenzelm@5935
   727
wenzelm@10465
   728
val match_bind = gen_binds read_terms read_term_pats;
wenzelm@10465
   729
val match_bind_i = gen_binds (map o cert_term) cert_term_pats;
wenzelm@8096
   730
wenzelm@8096
   731
end;
wenzelm@5935
   732
wenzelm@5935
   733
wenzelm@10465
   734
(* propositions with patterns *)
wenzelm@5935
   735
wenzelm@10465
   736
local
wenzelm@8096
   737
wenzelm@10554
   738
fun prep_propp schematic prep_props prep_pats (context, args) =
wenzelm@10465
   739
  let
wenzelm@10465
   740
    fun prep ((ctxt, prop :: props), (_, (raw_pats1, raw_pats2))) =
wenzelm@10465
   741
          let
wenzelm@10465
   742
            val ctxt' = declare_term prop ctxt;
wenzelm@10465
   743
            val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@10465
   744
            val len1 = length raw_pats1;
wenzelm@10465
   745
          in ((ctxt', props), (prop, (take (len1, pats), drop (len1, pats)))) end
wenzelm@10465
   746
      | prep _ = sys_error "prep_propp";
wenzelm@10465
   747
    val ((context', _), propp) = foldl_map (foldl_map prep)
wenzelm@10554
   748
        ((context, prep_props schematic context (flat (map (map fst) args))), args);
wenzelm@10465
   749
  in (context', propp) end;
wenzelm@5935
   750
wenzelm@10465
   751
fun matches ctxt (prop, (pats1, pats2)) =
wenzelm@10465
   752
  simult_matches ctxt (map (rpair prop) pats1 @ map (rpair (Logic.strip_imp_concl prop)) pats2);
wenzelm@8096
   753
wenzelm@10465
   754
fun gen_bind_propp prepp (ctxt, raw_args) =
wenzelm@8096
   755
  let
wenzelm@10465
   756
    val (ctxt', args) = prepp (ctxt, raw_args);
wenzelm@10465
   757
    val binds = flat (flat (map (map (matches ctxt')) args));
wenzelm@10465
   758
    val propss = map (map #1) args;
wenzelm@8616
   759
wenzelm@10554
   760
    (*generalize result: context evaluated now, binds added later*)
wenzelm@8616
   761
    val gen = generalize ctxt' ctxt;
wenzelm@10465
   762
    fun gen_binds c = c |> add_binds_i (map (apsnd (Some o gen)) binds);
wenzelm@10465
   763
  in (ctxt' |> add_binds_i (map (apsnd Some) binds), (propss, gen_binds)) end;
wenzelm@8096
   764
wenzelm@10465
   765
in
wenzelm@10465
   766
wenzelm@11925
   767
val read_propp = prep_propp false read_props read_prop_pats;
wenzelm@11925
   768
val cert_propp = prep_propp false cert_props cert_prop_pats;
wenzelm@10554
   769
val read_propp_schematic = prep_propp true read_props read_prop_pats;
wenzelm@10554
   770
val cert_propp_schematic = prep_propp true cert_props cert_prop_pats;
wenzelm@10554
   771
wenzelm@11925
   772
val bind_propp = gen_bind_propp read_propp;
wenzelm@11925
   773
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@11925
   774
val bind_propp_schematic = gen_bind_propp read_propp_schematic;
wenzelm@10554
   775
val bind_propp_schematic_i = gen_bind_propp cert_propp_schematic;
wenzelm@6789
   776
wenzelm@10465
   777
end;
wenzelm@10465
   778
wenzelm@6789
   779
wenzelm@5819
   780
wenzelm@5819
   781
(** theorems **)
wenzelm@5819
   782
wenzelm@6091
   783
(* get_thm(s) *)
wenzelm@5819
   784
wenzelm@9566
   785
(*beware of proper order of evaluation!*)
wenzelm@5819
   786
wenzelm@9566
   787
fun retrieve_thms f g (ctxt as Context {thy, thms, ...}) =
wenzelm@9566
   788
  let
wenzelm@9566
   789
    val sg_ref = Sign.self_ref (Theory.sign_of thy);
wenzelm@9566
   790
    val get_from_thy = f thy;
wenzelm@9566
   791
  in
wenzelm@9566
   792
    fn name =>
wenzelm@9566
   793
      (case Symtab.lookup (thms, name) of
wenzelm@9566
   794
        Some (Some ths) => map (Thm.transfer_sg (Sign.deref sg_ref)) ths
wenzelm@9566
   795
      | _ => get_from_thy name) |> g name
wenzelm@9566
   796
  end;
wenzelm@5819
   797
wenzelm@9566
   798
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   799
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   800
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   801
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   802
wenzelm@5819
   803
wenzelm@6091
   804
(* put_thm(s) *)
wenzelm@5819
   805
wenzelm@7479
   806
fun put_thms ("", _) = I
wenzelm@7479
   807
  | put_thms (name, ths) = map_context
wenzelm@8373
   808
      (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   809
        (thy, data, asms, binds, Symtab.update ((name, Some ths), thms), cases, defs));
wenzelm@5819
   810
wenzelm@6091
   811
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   812
wenzelm@6091
   813
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   814
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   815
wenzelm@5819
   816
wenzelm@7606
   817
(* reset_thms *)
wenzelm@7606
   818
wenzelm@8373
   819
fun reset_thms name = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8373
   820
  (thy, data, asms, binds, Symtab.update ((name, None), thms), cases, defs));
wenzelm@7606
   821
wenzelm@7606
   822
wenzelm@6091
   823
(* have_thmss *)
wenzelm@5819
   824
wenzelm@9196
   825
fun have_thss (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
   826
  let
wenzelm@5819
   827
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   828
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   829
      in (ct', th' :: ths) end
wenzelm@5819
   830
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@9196
   831
    val thms = flat (rev rev_thms);
wenzelm@6091
   832
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   833
wenzelm@9196
   834
fun have_thmss args ctxt = foldl_map have_thss (ctxt, args);
wenzelm@9196
   835
wenzelm@5819
   836
wenzelm@5819
   837
wenzelm@5819
   838
(** assumptions **)
wenzelm@5819
   839
wenzelm@11918
   840
(* basic exporters *)
wenzelm@11918
   841
wenzelm@11918
   842
fun export_assume true = Seq.single oo Drule.implies_intr_goals
wenzelm@11918
   843
  | export_assume false = Seq.single oo Drule.implies_intr_list;
wenzelm@11918
   844
wenzelm@11918
   845
fun export_presume _ = export_assume false;
wenzelm@11918
   846
wenzelm@11918
   847
wenzelm@11918
   848
fun dest_lhs cprop =
wenzelm@11918
   849
  let val x = #1 (Logic.dest_equals (Thm.term_of cprop))
wenzelm@11918
   850
  in Term.dest_Free x; Thm.cterm_of (Thm.sign_of_cterm cprop) x end
wenzelm@11918
   851
  handle TERM _ => raise TERM ("Malformed definitional assumption encountered:\n" ^
wenzelm@11918
   852
      quote (Display.string_of_cterm cprop), []);
wenzelm@11918
   853
wenzelm@11918
   854
fun export_def _ cprops thm =
wenzelm@11918
   855
  thm
wenzelm@11918
   856
  |> Drule.implies_intr_list cprops
wenzelm@11918
   857
  |> Drule.forall_intr_list (map dest_lhs cprops)
wenzelm@11918
   858
  |> Drule.forall_elim_vars 0
wenzelm@11918
   859
  |> RANGE (replicate (length cprops) (Tactic.rtac Drule.reflexive_thm)) 1;
wenzelm@11918
   860
wenzelm@11918
   861
wenzelm@5819
   862
(* assume *)
wenzelm@5819
   863
wenzelm@7270
   864
local
wenzelm@6797
   865
wenzelm@10465
   866
fun add_assm (ctxt, ((name, attrs), props)) =
wenzelm@5819
   867
  let
wenzelm@10465
   868
    val cprops = map (Thm.cterm_of (sign_of ctxt)) props;
wenzelm@11816
   869
    val asms = map (Tactic.norm_hhf o Thm.assume) cprops;
wenzelm@5919
   870
wenzelm@5919
   871
    val ths = map (fn th => ([th], [])) asms;
wenzelm@10465
   872
    val (ctxt', [(_, thms)]) =
wenzelm@10465
   873
      ctxt
wenzelm@6797
   874
      |> auto_bind_facts name props
berghofe@11526
   875
      |> have_thmss [((name, attrs), ths)];
wenzelm@10465
   876
  in (ctxt', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
   877
wenzelm@9470
   878
fun gen_assms prepp exp args ctxt =
wenzelm@9470
   879
  let
wenzelm@10465
   880
    val (ctxt1, propss) = prepp (ctxt, map snd args);
wenzelm@10465
   881
    val (ctxt2, results) = foldl_map add_assm (ctxt1, map fst args ~~ propss);
wenzelm@10465
   882
wenzelm@9470
   883
    val cprops = flat (map #1 results);
wenzelm@9470
   884
    val asmss = map #2 results;
wenzelm@9470
   885
    val thmss = map #3 results;
wenzelm@10465
   886
    val ctxt3 =
wenzelm@10465
   887
      ctxt2
wenzelm@8373
   888
      |> map_context (fn (thy, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@9470
   889
        (thy, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@9470
   890
          cases, defs));
wenzelm@11925
   891
    val ctxt4 = ctxt3 |> put_thms ("prems", prems_of ctxt3);
wenzelm@11925
   892
  in (warn_extra_tfrees ctxt ctxt4, thmss) end;
wenzelm@5819
   893
wenzelm@7270
   894
in
wenzelm@7270
   895
wenzelm@8616
   896
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
   897
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
   898
wenzelm@7270
   899
end;
wenzelm@5819
   900
wenzelm@5819
   901
wenzelm@8096
   902
(* variables *)
wenzelm@8096
   903
wenzelm@10381
   904
local
wenzelm@10381
   905
wenzelm@11925
   906
fun prep_vars prep_typ no_internal (ctxt, (xs, raw_T)) =
wenzelm@8096
   907
  let
wenzelm@11925
   908
    val _ = (case filter (not o Syntax.is_identifier) (map (no_skolem no_internal ctxt) xs) of
wenzelm@8096
   909
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
   910
wenzelm@8096
   911
    val opt_T = apsome (prep_typ ctxt) raw_T;
wenzelm@8096
   912
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@10381
   913
    val ctxt' = ctxt |> predeclare_terms (map (fn x => Free (x, T)) xs);
wenzelm@8096
   914
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
   915
wenzelm@10381
   916
in
wenzelm@10381
   917
wenzelm@11925
   918
val read_vars = prep_vars read_typ true;
wenzelm@11925
   919
val cert_vars = prep_vars cert_typ false;
wenzelm@8096
   920
wenzelm@10381
   921
end;
wenzelm@10381
   922
wenzelm@8096
   923
wenzelm@5819
   924
(* fix *)
wenzelm@5819
   925
wenzelm@8096
   926
local
wenzelm@8096
   927
wenzelm@8373
   928
fun map_vars f = map_context (fn (thy, data, (assumes, vars), binds, thms, cases, defs) =>
wenzelm@8373
   929
  (thy, data, (assumes, f vars), binds, thms, cases, defs));
wenzelm@5819
   930
wenzelm@11925
   931
fun err_dups ctxt xs = raise CONTEXT ("Duplicate variable(s): " ^ commas_quote xs, ctxt);
wenzelm@11925
   932
wenzelm@11925
   933
fun add_vars _ xs (fixes, used) =
wenzelm@11925
   934
  let
wenzelm@11925
   935
    val xs' = variantlist (xs, used);
wenzelm@11925
   936
    val fixes' = (xs ~~ map Syntax.skolem xs') @ fixes;
wenzelm@11925
   937
    val used' = xs' @ used;
wenzelm@11925
   938
  in (fixes', used') end;
wenzelm@11925
   939
wenzelm@11925
   940
fun add_vars_direct ctxt xs (fixes, used) =
wenzelm@11925
   941
  (case xs inter_string map #1 fixes of
wenzelm@11925
   942
    [] => ((xs ~~ xs) @ fixes, xs @ used)
wenzelm@11925
   943
  | dups => err_dups ctxt dups);
wenzelm@11925
   944
wenzelm@11925
   945
fun gen_fix prep add raw_vars ctxt =
wenzelm@8096
   946
  let
wenzelm@8096
   947
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
wenzelm@8096
   948
    val xs = flat (map fst varss);
wenzelm@8096
   949
  in
wenzelm@11925
   950
    (case Library.duplicates xs of [] => () | dups => err_dups ctxt dups);
wenzelm@11925
   951
    ctxt' |> map_vars (add ctxt xs)
wenzelm@8096
   952
  end;
wenzelm@5819
   953
wenzelm@8096
   954
in
wenzelm@7679
   955
wenzelm@11925
   956
val fix = gen_fix read_vars add_vars;
wenzelm@11925
   957
val fix_i = gen_fix cert_vars add_vars;
wenzelm@11925
   958
val fix_direct = gen_fix cert_vars add_vars_direct;
wenzelm@8096
   959
wenzelm@8096
   960
end;
wenzelm@5819
   961
wenzelm@6895
   962
wenzelm@9291
   963
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
   964
fun bind_skolem ctxt xs =
wenzelm@9291
   965
  let
wenzelm@9291
   966
    val ctxt' = ctxt |> fix_i [(xs, None)];
wenzelm@9291
   967
    fun bind (t as Free (x, T)) =
wenzelm@9291
   968
          if x mem_string xs then
wenzelm@10583
   969
            (case lookup_skolem ctxt' x of Some x' => Free (x', T) | None => t)
wenzelm@9291
   970
          else t
wenzelm@9291
   971
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
   972
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
   973
      | bind a = a;
wenzelm@9291
   974
  in bind end;
wenzelm@9291
   975
wenzelm@9291
   976
wenzelm@5819
   977
wenzelm@8373
   978
(** cases **)
wenzelm@8373
   979
wenzelm@11793
   980
fun prep_case ctxt name xs {fixes, assumes, binds} =
wenzelm@11793
   981
  let
wenzelm@11793
   982
    fun replace (opt_x :: xs) ((y, T) :: ys) = (if_none opt_x y, T) :: replace xs ys
wenzelm@11793
   983
      | replace [] ys = ys
wenzelm@11793
   984
      | replace (_ :: _) [] = raise CONTEXT ("Too many parameters for case " ^ quote name, ctxt);
wenzelm@11793
   985
  in
wenzelm@11793
   986
    if null (foldr Term.add_typ_tvars (map snd fixes, [])) andalso
wenzelm@11793
   987
      null (foldr Term.add_term_vars (assumes, [])) then
wenzelm@11793
   988
        {fixes = replace xs fixes, assumes = assumes, binds = map drop_schematic binds}
wenzelm@11793
   989
    else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt)
wenzelm@11793
   990
  end;
wenzelm@8403
   991
wenzelm@11793
   992
fun get_case (ctxt as Context {cases, ...}) name xs =
wenzelm@8426
   993
  (case assoc (cases, name) of
wenzelm@8373
   994
    None => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
wenzelm@11793
   995
  | Some c => prep_case ctxt name xs c);
wenzelm@8373
   996
wenzelm@8384
   997
wenzelm@8373
   998
fun add_cases xs = map_context (fn (thy, data, asms, binds, thms, cases, defs) =>
wenzelm@8426
   999
  (thy, data, asms, binds, thms, rev (filter_out (equal "" o #1) xs) @ cases, defs));
wenzelm@8373
  1000
wenzelm@8373
  1001
wenzelm@8373
  1002
wenzelm@10810
  1003
(** print context information **)
wenzelm@10810
  1004
wenzelm@10810
  1005
val show_hyps = ref false;
wenzelm@10810
  1006
wenzelm@10810
  1007
fun pretty_thm thm =
wenzelm@10810
  1008
  if ! show_hyps then setmp Display.show_hyps true Display.pretty_thm_no_quote thm
wenzelm@10810
  1009
  else Display.pretty_cterm (#prop (Thm.crep_thm thm));
wenzelm@10810
  1010
wenzelm@10810
  1011
val verbose = ref false;
wenzelm@10810
  1012
fun verb f x = if ! verbose then f (x ()) else [];
wenzelm@10810
  1013
fun verb_single x = verb Library.single x;
wenzelm@10810
  1014
wenzelm@10810
  1015
fun setmp_verbose f x = Library.setmp verbose true f x;
wenzelm@10810
  1016
wenzelm@10810
  1017
fun pretty_items prt name items =
wenzelm@10810
  1018
  let
wenzelm@10810
  1019
    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
wenzelm@10810
  1020
      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
wenzelm@10810
  1021
  in
wenzelm@10810
  1022
    if null items andalso not (! verbose) then []
wenzelm@10810
  1023
    else [Pretty.big_list name (map prt_itms items)]
wenzelm@10810
  1024
  end;
wenzelm@10810
  1025
wenzelm@10810
  1026
wenzelm@10810
  1027
(* term bindings *)
wenzelm@10810
  1028
wenzelm@10810
  1029
val smash_option = fn (_, None) => None | (xi, Some b) => Some (xi, b);
wenzelm@10810
  1030
wenzelm@10810
  1031
fun pretty_binds (ctxt as Context {binds, ...}) =
wenzelm@10810
  1032
  let
wenzelm@10810
  1033
    val prt_term = Sign.pretty_term (sign_of ctxt);
wenzelm@10810
  1034
    fun prt_bind (xi, (t, T)) = prt_term (Logic.mk_equals (Var (xi, T), t));
wenzelm@10810
  1035
    val bs = mapfilter smash_option (Vartab.dest binds);
wenzelm@10810
  1036
  in
wenzelm@10810
  1037
    if null bs andalso not (! verbose) then []
wenzelm@10810
  1038
    else [Pretty.big_list "term bindings:" (map prt_bind bs)]
wenzelm@10810
  1039
  end;
wenzelm@10810
  1040
wenzelm@10810
  1041
val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
wenzelm@10810
  1042
wenzelm@10810
  1043
wenzelm@10810
  1044
(* local theorems *)
wenzelm@10810
  1045
wenzelm@10810
  1046
fun pretty_thms (Context {thms, ...}) =
wenzelm@10810
  1047
  pretty_items pretty_thm "facts:" (mapfilter smash_option (Symtab.dest thms));
wenzelm@10810
  1048
wenzelm@10810
  1049
val print_thms = Pretty.writeln o Pretty.chunks o pretty_thms;
wenzelm@10810
  1050
wenzelm@10810
  1051
wenzelm@10810
  1052
(* local contexts *)
wenzelm@10810
  1053
wenzelm@10830
  1054
fun apply_case ({fixes, assumes, binds}: RuleCases.T) ctxt =
wenzelm@10810
  1055
  let
wenzelm@10830
  1056
    fun bind (c, (x, T)) = (c |> fix_i [([x], Some T)], bind_skolem c [x] (Free (x, T)));
wenzelm@10830
  1057
    val (ctxt', xs) = foldl_map bind (ctxt, fixes);
wenzelm@10810
  1058
    fun app t = foldl Term.betapply (t, xs);
wenzelm@10830
  1059
  in (ctxt', (map (apsnd (apsome app)) binds, map app assumes)) end;
wenzelm@10810
  1060
wenzelm@10810
  1061
fun pretty_cases (ctxt as Context {cases, ...}) =
wenzelm@10810
  1062
  let
wenzelm@10810
  1063
    val prt_term = Sign.pretty_term (sign_of ctxt);
wenzelm@10810
  1064
    fun prt_let (xi, t) = Pretty.block
wenzelm@10818
  1065
      [Pretty.quote (prt_term (Var (xi, Term.fastype_of t))), Pretty.str " =", Pretty.brk 1,
wenzelm@10810
  1066
        Pretty.quote (prt_term t)];
wenzelm@10810
  1067
wenzelm@10810
  1068
    fun prt_sect _ _ _ [] = []
wenzelm@10810
  1069
      | prt_sect s sep prt xs = [Pretty.block (Pretty.breaks (Pretty.str s ::
wenzelm@10810
  1070
            flat (Library.separate sep (map (Library.single o prt) xs))))];
wenzelm@10810
  1071
wenzelm@10830
  1072
    fun prt_case (name, (fixes, (lets, asms))) = Pretty.block (Pretty.fbreaks
wenzelm@10810
  1073
      (Pretty.str (name ^ ":") ::
wenzelm@11915
  1074
        prt_sect "fix" [] (Pretty.str o fst) fixes @
wenzelm@10810
  1075
        prt_sect "let" [Pretty.str "and"] prt_let
wenzelm@10810
  1076
          (mapfilter (fn (xi, Some t) => Some (xi, t) | _ => None) lets) @
wenzelm@10810
  1077
        prt_sect "assume" [] (Pretty.quote o prt_term) asms));
wenzelm@10810
  1078
wenzelm@10810
  1079
    val cases' = rev (Library.gen_distinct Library.eq_fst cases);
wenzelm@10810
  1080
  in
wenzelm@10810
  1081
    if null cases andalso not (! verbose) then []
wenzelm@10830
  1082
    else [Pretty.big_list "cases:"
wenzelm@10830
  1083
      (map (prt_case o apsnd (fn c => (#fixes c, #2 (apply_case c ctxt)))) cases')]
wenzelm@10810
  1084
  end;
wenzelm@10810
  1085
wenzelm@10810
  1086
val print_cases = Pretty.writeln o Pretty.chunks o pretty_cases;
wenzelm@10810
  1087
wenzelm@10810
  1088
wenzelm@10810
  1089
(* prems *)
wenzelm@10810
  1090
wenzelm@10810
  1091
val prems_limit = ref 10;
wenzelm@10810
  1092
wenzelm@10810
  1093
fun pretty_prems ctxt =
wenzelm@10810
  1094
  let
wenzelm@10810
  1095
    val limit = ! prems_limit;
wenzelm@10810
  1096
    val prems = prems_of ctxt;
wenzelm@10810
  1097
    val len = length prems;
wenzelm@10810
  1098
    val prt_prems =
wenzelm@10810
  1099
      (if len <= limit then [] else [Pretty.str "..."]) @
wenzelm@10810
  1100
      map pretty_thm (Library.drop (len - limit, prems));
wenzelm@10810
  1101
  in if null prems then [] else [Pretty.big_list "prems:" prt_prems] end;
wenzelm@10810
  1102
wenzelm@10810
  1103
wenzelm@10810
  1104
(* main context *)
wenzelm@10810
  1105
wenzelm@10810
  1106
fun pretty_context (ctxt as Context {asms = (_, (fixes, _)), cases,
wenzelm@10810
  1107
    defs = (types, sorts, (used, _)), ...}) =
wenzelm@10810
  1108
  let
wenzelm@10810
  1109
    val sign = sign_of ctxt;
wenzelm@10810
  1110
wenzelm@10810
  1111
    val prt_term = Sign.pretty_term sign;
wenzelm@10810
  1112
    val prt_typ = Sign.pretty_typ sign;
wenzelm@10810
  1113
    val prt_sort = Sign.pretty_sort sign;
wenzelm@10810
  1114
wenzelm@10810
  1115
    (*theory*)
wenzelm@10810
  1116
    val pretty_thy = Pretty.block [Pretty.str "Theory:", Pretty.brk 1, Sign.pretty_sg sign];
wenzelm@10810
  1117
wenzelm@10810
  1118
    (*fixes*)
wenzelm@10810
  1119
    fun prt_fix (x, x') = Pretty.block
wenzelm@11915
  1120
      [Pretty.str x, Pretty.str " =", Pretty.brk 1, prt_term (Syntax.free x')];
wenzelm@10810
  1121
wenzelm@10810
  1122
    fun prt_fixes [] = []
wenzelm@10810
  1123
      | prt_fixes xs = [Pretty.block (Pretty.str "fixed variables:" :: Pretty.brk 1 ::
wenzelm@10810
  1124
          Pretty.commas (map prt_fix xs))];
wenzelm@10810
  1125
wenzelm@10810
  1126
    (*defaults*)
wenzelm@10810
  1127
    fun prt_atom prt prtT (x, X) = Pretty.block
wenzelm@10810
  1128
      [prt x, Pretty.str " ::", Pretty.brk 1, prtT X];
wenzelm@10810
  1129
wenzelm@10810
  1130
    fun prt_var (x, ~1) = prt_term (Syntax.free x)
wenzelm@10810
  1131
      | prt_var xi = prt_term (Syntax.var xi);
wenzelm@10810
  1132
wenzelm@10810
  1133
    fun prt_varT (x, ~1) = prt_typ (TFree (x, []))
wenzelm@10810
  1134
      | prt_varT xi = prt_typ (TVar (xi, []));
wenzelm@10810
  1135
wenzelm@10810
  1136
    val prt_defT = prt_atom prt_var prt_typ;
wenzelm@10810
  1137
    val prt_defS = prt_atom prt_varT prt_sort;
wenzelm@10810
  1138
  in
wenzelm@10810
  1139
    verb_single (K pretty_thy) @
wenzelm@10810
  1140
    prt_fixes (rev (filter_out (can Syntax.dest_internal o #1) fixes)) @
wenzelm@10810
  1141
    pretty_prems ctxt @
wenzelm@10810
  1142
    verb pretty_binds (K ctxt) @
wenzelm@10810
  1143
    verb pretty_thms (K ctxt) @
wenzelm@10810
  1144
    verb pretty_cases (K ctxt) @
wenzelm@10810
  1145
    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
wenzelm@10810
  1146
    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
wenzelm@10810
  1147
    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
wenzelm@10810
  1148
  end;
wenzelm@10810
  1149
wenzelm@10810
  1150
wenzelm@10810
  1151
wenzelm@5819
  1152
(** theory setup **)
wenzelm@5819
  1153
wenzelm@5819
  1154
val setup = [ProofDataData.init];
wenzelm@5819
  1155
wenzelm@5819
  1156
wenzelm@5819
  1157
end;