src/Pure/Isar/proof_context.ML
author wenzelm
Sat Nov 24 17:00:35 2001 +0100 (2001-11-24 ago)
changeset 12291 43f37745b600
parent 12213 264f17d14ad9
child 12309 03e9287be350
permissions -rw-r--r--
type variables: clarified "used" vs. "occ";
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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 syntax_of: context -> Syntax.syntax * string list * string list
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  val fixed_names_of: context -> string list
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  val assumptions_of: context -> (cterm list * exporter) list
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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 is_fixed: context -> string -> bool
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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: bool -> context -> context -> 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 list -> context -> context
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  val auto_bind_facts: 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 cert_def: context -> term -> string * term
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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 fix_frees: term 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 add_syntax: (string * typ option * mixfix option) list -> context -> context
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  val pretty_term: context -> term -> Pretty.T
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  val pretty_typ: context -> typ -> Pretty.T
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  val pretty_sort: context -> sort -> Pretty.T
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  val pretty_thm: context -> thm -> Pretty.T
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  val pretty_thms: context -> thm list -> Pretty.T
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  val string_of_term: context -> term -> string
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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_syntax: context -> unit
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  val print_binds: context -> unit
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  val print_lthms: 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_asms: 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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    syntax: Syntax.syntax * string list * string list,     (*syntax with structs and mixfixed*)
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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 *                                        (*used type variables*)
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      term list Symtab.table};                             (*type variable occurrences*)
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exception CONTEXT of string * context;
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fun make_context (thy, syntax, data, asms, binds, thms, cases, defs) =
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  Context {thy = thy, syntax = syntax, data = data, asms = asms, binds = binds,
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    thms = thms, cases = cases, defs = defs};
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fun map_context f (Context {thy, syntax, data, asms, binds, thms, cases, defs}) =
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  make_context (f (thy, syntax, 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 syntax_of (Context {syntax, ...}) = syntax;
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fun vars_of (Context {asms = (_, vars), ...}) = vars;
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val fixes_of = #1 o vars_of;
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val fixed_names_of = map #2 o fixes_of;
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fun is_fixed (Context {asms = (_, (fixes, _)), ...}) x = exists (equal x o #2) fixes;
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fun type_occs (Context {defs = (_, _, _, tab), ...}) = tab;
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fun assumptions_of (Context {asms = ((asms, _), _), ...}) = asms;
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fun prems_of (Context {asms = ((_, prems), _), ...}) = flat (map #2 prems);
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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 finish = 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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  map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
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    (thy, syntax, Symtab.update ((Object.name_of_kind kind, f x), data),
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      asms, binds, thms, cases, defs)) ctxt);
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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, (Theory.syn_of thy, [], []), data, (([], []), ([], [])), Vartab.empty,
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      Symtab.empty, [], (Vartab.empty, Vartab.empty, [], Symtab.empty))
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  end;
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(** local syntax **)
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val fixedN = "\\<^fixed>";
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val structN = "\\<^struct>";
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fun the_struct structs i =
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  if 1 <= i andalso i <= length structs then Library.nth_elem (i - 1, structs)
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  else raise ERROR_MESSAGE ("Illegal reference to implicit structure #" ^ string_of_int i);
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(* print (ast) translations *)
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fun index_tr' 1 = Syntax.const "_noindex"
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  | index_tr' i = Syntax.const "_index" $ Syntax.const (Library.string_of_int i);
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fun context_tr' ctxt =
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  let
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    val (_, structs, mixfixed) = syntax_of ctxt;
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    fun tr' (t $ u) = tr' t $ tr' u
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      | tr' (Abs (x, T, t)) = Abs (x, T, tr' t)
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      | tr' (t as Free (x, T)) =
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          let val i = Library.find_index (equal x) structs + 1 in
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            if 1 <= i andalso i <= 9 then Syntax.const "_struct" $ index_tr' i
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            else if x mem_string mixfixed then Const (fixedN ^ x, T)
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            else t
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          end
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      | tr' a = a;
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  in tr' end;
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fun index_ast_tr' structs s =
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  (case Syntax.read_nat s of
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    Some i => Syntax.Variable (the_struct structs i handle ERROR_MESSAGE _ => raise Match)
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  | None => raise Match);
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fun struct_ast_tr' structs [Syntax.Constant "_noindex"] =
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      index_ast_tr' structs "1"
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  | struct_ast_tr' structs [Syntax.Appl [Syntax.Constant "_index", Syntax.Constant s]] =
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      index_ast_tr' structs s
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  | struct_ast_tr' _ _ = raise Match;
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wenzelm@12100
   321
wenzelm@12100
   322
(* parse translations *)
wenzelm@12100
   323
wenzelm@12100
   324
fun fixed_tr x = (fixedN ^ x, curry Term.list_comb (Syntax.free x));
wenzelm@12100
   325
wenzelm@12100
   326
fun index_tr (Const ("_noindex", _)) = 1
wenzelm@12100
   327
  | index_tr (t as (Const ("_index", _) $ Const (s, _))) =
wenzelm@12100
   328
      (case Syntax.read_nat s of Some n => n | None => raise TERM ("index_tr", [t]))
wenzelm@12100
   329
  | index_tr t = raise TERM ("index_tr", [t]);
wenzelm@12100
   330
wenzelm@12100
   331
fun struct_tr structs (idx :: ts) = Syntax.free (the_struct structs (index_tr idx))
wenzelm@12100
   332
  | struct_tr _ ts = raise TERM ("struct_tr", ts);
wenzelm@12100
   333
wenzelm@12093
   334
wenzelm@12093
   335
(* add_syntax and syn_of *)
wenzelm@12093
   336
wenzelm@12093
   337
local
wenzelm@12093
   338
wenzelm@12093
   339
val aT = TFree ("'a", logicS);
wenzelm@12093
   340
wenzelm@12093
   341
fun mixfix x None mx = (fixedN ^ x, replicate (Syntax.mixfix_args mx) aT ---> aT, mx)
wenzelm@12093
   342
  | mixfix x (Some T) mx = (fixedN ^ x, T, mx);
wenzelm@12093
   343
wenzelm@12093
   344
fun prep_mixfix (_, _, None) = None
wenzelm@12093
   345
  | prep_mixfix (x, opt_T, Some mx) = Some (mixfix x opt_T mx);
wenzelm@12093
   346
wenzelm@12093
   347
fun prep_mixfix' (_, _, None) = None
wenzelm@12093
   348
  | prep_mixfix' (x, _, Some Syntax.NoSyn) = None
wenzelm@12093
   349
  | prep_mixfix' (x, opt_T, _) = Some (x, mixfix x opt_T (Syntax.Delimfix x));
wenzelm@12093
   350
wenzelm@12093
   351
fun prep_struct (x, _, None) = Some x
wenzelm@12093
   352
  | prep_struct _ = None;
wenzelm@12093
   353
wenzelm@12093
   354
in
wenzelm@12093
   355
wenzelm@12093
   356
fun add_syntax decls =
wenzelm@12093
   357
  map_context (fn (thy, (syn, structs, mixfixed), data, asms, binds, thms, cases, defs) =>
wenzelm@12093
   358
    let
wenzelm@12093
   359
      val structs' = structs @ mapfilter prep_struct decls;
wenzelm@12093
   360
      val mxs = mapfilter prep_mixfix decls;
wenzelm@12093
   361
      val (fixed, mxs_output) = Library.split_list (mapfilter prep_mixfix' decls);
wenzelm@12093
   362
      val trs = map fixed_tr fixed;
wenzelm@12093
   363
      val syn' = syn
wenzelm@12093
   364
        |> Syntax.extend_const_gram ("", false) mxs_output
wenzelm@12093
   365
        |> Syntax.extend_const_gram ("", true) mxs
wenzelm@12093
   366
        |> Syntax.extend_trfuns ([], trs, [], []);
wenzelm@12093
   367
    in (thy, (syn', structs', fixed @ mixfixed), data, asms, binds, thms, cases, defs) end)
wenzelm@12093
   368
wenzelm@12093
   369
fun syn_of (Context {syntax = (syn, structs, _), ...}) =
wenzelm@12100
   370
  syn |> Syntax.extend_trfuns
wenzelm@12100
   371
    ([], [("_struct", struct_tr structs)], [], [("_struct", struct_ast_tr' structs)]);
wenzelm@12093
   372
wenzelm@12093
   373
end;
wenzelm@12093
   374
wenzelm@12093
   375
wenzelm@12093
   376
wenzelm@7663
   377
(** default sorts and types **)
wenzelm@7663
   378
wenzelm@12291
   379
fun def_sort (Context {defs = (_, sorts, _, _), ...}) xi = Vartab.lookup (sorts, xi);
wenzelm@7663
   380
wenzelm@12291
   381
fun def_type (Context {binds, defs = (types, _, _, _), ...}) is_pat xi =
wenzelm@7663
   382
  (case Vartab.lookup (types, xi) of
wenzelm@7663
   383
    None =>
wenzelm@8616
   384
      if is_pat then None else
wenzelm@8616
   385
        (case Vartab.lookup (binds, xi) of
wenzelm@8616
   386
          Some (Some (_, T)) => Some (TypeInfer.polymorphicT T)
wenzelm@8616
   387
        | _ => None)
wenzelm@7663
   388
  | some => some);
wenzelm@7663
   389
wenzelm@7663
   390
wenzelm@5819
   391
wenzelm@5819
   392
(** prepare types **)
wenzelm@5819
   393
wenzelm@9504
   394
local
wenzelm@9504
   395
wenzelm@9504
   396
fun read_typ_aux read ctxt s =
wenzelm@12093
   397
  transform_error (read (syn_of ctxt) (sign_of ctxt, def_sort ctxt)) s
wenzelm@7663
   398
    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
wenzelm@5819
   399
wenzelm@10554
   400
fun cert_typ_aux cert ctxt raw_T =
wenzelm@10554
   401
  cert (sign_of ctxt) raw_T
wenzelm@10554
   402
    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@9504
   403
wenzelm@9504
   404
in
wenzelm@9504
   405
wenzelm@12072
   406
val read_typ = read_typ_aux Sign.read_typ';
wenzelm@12072
   407
val read_typ_no_norm = read_typ_aux Sign.read_typ_no_norm';
wenzelm@11925
   408
val cert_typ = cert_typ_aux Sign.certify_typ;
wenzelm@9504
   409
val cert_typ_no_norm = cert_typ_aux Sign.certify_typ_no_norm;
wenzelm@9504
   410
wenzelm@9504
   411
end;
wenzelm@9504
   412
wenzelm@5819
   413
wenzelm@7679
   414
(* internalize Skolem constants *)
wenzelm@7679
   415
wenzelm@10583
   416
fun lookup_skolem ctxt x = assoc (fixes_of ctxt, x);
wenzelm@10583
   417
fun get_skolem ctxt x = if_none (lookup_skolem ctxt x) x;
wenzelm@7679
   418
wenzelm@9325
   419
fun no_skolem no_internal ctxt x =
wenzelm@9291
   420
  if can Syntax.dest_skolem x then
wenzelm@7679
   421
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@9325
   422
  else if no_internal andalso can Syntax.dest_internal x then
wenzelm@9291
   423
    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
wenzelm@7679
   424
  else x;
wenzelm@7679
   425
wenzelm@9291
   426
fun intern_skolem ctxt =
wenzelm@7679
   427
  let
wenzelm@7679
   428
    fun intern (t as Free (x, T)) =
wenzelm@10583
   429
          (case lookup_skolem ctxt (no_skolem true ctxt x) of
wenzelm@7679
   430
            Some x' => Free (x', T)
wenzelm@7679
   431
          | None => t)
wenzelm@7679
   432
      | intern (t $ u) = intern t $ intern u
wenzelm@7679
   433
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@7679
   434
      | intern a = a;
wenzelm@7679
   435
  in intern end;
wenzelm@7679
   436
wenzelm@7679
   437
wenzelm@9133
   438
(* externalize Skolem constants -- for printing purposes only *)
wenzelm@9133
   439
wenzelm@9133
   440
fun extern_skolem ctxt =
wenzelm@9133
   441
  let
wenzelm@9133
   442
    val rev_fixes = map Library.swap (fixes_of ctxt);
wenzelm@9133
   443
wenzelm@9133
   444
    fun extern (t as Free (x, T)) =
wenzelm@9133
   445
          (case assoc (rev_fixes, x) of
wenzelm@10583
   446
            Some x' => Free (if lookup_skolem ctxt x' = Some x then x' else NameSpace.hidden x', T)
wenzelm@9133
   447
          | None => t)
wenzelm@9133
   448
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   449
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   450
      | extern a = a;
wenzelm@9133
   451
  in extern end
wenzelm@9133
   452
wenzelm@8096
   453
wenzelm@5819
   454
(** prepare terms and propositions **)
wenzelm@5819
   455
wenzelm@5819
   456
(*
wenzelm@5819
   457
  (1) read / certify wrt. signature of context
wenzelm@5819
   458
  (2) intern Skolem constants
wenzelm@5819
   459
  (3) expand term bindings
wenzelm@5819
   460
*)
wenzelm@5819
   461
wenzelm@5819
   462
wenzelm@5819
   463
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   464
wenzelm@12072
   465
fun read_def_termTs freeze syn sg (types, sorts, used) sTs =
wenzelm@12072
   466
  Sign.read_def_terms' syn (sg, types, sorts) used freeze sTs;
wenzelm@5874
   467
wenzelm@12072
   468
fun read_def_termT freeze syn sg defs sT = apfst hd (read_def_termTs freeze syn sg defs [sT]);
wenzelm@5874
   469
wenzelm@12072
   470
fun read_term_sg freeze syn sg defs s =
wenzelm@12072
   471
  #1 (read_def_termT freeze syn sg defs (s, TypeInfer.logicT));
wenzelm@12072
   472
wenzelm@12072
   473
fun read_prop_sg freeze syn sg defs s = #1 (read_def_termT freeze syn sg defs (s, propT));
wenzelm@12072
   474
wenzelm@12072
   475
fun read_terms_sg freeze syn sg defs =
wenzelm@12072
   476
  #1 o read_def_termTs freeze syn sg defs o map (rpair TypeInfer.logicT);
wenzelm@12072
   477
wenzelm@12072
   478
fun read_props_sg freeze syn sg defs = #1 o read_def_termTs freeze syn sg defs o map (rpair propT);
wenzelm@5819
   479
wenzelm@5819
   480
wenzelm@5819
   481
fun cert_term_sg sg t = Thm.term_of (Thm.cterm_of sg t);
wenzelm@5819
   482
wenzelm@5819
   483
fun cert_prop_sg sg tm =
wenzelm@5819
   484
  let
wenzelm@5819
   485
    val ctm = Thm.cterm_of sg tm;
wenzelm@5819
   486
    val {t, T, ...} = Thm.rep_cterm ctm;
wenzelm@10465
   487
  in if T = propT then t else raise TERM ("Term not of type prop", [t]) end;
wenzelm@5819
   488
wenzelm@5819
   489
wenzelm@5819
   490
(* norm_term *)
wenzelm@5819
   491
wenzelm@5819
   492
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   493
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   494
wenzelm@8616
   495
fun unifyT ctxt (T, U) =
wenzelm@8616
   496
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@8616
   497
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) maxidx Vartab.empty (T, U)) end;
wenzelm@8616
   498
wenzelm@10554
   499
fun norm_term (ctxt as Context {binds, ...}) schematic =
wenzelm@5819
   500
  let
wenzelm@5819
   501
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   502
    exception SAME;
wenzelm@5819
   503
wenzelm@5819
   504
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   505
          (case Vartab.lookup (binds, xi) of
wenzelm@7606
   506
            Some (Some (u, U)) =>
wenzelm@8616
   507
              let
wenzelm@8616
   508
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
wenzelm@8616
   509
                  raise TYPE ("norm_term: ill-typed variable assigment", [T, U], [t, u]);
wenzelm@8616
   510
                val u' = Term.subst_TVars_Vartab env u;
wenzelm@8616
   511
              in norm u' handle SAME => u' end
wenzelm@10554
   512
          | _ =>
wenzelm@10554
   513
            if schematic then raise SAME
wenzelm@10554
   514
            else raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   515
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   516
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   517
      | norm (f $ t) =
wenzelm@5819
   518
          ((case norm f of
wenzelm@5819
   519
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   520
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   521
      | norm _ =  raise SAME
wenzelm@5819
   522
    and normh t = norm t handle SAME => t
wenzelm@5819
   523
  in normh end;
wenzelm@5819
   524
wenzelm@5819
   525
wenzelm@6550
   526
(* dummy patterns *)
wenzelm@6550
   527
wenzelm@9540
   528
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   529
wenzelm@9540
   530
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   531
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   532
wenzelm@6550
   533
wenzelm@5819
   534
(* read terms *)
wenzelm@5819
   535
wenzelm@10554
   536
local
wenzelm@10554
   537
wenzelm@12291
   538
fun gen_read read app is_pat schematic (ctxt as Context {defs = (_, _, used, _), ...}) s =
wenzelm@12093
   539
  (transform_error (read (syn_of ctxt)
wenzelm@12072
   540
      (sign_of ctxt) (def_type ctxt is_pat, def_sort ctxt, used)) s
wenzelm@7663
   541
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@7663
   542
    | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@9291
   543
  |> app (intern_skolem ctxt)
wenzelm@10554
   544
  |> app (if is_pat then I else norm_term ctxt schematic)
wenzelm@7663
   545
  |> app (if is_pat then prepare_dummies else (reject_dummies ctxt));
wenzelm@5819
   546
wenzelm@10554
   547
in
wenzelm@10554
   548
wenzelm@10554
   549
val read_termTs = gen_read (read_def_termTs false) (apfst o map) false false;
wenzelm@10554
   550
val read_termT_pats = #1 oo gen_read (read_def_termTs false) (apfst o map) true false;
wenzelm@8096
   551
wenzelm@8096
   552
fun read_term_pats T ctxt pats = read_termT_pats ctxt (map (rpair T) pats);
wenzelm@8096
   553
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   554
wenzelm@10554
   555
val read_term = gen_read (read_term_sg true) I false false;
wenzelm@10554
   556
val read_prop = gen_read (read_prop_sg true) I false false;
wenzelm@11925
   557
val read_prop_schematic = gen_read (read_prop_sg true) I false true;
wenzelm@10554
   558
val read_terms = gen_read (read_terms_sg true) map false false;
wenzelm@10465
   559
val read_props = gen_read (read_props_sg true) map false;
wenzelm@5819
   560
wenzelm@10554
   561
end;
wenzelm@10554
   562
wenzelm@5819
   563
wenzelm@5819
   564
(* certify terms *)
wenzelm@5819
   565
wenzelm@10554
   566
local
wenzelm@10554
   567
wenzelm@10554
   568
fun gen_cert cert is_pat schematic ctxt t = t
wenzelm@10554
   569
  |> (if is_pat then I else norm_term ctxt schematic)
wenzelm@8616
   570
  |> (fn t' => cert (sign_of ctxt) t' handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   571
wenzelm@10554
   572
in
wenzelm@8096
   573
wenzelm@10554
   574
val cert_term = gen_cert cert_term_sg false false;
wenzelm@10554
   575
val cert_prop = gen_cert cert_prop_sg false false;
wenzelm@10554
   576
val cert_props = map oo gen_cert cert_prop_sg false;
wenzelm@10554
   577
wenzelm@10554
   578
fun cert_term_pats _ = map o gen_cert cert_term_sg true false;
wenzelm@10554
   579
val cert_prop_pats = map o gen_cert cert_prop_sg true false;
wenzelm@10554
   580
wenzelm@10554
   581
end;
wenzelm@5819
   582
wenzelm@5819
   583
wenzelm@5819
   584
(* declare terms *)
wenzelm@5819
   585
wenzelm@10381
   586
local
wenzelm@10381
   587
wenzelm@5819
   588
val ins_types = foldl_aterms
wenzelm@5819
   589
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   590
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   591
    | (types, _) => types);
wenzelm@5819
   592
wenzelm@5819
   593
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   594
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   595
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   596
    | (sorts, _) => sorts));
wenzelm@5819
   597
wenzelm@8616
   598
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@12291
   599
  (fn (used, TFree (x, _)) => x ins_string used | (used, _) => used));
wenzelm@12291
   600
wenzelm@12291
   601
val ins_occs = foldl_term_types (fn t => foldl_atyps
wenzelm@12291
   602
  (fn (tab, TFree (x, _)) => Symtab.update_multi ((x, t), tab) | (tab, _) => tab));
wenzelm@5819
   603
wenzelm@7663
   604
fun ins_skolem def_ty = foldr
wenzelm@5994
   605
  (fn ((x, x'), types) =>
wenzelm@7663
   606
    (case def_ty x' of
wenzelm@5994
   607
      Some T => Vartab.update (((x, ~1), T), types)
wenzelm@5994
   608
    | None => types));
wenzelm@5994
   609
wenzelm@12072
   610
fun map_defaults f = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
   611
  (thy, syntax, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   612
wenzelm@10381
   613
fun declare_syn (ctxt, t) =
wenzelm@5819
   614
  ctxt
wenzelm@12291
   615
  |> map_defaults (fn (types, sorts, used, occ) => (ins_types (types, t), sorts, used, occ))
wenzelm@12291
   616
  |> map_defaults (fn (types, sorts, used, occ) => (types, ins_sorts (sorts, t), used, occ))
wenzelm@12291
   617
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, ins_used (used, t), occ));
wenzelm@10381
   618
wenzelm@10381
   619
fun declare_occ (ctxt as Context {asms = (_, (fixes, _)), ...}, t) =
wenzelm@10381
   620
  declare_syn (ctxt, t)
wenzelm@12291
   621
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, used, ins_occs (occ, t)))
wenzelm@12291
   622
  |> map_defaults (fn (types, sorts, used, occ) =>
wenzelm@12291
   623
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) (fixes, types), sorts, used, occ));
wenzelm@5819
   624
wenzelm@10381
   625
in
wenzelm@5819
   626
wenzelm@10381
   627
fun declare_term t ctxt = declare_occ (ctxt, t);
wenzelm@10381
   628
fun declare_terms ts ctxt = foldl declare_occ (ctxt, ts);
wenzelm@12130
   629
fun declare_terms_syntax ts ctxt = foldl declare_syn (ctxt, ts);
wenzelm@10381
   630
wenzelm@10381
   631
end;
wenzelm@5819
   632
wenzelm@5819
   633
wenzelm@8616
   634
wenzelm@12072
   635
(** pretty printing **)
wenzelm@12072
   636
wenzelm@12093
   637
fun pretty_term ctxt = Sign.pretty_term' (syn_of ctxt) (sign_of ctxt) o context_tr' ctxt;
wenzelm@12057
   638
val pretty_typ = Sign.pretty_typ o sign_of;
wenzelm@12057
   639
val pretty_sort = Sign.pretty_sort o sign_of;
wenzelm@12057
   640
wenzelm@12057
   641
val string_of_term = Pretty.string_of oo pretty_term;
wenzelm@12057
   642
wenzelm@12057
   643
val show_hyps = ref false;
wenzelm@12057
   644
wenzelm@12057
   645
fun pretty_thm ctxt thm =
wenzelm@12072
   646
  if ! show_hyps then setmp Display.show_hyps true (fn () =>
wenzelm@12086
   647
    Display.pretty_thm_aux (pretty_sort ctxt, pretty_term ctxt) false thm) ()
wenzelm@12057
   648
  else pretty_term ctxt (#prop (Thm.rep_thm thm));
wenzelm@12057
   649
wenzelm@12057
   650
fun pretty_thms ctxt [th] = pretty_thm ctxt th
wenzelm@12057
   651
  | pretty_thms ctxt ths = Pretty.blk (0, Pretty.fbreaks (map (pretty_thm ctxt) ths));
wenzelm@12057
   652
wenzelm@12057
   653
wenzelm@12057
   654
wenzelm@8616
   655
(** Hindley-Milner polymorphism **)
wenzelm@8616
   656
wenzelm@7925
   657
(* warn_extra_tfrees *)
wenzelm@7925
   658
wenzelm@12130
   659
fun warn_extra_tfrees
wenzelm@12291
   660
    (ctxt1 as Context {defs = (_, _, _, occ1), ...})
wenzelm@12291
   661
    (ctxt2 as Context {defs = (_, _, _, occ2), ...}) =
wenzelm@12130
   662
  let
wenzelm@12130
   663
    fun known_tfree a (Type (_, Ts)) = exists (known_tfree a) Ts
wenzelm@12130
   664
      | known_tfree a (TFree (a', _)) = a = a'
wenzelm@12130
   665
      | known_tfree _ _ = false;
wenzelm@8616
   666
wenzelm@12130
   667
    val extras =
wenzelm@12291
   668
      Library.gen_rems Library.eq_fst (Symtab.dest occ2, Symtab.dest occ1)
wenzelm@12130
   669
      |> map (fn (a, ts) => map (pair a) (mapfilter (try (#1 o Term.dest_Free)) ts)) |> flat
wenzelm@12130
   670
      |> mapfilter (fn (a, x) =>
wenzelm@12130
   671
          (case def_type ctxt1 false (x, ~1) of None => Some (a, x)
wenzelm@12130
   672
          | Some T => if known_tfree a T then None else Some (a, x)));
wenzelm@12130
   673
    val tfrees = map #1 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   674
    val frees = map #2 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   675
  in
wenzelm@12130
   676
    if null extras then ()
wenzelm@12130
   677
    else warning ("Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@12130
   678
      space_implode " or " frees);
wenzelm@12130
   679
    ctxt2
wenzelm@12130
   680
  end;
wenzelm@8616
   681
wenzelm@8616
   682
wenzelm@8616
   683
(* generalize type variables *)
wenzelm@8616
   684
wenzelm@12008
   685
fun gen_tfrees inner outer =
wenzelm@8616
   686
  let
wenzelm@12057
   687
    val extra_fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@8616
   688
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   689
      | still_fixed _ = false;
wenzelm@8616
   690
    fun add (gen, (a, xs)) =
wenzelm@12291
   691
      if is_some (Symtab.lookup (type_occs outer, a)) orelse exists still_fixed xs
wenzelm@8616
   692
      then gen else a :: gen;
wenzelm@12291
   693
  in Symtab.foldl add ([], type_occs inner) end;
wenzelm@8616
   694
wenzelm@8616
   695
fun generalizeT inner outer =
wenzelm@8616
   696
  let
wenzelm@12008
   697
    val tfrees = gen_tfrees inner outer;
wenzelm@8616
   698
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@8616
   699
  in Term.map_type_tfree gen end;
wenzelm@8616
   700
wenzelm@8616
   701
val generalize = Term.map_term_types oo generalizeT;
wenzelm@8616
   702
wenzelm@8616
   703
wenzelm@9553
   704
wenzelm@9553
   705
(** export theorems **)
wenzelm@8616
   706
wenzelm@8616
   707
fun get_free x (None, t as Free (y, _)) = if x = y then Some t else None
wenzelm@8616
   708
  | get_free _ (opt, _) = opt;
wenzelm@8616
   709
wenzelm@8616
   710
fun find_free t x = foldl_aterms (get_free x) (None, t);
wenzelm@8616
   711
wenzelm@12008
   712
fun export is_goal inner outer =
wenzelm@8616
   713
  let
wenzelm@12008
   714
    val tfrees = gen_tfrees inner outer;
wenzelm@12057
   715
    val fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@12057
   716
    val asms = Library.drop (length (assumptions_of outer), assumptions_of inner);
wenzelm@11816
   717
    val exp_asms = map (fn (cprops, exp) => exp is_goal cprops) asms;
wenzelm@11816
   718
  in fn thm =>
wenzelm@11816
   719
    thm
wenzelm@11816
   720
    |> Tactic.norm_hhf
wenzelm@11816
   721
    |> Seq.EVERY (rev exp_asms)
wenzelm@11816
   722
    |> Seq.map (fn rule =>
wenzelm@11816
   723
      let
wenzelm@11816
   724
        val {sign, prop, ...} = Thm.rep_thm rule;
wenzelm@11816
   725
        val frees = map (Thm.cterm_of sign) (mapfilter (find_free prop) fixes);
wenzelm@11816
   726
      in
wenzelm@11816
   727
        rule
wenzelm@11816
   728
        |> Drule.forall_intr_list frees
wenzelm@11816
   729
        |> Tactic.norm_hhf
wenzelm@11816
   730
        |> Drule.tvars_intr_list tfrees
wenzelm@11816
   731
      end)
wenzelm@11816
   732
  end;
wenzelm@8616
   733
wenzelm@7925
   734
wenzelm@5819
   735
wenzelm@5819
   736
(** bindings **)
wenzelm@5819
   737
wenzelm@5819
   738
(* update_binds *)
wenzelm@5819
   739
wenzelm@7606
   740
fun del_bind (ctxt, xi) =
wenzelm@7606
   741
  ctxt
wenzelm@12072
   742
  |> map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
   743
      (thy, syntax, data, asms, Vartab.update ((xi, None), binds), thms, cases, defs));
wenzelm@7606
   744
wenzelm@8616
   745
fun upd_bind (ctxt, ((x, i), t)) =
wenzelm@8616
   746
  let
wenzelm@8616
   747
    val T = Term.fastype_of t;
wenzelm@8616
   748
    val t' =
wenzelm@8616
   749
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   750
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   751
  in
wenzelm@5819
   752
    ctxt
wenzelm@8616
   753
    |> declare_term t'
wenzelm@12072
   754
    |> map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
   755
      (thy, syntax, data, asms, Vartab.update (((x, i), Some (t', T)), binds), thms, cases, defs))
wenzelm@5819
   756
  end;
wenzelm@5819
   757
wenzelm@7606
   758
fun del_upd_bind (ctxt, (xi, None)) = del_bind (ctxt, xi)
wenzelm@7606
   759
  | del_upd_bind (ctxt, (xi, Some t)) = upd_bind (ctxt, (xi, t));
wenzelm@7606
   760
wenzelm@5819
   761
fun update_binds bs ctxt = foldl upd_bind (ctxt, bs);
wenzelm@7606
   762
fun delete_update_binds bs ctxt = foldl del_upd_bind (ctxt, bs);
wenzelm@7606
   763
wenzelm@5819
   764
wenzelm@8096
   765
(* simult_matches *)
wenzelm@8096
   766
wenzelm@10554
   767
local
wenzelm@10554
   768
wenzelm@10554
   769
val add_vars = Term.foldl_aterms (fn (vs, Var (xi, _)) => xi ins vs | (vs, _) => vs);
wenzelm@10554
   770
fun vars_of ts = foldl add_vars ([], ts);
wenzelm@10554
   771
wenzelm@10554
   772
in
wenzelm@10554
   773
wenzelm@8616
   774
fun simult_matches ctxt [] = []
wenzelm@8616
   775
  | simult_matches ctxt pairs =
wenzelm@8096
   776
      let
wenzelm@10554
   777
        fun fail () = raise CONTEXT ("Pattern match failed!", ctxt);
wenzelm@10554
   778
wenzelm@8096
   779
        val maxidx = foldl (fn (i, (t1, t2)) =>
wenzelm@8096
   780
          Int.max (i, Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2))) (~1, pairs);
wenzelm@10554
   781
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx,
wenzelm@10554
   782
          map swap pairs);    (*prefer assignment of variables from patterns*)
wenzelm@10554
   783
        val env =
wenzelm@8096
   784
          (case Seq.pull envs of
wenzelm@10554
   785
            None => fail ()
wenzelm@10554
   786
          | Some (env, _) => env);    (*ignore further results*)
wenzelm@10554
   787
        val domain = filter_out Term.is_replaced_dummy_pattern (vars_of (map #1 pairs));
wenzelm@10554
   788
        val _ =    (*may not assign variables from text*)
wenzelm@10554
   789
          if null (map #1 (Envir.alist_of env) inter vars_of (map #2 pairs)) then ()
wenzelm@10554
   790
          else fail ();
wenzelm@10465
   791
        fun norm_bind (xi, t) = if xi mem domain then Some (xi, Envir.norm_term env t) else None;
wenzelm@10465
   792
      in mapfilter norm_bind (Envir.alist_of env) end;
wenzelm@8096
   793
wenzelm@10554
   794
end;
wenzelm@10554
   795
wenzelm@8096
   796
wenzelm@8096
   797
(* add_binds(_i) *)
wenzelm@5819
   798
wenzelm@7925
   799
local
wenzelm@7925
   800
wenzelm@5819
   801
fun gen_bind prep (ctxt, (xi as (x, _), raw_t)) =
wenzelm@7606
   802
  ctxt |> delete_update_binds [(xi, apsome (prep ctxt) raw_t)];
wenzelm@5819
   803
wenzelm@8616
   804
fun gen_binds prep binds ctxt = foldl (gen_bind prep) (ctxt, binds);
wenzelm@7925
   805
wenzelm@10810
   806
in
wenzelm@10810
   807
wenzelm@10554
   808
fun drop_schematic (b as (xi, Some t)) = if null (Term.term_vars t) then b else (xi, None)
wenzelm@10554
   809
  | drop_schematic b = b;
wenzelm@10554
   810
wenzelm@5819
   811
val add_binds = gen_binds read_term;
wenzelm@5819
   812
val add_binds_i = gen_binds cert_term;
wenzelm@8616
   813
wenzelm@12147
   814
fun auto_bind f ts ctxt = ctxt |> add_binds_i (map drop_schematic (f (sign_of ctxt) ts));
wenzelm@12147
   815
val auto_bind_goal = auto_bind AutoBind.goal;
wenzelm@12147
   816
val auto_bind_facts = auto_bind AutoBind.facts;
wenzelm@7925
   817
wenzelm@7925
   818
end;
wenzelm@5819
   819
wenzelm@5819
   820
wenzelm@8096
   821
(* match_bind(_i) *)
wenzelm@5819
   822
wenzelm@8096
   823
local
wenzelm@8096
   824
wenzelm@10465
   825
fun prep_bind prep_pats (ctxt, (raw_pats, t)) =
wenzelm@5819
   826
  let
wenzelm@8096
   827
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   828
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   829
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   830
  in (ctxt', binds) end;
wenzelm@7670
   831
wenzelm@10465
   832
fun gen_binds prep_terms prep_pats gen raw_binds ctxt =
wenzelm@8616
   833
  let
wenzelm@10465
   834
    val ts = prep_terms ctxt (map snd raw_binds);
wenzelm@10465
   835
    val (ctxt', binds) =
wenzelm@10465
   836
      apsnd flat (foldl_map (prep_bind prep_pats) (ctxt, map fst raw_binds ~~ ts));
wenzelm@8616
   837
    val binds' =
wenzelm@8616
   838
      if gen then map (apsnd (generalize ctxt' ctxt)) binds
wenzelm@8616
   839
      else binds;
wenzelm@8616
   840
    val binds'' = map (apsnd Some) binds';
wenzelm@8616
   841
  in
wenzelm@8616
   842
    warn_extra_tfrees ctxt
wenzelm@8616
   843
     (if gen then ctxt (*sic!*) |> declare_terms (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   844
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   845
  end;
wenzelm@8096
   846
wenzelm@8096
   847
in
wenzelm@5935
   848
wenzelm@10465
   849
val match_bind = gen_binds read_terms read_term_pats;
wenzelm@10465
   850
val match_bind_i = gen_binds (map o cert_term) cert_term_pats;
wenzelm@8096
   851
wenzelm@8096
   852
end;
wenzelm@5935
   853
wenzelm@5935
   854
wenzelm@10465
   855
(* propositions with patterns *)
wenzelm@5935
   856
wenzelm@10465
   857
local
wenzelm@8096
   858
wenzelm@10554
   859
fun prep_propp schematic prep_props prep_pats (context, args) =
wenzelm@10465
   860
  let
wenzelm@10465
   861
    fun prep ((ctxt, prop :: props), (_, (raw_pats1, raw_pats2))) =
wenzelm@10465
   862
          let
wenzelm@10465
   863
            val ctxt' = declare_term prop ctxt;
wenzelm@10465
   864
            val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@10465
   865
            val len1 = length raw_pats1;
wenzelm@10465
   866
          in ((ctxt', props), (prop, (take (len1, pats), drop (len1, pats)))) end
wenzelm@10465
   867
      | prep _ = sys_error "prep_propp";
wenzelm@10465
   868
    val ((context', _), propp) = foldl_map (foldl_map prep)
wenzelm@10554
   869
        ((context, prep_props schematic context (flat (map (map fst) args))), args);
wenzelm@10465
   870
  in (context', propp) end;
wenzelm@5935
   871
wenzelm@10465
   872
fun matches ctxt (prop, (pats1, pats2)) =
wenzelm@10465
   873
  simult_matches ctxt (map (rpair prop) pats1 @ map (rpair (Logic.strip_imp_concl prop)) pats2);
wenzelm@8096
   874
wenzelm@10465
   875
fun gen_bind_propp prepp (ctxt, raw_args) =
wenzelm@8096
   876
  let
wenzelm@10465
   877
    val (ctxt', args) = prepp (ctxt, raw_args);
wenzelm@10465
   878
    val binds = flat (flat (map (map (matches ctxt')) args));
wenzelm@10465
   879
    val propss = map (map #1) args;
wenzelm@8616
   880
wenzelm@10554
   881
    (*generalize result: context evaluated now, binds added later*)
wenzelm@8616
   882
    val gen = generalize ctxt' ctxt;
wenzelm@10465
   883
    fun gen_binds c = c |> add_binds_i (map (apsnd (Some o gen)) binds);
wenzelm@10465
   884
  in (ctxt' |> add_binds_i (map (apsnd Some) binds), (propss, gen_binds)) end;
wenzelm@8096
   885
wenzelm@10465
   886
in
wenzelm@10465
   887
wenzelm@11925
   888
val read_propp = prep_propp false read_props read_prop_pats;
wenzelm@11925
   889
val cert_propp = prep_propp false cert_props cert_prop_pats;
wenzelm@10554
   890
val read_propp_schematic = prep_propp true read_props read_prop_pats;
wenzelm@10554
   891
val cert_propp_schematic = prep_propp true cert_props cert_prop_pats;
wenzelm@10554
   892
wenzelm@11925
   893
val bind_propp = gen_bind_propp read_propp;
wenzelm@11925
   894
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@11925
   895
val bind_propp_schematic = gen_bind_propp read_propp_schematic;
wenzelm@10554
   896
val bind_propp_schematic_i = gen_bind_propp cert_propp_schematic;
wenzelm@6789
   897
wenzelm@10465
   898
end;
wenzelm@10465
   899
wenzelm@6789
   900
wenzelm@5819
   901
wenzelm@5819
   902
(** theorems **)
wenzelm@5819
   903
wenzelm@6091
   904
(* get_thm(s) *)
wenzelm@5819
   905
wenzelm@9566
   906
(*beware of proper order of evaluation!*)
wenzelm@5819
   907
wenzelm@9566
   908
fun retrieve_thms f g (ctxt as Context {thy, thms, ...}) =
wenzelm@9566
   909
  let
wenzelm@9566
   910
    val sg_ref = Sign.self_ref (Theory.sign_of thy);
wenzelm@9566
   911
    val get_from_thy = f thy;
wenzelm@9566
   912
  in
wenzelm@9566
   913
    fn name =>
wenzelm@9566
   914
      (case Symtab.lookup (thms, name) of
wenzelm@9566
   915
        Some (Some ths) => map (Thm.transfer_sg (Sign.deref sg_ref)) ths
wenzelm@9566
   916
      | _ => get_from_thy name) |> g name
wenzelm@9566
   917
  end;
wenzelm@5819
   918
wenzelm@9566
   919
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   920
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   921
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   922
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   923
wenzelm@5819
   924
wenzelm@6091
   925
(* put_thm(s) *)
wenzelm@5819
   926
wenzelm@7479
   927
fun put_thms ("", _) = I
wenzelm@7479
   928
  | put_thms (name, ths) = map_context
wenzelm@12072
   929
      (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
   930
        (thy, syntax, data, asms, binds, Symtab.update ((name, Some ths), thms), cases, defs));
wenzelm@5819
   931
wenzelm@6091
   932
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@5819
   933
wenzelm@6091
   934
fun put_thmss [] ctxt = ctxt
wenzelm@6091
   935
  | put_thmss (th :: ths) ctxt = ctxt |> put_thms th |> put_thmss ths;
wenzelm@5819
   936
wenzelm@5819
   937
wenzelm@7606
   938
(* reset_thms *)
wenzelm@7606
   939
wenzelm@12072
   940
fun reset_thms name = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
   941
  (thy, syntax, data, asms, binds, Symtab.update ((name, None), thms), cases, defs));
wenzelm@7606
   942
wenzelm@7606
   943
wenzelm@6091
   944
(* have_thmss *)
wenzelm@5819
   945
wenzelm@9196
   946
fun have_thss (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
   947
  let
wenzelm@5819
   948
    fun app ((ct, ths), (th, attrs)) =
wenzelm@6091
   949
      let val (ct', th') = Thm.applys_attributes ((ct, th), attrs @ more_attrs)
wenzelm@5819
   950
      in (ct', th' :: ths) end
wenzelm@5819
   951
    val (ctxt', rev_thms) = foldl app ((ctxt, []), ths_attrs);
wenzelm@9196
   952
    val thms = flat (rev rev_thms);
wenzelm@6091
   953
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
   954
wenzelm@9196
   955
fun have_thmss args ctxt = foldl_map have_thss (ctxt, args);
wenzelm@9196
   956
wenzelm@5819
   957
wenzelm@5819
   958
wenzelm@5819
   959
(** assumptions **)
wenzelm@5819
   960
wenzelm@11918
   961
(* basic exporters *)
wenzelm@11918
   962
wenzelm@11918
   963
fun export_assume true = Seq.single oo Drule.implies_intr_goals
wenzelm@11918
   964
  | export_assume false = Seq.single oo Drule.implies_intr_list;
wenzelm@11918
   965
wenzelm@11918
   966
fun export_presume _ = export_assume false;
wenzelm@11918
   967
wenzelm@11918
   968
wenzelm@12057
   969
(* defs *)
wenzelm@12057
   970
wenzelm@12066
   971
fun cert_def ctxt eq =
wenzelm@12016
   972
  let
wenzelm@12057
   973
    fun err msg = raise CONTEXT (msg ^
wenzelm@12057
   974
      "\nThe error(s) above occurred in local definition: " ^ string_of_term ctxt eq, ctxt);
wenzelm@12057
   975
    val (lhs, rhs) = Logic.dest_equals (Term.strip_all_body eq)
wenzelm@12057
   976
      handle TERM _ => err "Not a meta-equality (==)";
wenzelm@12086
   977
    val (f, xs) = Term.strip_comb lhs;
wenzelm@12086
   978
    val (c, _) = Term.dest_Free f handle TERM _ =>
wenzelm@12086
   979
      err "Head of lhs must be free or fixed variable";
wenzelm@12057
   980
wenzelm@12086
   981
    fun is_free (Free (x, _)) = not (is_fixed ctxt x)
wenzelm@12086
   982
      | is_free _ = false;
wenzelm@12086
   983
    val extra_frees = filter is_free (term_frees rhs) \\ xs;
wenzelm@12016
   984
  in
wenzelm@12086
   985
    conditional (not (forall (is_Bound orf is_free) xs andalso null (duplicates xs))) (fn () =>
wenzelm@12086
   986
      err "Arguments of lhs must be distinct free or fixed variables");
wenzelm@12086
   987
    conditional (f mem Term.term_frees rhs) (fn () =>
wenzelm@12086
   988
      err "Element to be defined occurs on rhs");
wenzelm@12086
   989
    conditional (not (null extra_frees)) (fn () =>
wenzelm@12086
   990
      err ("Extra free variables on rhs: " ^ commas_quote (map (#1 o dest_Free) extra_frees)));
wenzelm@12086
   991
    (c, Term.list_all_free (mapfilter (try Term.dest_Free) xs, eq))
wenzelm@12057
   992
  end;
wenzelm@12057
   993
wenzelm@12057
   994
fun head_of_def cprop =
wenzelm@12057
   995
  #1 (Term.strip_comb (#1 (Logic.dest_equals (Term.strip_all_body (Thm.term_of cprop)))))
wenzelm@12057
   996
  |> Thm.cterm_of (Thm.sign_of_cterm cprop);
wenzelm@11918
   997
wenzelm@11918
   998
fun export_def _ cprops thm =
wenzelm@11918
   999
  thm
wenzelm@11918
  1000
  |> Drule.implies_intr_list cprops
wenzelm@12057
  1001
  |> Drule.forall_intr_list (map head_of_def cprops)
wenzelm@11918
  1002
  |> Drule.forall_elim_vars 0
wenzelm@11918
  1003
  |> RANGE (replicate (length cprops) (Tactic.rtac Drule.reflexive_thm)) 1;
wenzelm@11918
  1004
wenzelm@11918
  1005
wenzelm@5819
  1006
(* assume *)
wenzelm@5819
  1007
wenzelm@7270
  1008
local
wenzelm@6797
  1009
wenzelm@10465
  1010
fun add_assm (ctxt, ((name, attrs), props)) =
wenzelm@5819
  1011
  let
wenzelm@10465
  1012
    val cprops = map (Thm.cterm_of (sign_of ctxt)) props;
wenzelm@11816
  1013
    val asms = map (Tactic.norm_hhf o Thm.assume) cprops;
wenzelm@5919
  1014
wenzelm@5919
  1015
    val ths = map (fn th => ([th], [])) asms;
wenzelm@10465
  1016
    val (ctxt', [(_, thms)]) =
wenzelm@10465
  1017
      ctxt
wenzelm@12147
  1018
      |> auto_bind_facts props
berghofe@11526
  1019
      |> have_thmss [((name, attrs), ths)];
wenzelm@10465
  1020
  in (ctxt', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
  1021
wenzelm@9470
  1022
fun gen_assms prepp exp args ctxt =
wenzelm@9470
  1023
  let
wenzelm@10465
  1024
    val (ctxt1, propss) = prepp (ctxt, map snd args);
wenzelm@10465
  1025
    val (ctxt2, results) = foldl_map add_assm (ctxt1, map fst args ~~ propss);
wenzelm@10465
  1026
wenzelm@9470
  1027
    val cprops = flat (map #1 results);
wenzelm@9470
  1028
    val asmss = map #2 results;
wenzelm@9470
  1029
    val thmss = map #3 results;
wenzelm@12072
  1030
    val ctxt3 = ctxt2 |> map_context
wenzelm@12072
  1031
      (fn (thy, syntax, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@12072
  1032
        (thy, syntax, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@9470
  1033
          cases, defs));
wenzelm@11925
  1034
    val ctxt4 = ctxt3 |> put_thms ("prems", prems_of ctxt3);
wenzelm@11925
  1035
  in (warn_extra_tfrees ctxt ctxt4, thmss) end;
wenzelm@5819
  1036
wenzelm@7270
  1037
in
wenzelm@7270
  1038
wenzelm@8616
  1039
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
  1040
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
  1041
wenzelm@7270
  1042
end;
wenzelm@5819
  1043
wenzelm@5819
  1044
wenzelm@8096
  1045
(* variables *)
wenzelm@8096
  1046
wenzelm@10381
  1047
local
wenzelm@10381
  1048
wenzelm@11925
  1049
fun prep_vars prep_typ no_internal (ctxt, (xs, raw_T)) =
wenzelm@8096
  1050
  let
wenzelm@11925
  1051
    val _ = (case filter (not o Syntax.is_identifier) (map (no_skolem no_internal ctxt) xs) of
wenzelm@8096
  1052
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
  1053
wenzelm@8096
  1054
    val opt_T = apsome (prep_typ ctxt) raw_T;
wenzelm@8096
  1055
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@12130
  1056
    val ctxt' = ctxt |> declare_terms_syntax (map (fn x => Free (x, T)) xs);
wenzelm@8096
  1057
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
  1058
wenzelm@10381
  1059
in
wenzelm@10381
  1060
wenzelm@11925
  1061
val read_vars = prep_vars read_typ true;
wenzelm@11925
  1062
val cert_vars = prep_vars cert_typ false;
wenzelm@8096
  1063
wenzelm@10381
  1064
end;
wenzelm@10381
  1065
wenzelm@8096
  1066
wenzelm@5819
  1067
(* fix *)
wenzelm@5819
  1068
wenzelm@8096
  1069
local
wenzelm@8096
  1070
wenzelm@12072
  1071
fun map_vars f = map_context (fn (thy, syntax, data, (assumes, vars), binds, thms, cases, defs) =>
wenzelm@12072
  1072
  (thy, syntax, data, (assumes, f vars), binds, thms, cases, defs));
wenzelm@5819
  1073
wenzelm@11925
  1074
fun err_dups ctxt xs = raise CONTEXT ("Duplicate variable(s): " ^ commas_quote xs, ctxt);
wenzelm@11925
  1075
wenzelm@12130
  1076
val declare =
wenzelm@12130
  1077
  declare_terms_syntax o mapfilter (fn (_, None) => None | (x, Some T) => Some (Free (x, T)));
wenzelm@12130
  1078
wenzelm@12130
  1079
fun add_vars xs Ts ctxt =
wenzelm@11925
  1080
  let
wenzelm@12130
  1081
    val xs' = variantlist (xs, #2 (vars_of ctxt));
wenzelm@12130
  1082
    val xs'' = map Syntax.skolem xs';
wenzelm@12130
  1083
  in
wenzelm@12130
  1084
    ctxt |> declare (xs'' ~~ Ts)
wenzelm@12130
  1085
    |> map_vars (fn (fixes, used) => ((xs ~~ xs'') @ fixes, xs' @ used))
wenzelm@12130
  1086
  end;
wenzelm@11925
  1087
wenzelm@12130
  1088
fun add_vars_direct xs Ts ctxt =
wenzelm@12130
  1089
  ctxt |> declare (xs ~~ Ts)
wenzelm@12130
  1090
  |> map_vars (fn (fixes, used) =>
wenzelm@12130
  1091
    (case xs inter_string map #1 fixes of
wenzelm@12130
  1092
      [] => ((xs ~~ xs) @ fixes, xs @ used)
wenzelm@12130
  1093
    | dups => err_dups ctxt dups));
wenzelm@12130
  1094
wenzelm@11925
  1095
wenzelm@11925
  1096
fun gen_fix prep add raw_vars ctxt =
wenzelm@8096
  1097
  let
wenzelm@8096
  1098
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
wenzelm@12130
  1099
    val vars = rev (flat (map (fn (xs, T) => map (rpair T) xs) varss));
wenzelm@12130
  1100
    val xs = map #1 vars;
wenzelm@12130
  1101
    val Ts = map #2 vars;
wenzelm@8096
  1102
  in
wenzelm@11925
  1103
    (case Library.duplicates xs of [] => () | dups => err_dups ctxt dups);
wenzelm@12130
  1104
    ctxt' |> add xs Ts
wenzelm@8096
  1105
  end;
wenzelm@5819
  1106
wenzelm@8096
  1107
in
wenzelm@7679
  1108
wenzelm@11925
  1109
val fix = gen_fix read_vars add_vars;
wenzelm@11925
  1110
val fix_i = gen_fix cert_vars add_vars;
wenzelm@11925
  1111
val fix_direct = gen_fix cert_vars add_vars_direct;
wenzelm@8096
  1112
wenzelm@8096
  1113
end;
wenzelm@5819
  1114
wenzelm@12048
  1115
fun fix_frees ts ctxt =
wenzelm@12048
  1116
  let
wenzelm@12057
  1117
    val frees = foldl Drule.add_frees ([], ts);
wenzelm@12057
  1118
    fun new (x, T) = if is_fixed ctxt x then None else Some ([x], Some T);
wenzelm@12213
  1119
  in fix_direct (rev (mapfilter new frees)) ctxt end;
wenzelm@12016
  1120
wenzelm@6895
  1121
wenzelm@9291
  1122
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
  1123
fun bind_skolem ctxt xs =
wenzelm@9291
  1124
  let
wenzelm@9291
  1125
    val ctxt' = ctxt |> fix_i [(xs, None)];
wenzelm@9291
  1126
    fun bind (t as Free (x, T)) =
wenzelm@9291
  1127
          if x mem_string xs then
wenzelm@10583
  1128
            (case lookup_skolem ctxt' x of Some x' => Free (x', T) | None => t)
wenzelm@9291
  1129
          else t
wenzelm@9291
  1130
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
  1131
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
  1132
      | bind a = a;
wenzelm@9291
  1133
  in bind end;
wenzelm@9291
  1134
wenzelm@9291
  1135
wenzelm@5819
  1136
wenzelm@8373
  1137
(** cases **)
wenzelm@8373
  1138
wenzelm@11793
  1139
fun prep_case ctxt name xs {fixes, assumes, binds} =
wenzelm@11793
  1140
  let
wenzelm@11793
  1141
    fun replace (opt_x :: xs) ((y, T) :: ys) = (if_none opt_x y, T) :: replace xs ys
wenzelm@11793
  1142
      | replace [] ys = ys
wenzelm@11793
  1143
      | replace (_ :: _) [] = raise CONTEXT ("Too many parameters for case " ^ quote name, ctxt);
wenzelm@11793
  1144
  in
wenzelm@11793
  1145
    if null (foldr Term.add_typ_tvars (map snd fixes, [])) andalso
wenzelm@11793
  1146
      null (foldr Term.add_term_vars (assumes, [])) then
wenzelm@11793
  1147
        {fixes = replace xs fixes, assumes = assumes, binds = map drop_schematic binds}
wenzelm@11793
  1148
    else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt)
wenzelm@11793
  1149
  end;
wenzelm@8403
  1150
wenzelm@11793
  1151
fun get_case (ctxt as Context {cases, ...}) name xs =
wenzelm@8426
  1152
  (case assoc (cases, name) of
wenzelm@8373
  1153
    None => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
wenzelm@11793
  1154
  | Some c => prep_case ctxt name xs c);
wenzelm@8373
  1155
wenzelm@8384
  1156
wenzelm@12072
  1157
fun add_cases xs = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@12072
  1158
  (thy, syntax, data, asms, binds, thms, rev (filter_out (equal "" o #1) xs) @ cases, defs));
wenzelm@8373
  1159
wenzelm@8373
  1160
wenzelm@8373
  1161
wenzelm@10810
  1162
(** print context information **)
wenzelm@10810
  1163
wenzelm@10810
  1164
val verbose = ref false;
wenzelm@10810
  1165
fun verb f x = if ! verbose then f (x ()) else [];
wenzelm@10810
  1166
fun verb_single x = verb Library.single x;
wenzelm@10810
  1167
wenzelm@10810
  1168
fun setmp_verbose f x = Library.setmp verbose true f x;
wenzelm@10810
  1169
wenzelm@10810
  1170
fun pretty_items prt name items =
wenzelm@10810
  1171
  let
wenzelm@10810
  1172
    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
wenzelm@10810
  1173
      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
wenzelm@10810
  1174
  in
wenzelm@10810
  1175
    if null items andalso not (! verbose) then []
wenzelm@10810
  1176
    else [Pretty.big_list name (map prt_itms items)]
wenzelm@10810
  1177
  end;
wenzelm@10810
  1178
wenzelm@10810
  1179
wenzelm@12072
  1180
(* local syntax *)
wenzelm@12072
  1181
wenzelm@12093
  1182
val print_syntax = Syntax.print_syntax o syn_of;
wenzelm@12072
  1183
wenzelm@12072
  1184
wenzelm@10810
  1185
(* term bindings *)
wenzelm@10810
  1186
wenzelm@10810
  1187
val smash_option = fn (_, None) => None | (xi, Some b) => Some (xi, b);
wenzelm@10810
  1188
wenzelm@10810
  1189
fun pretty_binds (ctxt as Context {binds, ...}) =
wenzelm@10810
  1190
  let
wenzelm@12057
  1191
    fun prt_bind (xi, (t, T)) = pretty_term ctxt (Logic.mk_equals (Var (xi, T), t));
wenzelm@10810
  1192
    val bs = mapfilter smash_option (Vartab.dest binds);
wenzelm@10810
  1193
  in
wenzelm@10810
  1194
    if null bs andalso not (! verbose) then []
wenzelm@10810
  1195
    else [Pretty.big_list "term bindings:" (map prt_bind bs)]
wenzelm@10810
  1196
  end;
wenzelm@10810
  1197
wenzelm@10810
  1198
val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
wenzelm@10810
  1199
wenzelm@10810
  1200
wenzelm@10810
  1201
(* local theorems *)
wenzelm@10810
  1202
wenzelm@12057
  1203
fun pretty_lthms (ctxt as Context {thms, ...}) =
wenzelm@12057
  1204
  pretty_items (pretty_thm ctxt) "facts:" (mapfilter smash_option (Symtab.dest thms));
wenzelm@10810
  1205
wenzelm@12057
  1206
val print_lthms = Pretty.writeln o Pretty.chunks o pretty_lthms;
wenzelm@10810
  1207
wenzelm@10810
  1208
wenzelm@10810
  1209
(* local contexts *)
wenzelm@10810
  1210
wenzelm@10830
  1211
fun apply_case ({fixes, assumes, binds}: RuleCases.T) ctxt =
wenzelm@10810
  1212
  let
wenzelm@10830
  1213
    fun bind (c, (x, T)) = (c |> fix_i [([x], Some T)], bind_skolem c [x] (Free (x, T)));
wenzelm@10830
  1214
    val (ctxt', xs) = foldl_map bind (ctxt, fixes);
wenzelm@10810
  1215
    fun app t = foldl Term.betapply (t, xs);
wenzelm@10830
  1216
  in (ctxt', (map (apsnd (apsome app)) binds, map app assumes)) end;
wenzelm@10810
  1217
wenzelm@10810
  1218
fun pretty_cases (ctxt as Context {cases, ...}) =
wenzelm@10810
  1219
  let
wenzelm@12057
  1220
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1221
wenzelm@10810
  1222
    fun prt_let (xi, t) = Pretty.block
wenzelm@10818
  1223
      [Pretty.quote (prt_term (Var (xi, Term.fastype_of t))), Pretty.str " =", Pretty.brk 1,
wenzelm@10810
  1224
        Pretty.quote (prt_term t)];
wenzelm@10810
  1225
wenzelm@10810
  1226
    fun prt_sect _ _ _ [] = []
wenzelm@10810
  1227
      | prt_sect s sep prt xs = [Pretty.block (Pretty.breaks (Pretty.str s ::
wenzelm@10810
  1228
            flat (Library.separate sep (map (Library.single o prt) xs))))];
wenzelm@10810
  1229
wenzelm@10830
  1230
    fun prt_case (name, (fixes, (lets, asms))) = Pretty.block (Pretty.fbreaks
wenzelm@10810
  1231
      (Pretty.str (name ^ ":") ::
wenzelm@11915
  1232
        prt_sect "fix" [] (Pretty.str o fst) fixes @
wenzelm@10810
  1233
        prt_sect "let" [Pretty.str "and"] prt_let
wenzelm@10810
  1234
          (mapfilter (fn (xi, Some t) => Some (xi, t) | _ => None) lets) @
wenzelm@10810
  1235
        prt_sect "assume" [] (Pretty.quote o prt_term) asms));
wenzelm@10810
  1236
wenzelm@10810
  1237
    val cases' = rev (Library.gen_distinct Library.eq_fst cases);
wenzelm@10810
  1238
  in
wenzelm@10810
  1239
    if null cases andalso not (! verbose) then []
wenzelm@10830
  1240
    else [Pretty.big_list "cases:"
wenzelm@10830
  1241
      (map (prt_case o apsnd (fn c => (#fixes c, #2 (apply_case c ctxt)))) cases')]
wenzelm@10810
  1242
  end;
wenzelm@10810
  1243
wenzelm@10810
  1244
val print_cases = Pretty.writeln o Pretty.chunks o pretty_cases;
wenzelm@10810
  1245
wenzelm@10810
  1246
wenzelm@12057
  1247
(* core context *)
wenzelm@10810
  1248
wenzelm@10810
  1249
val prems_limit = ref 10;
wenzelm@10810
  1250
wenzelm@12057
  1251
fun pretty_asms ctxt =
wenzelm@10810
  1252
  let
wenzelm@12057
  1253
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1254
wenzelm@12093
  1255
    (*structures*)
wenzelm@12093
  1256
    val (_, structs, _) = syntax_of ctxt;
wenzelm@12093
  1257
    val prt_structs = if null structs then []
wenzelm@12093
  1258
      else [Pretty.block (Pretty.str "structures:" :: Pretty.brk 1 ::
wenzelm@12093
  1259
        Pretty.commas (map Pretty.str structs))];
wenzelm@12093
  1260
wenzelm@12057
  1261
    (*fixes*)
wenzelm@12057
  1262
    fun prt_fix (x, x') =
wenzelm@12057
  1263
      if x = x' then Pretty.str x
wenzelm@12057
  1264
      else Pretty.block [Pretty.str x, Pretty.str " =", Pretty.brk 1, prt_term (Syntax.free x')];
wenzelm@12093
  1265
    val fixes = rev (filter_out
wenzelm@12093
  1266
      ((can Syntax.dest_internal o #1) orf (fn (_, x') => x' mem_string structs)) (fixes_of ctxt));
wenzelm@12093
  1267
    val prt_fixes = if null fixes then []
wenzelm@12093
  1268
      else [Pretty.block (Pretty.str "fixed variables:" :: Pretty.brk 1 ::
wenzelm@12093
  1269
        Pretty.commas (map prt_fix fixes))];
wenzelm@12057
  1270
wenzelm@12057
  1271
    (*prems*)
wenzelm@10810
  1272
    val limit = ! prems_limit;
wenzelm@10810
  1273
    val prems = prems_of ctxt;
wenzelm@10810
  1274
    val len = length prems;
wenzelm@12093
  1275
    val prt_prems = if null prems then []
wenzelm@12093
  1276
      else [Pretty.big_list "prems:" ((if len <= limit then [] else [Pretty.str "..."]) @
wenzelm@12093
  1277
        map (pretty_thm ctxt) (Library.drop (len - limit, prems)))];
wenzelm@12093
  1278
wenzelm@12093
  1279
  in prt_structs @ prt_fixes @ prt_prems end;
wenzelm@10810
  1280
wenzelm@10810
  1281
wenzelm@10810
  1282
(* main context *)
wenzelm@10810
  1283
wenzelm@12291
  1284
fun pretty_context (ctxt as Context {cases, defs = (types, sorts, used, _), ...}) =
wenzelm@10810
  1285
  let
wenzelm@12057
  1286
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1287
    val prt_typ = pretty_typ ctxt;
wenzelm@12057
  1288
    val prt_sort = pretty_sort ctxt;
wenzelm@10810
  1289
wenzelm@10810
  1290
    (*theory*)
wenzelm@12057
  1291
    val pretty_thy = Pretty.block
wenzelm@12057
  1292
      [Pretty.str "Theory:", Pretty.brk 1, Sign.pretty_sg (sign_of ctxt)];
wenzelm@10810
  1293
wenzelm@10810
  1294
    (*defaults*)
wenzelm@10810
  1295
    fun prt_atom prt prtT (x, X) = Pretty.block
wenzelm@10810
  1296
      [prt x, Pretty.str " ::", Pretty.brk 1, prtT X];
wenzelm@10810
  1297
wenzelm@10810
  1298
    fun prt_var (x, ~1) = prt_term (Syntax.free x)
wenzelm@10810
  1299
      | prt_var xi = prt_term (Syntax.var xi);
wenzelm@10810
  1300
wenzelm@10810
  1301
    fun prt_varT (x, ~1) = prt_typ (TFree (x, []))
wenzelm@10810
  1302
      | prt_varT xi = prt_typ (TVar (xi, []));
wenzelm@10810
  1303
wenzelm@10810
  1304
    val prt_defT = prt_atom prt_var prt_typ;
wenzelm@10810
  1305
    val prt_defS = prt_atom prt_varT prt_sort;
wenzelm@10810
  1306
  in
wenzelm@10810
  1307
    verb_single (K pretty_thy) @
wenzelm@12057
  1308
    pretty_asms ctxt @
wenzelm@10810
  1309
    verb pretty_binds (K ctxt) @
wenzelm@12057
  1310
    verb pretty_lthms (K ctxt) @
wenzelm@10810
  1311
    verb pretty_cases (K ctxt) @
wenzelm@10810
  1312
    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
wenzelm@10810
  1313
    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
wenzelm@10810
  1314
    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
wenzelm@10810
  1315
  end;
wenzelm@10810
  1316
wenzelm@10810
  1317
wenzelm@10810
  1318
wenzelm@5819
  1319
(** theory setup **)
wenzelm@5819
  1320
wenzelm@5819
  1321
val setup = [ProofDataData.init];
wenzelm@5819
  1322
wenzelm@5819
  1323
end;