src/Pure/sign.ML
author wenzelm
Thu Mar 30 14:19:13 2000 +0200 (2000-03-30)
changeset 8607 bf129c6505de
parent 8290 7015d6b11b56
child 8715 2cdabe1bb350
permissions -rw-r--r--
read_def_terms (no certify yet);
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(*  Title:      Pure/sign.ML
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    ID:         $Id$
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    Author:     Lawrence C Paulson and Markus Wenzel
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The abstract type "sg" of signatures.
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*)
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(*base names*)
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type bstring = string;
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type bclass = class;
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(*external forms -- partially qualified names*)
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type xstring = string;
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type xclass = class;
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type xsort = sort;
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type xtyp = typ;
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type xterm = term;
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signature SIGN =
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sig
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  type sg
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  type sg_ref
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  type data
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  val rep_sg: sg ->
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   {self: sg_ref,
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    tsig: Type.type_sig,
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    const_tab: typ Symtab.table,
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    syn: Syntax.syntax,
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    path: string list,
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    spaces: (string * NameSpace.T) list,
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    data: data}
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  val name_of: sg -> string
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  val stamp_names_of: sg -> string list
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  val tsig_of: sg -> Type.type_sig
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  val deref: sg_ref -> sg
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  val self_ref: sg -> sg_ref
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  val subsig: sg * sg -> bool
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  val eq_sg: sg * sg -> bool
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  val same_sg: sg * sg -> bool
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  val is_draft: sg -> bool
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  val is_stale: sg -> bool
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  val const_type: sg -> string -> typ option
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  val classes: sg -> class list
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  val defaultS: sg -> sort
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  val subsort: sg -> sort * sort -> bool
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  val nodup_vars: term -> term
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  val norm_sort: sg -> sort -> sort
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  val of_sort: sg -> typ * sort -> bool
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  val witness_sorts: sg -> sort list -> sort list -> (typ * sort) list
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  val univ_witness: sg -> (typ * sort) option
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  val classK: string
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  val typeK: string
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  val constK: string
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  val full_name: sg -> bstring -> string
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  val full_name_path: sg -> string -> bstring -> string
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  val base_name: string -> bstring
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  val intern: sg -> string -> xstring -> string
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  val extern: sg -> string -> string -> xstring
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  val cond_extern: sg -> string -> string -> xstring
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  val cond_extern_table: sg -> string -> 'a Symtab.table -> (xstring * 'a) list
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  val intern_class: sg -> xclass -> class
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  val intern_tycon: sg -> xstring -> string
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  val intern_const: sg -> xstring -> string
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  val intern_sort: sg -> xsort -> sort
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  val intern_typ: sg -> xtyp -> typ
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  val intern_term: sg -> xterm -> term
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  val intern_tycons: sg -> xtyp -> typ
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  val pretty_sg: sg -> Pretty.T
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  val str_of_sg: sg -> string
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  val pprint_sg: sg -> pprint_args -> unit
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  val pretty_term: sg -> term -> Pretty.T
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  val pretty_typ: sg -> typ -> Pretty.T
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  val pretty_sort: sg -> sort -> Pretty.T
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  val pretty_classrel: sg -> class * class -> Pretty.T
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  val pretty_arity: sg -> string * sort list * sort -> Pretty.T
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  val string_of_term: sg -> term -> string
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  val string_of_typ: sg -> typ -> string
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  val string_of_sort: sg -> sort -> string
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  val str_of_sort: sg -> sort -> string
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  val str_of_classrel: sg -> class * class -> string
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  val str_of_arity: sg -> string * sort list * sort -> string
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  val pprint_term: sg -> term -> pprint_args -> unit
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  val pprint_typ: sg -> typ -> pprint_args -> unit
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  val certify_typ: sg -> typ -> typ
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  val certify_term: sg -> term -> term * typ * int
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  val read_raw_typ: sg * (indexname -> sort option) -> string -> typ
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  val read_typ: sg * (indexname -> sort option) -> string -> typ
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  val infer_types: sg -> (indexname -> typ option) ->
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    (indexname -> sort option) -> string list -> bool
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    -> xterm list * typ -> term * (indexname * typ) list
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  val infer_types_simult: sg -> (indexname -> typ option) ->
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    (indexname -> sort option) -> string list -> bool
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    -> (xterm list * typ) list -> term list * (indexname * typ) list
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  val read_def_terms:
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    sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> bool -> (string * typ) list -> term list * (indexname * typ) list
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  val add_classes: (bclass * xclass list) list -> sg -> sg
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  val add_classes_i: (bclass * class list) list -> sg -> sg
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  val add_classrel: (xclass * xclass) list -> sg -> sg
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  val add_classrel_i: (class * class) list -> sg -> sg
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  val add_defsort: xsort -> sg -> sg
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  val add_defsort_i: sort -> sg -> sg
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  val add_types: (bstring * int * mixfix) list -> sg -> sg
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  val add_nonterminals: bstring list -> sg -> sg
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  val add_tyabbrs: (bstring * string list * string * mixfix) list -> sg -> sg
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  val add_tyabbrs_i: (bstring * string list * typ * mixfix) list -> sg -> sg
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  val add_arities: (xstring * xsort list * xsort) list -> sg -> sg
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  val add_arities_i: (string * sort list * sort) list -> sg -> sg
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  val add_consts: (bstring * string * mixfix) list -> sg -> sg
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  val add_consts_i: (bstring * typ * mixfix) list -> sg -> sg
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  val add_syntax: (bstring * string * mixfix) list -> sg -> sg
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  val add_syntax_i: (bstring * typ * mixfix) list -> sg -> sg
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  val add_modesyntax: (string * bool) * (bstring * string * mixfix) list -> sg -> sg
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  val add_modesyntax_i: (string * bool) * (bstring * typ * mixfix) list -> sg -> sg
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  val add_trfuns:
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    (string * (ast list -> ast)) list *
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    (string * (term list -> term)) list *
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    (string * (term list -> term)) list *
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    (string * (ast list -> ast)) list -> sg -> sg
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  val add_trfunsT:
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    (string * (bool -> typ -> term list -> term)) list -> sg -> sg
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  val add_tokentrfuns:
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    (string * string * (string -> string * real)) list -> sg -> sg
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  val add_trrules: (xstring * string) Syntax.trrule list -> sg -> sg
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  val add_trrules_i: ast Syntax.trrule list -> sg -> sg
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  val add_path: string -> sg -> sg
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  val add_space: string * string list -> sg -> sg
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  val add_name: string -> sg -> sg
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  val data_kinds: data -> string list
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  val merge_refs: sg_ref * sg_ref -> sg_ref
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  val merge: sg * sg -> sg
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  val prep_ext: sg -> sg
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  val copy: sg -> sg
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  val nontriv_merge: sg * sg -> sg
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  val pre_pure: sg
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  val const_of_class: class -> string
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  val class_of_const: string -> class
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end;
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signature PRIVATE_SIGN =
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sig
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  include SIGN
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  val init_data: Object.kind * (Object.T * (Object.T -> Object.T) * (Object.T -> Object.T) *
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    (Object.T * Object.T -> Object.T) * (sg -> Object.T -> unit)) -> sg -> sg
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  val get_data: Object.kind -> (Object.T -> 'a) -> sg -> 'a
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  val put_data: Object.kind -> ('a -> Object.T) -> 'a -> sg -> sg
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  val print_data: Object.kind -> sg -> unit
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end;
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structure Sign: PRIVATE_SIGN =
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struct
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(** datatype sg **)
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(* types sg, data, sg_ref *)
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datatype sg =
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  Sg of
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   {id: string ref,                             (*id*)
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    stamps: string ref list} *                  (*unique theory indentifier*)
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   {self: sg_ref,                               (*mutable self reference*)
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    tsig: Type.type_sig,                        (*order-sorted signature of types*)
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    const_tab: typ Symtab.table,                (*type schemes of constants*)
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    syn: Syntax.syntax,                         (*syntax for parsing and printing*)
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    path: string list,                          (*current name space entry prefix*)
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    spaces: (string * NameSpace.T) list,        (*name spaces for consts, types etc.*)
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    data: data}                                 (*anytype data*)
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and data =
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  Data of
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    (Object.kind *				(*kind (for authorization)*)
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      (Object.T *				(*value*)
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        ((Object.T -> Object.T) *               (*prepare extend method*)
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          (Object.T -> Object.T) *              (*copy method*)
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          (Object.T * Object.T -> Object.T) *   (*merge and prepare extend method*)
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          (sg -> Object.T -> unit))))           (*print method*)
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    Symtab.table
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and sg_ref =
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  SgRef of sg ref option;
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(*make signature*)
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fun make_sign (id, self, tsig, const_tab, syn, path, spaces, data, stamps) =
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  Sg ({id = id, stamps = stamps}, {self = self, tsig = tsig, const_tab = const_tab,
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    syn = syn, path = path, spaces = spaces, data = data});
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(* basic operations *)
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fun rep_sg (Sg (_, args)) = args;
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(*show stamps*)
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fun stamp_names_of (Sg ({stamps, ...}, _)) = rev (map ! stamps);
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fun pretty_sg sg = Pretty.str_list "{" "}" (stamp_names_of sg);
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val str_of_sg = Pretty.str_of o pretty_sg;
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val pprint_sg = Pretty.pprint o pretty_sg;
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val tsig_of = #tsig o rep_sg;
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fun const_type (Sg (_, {const_tab, ...})) c = Symtab.lookup (const_tab, c);
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(* id and self *)
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fun check_stale (sg as Sg ({id, ...},
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        {self = SgRef (Some (ref (Sg ({id = id', ...}, _)))), ...})) =
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      if id = id' then sg
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      else raise TERM ("Stale signature: " ^ str_of_sg sg, [])
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  | check_stale _ = sys_error "Sign.check_stale";
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fun is_stale sg = (check_stale sg; false) handle TERM _ => true;
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fun self_ref (sg as Sg (_, {self, ...})) = (check_stale sg; self);
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fun deref (SgRef (Some (ref sg))) = sg
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  | deref (SgRef None) = sys_error "Sign.deref";
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fun name_of (sg as Sg ({id = ref name, ...}, _)) =
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  if name = "" orelse ord name = ord "#" then
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    raise TERM ("Nameless signature " ^ str_of_sg sg, [])
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  else name;
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(* inclusion and equality *)
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local
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  (*avoiding polymorphic equality: factor 10 speedup*)
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  fun mem_stamp (_:string ref, []) = false
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    | mem_stamp (x, y :: ys) = x = y orelse mem_stamp (x, ys);
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  fun subset_stamp ([], ys) = true
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    | subset_stamp (x :: xs, ys) =
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        mem_stamp (x, ys) andalso subset_stamp (xs, ys);
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  (*fast partial test*)
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  fun fast_sub ([]: string ref list, _) = true
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    | fast_sub (_, []) = false
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    | fast_sub (x :: xs, y :: ys) =
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        if x = y then fast_sub (xs, ys)
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        else fast_sub (x :: xs, ys);
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in
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  fun eq_sg (sg1 as Sg ({id = id1, ...}, _), sg2 as Sg ({id = id2, ...}, _)) =
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    (check_stale sg1; check_stale sg2; id1 = id2);
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  fun subsig (sg1 as Sg ({stamps = s1, ...}, _), sg2 as Sg ({stamps = s2, ...}, _)) =
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    eq_sg (sg1, sg2) orelse subset_stamp (s1, s2);
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  fun fast_subsig (sg1 as Sg ({stamps = s1, ...}, _), sg2 as Sg ({stamps = s2, ...}, _)) =
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    eq_sg (sg1, sg2) orelse fast_sub (s1, s2);
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end;
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(*test if same theory names are contained in signatures' stamps,
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  i.e. if signatures belong to same theory but not necessarily to the
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  same version of it*)
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fun same_sg (sg1 as Sg ({stamps = s1, ...}, _), sg2 as Sg ({stamps = s2, ...}, _)) =
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  eq_sg (sg1, sg2) orelse eq_set_string (pairself (map (op !)) (s1, s2));
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(*test for drafts*)
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fun is_draft (Sg ({stamps = ref name :: _, ...}, _)) = name = "" orelse ord name = ord "#";
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(* classes and sorts *)
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val classes = Type.classes o tsig_of;
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val defaultS = Type.defaultS o tsig_of;
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val subsort = Type.subsort o tsig_of;
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val norm_sort = Type.norm_sort o tsig_of;
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val of_sort = Type.of_sort o tsig_of;
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val witness_sorts = Type.witness_sorts o tsig_of;
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val univ_witness = Type.univ_witness o tsig_of;
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(** signature data **)
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(* errors *)
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fun of_theory sg = "\nof theory " ^ str_of_sg sg;
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fun err_inconsistent kinds =
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  error ("Attempt to merge different versions of " ^ commas_quote kinds ^ " data");
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fun err_method name kind e =
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  (writeln ("Error while invoking " ^ quote kind ^ " " ^ name ^ " method"); raise e);
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fun err_dup_init sg kind =
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  error ("Duplicate initialization of " ^ quote kind ^ " data" ^ of_theory sg);
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fun err_uninit sg kind =
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  error ("Tried to access uninitialized " ^ quote kind ^ " data" ^ 
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	 of_theory sg);
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(*Trying to access theory data using get / put operations from a different
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  instance of the TheoryDataFun result.  Typical cure: re-load all files*)
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fun err_access sg kind =
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  error ("Unauthorized access to " ^ quote kind ^ " data" ^ of_theory sg);
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(* prepare data *)
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val empty_data = Data Symtab.empty;
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fun merge_data (Data tab1, Data tab2) =
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  let
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    val data1 = map snd (Symtab.dest tab1);
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    val data2 = map snd (Symtab.dest tab2);
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    val all_data = data1 @ data2;
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    val kinds = gen_distinct Object.eq_kind (map fst all_data);
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   fun entry data kind =
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     (case gen_assoc Object.eq_kind (data, kind) of
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       None => []
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     | Some x => [(kind, x)]);
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    fun merge_entries [(kind, (e, mths as (_, ext, _, _)))] =
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          (kind, (ext e handle exn => err_method "prep_ext" (Object.name_of_kind kind) exn, mths))
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      | merge_entries [(kind, (e1, mths as (_, _, mrg, _))), (_, (e2, _))] =
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          (kind, (mrg (e1, e2)
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            handle exn => err_method "merge" (Object.name_of_kind kind) exn, mths))
wenzelm@4256
   319
      | merge_entries _ = sys_error "merge_entries";
wenzelm@4256
   320
wenzelm@4256
   321
    val data = map (fn k => merge_entries (entry data1 k @ entry data2 k)) kinds;
wenzelm@4998
   322
    val data_idx = map (fn (k, x) => (Object.name_of_kind k, (k, x))) data;
wenzelm@4998
   323
  in
wenzelm@4998
   324
    Data (Symtab.make data_idx)
wenzelm@4998
   325
      handle Symtab.DUPS dups => err_inconsistent dups
wenzelm@4998
   326
  end;
wenzelm@4256
   327
wenzelm@4256
   328
fun prep_ext_data data = merge_data (data, empty_data);
wenzelm@4256
   329
wenzelm@6546
   330
fun init_data_sg sg (Data tab) kind e cp ext mrg prt =
wenzelm@4998
   331
  let val name = Object.name_of_kind kind in
wenzelm@6546
   332
    Data (Symtab.update_new ((name, (kind, (e, (cp, ext, mrg, prt)))), tab))
wenzelm@4998
   333
      handle Symtab.DUP _ => err_dup_init sg name
wenzelm@4998
   334
  end;
wenzelm@4256
   335
wenzelm@4256
   336
wenzelm@4256
   337
(* access data *)
wenzelm@4256
   338
wenzelm@4256
   339
fun data_kinds (Data tab) = map fst (Symtab.dest tab);
wenzelm@4256
   340
wenzelm@4256
   341
fun lookup_data sg tab kind =
wenzelm@4998
   342
  let val name = Object.name_of_kind kind in
wenzelm@4998
   343
    (case Symtab.lookup (tab, name) of
wenzelm@4998
   344
      Some (k, x) =>
wenzelm@4998
   345
        if Object.eq_kind (kind, k) then x
wenzelm@4998
   346
        else err_access sg name
wenzelm@4998
   347
    | None => err_uninit sg name)
wenzelm@4998
   348
  end;
wenzelm@4256
   349
wenzelm@4998
   350
fun get_data kind f (sg as Sg (_, {data = Data tab, ...})) =
wenzelm@4998
   351
  let val x = fst (lookup_data sg tab kind)
wenzelm@4998
   352
  in f x handle Match => Object.kind_error kind end;
wenzelm@4998
   353
wenzelm@4998
   354
fun print_data kind (sg as Sg (_, {data = Data tab, ...})) =
wenzelm@6546
   355
  let val (e, (_, _, _, prt)) = lookup_data sg tab kind
wenzelm@6961
   356
  in prt sg e handle exn => err_method ("print" ^ of_theory sg) (Object.name_of_kind kind) exn end;
wenzelm@4256
   357
wenzelm@4998
   358
fun put_data_sg sg (Data tab) kind f x =
wenzelm@4998
   359
  Data (Symtab.update ((Object.name_of_kind kind,
wenzelm@4998
   360
    (kind, (f x, snd (lookup_data sg tab kind)))), tab));
wenzelm@4256
   361
wenzelm@4256
   362
wenzelm@4256
   363
wenzelm@4256
   364
(** build signatures **)
wenzelm@3967
   365
wenzelm@3967
   366
fun ext_stamps stamps (id as ref name) =
wenzelm@3967
   367
  let val stmps = (case stamps of ref "#" :: ss => ss | ss => ss) in
wenzelm@3967
   368
    if exists (equal name o !) stmps then
wenzelm@3967
   369
      error ("Theory already contains a " ^ quote name ^ " component")
wenzelm@3967
   370
    else id :: stmps
wenzelm@3967
   371
  end;
wenzelm@3967
   372
wenzelm@3967
   373
fun create_sign self stamps name (syn, tsig, ctab, (path, spaces), data) =
wenzelm@3967
   374
  let
wenzelm@3967
   375
    val id = ref name;
wenzelm@3967
   376
    val sign =
wenzelm@3967
   377
      make_sign (id, self, tsig, ctab, syn, path, spaces, data, ext_stamps stamps id);
wenzelm@3967
   378
  in
wenzelm@3967
   379
    (case self of
wenzelm@3967
   380
      SgRef (Some r) => r := sign
wenzelm@3967
   381
    | _ => sys_error "Sign.create_sign");
wenzelm@3967
   382
    sign
wenzelm@3967
   383
  end;
wenzelm@3967
   384
wenzelm@3975
   385
fun extend_sign keep extfun name decls
wenzelm@3975
   386
    (sg as Sg ({id = _, stamps}, {self, tsig, const_tab, syn, path, spaces, data})) =
wenzelm@3967
   387
  let
wenzelm@3967
   388
    val _ = check_stale sg;
wenzelm@3967
   389
    val (self', data') =
wenzelm@3975
   390
      if is_draft sg andalso keep then (self, data)
wenzelm@4256
   391
      else (SgRef (Some (ref sg)), prep_ext_data data);
wenzelm@3967
   392
  in
wenzelm@3967
   393
    create_sign self' stamps name
wenzelm@3967
   394
      (extfun (syn, tsig, const_tab, (path, spaces), data') decls)
wenzelm@3967
   395
  end;
wenzelm@3967
   396
wenzelm@3967
   397
wenzelm@3791
   398
wenzelm@3791
   399
(** name spaces **)
wenzelm@3791
   400
wenzelm@3791
   401
(* kinds *)
wenzelm@3791
   402
wenzelm@3791
   403
val classK = "class";
wenzelm@3791
   404
val typeK = "type";
wenzelm@3791
   405
val constK = "const";
wenzelm@3791
   406
wenzelm@3791
   407
wenzelm@3791
   408
(* add and retrieve names *)
wenzelm@3791
   409
wenzelm@3791
   410
fun space_of spaces kind =
wenzelm@3791
   411
  if_none (assoc (spaces, kind)) NameSpace.empty;
wenzelm@3791
   412
wenzelm@3791
   413
(*input and output of qualified names*)
wenzelm@3995
   414
fun intrn spaces kind = NameSpace.intern (space_of spaces kind);
wenzelm@3995
   415
fun extrn spaces kind = NameSpace.extern (space_of spaces kind);
wenzelm@5175
   416
fun cond_extrn spaces kind = NameSpace.cond_extern (space_of spaces kind);
wenzelm@6845
   417
fun cond_extrn_table spaces kind tab = NameSpace.cond_extern_table (space_of spaces kind) tab;
wenzelm@3791
   418
wenzelm@3791
   419
(*add names*)
wenzelm@3791
   420
fun add_names spaces kind names =
wenzelm@4489
   421
  let val space' = NameSpace.extend (space_of spaces kind, names) in
wenzelm@3791
   422
    overwrite (spaces, (kind, space'))
wenzelm@3791
   423
  end;
wenzelm@3791
   424
wenzelm@3810
   425
(*make full names*)
wenzelm@3937
   426
fun full path name =
wenzelm@4489
   427
  if name = "" then error "Attempt to declare empty name \"\""
wenzelm@4489
   428
  else if NameSpace.qualified name then
wenzelm@3937
   429
    error ("Attempt to declare qualified name " ^ quote name)
wenzelm@3937
   430
  else NameSpace.pack (path @ [name]);
wenzelm@3937
   431
wenzelm@3937
   432
(*base name*)
wenzelm@3937
   433
val base_name = NameSpace.base;
wenzelm@3791
   434
wenzelm@3791
   435
wenzelm@3791
   436
(* intern / extern names *)
wenzelm@3791
   437
wenzelm@3791
   438
local
wenzelm@3791
   439
  (*prepare mapping of names*)
wenzelm@3791
   440
  fun mapping f add_xs t =
wenzelm@3791
   441
    let
wenzelm@3791
   442
      fun f' x = let val y = f x in if x = y then None else Some (x, y) end;
wenzelm@3791
   443
      val table = mapfilter f' (add_xs (t, []));
wenzelm@3791
   444
      fun lookup x = if_none (assoc (table, x)) x;
wenzelm@3791
   445
    in lookup end;
wenzelm@3791
   446
wenzelm@3791
   447
  (*intern / extern typ*)
wenzelm@3791
   448
  fun trn_typ trn T =
wenzelm@3791
   449
    T |> map_typ
wenzelm@3791
   450
      (mapping (trn classK) add_typ_classes T)
wenzelm@3791
   451
      (mapping (trn typeK) add_typ_tycons T);
wenzelm@3791
   452
wenzelm@3791
   453
  (*intern / extern term*)
wenzelm@3791
   454
  fun trn_term trn t =
wenzelm@3791
   455
    t |> map_term
wenzelm@3791
   456
      (mapping (trn classK) add_term_classes t)
wenzelm@3791
   457
      (mapping (trn typeK) add_term_tycons t)
wenzelm@3791
   458
      (mapping (trn constK) add_term_consts t);
wenzelm@3791
   459
wenzelm@3975
   460
  val spaces_of = #spaces o rep_sg;
wenzelm@3791
   461
in
wenzelm@3791
   462
  fun intrn_class spaces = intrn spaces classK;
wenzelm@3791
   463
  fun extrn_class spaces = extrn spaces classK;
wenzelm@3937
   464
wenzelm@3791
   465
  val intrn_sort = map o intrn_class;
wenzelm@3791
   466
  val intrn_typ = trn_typ o intrn;
wenzelm@3937
   467
  val intrn_term = trn_term o intrn;
wenzelm@3937
   468
wenzelm@3937
   469
  val extrn_sort = map o extrn_class;
wenzelm@3791
   470
  val extrn_typ = trn_typ o extrn;
wenzelm@3791
   471
  val extrn_term = trn_term o extrn;
wenzelm@3791
   472
wenzelm@3805
   473
  fun intrn_tycons spaces T =
wenzelm@3805
   474
    map_typ I (mapping (intrn spaces typeK) add_typ_tycons T) T;
wenzelm@3805
   475
wenzelm@3810
   476
  val intern = intrn o spaces_of;
wenzelm@3855
   477
  val extern = extrn o spaces_of;
wenzelm@5175
   478
  val cond_extern = cond_extrn o spaces_of;
wenzelm@6845
   479
  fun cond_extern_table sg = cond_extrn_table (spaces_of sg);
wenzelm@3937
   480
wenzelm@3791
   481
  val intern_class = intrn_class o spaces_of;
wenzelm@3791
   482
  val intern_sort = intrn_sort o spaces_of;
wenzelm@3791
   483
  val intern_typ = intrn_typ o spaces_of;
wenzelm@3791
   484
  val intern_term = intrn_term o spaces_of;
wenzelm@3791
   485
wenzelm@3791
   486
  fun intern_tycon sg = intrn (spaces_of sg) typeK;
wenzelm@3791
   487
  fun intern_const sg = intrn (spaces_of sg) constK;
wenzelm@3937
   488
wenzelm@3791
   489
  val intern_tycons = intrn_tycons o spaces_of;
wenzelm@3791
   490
wenzelm@3975
   491
  val full_name = full o #path o rep_sg;
wenzelm@4908
   492
  fun full_name_path sg elems name =
wenzelm@4844
   493
    full (#path (rep_sg sg) @ NameSpace.unpack elems) name;
wenzelm@3791
   494
end;
wenzelm@620
   495
wenzelm@402
   496
clasohm@0
   497
wenzelm@4249
   498
(** pretty printing of terms, types etc. **)
wenzelm@3937
   499
wenzelm@4249
   500
fun pretty_term (sg as Sg ({stamps, ...}, {syn, spaces, ...})) t =
wenzelm@3937
   501
  Syntax.pretty_term syn
wenzelm@4249
   502
    (exists (equal "CPure" o !) stamps)
wenzelm@5175
   503
    (if ! NameSpace.long_names then t else extrn_term spaces t);
wenzelm@3937
   504
wenzelm@3975
   505
fun pretty_typ (Sg (_, {syn, spaces, ...})) T =
wenzelm@3937
   506
  Syntax.pretty_typ syn
wenzelm@5175
   507
    (if ! NameSpace.long_names then T else extrn_typ spaces T);
wenzelm@3937
   508
wenzelm@3975
   509
fun pretty_sort (Sg (_, {syn, spaces, ...})) S =
wenzelm@3937
   510
  Syntax.pretty_sort syn
wenzelm@5175
   511
    (if ! NameSpace.long_names then S else extrn_sort spaces S);
wenzelm@3937
   512
wenzelm@3937
   513
fun pretty_classrel sg (c1, c2) = Pretty.block
wenzelm@3937
   514
  [pretty_sort sg [c1], Pretty.str " <", Pretty.brk 1, pretty_sort sg [c2]];
wenzelm@3937
   515
wenzelm@3937
   516
fun pretty_arity sg (t, Ss, S) =
wenzelm@3937
   517
  let
wenzelm@3937
   518
    val t' = cond_extern sg typeK t;
wenzelm@3937
   519
    val dom =
wenzelm@3937
   520
      if null Ss then []
wenzelm@3937
   521
      else [Pretty.list "(" ")" (map (pretty_sort sg) Ss), Pretty.brk 1];
wenzelm@3937
   522
  in
wenzelm@3937
   523
    Pretty.block
wenzelm@3937
   524
      ([Pretty.str (t' ^ " ::"), Pretty.brk 1] @ dom @ [pretty_sort sg S])
wenzelm@3937
   525
  end;
wenzelm@3937
   526
wenzelm@3937
   527
fun string_of_term sg t = Pretty.string_of (pretty_term sg t);
wenzelm@3937
   528
fun string_of_typ sg T = Pretty.string_of (pretty_typ sg T);
wenzelm@3937
   529
fun string_of_sort sg S = Pretty.string_of (pretty_sort sg S);
wenzelm@3937
   530
wenzelm@3937
   531
fun str_of_sort sg S = Pretty.str_of (pretty_sort sg S);
wenzelm@3937
   532
fun str_of_classrel sg c1_c2 = Pretty.str_of (pretty_classrel sg c1_c2);
wenzelm@3937
   533
fun str_of_arity sg ar = Pretty.str_of (pretty_arity sg ar);
wenzelm@3937
   534
wenzelm@3937
   535
fun pprint_term sg = Pretty.pprint o Pretty.quote o (pretty_term sg);
wenzelm@3937
   536
fun pprint_typ sg = Pretty.pprint o Pretty.quote o (pretty_typ sg);
wenzelm@3937
   537
wenzelm@3937
   538
wenzelm@3937
   539
wenzelm@562
   540
(** read types **)  (*exception ERROR*)
wenzelm@562
   541
wenzelm@562
   542
fun err_in_type s =
wenzelm@562
   543
  error ("The error(s) above occurred in type " ^ quote s);
wenzelm@562
   544
wenzelm@4227
   545
fun rd_raw_typ syn tsig spaces def_sort str =
wenzelm@3791
   546
  intrn_tycons spaces
wenzelm@3791
   547
    (Syntax.read_typ syn (Type.get_sort tsig def_sort (intrn_sort spaces)) str
wenzelm@3791
   548
      handle ERROR => err_in_type str);
wenzelm@4227
   549
wenzelm@4227
   550
fun read_raw_typ (sg as Sg (_, {tsig, syn, spaces, ...}), def_sort) str =
wenzelm@4227
   551
  (check_stale sg; rd_raw_typ syn tsig spaces def_sort str);
wenzelm@4227
   552
wenzelm@562
   553
(*read and certify typ wrt a signature*)
wenzelm@4227
   554
fun read_typ (sg, def_sort) str =
wenzelm@4227
   555
  (Type.cert_typ (tsig_of sg) (read_raw_typ (sg, def_sort) str)
wenzelm@3969
   556
      handle TYPE (msg, _, _) => (error_msg msg; err_in_type str));
wenzelm@562
   557
wenzelm@562
   558
wenzelm@562
   559
wenzelm@386
   560
(** certify types and terms **)   (*exception TYPE*)
wenzelm@251
   561
wenzelm@4961
   562
(* certify_typ *)
wenzelm@4961
   563
wenzelm@3975
   564
val certify_typ = Type.cert_typ o tsig_of;
wenzelm@251
   565
wenzelm@4961
   566
wenzelm@4961
   567
(* certify_term *)
wenzelm@4961
   568
wenzelm@8290
   569
(*check for duplicate occurrences of TFree/TVar with distinct sorts*)
wenzelm@8290
   570
fun nodup_tvars (env, Type (_, Ts)) = nodup_tvars_list (env, Ts)
wenzelm@8290
   571
  | nodup_tvars (env as (tfrees, tvars), T as TFree (v as (a, S))) =
wenzelm@8290
   572
      (case assoc_string (tfrees, a) of
wenzelm@8290
   573
        Some S' =>
wenzelm@8290
   574
          if S = S' then env
wenzelm@8290
   575
          else raise TYPE ("Type variable " ^ quote a ^
wenzelm@8290
   576
            " has two distinct sorts", [TFree (a, S'), T], [])
wenzelm@8290
   577
      | None => (v :: tfrees, tvars))
wenzelm@8290
   578
  | nodup_tvars (env as (tfrees, tvars), T as TVar (v as (a, S))) =
wenzelm@2979
   579
      (case assoc_string_int (tvars, a) of
wenzelm@2979
   580
        Some S' =>
wenzelm@8290
   581
          if S = S' then env
wenzelm@8290
   582
          else raise TYPE ("Type variable " ^ quote (Syntax.string_of_vname a) ^
wenzelm@3791
   583
            " has two distinct sorts", [TVar (a, S'), T], [])
wenzelm@8290
   584
      | None => (tfrees, v :: tvars))
wenzelm@8290
   585
(*equivalent to foldl nodup_tvars_list, but 3X faster under Poly/ML*)
wenzelm@8290
   586
and nodup_tvars_list (env, []) = env
wenzelm@8290
   587
  | nodup_tvars_list (env, T :: Ts) = nodup_tvars_list (nodup_tvars (env, T), Ts);
nipkow@1494
   588
wenzelm@8290
   589
(*check for duplicate occurrences of Free/Var with distinct types*)
wenzelm@8290
   590
fun nodup_vars tm =
wenzelm@2979
   591
  let
wenzelm@8290
   592
    fun nodups (envs as (env as (frees, vars), envT)) tm =
wenzelm@2979
   593
      (case tm of
wenzelm@8290
   594
        Const (c, T) => (env, nodup_tvars (envT, T))
wenzelm@8290
   595
      | Free (v as (a, T)) =>
wenzelm@8290
   596
          (case assoc_string (frees, a) of
wenzelm@8290
   597
            Some T' =>
wenzelm@8290
   598
              if T = T' then (env, nodup_tvars (envT, T))
wenzelm@8290
   599
              else raise TYPE ("Variable " ^ quote a ^
wenzelm@8290
   600
                " has two distinct types", [T', T], [])
wenzelm@8290
   601
          | None => ((v :: frees, vars), nodup_tvars (envT, T)))
wenzelm@2979
   602
      | Var (v as (ixn, T)) =>
wenzelm@2979
   603
          (case assoc_string_int (vars, ixn) of
wenzelm@2979
   604
            Some T' =>
wenzelm@8290
   605
              if T = T' then (env, nodup_tvars (envT, T))
wenzelm@8290
   606
              else raise TYPE ("Variable " ^ quote (Syntax.string_of_vname ixn) ^
wenzelm@3791
   607
                " has two distinct types", [T', T], [])
wenzelm@8290
   608
          | None => ((frees, v :: vars), nodup_tvars (envT, T)))
wenzelm@8290
   609
      | Bound _ => envs
wenzelm@8290
   610
      | Abs (_, T, t) => nodups (env, nodup_tvars (envT, T)) t
wenzelm@8290
   611
      | s $ t => nodups (nodups envs s) t)
wenzelm@8290
   612
  in nodups (([], []), ([], [])) tm; tm end;
wenzelm@2979
   613
wenzelm@4961
   614
(*compute and check type of the term*)
wenzelm@4961
   615
fun type_check sg tm =
wenzelm@4961
   616
  let
wenzelm@4961
   617
    val prt =
wenzelm@4961
   618
      setmp Syntax.show_brackets true
wenzelm@5175
   619
        (setmp NameSpace.long_names true (pretty_term sg));
wenzelm@5175
   620
    val prT = setmp NameSpace.long_names true (pretty_typ sg);
wenzelm@251
   621
wenzelm@4961
   622
    fun err_appl why bs t T u U =
wenzelm@4961
   623
      let
wenzelm@4961
   624
        val xs = map Free bs;		(*we do not rename here*)
wenzelm@4961
   625
        val t' = subst_bounds (xs, t);
wenzelm@4961
   626
        val u' = subst_bounds (xs, u);
nipkow@5635
   627
        val text = cat_lines(TypeInfer.appl_error prt prT why t' T u' U);
wenzelm@4961
   628
      in raise TYPE (text, [T, U], [t', u']) end;
wenzelm@4961
   629
wenzelm@4961
   630
    fun typ_of (_, Const (_, T)) = T
wenzelm@4961
   631
      | typ_of (_, Free  (_, T)) = T
wenzelm@4961
   632
      | typ_of (_, Var (_, T)) = T
wenzelm@4961
   633
      | typ_of (bs, Bound i) = snd (nth_elem (i, bs) handle LIST _ =>
wenzelm@4961
   634
          raise TYPE ("Loose bound variable: B." ^ string_of_int i, [], [Bound i]))
wenzelm@4961
   635
      | typ_of (bs, Abs (x, T, body)) = T --> typ_of ((x, T) :: bs, body)
wenzelm@4961
   636
      | typ_of (bs, t $ u) =
wenzelm@4961
   637
          let val T = typ_of (bs, t) and U = typ_of (bs, u) in
wenzelm@4961
   638
            (case T of
wenzelm@4961
   639
              Type ("fun", [T1, T2]) =>
wenzelm@4961
   640
                if T1 = U then T2 else err_appl "Incompatible operand type." bs t T u U
wenzelm@4961
   641
            | _ => err_appl "Operator not of function type." bs t T u U)
wenzelm@4961
   642
          end;
wenzelm@4961
   643
wenzelm@4961
   644
  in typ_of ([], tm) end;
clasohm@0
   645
wenzelm@2979
   646
wenzelm@3975
   647
fun certify_term sg tm =
wenzelm@251
   648
  let
wenzelm@3969
   649
    val _ = check_stale sg;
wenzelm@3975
   650
    val tsig = tsig_of sg;
wenzelm@3969
   651
wenzelm@3975
   652
    fun show_const a T = quote a ^ " :: " ^ quote (string_of_typ sg T);
wenzelm@169
   653
wenzelm@4961
   654
    fun atom_err (errs, Const (a, T)) =
wenzelm@3975
   655
        (case const_type sg a of
wenzelm@4961
   656
          None => ("Undeclared constant " ^ show_const a T) :: errs
wenzelm@3975
   657
        | Some U =>
wenzelm@4961
   658
            if Type.typ_instance (tsig, T, U) then errs
wenzelm@4961
   659
            else ("Illegal type for constant " ^ show_const a T) :: errs)
wenzelm@4961
   660
      | atom_err (errs, Var ((x, i), _)) =
wenzelm@4961
   661
          if i < 0 then ("Negative index for Var " ^ quote x) :: errs else errs
wenzelm@4961
   662
      | atom_err (errs, _) = errs;
wenzelm@251
   663
wenzelm@251
   664
    val norm_tm =
wenzelm@2185
   665
      (case it_term_types (Type.typ_errors tsig) (tm, []) of
wenzelm@7068
   666
        [] => Type.norm_term tsig tm
wenzelm@3791
   667
      | errs => raise TYPE (cat_lines errs, [], [tm]));
wenzelm@8290
   668
    val _ = nodup_vars norm_tm;
wenzelm@251
   669
  in
wenzelm@4961
   670
    (case foldl_aterms atom_err ([], norm_tm) of
wenzelm@4961
   671
      [] => (norm_tm, type_check sg norm_tm, maxidx_of_term norm_tm)
wenzelm@3791
   672
    | errs => raise TYPE (cat_lines errs, [], [norm_tm]))
wenzelm@251
   673
  end;
wenzelm@251
   674
wenzelm@251
   675
wenzelm@583
   676
(** infer_types **)         (*exception ERROR*)
wenzelm@251
   677
wenzelm@2979
   678
(*
wenzelm@2979
   679
  def_type: partial map from indexnames to types (constrains Frees, Vars)
wenzelm@2979
   680
  def_sort: partial map from indexnames to sorts (constrains TFrees, TVars)
wenzelm@2979
   681
  used: list of already used type variables
wenzelm@2979
   682
  freeze: if true then generated parameters are turned into TFrees, else TVars
wenzelm@4249
   683
wenzelm@4249
   684
  termss: lists of alternative parses (only one combination should be type-correct)
wenzelm@4249
   685
  typs: expected types
wenzelm@2979
   686
*)
wenzelm@2979
   687
wenzelm@4249
   688
fun infer_types_simult sg def_type def_sort used freeze args =
wenzelm@251
   689
  let
wenzelm@3975
   690
    val tsig = tsig_of sg;
wenzelm@3810
   691
    val prt =
wenzelm@3810
   692
      setmp Syntax.show_brackets true
wenzelm@5175
   693
        (setmp NameSpace.long_names true (pretty_term sg));
wenzelm@5175
   694
    val prT = setmp NameSpace.long_names true (pretty_typ sg);
wenzelm@4249
   695
wenzelm@4249
   696
    val termss = foldr multiply (map fst args, [[]]);
wenzelm@4249
   697
    val typs =
wenzelm@4249
   698
      map (fn (_, T) => certify_typ sg T handle TYPE (msg, _, _) => error msg) args;
wenzelm@169
   699
wenzelm@4249
   700
    fun infer ts = OK
wenzelm@4249
   701
      (Type.infer_types prt prT tsig (const_type sg) def_type def_sort
wenzelm@4249
   702
        (intern_const sg) (intern_tycons sg) (intern_sort sg) used freeze typs ts)
wenzelm@4249
   703
      handle TYPE (msg, _, _) => Error msg;
clasohm@623
   704
wenzelm@4249
   705
    val err_results = map infer termss;
wenzelm@4249
   706
    val errs = mapfilter get_error err_results;
wenzelm@4249
   707
    val results = mapfilter get_ok err_results;
wenzelm@4249
   708
wenzelm@4249
   709
    val ambiguity = length termss;	(* FIXME !? *)
wenzelm@4249
   710
    (* FIXME to syntax.ML!? *)
wenzelm@4249
   711
    fun ambig_msg () =
wenzelm@4249
   712
      if ambiguity > 1 andalso ambiguity <= ! Syntax.ambiguity_level
wenzelm@4249
   713
      then
wenzelm@4249
   714
        error_msg "Got more than one parse tree.\n\
wenzelm@3805
   715
          \Retry with smaller Syntax.ambiguity_level for more information."
nipkow@952
   716
      else ();
wenzelm@4249
   717
  in
wenzelm@4249
   718
    if null results then (ambig_msg (); error (cat_lines errs))
wenzelm@4249
   719
    else if length results = 1 then
wenzelm@4249
   720
      (if ambiguity > ! Syntax.ambiguity_level then
wenzelm@4249
   721
        warning "Fortunately, only one parse tree is type correct.\n\
wenzelm@4249
   722
          \You may still want to disambiguate your grammar or your input."
wenzelm@4249
   723
      else (); hd results)
wenzelm@4249
   724
    else (ambig_msg (); error ("More than one term is type correct:\n" ^
wenzelm@4249
   725
      (cat_lines (map (Pretty.string_of o prt) (flat (map fst results))))))
wenzelm@4249
   726
  end;
clasohm@623
   727
wenzelm@4249
   728
wenzelm@4249
   729
fun infer_types sg def_type def_sort used freeze tsT =
wenzelm@4249
   730
  apfst hd (infer_types_simult sg def_type def_sort used freeze [tsT]);
wenzelm@251
   731
wenzelm@251
   732
wenzelm@8607
   733
(** read_def_terms **)
wenzelm@8607
   734
wenzelm@8607
   735
(*read terms, infer types*)
wenzelm@8607
   736
fun read_def_terms (sign, types, sorts) used freeze sTs =
wenzelm@8607
   737
  let
wenzelm@8607
   738
    val syn = #syn (rep_sg sign);
wenzelm@8607
   739
    fun read (s, T) =
wenzelm@8607
   740
      let val T' = certify_typ sign T handle TYPE (msg, _, _) => error msg
wenzelm@8607
   741
      in (Syntax.read syn T' s, T') end;
wenzelm@8607
   742
    val tsTs = map read sTs;
wenzelm@8607
   743
  in infer_types_simult sign types sorts used freeze tsTs end;
wenzelm@8607
   744
wenzelm@8607
   745
wenzelm@2979
   746
clasohm@623
   747
(** extend signature **)    (*exception ERROR*)
clasohm@623
   748
wenzelm@620
   749
(** signature extension functions **)  (*exception ERROR*)
wenzelm@386
   750
wenzelm@3791
   751
fun decls_of path name_of mfixs =
wenzelm@3810
   752
  map (fn (x, y, mx) => (full path (name_of x mx), y)) mfixs;
wenzelm@3791
   753
wenzelm@3791
   754
fun no_read _ _ _ decl = decl;
wenzelm@386
   755
wenzelm@386
   756
wenzelm@386
   757
(* add default sort *)
wenzelm@386
   758
wenzelm@3967
   759
fun ext_defsort int (syn, tsig, ctab, (path, spaces), data) S =
wenzelm@3791
   760
  (syn, Type.ext_tsig_defsort tsig (if int then intrn_sort spaces S else S),
wenzelm@3967
   761
    ctab, (path, spaces), data);
wenzelm@386
   762
wenzelm@386
   763
wenzelm@386
   764
(* add type constructors *)
wenzelm@386
   765
wenzelm@3967
   766
fun ext_types (syn, tsig, ctab, (path, spaces), data) types =
wenzelm@3791
   767
  let val decls = decls_of path Syntax.type_name types in
wenzelm@3791
   768
    (Syntax.extend_type_gram syn types,
wenzelm@3791
   769
      Type.ext_tsig_types tsig decls, ctab,
wenzelm@3967
   770
      (path, add_names spaces typeK (map fst decls)), data)
wenzelm@3791
   771
  end;
wenzelm@386
   772
wenzelm@4844
   773
fun ext_nonterminals sg nonterms =
wenzelm@4844
   774
  ext_types sg (map (fn n => (n, 0, Syntax.NoSyn)) nonterms);
wenzelm@4844
   775
wenzelm@386
   776
wenzelm@386
   777
(* add type abbreviations *)
wenzelm@386
   778
wenzelm@3791
   779
fun read_abbr syn tsig spaces (t, vs, rhs_src) =
wenzelm@4227
   780
  (t, vs, rd_raw_typ syn tsig spaces (K None) rhs_src)
wenzelm@386
   781
    handle ERROR => error ("in type abbreviation " ^ t);
wenzelm@386
   782
wenzelm@3967
   783
fun ext_abbrs rd_abbr (syn, tsig, ctab, (path, spaces), data) abbrs =
wenzelm@386
   784
  let
wenzelm@386
   785
    fun mfix_of (t, vs, _, mx) = (t, length vs, mx);
wenzelm@3791
   786
    val syn' = Syntax.extend_type_gram syn (map mfix_of abbrs);
wenzelm@386
   787
wenzelm@3791
   788
    val abbrs' =
wenzelm@3791
   789
      map (fn (t, vs, rhs, mx) =>
wenzelm@3810
   790
        (full path (Syntax.type_name t mx), vs, rhs)) abbrs;
wenzelm@3805
   791
    val spaces' = add_names spaces typeK (map #1 abbrs');
wenzelm@3805
   792
    val decls = map (rd_abbr syn' tsig spaces') abbrs';
wenzelm@386
   793
  in
wenzelm@3967
   794
    (syn', Type.ext_tsig_abbrs tsig decls, ctab, (path, spaces'), data)
wenzelm@386
   795
  end;
wenzelm@386
   796
wenzelm@3791
   797
fun ext_tyabbrs abbrs = ext_abbrs read_abbr abbrs;
wenzelm@3791
   798
fun ext_tyabbrs_i abbrs = ext_abbrs no_read abbrs;
wenzelm@386
   799
wenzelm@386
   800
wenzelm@386
   801
(* add type arities *)
wenzelm@386
   802
wenzelm@3967
   803
fun ext_arities int (syn, tsig, ctab, (path, spaces), data) arities =
wenzelm@386
   804
  let
wenzelm@3791
   805
    fun intrn_arity (c, Ss, S) =
wenzelm@3791
   806
      (intrn spaces typeK c, map (intrn_sort spaces) Ss, intrn_sort spaces S);
wenzelm@3791
   807
    val intrn = if int then map intrn_arity else I;
wenzelm@3791
   808
    val tsig' = Type.ext_tsig_arities tsig (intrn arities);
wenzelm@3791
   809
    val log_types = Type.logical_types tsig';
wenzelm@386
   810
  in
wenzelm@3967
   811
    (Syntax.extend_log_types syn log_types, tsig', ctab, (path, spaces), data)
wenzelm@386
   812
  end;
wenzelm@386
   813
wenzelm@386
   814
wenzelm@386
   815
(* add term constants and syntax *)
wenzelm@386
   816
wenzelm@3805
   817
fun const_name path c mx =
wenzelm@3810
   818
  full path (Syntax.const_name c mx);
wenzelm@3805
   819
wenzelm@386
   820
fun err_in_const c =
wenzelm@386
   821
  error ("in declaration of constant " ^ quote c);
wenzelm@386
   822
wenzelm@386
   823
fun err_dup_consts cs =
wenzelm@386
   824
  error ("Duplicate declaration of constant(s) " ^ commas_quote cs);
wenzelm@386
   825
wenzelm@251
   826
wenzelm@3805
   827
fun read_const syn tsig (path, spaces) (c, ty_src, mx) =
wenzelm@4227
   828
  (c, rd_raw_typ syn tsig spaces (K None) ty_src, mx)
wenzelm@3805
   829
    handle ERROR => err_in_const (const_name path c mx);
wenzelm@386
   830
wenzelm@3967
   831
fun ext_cnsts rd_const syn_only prmode (syn, tsig, ctab, (path, spaces), data) raw_consts =
wenzelm@386
   832
  let
wenzelm@2979
   833
    fun prep_const (c, ty, mx) =
wenzelm@3791
   834
      (c, compress_type (Type.varifyT (Type.cert_typ tsig (Type.no_tvars ty))), mx)
wenzelm@3791
   835
        handle TYPE (msg, _, _) =>
wenzelm@3805
   836
          (error_msg msg; err_in_const (const_name path c mx));
wenzelm@386
   837
wenzelm@3805
   838
    val consts = map (prep_const o rd_const syn tsig (path, spaces)) raw_consts;
wenzelm@386
   839
    val decls =
wenzelm@386
   840
      if syn_only then []
wenzelm@3791
   841
      else decls_of path Syntax.const_name consts;
wenzelm@386
   842
  in
wenzelm@2197
   843
    (Syntax.extend_const_gram syn prmode consts, tsig,
wenzelm@4489
   844
      Symtab.extend (ctab, decls)
wenzelm@3791
   845
        handle Symtab.DUPS cs => err_dup_consts cs,
wenzelm@3967
   846
      (path, add_names spaces constK (map fst decls)), data)
wenzelm@386
   847
  end;
wenzelm@386
   848
wenzelm@4007
   849
fun ext_consts_i sg = ext_cnsts no_read false ("", true) sg;
wenzelm@4007
   850
fun ext_consts sg = ext_cnsts read_const false ("", true) sg;
wenzelm@4007
   851
fun ext_syntax_i sg = ext_cnsts no_read true ("", true) sg;
wenzelm@4007
   852
fun ext_syntax sg = ext_cnsts read_const true ("", true) sg;
wenzelm@3791
   853
fun ext_modesyntax_i sg (prmode, consts) = ext_cnsts no_read true prmode sg consts;
wenzelm@2197
   854
fun ext_modesyntax sg (prmode, consts) = ext_cnsts read_const true prmode sg consts;
wenzelm@386
   855
wenzelm@386
   856
wenzelm@386
   857
(* add type classes *)
wenzelm@386
   858
wenzelm@386
   859
fun const_of_class c = c ^ "_class";
wenzelm@386
   860
wenzelm@386
   861
fun class_of_const c_class =
wenzelm@386
   862
  let
wenzelm@3791
   863
    val c = implode (take (size c_class - size "_class", explode c_class));
wenzelm@386
   864
  in
wenzelm@386
   865
    if const_of_class c = c_class then c
wenzelm@3791
   866
    else raise TERM ("class_of_const: bad name " ^ quote c_class, [])
wenzelm@386
   867
  end;
wenzelm@386
   868
wenzelm@386
   869
wenzelm@3967
   870
fun ext_classes int (syn, tsig, ctab, (path, spaces), data) classes =
wenzelm@386
   871
  let
wenzelm@562
   872
    val names = map fst classes;
wenzelm@386
   873
    val consts =
wenzelm@386
   874
      map (fn c => (const_of_class c, a_itselfT --> propT, NoSyn)) names;
wenzelm@3791
   875
wenzelm@3810
   876
    val full_names = map (full path) names;
wenzelm@3791
   877
    val spaces' = add_names spaces classK full_names;
wenzelm@3791
   878
    val intrn = if int then map (intrn_class spaces') else I;
wenzelm@3791
   879
    val classes' =
wenzelm@3791
   880
      ListPair.map (fn (c, (_, cs)) => (c, intrn cs)) (full_names, classes);
wenzelm@386
   881
  in
wenzelm@386
   882
    ext_consts_i
wenzelm@3791
   883
      (Syntax.extend_consts syn names,
wenzelm@3967
   884
        Type.ext_tsig_classes tsig classes', ctab, (path, spaces'), data)
wenzelm@3791
   885
    consts
wenzelm@386
   886
  end;
wenzelm@386
   887
wenzelm@386
   888
wenzelm@2963
   889
(* add to classrel *)
wenzelm@421
   890
wenzelm@3967
   891
fun ext_classrel int (syn, tsig, ctab, (path, spaces), data) pairs =
wenzelm@3791
   892
  let val intrn = if int then map (pairself (intrn_class spaces)) else I in
wenzelm@3967
   893
    (syn, Type.ext_tsig_classrel tsig (intrn pairs), ctab, (path, spaces), data)
wenzelm@3791
   894
  end;
wenzelm@421
   895
wenzelm@421
   896
wenzelm@4619
   897
(* add translation rules *)
wenzelm@4619
   898
wenzelm@4619
   899
fun ext_trrules (syn, tsig, ctab, (path, spaces), data) args =
wenzelm@4619
   900
  (Syntax.extend_trrules syn
wenzelm@4619
   901
    (map (Syntax.map_trrule (fn (root, str) => (intrn spaces typeK root, str))) args),
wenzelm@4619
   902
      tsig, ctab, (path, spaces), data);
wenzelm@4619
   903
wenzelm@4619
   904
wenzelm@1159
   905
(* add to syntax *)
wenzelm@386
   906
wenzelm@3967
   907
fun ext_syn extfun (syn, tsig, ctab, names, data) args =
wenzelm@3967
   908
  (extfun syn args, tsig, ctab, names, data);
wenzelm@3791
   909
wenzelm@3791
   910
wenzelm@3791
   911
(* add to path *)
wenzelm@3791
   912
wenzelm@4844
   913
fun ext_path (syn, tsig, ctab, (path, spaces), data) elems =
wenzelm@3791
   914
  let
wenzelm@3791
   915
    val path' =
wenzelm@4844
   916
      if elems = ".." andalso not (null path) then fst (split_last path)
wenzelm@4844
   917
      else if elems = "/" then []
wenzelm@4844
   918
      else path @ NameSpace.unpack elems;
wenzelm@3791
   919
  in
wenzelm@3967
   920
    (syn, tsig, ctab, (path', spaces), data)
wenzelm@3791
   921
  end;      
wenzelm@3791
   922
wenzelm@3791
   923
wenzelm@3791
   924
(* add to name space *)
wenzelm@3791
   925
wenzelm@3967
   926
fun ext_space (syn, tsig, ctab, (path, spaces), data) (kind, names) =
wenzelm@3967
   927
  (syn, tsig, ctab, (path, add_names spaces kind names), data);
wenzelm@386
   928
wenzelm@386
   929
wenzelm@3967
   930
(* signature data *)
wenzelm@386
   931
wenzelm@6546
   932
fun ext_init_data sg (syn, tsig, ctab, names, data) (kind, (e, cp, ext, mrg, prt)) =
wenzelm@6546
   933
  (syn, tsig, ctab, names, init_data_sg sg data kind e cp ext mrg prt);
wenzelm@386
   934
wenzelm@4998
   935
fun ext_put_data sg (syn, tsig, ctab, names, data) (kind, f, x) =
wenzelm@4998
   936
  (syn, tsig, ctab, names, put_data_sg sg data kind f x);
wenzelm@386
   937
wenzelm@386
   938
wenzelm@6546
   939
fun copy_data (k, (e, mths as (cp, _, _, _))) =
wenzelm@6961
   940
  (k, (cp e handle exn => err_method "copy" (Object.name_of_kind k) exn, mths));
wenzelm@6546
   941
wenzelm@6546
   942
fun copy (sg as Sg ({id = _, stamps}, {self, tsig, const_tab, syn, path, spaces, data})) =
wenzelm@6546
   943
  let
wenzelm@6546
   944
    val _ = check_stale sg;
wenzelm@6546
   945
    val self' = SgRef (Some (ref sg));
wenzelm@6546
   946
    val Data tab = data;
wenzelm@6546
   947
    val data' = Data (Symtab.map copy_data tab);
wenzelm@6546
   948
  in create_sign self' stamps "#" (syn, tsig, const_tab, (path, spaces), data') end;
wenzelm@6546
   949
wenzelm@6546
   950
wenzelm@386
   951
(* the external interfaces *)
wenzelm@386
   952
wenzelm@4998
   953
val add_classes       = extend_sign true (ext_classes true) "#";
wenzelm@4998
   954
val add_classes_i     = extend_sign true (ext_classes false) "#";
wenzelm@4998
   955
val add_classrel      = extend_sign true (ext_classrel true) "#";
wenzelm@4998
   956
val add_classrel_i    = extend_sign true (ext_classrel false) "#";
wenzelm@4998
   957
val add_defsort       = extend_sign true (ext_defsort true) "#";
wenzelm@4998
   958
val add_defsort_i     = extend_sign true (ext_defsort false) "#";
wenzelm@4998
   959
val add_types         = extend_sign true ext_types "#";
wenzelm@4998
   960
val add_nonterminals  = extend_sign true ext_nonterminals "#";
wenzelm@4998
   961
val add_tyabbrs       = extend_sign true ext_tyabbrs "#";
wenzelm@4998
   962
val add_tyabbrs_i     = extend_sign true ext_tyabbrs_i "#";
wenzelm@4998
   963
val add_arities       = extend_sign true (ext_arities true) "#";
wenzelm@4998
   964
val add_arities_i     = extend_sign true (ext_arities false) "#";
wenzelm@4998
   965
val add_consts        = extend_sign true ext_consts "#";
wenzelm@4998
   966
val add_consts_i      = extend_sign true ext_consts_i "#";
wenzelm@4998
   967
val add_syntax        = extend_sign true ext_syntax "#";
wenzelm@4998
   968
val add_syntax_i      = extend_sign true ext_syntax_i "#";
wenzelm@4998
   969
val add_modesyntax    = extend_sign true ext_modesyntax "#";
wenzelm@4998
   970
val add_modesyntax_i  = extend_sign true ext_modesyntax_i "#";
wenzelm@4998
   971
val add_trfuns        = extend_sign true (ext_syn Syntax.extend_trfuns) "#";
wenzelm@4998
   972
val add_trfunsT       = extend_sign true (ext_syn Syntax.extend_trfunsT) "#";
wenzelm@4998
   973
val add_tokentrfuns   = extend_sign true (ext_syn Syntax.extend_tokentrfuns) "#";
wenzelm@4998
   974
val add_trrules       = extend_sign true ext_trrules "#";
wenzelm@4998
   975
val add_trrules_i     = extend_sign true (ext_syn Syntax.extend_trrules_i) "#";
wenzelm@4998
   976
val add_path          = extend_sign true ext_path "#";
wenzelm@4998
   977
val add_space         = extend_sign true ext_space "#";
wenzelm@4998
   978
fun init_data arg sg  = extend_sign true (ext_init_data sg) "#" arg sg;
wenzelm@4998
   979
fun put_data k f x sg = extend_sign true (ext_put_data sg) "#" (k, f, x) sg;
wenzelm@4998
   980
fun add_name name sg  = extend_sign true K name () sg;
wenzelm@4998
   981
fun prep_ext sg       = extend_sign false K "#" () sg;
wenzelm@386
   982
wenzelm@386
   983
wenzelm@3867
   984
wenzelm@4017
   985
(** merge signatures **)    	(*exception TERM*)
wenzelm@3867
   986
wenzelm@4228
   987
(* merge_stamps *)
wenzelm@4228
   988
wenzelm@4228
   989
fun merge_stamps stamps1 stamps2 =
wenzelm@4228
   990
  let val stamps = merge_rev_lists stamps1 stamps2 in
wenzelm@4228
   991
    (case duplicates (map ! stamps) of
wenzelm@4228
   992
      [] => stamps
wenzelm@4228
   993
    | dups => raise TERM ("Attempt to merge different versions of theories "
wenzelm@4228
   994
        ^ commas_quote dups, []))
wenzelm@4228
   995
  end;
wenzelm@4228
   996
wenzelm@4228
   997
wenzelm@4627
   998
(* implicit merge -- trivial only *)
wenzelm@3877
   999
wenzelm@4228
  1000
fun merge_refs (sgr1 as SgRef (Some (ref (sg1 as Sg ({stamps = s1, ...}, _)))),
wenzelm@4228
  1001
        sgr2 as SgRef (Some (ref (sg2 as Sg ({stamps = s2, ...}, _))))) =
wenzelm@3967
  1002
      if fast_subsig (sg2, sg1) then sgr1
wenzelm@3967
  1003
      else if fast_subsig (sg1, sg2) then sgr2
wenzelm@3967
  1004
      else if subsig (sg2, sg1) then sgr1
wenzelm@3967
  1005
      else if subsig (sg1, sg2) then sgr2
wenzelm@4228
  1006
      else (merge_stamps s1 s2; (*check for different versions*)
wenzelm@4228
  1007
        raise TERM ("Attempt to do non-trivial merge of signatures", []))
wenzelm@3967
  1008
  | merge_refs _ = sys_error "Sign.merge_refs";
wenzelm@3867
  1009
wenzelm@4627
  1010
val merge = deref o merge_refs o pairself self_ref;
wenzelm@4627
  1011
wenzelm@3867
  1012
wenzelm@6961
  1013
(* proper merge *)		(*exception TERM/ERROR*)
wenzelm@143
  1014
wenzelm@6961
  1015
fun nontriv_merge (sg1, sg2) =
wenzelm@3967
  1016
  if subsig (sg2, sg1) then sg1
wenzelm@251
  1017
  else if subsig (sg1, sg2) then sg2
wenzelm@386
  1018
  else if is_draft sg1 orelse is_draft sg2 then
wenzelm@3967
  1019
    raise TERM ("Attempt to merge draft signatures", [])
wenzelm@251
  1020
  else
wenzelm@251
  1021
    (*neither is union already; must form union*)
wenzelm@251
  1022
    let
wenzelm@3975
  1023
      val Sg ({id = _, stamps = stamps1}, {self = _, tsig = tsig1, const_tab = const_tab1,
wenzelm@3975
  1024
        syn = syn1, path = _, spaces = spaces1, data = data1}) = sg1;
wenzelm@3975
  1025
      val Sg ({id = _, stamps = stamps2}, {self = _, tsig = tsig2, const_tab = const_tab2,
wenzelm@3975
  1026
        syn = syn2, path = _, spaces = spaces2, data = data2}) = sg2;
wenzelm@386
  1027
wenzelm@3967
  1028
      val id = ref "";
wenzelm@3975
  1029
      val self_ref = ref sg1;                   (*dummy value*)
wenzelm@3967
  1030
      val self = SgRef (Some self_ref);
wenzelm@402
  1031
wenzelm@4228
  1032
      val stamps = merge_stamps stamps1 stamps2;
wenzelm@2185
  1033
      val tsig = Type.merge_tsigs (tsig1, tsig2);
wenzelm@251
  1034
      val const_tab = Symtab.merge (op =) (const_tab1, const_tab2)
wenzelm@386
  1035
        handle Symtab.DUPS cs =>
wenzelm@3791
  1036
          raise TERM ("Incompatible types for constant(s) " ^ commas_quote cs, []);
wenzelm@386
  1037
      val syn = Syntax.merge_syntaxes syn1 syn2;
wenzelm@3791
  1038
wenzelm@3967
  1039
      val path = [];
wenzelm@3791
  1040
      val kinds = distinct (map fst (spaces1 @ spaces2));
wenzelm@3791
  1041
      val spaces =
wenzelm@3791
  1042
        kinds ~~
wenzelm@3791
  1043
          ListPair.map NameSpace.merge
wenzelm@3791
  1044
            (map (space_of spaces1) kinds, map (space_of spaces2) kinds);
wenzelm@3867
  1045
wenzelm@4256
  1046
      val data = merge_data (data1, data2);
wenzelm@3967
  1047
wenzelm@3967
  1048
      val sign = make_sign (id, self, tsig, const_tab, syn, path, spaces, data, stamps);
wenzelm@251
  1049
    in
wenzelm@3967
  1050
      self_ref := sign; sign
wenzelm@251
  1051
    end;
wenzelm@143
  1052
clasohm@0
  1053
clasohm@0
  1054
wenzelm@3995
  1055
(** partial Pure signature **)
clasohm@0
  1056
wenzelm@3967
  1057
val dummy_sg = make_sign (ref "", SgRef None, Type.tsig0,
wenzelm@4489
  1058
  Symtab.empty, Syntax.pure_syn, [], [], empty_data, []);
wenzelm@3967
  1059
wenzelm@3995
  1060
val pre_pure =
wenzelm@3967
  1061
  create_sign (SgRef (Some (ref dummy_sg))) [] "#"
wenzelm@4489
  1062
    (Syntax.pure_syn, Type.tsig0, Symtab.empty, ([], []), empty_data);
clasohm@0
  1063
wenzelm@3791
  1064
clasohm@0
  1065
end;