src/Pure/type.ML
author wenzelm
Sat, 21 Jan 2006 23:02:14 +0100
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child 18928 042608ffa2ec
permissions -rw-r--r--
simplified type attribute;
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(*  Title:      Pure/type.ML
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    ID:         $Id$
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    Author:     Tobias Nipkow, Lawrence C Paulson, and Markus Wenzel
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Type signatures and certified types, special treatment of type vars,
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matching and unification of types, extend and merge type signatures.
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*)
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signature TYPE =
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sig
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  (*type signatures and certified types*)
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  datatype decl =
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    LogicalType of int |
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    Abbreviation of string list * typ * bool |
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    Nonterminal
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  type tsig
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  val rep_tsig: tsig ->
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   {classes: NameSpace.T * Sorts.classes,
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    default: sort,
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    types: (decl * stamp) NameSpace.table,
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    arities: Sorts.arities,
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    log_types: string list,
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    witness: (typ * sort) option}
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  val empty_tsig: tsig
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  val classes: tsig -> class list
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  val defaultS: tsig -> sort
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  val logical_types: tsig -> string list
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  val universal_witness: tsig -> (typ * sort) option
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  val eq_sort: tsig -> sort * sort -> bool
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  val subsort: tsig -> sort * sort -> bool
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  val of_sort: tsig -> typ * sort -> bool
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  val cert_class: tsig -> class -> class
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  val cert_sort: tsig -> sort -> sort
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  val witness_sorts: tsig -> sort list -> sort list -> (typ * sort) list
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  val cert_typ: tsig -> typ -> typ
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  val cert_typ_syntax: tsig -> typ -> typ
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  val cert_typ_abbrev: tsig -> typ -> typ
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  (*special treatment of type vars*)
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  val strip_sorts: typ -> typ
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  val no_tvars: typ -> typ
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  val varifyT: typ -> typ
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  val unvarifyT: typ -> typ
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  val varify: term * (string * sort) list -> term * ((string * sort) * indexname) list
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  val freeze_thaw_type: typ -> typ * (typ -> typ)
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  val freeze_type: typ -> typ
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  val freeze_thaw: term -> term * (term -> term)
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  val freeze: term -> term
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  (*matching and unification*)
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  exception TYPE_MATCH
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  type tyenv
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  val lookup: tyenv * (indexname * sort) -> typ option
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  val typ_match: tsig -> typ * typ -> tyenv -> tyenv
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  val typ_instance: tsig -> typ * typ -> bool
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  val raw_match: typ * typ -> tyenv -> tyenv
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  val raw_instance: typ * typ -> bool
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  exception TUNIFY
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  val unify: tsig -> typ * typ -> tyenv * int -> tyenv * int
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  val raw_unify: typ * typ -> tyenv -> tyenv
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  val could_unify: typ * typ -> bool
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  val eq_type: tyenv -> typ * typ -> bool
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  (*extend and merge type signatures*)
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  val add_classes: Pretty.pp -> NameSpace.naming -> (bstring * class list) list -> tsig -> tsig
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  val hide_classes: bool -> string list -> tsig -> tsig
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  val add_classrel: Pretty.pp -> (class * class) list -> tsig -> tsig
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  val set_defsort: sort -> tsig -> tsig
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  val add_types: NameSpace.naming -> (bstring * int) list -> tsig -> tsig
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  val add_abbrevs: NameSpace.naming -> (string * string list * typ) list -> tsig -> tsig
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  val add_nonterminals: NameSpace.naming -> string list -> tsig -> tsig
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  val hide_types: bool -> string list -> tsig -> tsig
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  val add_arities: Pretty.pp -> arity list -> tsig -> tsig
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  val merge_tsigs: Pretty.pp -> tsig * tsig -> tsig
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end;
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structure Type: TYPE =
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struct
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(** type signatures and certified types **)
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(* type declarations *)
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datatype decl =
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  LogicalType of int |
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  Abbreviation of string list * typ * bool |
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  Nonterminal;
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fun str_of_decl (LogicalType _) = "logical type constructor"
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  | str_of_decl (Abbreviation _) = "type abbreviation"
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  | str_of_decl Nonterminal = "syntactic type";
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(* type tsig *)
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datatype tsig =
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  TSig of {
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    classes: NameSpace.T * Sorts.classes,   (*declared classes with proper subclass relation*)
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    default: sort,                          (*default sort on input*)
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    types: (decl * stamp) NameSpace.table,  (*declared types*)
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    arities: Sorts.arities,                 (*image specification of types wrt. sorts*)
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    log_types: string list,                 (*logical types sorted by number of arguments*)
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    witness: (typ * sort) option};          (*witness for non-emptiness of strictest sort*)
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fun rep_tsig (TSig comps) = comps;
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fun make_tsig (classes, default, types, arities, log_types, witness) =
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  TSig {classes = classes, default = default, types = types, arities = arities,
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    log_types = log_types, witness = witness};
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fun build_tsig (classes, default, types, arities) =
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  let
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    val log_types =
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      Symtab.fold (fn (c, (LogicalType n, _)) => cons (c, n) | _ => I) (snd types) []
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      |> Library.sort (Library.int_ord o pairself snd) |> map fst;
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    val witness =
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      (case Sorts.witness_sorts (snd classes, arities) log_types [] [Graph.keys (snd classes)] of
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        [w] => SOME w | _ => NONE);
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  in make_tsig (classes, default, types, arities, log_types, witness) end;
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fun map_tsig f (TSig {classes, default, types, arities, log_types = _, witness = _}) =
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  build_tsig (f (classes, default, types, arities));
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val empty_tsig =
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  build_tsig ((NameSpace.empty, Graph.empty), [], NameSpace.empty_table, Symtab.empty);
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(* classes and sorts *)
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fun classes (TSig {classes = (_, C), ...}) = Graph.keys C;
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fun defaultS (TSig {default, ...}) = default;
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fun logical_types (TSig {log_types, ...}) = log_types;
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fun universal_witness (TSig {witness, ...}) = witness;
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fun eq_sort (TSig {classes, ...}) = Sorts.sort_eq (#2 classes);
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fun subsort (TSig {classes, ...}) = Sorts.sort_le (#2 classes);
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fun of_sort (TSig {classes, arities, ...}) = Sorts.of_sort (#2 classes, arities);
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fun cert_class (TSig {classes, ...}) = Sorts.certify_class (#2 classes);
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fun cert_sort (TSig {classes, ...}) = Sorts.certify_sort (#2 classes);
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fun witness_sorts (tsig as TSig {classes, arities, log_types, ...}) =
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  Sorts.witness_sorts (#2 classes, arities) log_types;
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(* certified types *)
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fun bad_nargs t = "Bad number of arguments for type constructor: " ^ quote t;
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fun undecl_type c = "Undeclared type constructor: " ^ quote c;
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local
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fun inst_typ env (Type (c, Ts)) = Type (c, map (inst_typ env) Ts)
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  | inst_typ env (T as TFree (x, _)) = if_none (AList.lookup (op =) env x) T
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  | inst_typ _ T = T;
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fun certify_typ normalize syntax tsig ty =
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  let
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    val TSig {classes = (_, classes), types = (_, types), ...} = tsig;
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    fun err msg = raise TYPE (msg, [ty], []);
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    val check_syntax =
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      if syntax then K ()
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      else fn c => err ("Illegal occurrence of syntactic type: " ^ quote c);
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    fun cert (T as Type (c, Ts)) =
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          let
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            val Ts' = map cert Ts;
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            fun nargs n = if length Ts <> n then err (bad_nargs c) else ();
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          in
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            (case Symtab.lookup types c of
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              SOME (LogicalType n, _) => (nargs n; Type (c, Ts'))
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            | SOME (Abbreviation (vs, U, syn), _) => (nargs (length vs);
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                if syn then check_syntax c else ();
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                if normalize then inst_typ (vs ~~ Ts') U
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                else Type (c, Ts'))
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            | SOME (Nonterminal, _) => (nargs 0; check_syntax c; T)
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            | NONE => err (undecl_type c))
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          end
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      | cert (TFree (x, S)) = TFree (x, Sorts.certify_sort classes S)
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      | cert (TVar (xi as (_, i), S)) =
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          if i < 0 then
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            err ("Malformed type variable: " ^ quote (Term.string_of_vname xi))
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          else TVar (xi, Sorts.certify_sort classes S);
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    val ty' = cert ty;
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  in if ty = ty' then ty else ty' end;  (*avoid copying of already normal type*)
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in
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val cert_typ        = certify_typ true false;
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val cert_typ_syntax = certify_typ true true;
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val cert_typ_abbrev = certify_typ false true;
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end;
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(** special treatment of type vars **)
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(* strip_sorts *)
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fun strip_sorts (Type (a, Ts)) = Type (a, map strip_sorts Ts)
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  | strip_sorts (TFree (x, _)) = TFree (x, [])
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  | strip_sorts (TVar (xi, _)) = TVar (xi, []);
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(* no_tvars *)
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fun no_tvars T =
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  (case typ_tvars T of [] => T
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  | vs => raise TYPE ("Illegal schematic type variable(s): " ^
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      commas_quote (map (Term.string_of_vname o #1) vs), [T], []));
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(* varify, unvarify *)
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val varifyT = map_type_tfree (fn (a, S) => TVar ((a, 0), S));
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val unvarifyT = map_type_tvar (fn ((a, 0), S) => TFree (a, S) | v => TVar v);
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fun varify (t, fixed) =
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  let
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    val fs = add_term_tfrees (t, []) \\ fixed;
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    val ixns = add_term_tvar_ixns (t, []);
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    val fmap = fs ~~ map (rpair 0) (variantlist (map fst fs, map #1 ixns))
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    fun thaw (f as (a, S)) =
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      (case AList.lookup (op =) fmap f of
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        NONE => TFree f
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      | SOME xi => TVar (xi, S));
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  in (map_term_types (map_type_tfree thaw) t, fmap) end;
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(* freeze_thaw: freeze TVars in a term; return the "thaw" inverse *)
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local
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fun new_name (ix, (pairs, used)) =
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  let val v = variant used (string_of_indexname ix)
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  in ((ix, v) :: pairs, v :: used) end;
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fun freeze_one alist (ix, sort) =
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  TFree (the (AList.lookup (op =) alist ix), sort)
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    handle Option =>
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      raise TYPE ("Failure during freezing of ?" ^ string_of_indexname ix, [], []);
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fun thaw_one alist (a, sort) = TVar (the (AList.lookup (op =) alist a), sort)
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  handle Option => TFree (a, sort);
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in
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284ee538991c export freeze_thaw_type;
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(*this sort of code could replace unvarifyT*)
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fun freeze_thaw_type T =
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  let
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    val used = add_typ_tfree_names (T, [])
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    and tvars = map #1 (add_typ_tvars (T, []));
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    val (alist, _) = foldr new_name ([], used) tvars;
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  in (map_type_tvar (freeze_one alist) T, map_type_tfree (thaw_one (map swap alist))) end;
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val freeze_type = #1 o freeze_thaw_type;
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fun freeze_thaw t =
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  let
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    val used = it_term_types add_typ_tfree_names (t, [])
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    and tvars = map #1 (it_term_types add_typ_tvars (t, []));
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    val (alist, _) = foldr new_name ([], used) tvars;
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  in
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    (case alist of
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      [] => (t, fn x => x) (*nothing to do!*)
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    | _ => (map_term_types (map_type_tvar (freeze_one alist)) t,
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      map_term_types (map_type_tfree (thaw_one (map swap alist)))))
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  end;
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val freeze = #1 o freeze_thaw;
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end;
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256
b401c3d06024 (this is a preliminary release)
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(** matching and unification of types **)
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type tyenv = (sort * typ) Vartab.table;
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fun tvar_clash ixn S S' = raise TYPE ("Type variable " ^
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  quote (Term.string_of_vname ixn) ^ " has two distinct sorts",
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  [TVar (ixn, S), TVar (ixn, S')], []);
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fun lookup (tye, (ixn, S)) =
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  (case Vartab.lookup tye ixn of
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    NONE => NONE
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  | SOME (S', T) => if S = S' then SOME T else tvar_clash ixn S S');
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(* matching *)
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exception TYPE_MATCH;
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fun typ_match tsig =
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  let
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    fun match (TVar (v, S), T) subs =
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          (case lookup (subs, (v, S)) of
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            NONE =>
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              if of_sort tsig (T, S) then Vartab.update_new (v, (S, T)) subs
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              else raise TYPE_MATCH
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          | SOME U => if U = T then subs else raise TYPE_MATCH)
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      | match (Type (a, Ts), Type (b, Us)) subs =
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          if a <> b then raise TYPE_MATCH
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          else matches (Ts, Us) subs
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      | match (TFree x, TFree y) subs =
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          if x = y then subs else raise TYPE_MATCH
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      | match _ _ = raise TYPE_MATCH
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    and matches (T :: Ts, U :: Us) subs = matches (Ts, Us) (match (T, U) subs)
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      | matches _ subs = subs;
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  in match end;
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fun typ_instance tsig (T, U) =
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  (typ_match tsig (U, T) Vartab.empty; true) handle TYPE_MATCH => false;
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(*purely structural matching*)
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fun raw_match (TVar (v, S), T) subs =
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      (case lookup (subs, (v, S)) of
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        NONE => Vartab.update_new (v, (S, T)) subs
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      | SOME U => if U = T then subs else raise TYPE_MATCH)
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  | raw_match (Type (a, Ts), Type (b, Us)) subs =
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      if a <> b then raise TYPE_MATCH
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      else raw_matches (Ts, Us) subs
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  | raw_match (TFree x, TFree y) subs =
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      if x = y then subs else raise TYPE_MATCH
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  | raw_match _ _ = raise TYPE_MATCH
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and raw_matches (T :: Ts, U :: Us) subs = raw_matches (Ts, Us) (raw_match (T, U) subs)
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  | raw_matches _ subs = subs;
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fun raw_instance (T, U) =
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  (raw_match (U, T) Vartab.empty; true) handle TYPE_MATCH => false;
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(* unification *)
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exception TUNIFY;
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(*occurs_check*)
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fun occurs v tye =
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  let
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    fun occ (Type (_, Ts)) = exists occ Ts
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      | occ (TFree _) = false
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      | occ (TVar (w, S)) =
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          eq_ix (v, w) orelse
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            (case lookup (tye, (w, S)) of
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   348
              NONE => false
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            | SOME U => occ U);
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  in occ end;
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(*chase variable assignments; if devar returns a type var then it must be unassigned*)
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fun devar tye (T as TVar v) =
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      (case lookup (tye, v) of
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        SOME U => devar tye U
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      | NONE => T)
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  | devar tye T = T;
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(*order-sorted unification*)
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   360
fun unify (tsig as TSig {classes = (_, classes), arities, ...}) TU (tyenv, maxidx) =
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  let
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   362
    val tyvar_count = ref maxidx;
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   363
    fun gen_tyvar S = TVar (("'a", inc tyvar_count), S);
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   364
557a11310988 moved classes / sorts to sorts.ML;
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   365
    fun mg_domain a S =
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      Sorts.mg_domain (classes, arities) a S handle Sorts.DOMAIN _ => raise TUNIFY;
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   368
    fun meet (_, []) tye = tye
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   369
      | meet (TVar (xi, S'), S) tye =
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          if Sorts.sort_le classes (S', S) then tye
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   371
          else Vartab.update_new
17221
6cd180204582 curried_lookup/update;
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   372
            (xi, (S', gen_tyvar (Sorts.inter_sort classes (S', S)))) tye
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      | meet (TFree (_, S'), S) tye =
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          if Sorts.sort_le classes (S', S) then tye
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   375
          else raise TUNIFY
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   376
      | meet (Type (a, Ts), S) tye = meets (Ts, mg_domain a S) tye
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   377
    and meets (T :: Ts, S :: Ss) tye = meets (Ts, Ss) (meet (devar tye T, S) tye)
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   378
      | meets _ tye = tye;
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   380
    fun unif (ty1, ty2) tye =
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   381
      (case (devar tye ty1, devar tye ty2) of
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557a11310988 moved classes / sorts to sorts.ML;
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   382
        (T as TVar (v, S1), U as TVar (w, S2)) =>
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   383
          if eq_ix (v, w) then
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diff changeset
   384
            if S1 = S2 then tye else tvar_clash v S1 S2
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   385
          else if Sorts.sort_le classes (S1, S2) then
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
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   386
            Vartab.update_new (w, (S2, T)) tye
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   387
          else if Sorts.sort_le classes (S2, S1) then
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
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   388
            Vartab.update_new (v, (S1, U)) tye
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   389
          else
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diff changeset
   390
            let val S = gen_tyvar (Sorts.inter_sort classes (S1, S2)) in
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
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diff changeset
   391
              Vartab.update_new (v, (S1, S)) (Vartab.update_new (w, (S2, S)) tye)
2964
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diff changeset
   392
            end
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diff changeset
   393
      | (TVar (v, S), T) =>
557a11310988 moved classes / sorts to sorts.ML;
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diff changeset
   394
          if occurs v tye T then raise TUNIFY
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
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diff changeset
   395
          else meet (T, S) (Vartab.update_new (v, (S, T)) tye)
2964
557a11310988 moved classes / sorts to sorts.ML;
wenzelm
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diff changeset
   396
      | (T, TVar (v, S)) =>
557a11310988 moved classes / sorts to sorts.ML;
wenzelm
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diff changeset
   397
          if occurs v tye T then raise TUNIFY
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
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diff changeset
   398
          else meet (T, S) (Vartab.update_new (v, (S, T)) tye)
2964
557a11310988 moved classes / sorts to sorts.ML;
wenzelm
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diff changeset
   399
      | (Type (a, Ts), Type (b, Us)) =>
557a11310988 moved classes / sorts to sorts.ML;
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diff changeset
   400
          if a <> b then raise TUNIFY
16885
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diff changeset
   401
          else unifs (Ts, Us) tye
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wenzelm
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diff changeset
   402
      | (T, U) => if T = U then tye else raise TUNIFY)
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wenzelm
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diff changeset
   403
    and unifs (T :: Ts, U :: Us) tye = unifs (Ts, Us) (unif (T, U) tye)
cabcd33cde18 tuned match, unify;
wenzelm
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diff changeset
   404
      | unifs _ tye = tye;
cabcd33cde18 tuned match, unify;
wenzelm
parents: 16650
diff changeset
   405
  in (unif TU tyenv, ! tyvar_count) end;
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clasohm
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   406
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
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diff changeset
   407
(*purely structural unification*)
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   408
fun raw_unify (ty1, ty2) tye =
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   409
  (case (devar tye ty1, devar tye ty2) of
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   410
    (T as TVar (v, S1), U as TVar (w, S2)) =>
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   411
      if eq_ix (v, w) then
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   412
        if S1 = S2 then tye else tvar_clash v S1 S2
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   413
      else Vartab.update_new (w, (S2, T)) tye
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   414
  | (TVar (v, S), T) =>
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   415
      if occurs v tye T then raise TUNIFY
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   416
      else Vartab.update_new (v, (S, T)) tye
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   417
  | (T, TVar (v, S)) =>
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   418
      if occurs v tye T then raise TUNIFY
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   419
      else Vartab.update_new (v, (S, T)) tye
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   420
  | (Type (a, Ts), Type (b, Us)) =>
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   421
      if a <> b then raise TUNIFY
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   422
      else raw_unifys (Ts, Us) tye
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   423
  | (T, U) => if T = U then tye else raise TUNIFY)
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   424
and raw_unifys (T :: Ts, U :: Us) tye = raw_unifys (Ts, Us) (raw_unify (T, U) tye)
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   425
  | raw_unifys _ tye = tye;
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   426
17804
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   427
(*fast unification filter*)
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   428
fun could_unify (Type (a, Ts), Type (b, Us)) = a = b andalso could_unifys (Ts, Us)
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   429
  | could_unify (TFree (a, _), TFree (b, _)) = a = b
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   430
  | could_unify (TVar _, _) = true
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   431
  | could_unify (_, TVar _) = true
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   432
  | could_unify _ = false
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   433
and could_unifys (T :: Ts, U :: Us) = could_unify (T, U) andalso could_unifys (Ts, Us)
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   434
  | could_unifys _ = true;
450
382b5368ec21 added raw_unify;
wenzelm
parents: 422
diff changeset
   435
17804
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   436
4deae4b33d97 added could_unify;
wenzelm
parents: 17756
diff changeset
   437
(*equality with respect to a type environment*)
16650
bd4f7149ba1e Moved eq_type from envir.ML to type.ML
berghofe
parents: 16444
diff changeset
   438
fun eq_type tye (T, T') =
16885
cabcd33cde18 tuned match, unify;
wenzelm
parents: 16650
diff changeset
   439
  (case (devar tye T, devar tye T') of
16650
bd4f7149ba1e Moved eq_type from envir.ML to type.ML
berghofe
parents: 16444
diff changeset
   440
     (Type (s, Ts), Type (s', Ts')) =>
bd4f7149ba1e Moved eq_type from envir.ML to type.ML
berghofe
parents: 16444
diff changeset
   441
       s = s' andalso ListPair.all (eq_type tye) (Ts, Ts')
bd4f7149ba1e Moved eq_type from envir.ML to type.ML
berghofe
parents: 16444
diff changeset
   442
   | (U, U') => U = U');
bd4f7149ba1e Moved eq_type from envir.ML to type.ML
berghofe
parents: 16444
diff changeset
   443
450
382b5368ec21 added raw_unify;
wenzelm
parents: 422
diff changeset
   444
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   445
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   446
(** extend and merge type signatures **)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   447
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   448
(* arities *)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   449
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   450
local
1435
aefcd255ed4a Removed bug in type unification. Negative indexes are not used any longer.
nipkow
parents: 1392
diff changeset
   451
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   452
fun err_decl t decl = error ("Illegal " ^ str_of_decl decl ^ ": " ^ quote t);
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   453
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   454
fun for_classes _ NONE = ""
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   455
  | for_classes pp (SOME (c1, c2)) =
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   456
      " for classes " ^ Pretty.string_of_classrel pp [c1, c2];
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   457
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   458
fun err_conflict pp t cc (c, Ss) (c', Ss') =
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   459
  error ("Conflict of type arities" ^ for_classes pp cc ^ ":\n  " ^
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   460
    Pretty.string_of_arity pp (t, Ss, [c]) ^ " and\n  " ^
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   461
    Pretty.string_of_arity pp (t, Ss', [c']));
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   462
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   463
fun coregular pp C t (c, Ss) ars =
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   464
  let
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   465
    fun conflict (c', Ss') =
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   466
      if Sorts.class_le C (c, c') andalso not (Sorts.sorts_le C (Ss, Ss')) then
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   467
        SOME ((c, c'), (c', Ss'))
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   468
      else if Sorts.class_le C (c', c) andalso not (Sorts.sorts_le C (Ss', Ss)) then
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   469
        SOME ((c', c), (c', Ss'))
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   470
      else NONE;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   471
  in
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   472
    (case Library.get_first conflict ars of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   473
      SOME ((c1, c2), (c', Ss')) => err_conflict pp t (SOME (c1, c2)) (c, Ss) (c', Ss')
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   474
    | NONE => (c, Ss) :: ars)
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   475
  end;
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   476
16340
fd027bb32896 renamed cert_typ_raw to cert_typ_abbrev;
wenzelm
parents: 16289
diff changeset
   477
fun insert pp C t (c, Ss) ars =
17184
3d80209e9a53 use AList operations;
wenzelm
parents: 16946
diff changeset
   478
  (case AList.lookup (op =) ars c of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   479
    NONE => coregular pp C t (c, Ss) ars
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   480
  | SOME Ss' =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   481
      if Sorts.sorts_le C (Ss, Ss') then ars
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   482
      else if Sorts.sorts_le C (Ss', Ss)
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   483
      then coregular pp C t (c, Ss) (ars \ (c, Ss'))
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   484
      else err_conflict pp t NONE (c, Ss) (c, Ss'));
2587
ac51a89627ed added eq_sort (will move to sorts.ML eventually);
wenzelm
parents: 2272
diff changeset
   485
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   486
fun complete C (c, Ss) = map (rpair Ss) (Graph.all_succs C [c]);
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   487
16340
fd027bb32896 renamed cert_typ_raw to cert_typ_abbrev;
wenzelm
parents: 16289
diff changeset
   488
fun insert_arities pp classes (t, ars) arities =
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   489
  let val ars' =
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   490
    Symtab.lookup_multi arities t
16340
fd027bb32896 renamed cert_typ_raw to cert_typ_abbrev;
wenzelm
parents: 16289
diff changeset
   491
    |> fold_rev (fold_rev (insert pp classes t)) (map (complete classes) ars)
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   492
  in Symtab.update (t, ars') arities end;
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   493
16444
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   494
fun insert_table pp classes = Symtab.fold (fn (t, ars) =>
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   495
  insert_arities pp classes (t, map (apsnd (map (Sorts.norm_sort classes))) ars));
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   496
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   497
in
2587
ac51a89627ed added eq_sort (will move to sorts.ML eventually);
wenzelm
parents: 2272
diff changeset
   498
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   499
fun add_arities pp decls tsig = tsig |> map_tsig (fn (classes, default, types, arities) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   500
  let
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   501
    fun prep (t, Ss, S) =
17756
d4a35f82fbb4 minor tweaks for Poplog/ML;
wenzelm
parents: 17496
diff changeset
   502
      (case Symtab.lookup (snd types) t of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   503
        SOME (LogicalType n, _) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   504
          if length Ss = n then
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   505
            (t, map (cert_sort tsig) Ss, cert_sort tsig S)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   506
              handle TYPE (msg, _, _) => error msg
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   507
          else error (bad_nargs t)
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   508
      | SOME (decl, _) => err_decl t decl
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14998
diff changeset
   509
      | NONE => error (undecl_type t));
4603
53b2463ca84c added param;
wenzelm
parents: 4142
diff changeset
   510
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   511
    val ars = decls |> map ((fn (t, Ss, S) => (t, map (fn c => (c, Ss)) S)) o prep);
17756
d4a35f82fbb4 minor tweaks for Poplog/ML;
wenzelm
parents: 17496
diff changeset
   512
    val arities' = fold (insert_arities pp (snd classes)) ars arities;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   513
  in (classes, default, types, arities') end);
12528
b8bc541a4544 tuned interface of unify, param;
wenzelm
parents: 12501
diff changeset
   514
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   515
fun rebuild_arities pp classes arities =
16444
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   516
  Symtab.empty
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   517
  |> insert_table pp classes arities;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   518
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   519
fun merge_arities pp classes (arities1, arities2) =
16444
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   520
  Symtab.empty
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   521
  |> insert_table pp classes arities1
80c8f742c6fc Symtab.fold;
wenzelm
parents: 16370
diff changeset
   522
  |> insert_table pp classes arities2;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   523
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   524
end;
4603
53b2463ca84c added param;
wenzelm
parents: 4142
diff changeset
   525
53b2463ca84c added param;
wenzelm
parents: 4142
diff changeset
   526
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   527
(* classes *)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   528
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   529
local
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   530
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   531
fun err_dup_classes cs =
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   532
  error ("Duplicate declaration of class(es): " ^ commas_quote cs);
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   533
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   534
fun err_cyclic_classes pp css =
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   535
  error (cat_lines (map (fn cs =>
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   536
    "Cycle in class relation: " ^ Pretty.string_of_classrel pp cs) css));
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   537
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   538
fun add_class pp naming (c, cs) tsig =
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   539
  tsig |> map_tsig (fn ((space, classes), default, types, arities) =>
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   540
    let
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   541
      val c' = NameSpace.full naming c;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   542
      val cs' = map (cert_class tsig) cs
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   543
        handle TYPE (msg, _, _) => error msg;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   544
      val space' = space |> NameSpace.declare naming c';
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   545
      val classes' = classes |> Graph.new_node (c', stamp ())
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   546
        handle Graph.DUP dup => err_dup_classes [dup];
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   547
      val classes'' = classes' |> fold Graph.add_edge_trans_acyclic (map (pair c') cs')
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   548
        handle Graph.CYCLES css => err_cyclic_classes pp css;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   549
    in ((space', classes''), default, types, arities) end);
2964
557a11310988 moved classes / sorts to sorts.ML;
wenzelm
parents: 2753
diff changeset
   550
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   551
in
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   552
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   553
val add_classes = fold oo add_class;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   554
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   555
fun add_classrel pp ps tsig =
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   556
  tsig |> map_tsig (fn ((space, classes), default, types, arities) =>
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   557
    let
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   558
      val ps' = map (pairself (cert_class tsig)) ps
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   559
        handle TYPE (msg, _, _) => error msg;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   560
      val classes' = classes |> fold Graph.add_edge_trans_acyclic ps'
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   561
        handle Graph.CYCLES css => err_cyclic_classes pp css;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   562
      val default' = default |> Sorts.norm_sort classes';
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   563
      val arities' = arities |> rebuild_arities pp classes';
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   564
    in ((space, classes'), default', types, arities') end);
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   565
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   566
fun merge_classes pp ((space1, classes1), (space2, classes2)) =
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   567
  let
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   568
    val space = NameSpace.merge (space1, space2);
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   569
    val classes =
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   570
      Graph.merge_trans_acyclic (op =) (classes1, classes2)
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   571
        handle Graph.DUPS cs => err_dup_classes cs
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   572
          | Graph.CYCLES css => err_cyclic_classes pp css;
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   573
  in (space, classes) end;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   574
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   575
end;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   576
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   577
fun hide_classes fully cs = map_tsig (fn ((space, classes), default, types, arities) =>
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   578
  ((fold (NameSpace.hide fully) cs space, classes), default, types, arities));
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   579
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   580
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   581
(* default sort *)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   582
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   583
fun set_defsort S tsig = tsig |> map_tsig (fn (classes, _, types, arities) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   584
  (classes, cert_sort tsig S handle TYPE (msg, _, _) => error msg, types, arities));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   585
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   586
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   587
(* types *)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   588
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   589
local
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   590
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   591
fun err_neg_args c =
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   592
  error ("Negative number of arguments in type constructor declaration: " ^ quote c);
949
83c588d6fee9 Changed treatment of during type inference internally generated type
nipkow
parents: 621
diff changeset
   593
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   594
fun err_in_decls c decl decl' =
14906
2da524f3d785 tuned messages;
wenzelm
parents: 14830
diff changeset
   595
  let val s = str_of_decl decl and s' = str_of_decl decl' in
2da524f3d785 tuned messages;
wenzelm
parents: 14830
diff changeset
   596
    if s = s' then error ("Duplicate declaration of " ^ s ^ ": " ^ quote c)
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   597
    else error ("Conflict of " ^ s ^ " with " ^ s' ^ ": " ^ quote c)
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   598
  end;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   599
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   600
fun new_decl naming (c, decl) (space, types) =
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   601
  let
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   602
    val c' = NameSpace.full naming c;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   603
    val space' = NameSpace.declare naming c' space;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   604
    val types' =
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   605
      (case Symtab.lookup types c' of
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   606
        SOME (decl', _) => err_in_decls c' decl decl'
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   607
      | NONE => Symtab.update (c', (decl, stamp ())) types);
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   608
  in (space', types') end;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   609
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   610
fun the_decl (_, types) = fst o the o Symtab.lookup types;
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   611
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   612
fun change_types f = map_tsig (fn (classes, default, types, arities) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   613
  (classes, default, f types, arities));
2964
557a11310988 moved classes / sorts to sorts.ML;
wenzelm
parents: 2753
diff changeset
   614
14989
5a5d076a9863 tuned certify_typ;
wenzelm
parents: 14906
diff changeset
   615
fun syntactic types (Type (c, Ts)) =
17412
e26cb20ef0cc TableFun/Symtab: curried lookup and update;
wenzelm
parents: 17221
diff changeset
   616
      (case Symtab.lookup types c of SOME (Nonterminal, _) => true | _ => false)
14989
5a5d076a9863 tuned certify_typ;
wenzelm
parents: 14906
diff changeset
   617
        orelse exists (syntactic types) Ts
5a5d076a9863 tuned certify_typ;
wenzelm
parents: 14906
diff changeset
   618
  | syntactic _ _ = false;
5a5d076a9863 tuned certify_typ;
wenzelm
parents: 14906
diff changeset
   619
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   620
fun add_abbrev naming (a, vs, rhs) tsig = tsig |> change_types (fn types =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   621
  let
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   622
    fun err msg =
14906
2da524f3d785 tuned messages;
wenzelm
parents: 14830
diff changeset
   623
      error (msg ^ "\nThe error(s) above occurred in type abbreviation: " ^ quote a);
16946
7f9a7fe413f3 typ_match, unify: canonical argument order;
wenzelm
parents: 16885
diff changeset
   624
    val rhs' = strip_sorts (no_tvars (cert_typ_syntax tsig rhs))
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   625
      handle TYPE (msg, _, _) => err msg;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   626
  in
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   627
    (case duplicates vs of
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   628
      [] => []
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   629
    | dups => err ("Duplicate variables on lhs: " ^ commas_quote dups));
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   630
    (case gen_rems (op =) (map (#1 o #1) (typ_tvars rhs'), vs) of
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   631
      [] => []
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   632
    | extras => err ("Extra variables on rhs: " ^ commas_quote extras));
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   633
    types |> new_decl naming (a, Abbreviation (vs, rhs', syntactic (#2 types) rhs'))
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   634
  end);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   635
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   636
in
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   637
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   638
fun add_types naming ps = change_types (fold (new_decl naming) (ps |> map (fn (c, n) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   639
  if n < 0 then err_neg_args c else (c, LogicalType n))));
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   640
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   641
val add_abbrevs = fold o add_abbrev;
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   642
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   643
fun add_nonterminals naming = change_types o fold (new_decl naming) o map (rpair Nonterminal);
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   644
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   645
fun merge_types (types1, types2) =
17496
26535df536ae slight adaptions to library changes
haftmann
parents: 17412
diff changeset
   646
  NameSpace.merge_tables (Library.eq_snd (op =)) (types1, types2) handle Symtab.DUPS (d :: _) =>
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   647
    err_in_decls d (the_decl types1 d) (the_decl types2 d);
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   648
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   649
end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   650
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   651
fun hide_types fully cs = map_tsig (fn (classes, default, (space, types), arities) =>
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   652
  (classes, default, (fold (NameSpace.hide fully) cs space, types), arities));
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   653
3790
95a47d8bcd69 eliminated raise_term, raise_typ;
wenzelm
parents: 3411
diff changeset
   654
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   655
(* merge type signatures *)
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   656
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   657
fun merge_tsigs pp (tsig1, tsig2) =
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   658
  let
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   659
    val (TSig {classes = classes1, default = default1, types = types1, arities = arities1,
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   660
      log_types = _, witness = _}) = tsig1;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   661
    val (TSig {classes = classes2, default = default2, types = types2, arities = arities2,
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   662
      log_types = _, witness = _}) = tsig2;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   663
14830
faa4865ba1ce removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents: 14790
diff changeset
   664
    val classes' = merge_classes pp (classes1, classes2);
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   665
    val default' = Sorts.inter_sort (#2 classes') (default1, default2);
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   666
    val types' = merge_types (types1, types2);
16370
033d890fe91f name space of classes and types maintained in tsig;
wenzelm
parents: 16340
diff changeset
   667
    val arities' = merge_arities pp (#2 classes') (arities1, arities2);
14790
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   668
  in build_tsig (classes', default', types', arities') end;
0d984ee030a1 major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents: 13666
diff changeset
   669
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   670
end;