src/Pure/theory.ML
author skalberg
Thu, 09 Oct 2003 18:13:32 +0200
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parent 14204 2fa6ecb87d47
child 14645 83776a9f0a9c
permissions -rw-r--r--
Added support for making constants final, that is, ensuring that no definition can be given later (useful for constants whose behaviour is fixed axiomatically rather than definitionally).
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(*  Title:      Pure/theory.ML
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    ID:         $Id$
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    Author:     Lawrence C Paulson and Markus Wenzel
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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The abstract type "theory" of theories.
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*)
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signature BASIC_THEORY =
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sig
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  type theory
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  exception THEORY of string * theory list
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  val rep_theory: theory ->
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    {sign: Sign.sg,
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      const_deps: unit Graph.T,
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      final_consts: typ list Symtab.table,
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      axioms: term Symtab.table,
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      oracles: ((Sign.sg * Object.T -> term) * stamp) Symtab.table,
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      parents: theory list,
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      ancestors: theory list}
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  val sign_of: theory -> Sign.sg
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  val is_draft: theory -> bool
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  val syn_of: theory -> Syntax.syntax
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  val parents_of: theory -> theory list
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  val ancestors_of: theory -> theory list
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  val subthy: theory * theory -> bool
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  val eq_thy: theory * theory -> bool
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  val cert_axm: Sign.sg -> string * term -> string * term
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  val read_def_axm: Sign.sg * (indexname -> typ option) * (indexname -> sort option) ->
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    string list -> string * string -> string * term
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  val read_axm: Sign.sg -> string * string -> string * term
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  val inferT_axm: Sign.sg -> string * term -> string * term
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end
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signature THEORY =
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sig
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  include BASIC_THEORY
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  val axiomK: string
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  val oracleK: string
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  (*theory extension primitives*)
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  val add_classes: (bclass * xclass list) list -> theory -> theory
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  val add_classes_i: (bclass * class list) list -> theory -> theory
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  val add_classrel: (xclass * xclass) list -> theory -> theory
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  val add_classrel_i: (class * class) list -> theory -> theory
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  val add_defsort: string -> theory -> theory
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  val add_defsort_i: sort -> theory -> theory
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  val add_types: (bstring * int * mixfix) list -> theory -> theory
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  val add_nonterminals: bstring list -> theory -> theory
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  val add_tyabbrs: (bstring * string list * string * mixfix) list
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    -> theory -> theory
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  val add_tyabbrs_i: (bstring * string list * typ * mixfix) list
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    -> theory -> theory
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  val add_arities: (xstring * string list * string) list -> theory -> theory
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  val add_arities_i: (string * sort list * sort) list -> theory -> theory
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  val add_consts: (bstring * string * mixfix) list -> theory -> theory
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  val add_consts_i: (bstring * typ * mixfix) list -> theory -> theory
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  val add_syntax: (bstring * string * mixfix) list -> theory -> theory
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  val add_syntax_i: (bstring * typ * mixfix) list -> theory -> theory
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  val add_modesyntax: string * bool -> (bstring * string * mixfix) list -> theory -> theory
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  val add_modesyntax_i: string * bool -> (bstring * typ * mixfix) list -> theory -> theory
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  val add_trfuns:
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    (string * (Syntax.ast list -> Syntax.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 * (Syntax.ast list -> Syntax.ast)) list -> theory -> theory
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  val add_trfunsT:
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    (string * (bool -> typ -> term list -> term)) list -> theory -> theory
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  val add_tokentrfuns:
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    (string * string * (string -> string * real)) list -> theory -> theory
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  val add_mode_tokentrfuns: string -> (string * (string -> string * real)) list
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    -> theory -> theory
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  val add_trrules: (xstring * string) Syntax.trrule list -> theory -> theory
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  val add_trrules_i: Syntax.ast Syntax.trrule list -> theory -> theory
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  val add_axioms: (bstring * string) list -> theory -> theory
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  val add_axioms_i: (bstring * term) list -> theory -> theory
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  val add_oracle: bstring * (Sign.sg * Object.T -> term) -> theory -> theory
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  val add_finals: bool -> string list -> theory -> theory
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  val add_finals_i: bool -> term list -> theory -> theory
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  val add_defs: bool -> (bstring * string) list -> theory -> theory
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  val add_defs_i: bool -> (bstring * term) list -> theory -> theory
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  val add_path: string -> theory -> theory
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  val parent_path: theory -> theory
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  val root_path: theory -> theory
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  val absolute_path: theory -> theory
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  val hide_space: bool -> string * xstring list -> theory -> theory
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  val hide_space_i: bool -> string * string list -> theory -> theory
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  val hide_classes: bool -> string list -> theory -> theory
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  val hide_types: bool -> string list -> theory -> theory
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  val hide_consts: bool -> string list -> theory -> theory
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  val add_name: string -> theory -> theory
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  val copy: theory -> theory
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  val prep_ext: theory -> theory
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  val prep_ext_merge: theory list -> theory
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  val requires: theory -> string -> string -> unit
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  val assert_super: theory -> theory -> theory
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  val pre_pure: theory
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end;
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signature PRIVATE_THEORY =
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sig
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  include THEORY
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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) * (Sign.sg -> Object.T -> unit)) -> theory -> theory
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  val print_data: Object.kind -> theory -> unit
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  val get_data: Object.kind -> (Object.T -> 'a) -> theory -> 'a
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  val put_data: Object.kind -> ('a -> Object.T) -> 'a -> theory -> theory
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end;
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structure Theory: PRIVATE_THEORY =
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struct
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(** datatype theory **)
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(*Note: dependencies are only tracked for non-overloaded constant definitions*)
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datatype theory =
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  Theory of {
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    sign: Sign.sg,
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    const_deps: unit Graph.T,
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    final_consts: typ list Symtab.table,
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    axioms: term Symtab.table,
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    oracles: ((Sign.sg * Object.T -> term) * stamp) Symtab.table,
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    parents: theory list,
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    ancestors: theory list};
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fun make_theory sign const_deps final_consts axioms oracles parents ancestors =
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  Theory {sign = sign, const_deps = const_deps, final_consts = final_consts, axioms = axioms,
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    oracles = oracles,  parents = parents, ancestors = ancestors};
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fun rep_theory (Theory args) = args;
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val sign_of = #sign o rep_theory;
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val is_draft = Sign.is_draft o sign_of;
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val syn_of = #syn o Sign.rep_sg o sign_of;
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val parents_of = #parents o rep_theory;
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val ancestors_of = #ancestors o rep_theory;
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(*errors involving theories*)
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exception THEORY of string * theory list;
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(*compare theories*)
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val subthy = Sign.subsig o pairself sign_of;
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val eq_thy = Sign.eq_sg o pairself sign_of;
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(*check for some theory*)
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fun requires thy name what =
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  if Sign.exists_stamp name (sign_of thy) then ()
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  else error ("Require theory " ^ quote name ^ " as an ancestor for " ^ what);
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fun assert_super thy1 thy2 =
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  if subthy (thy1, thy2) then thy2
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  else raise THEORY ("Not a super theory", [thy1, thy2]);
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(*partial Pure theory*)
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val pre_pure =
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  make_theory Sign.pre_pure Graph.empty Symtab.empty Symtab.empty Symtab.empty [] [];
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(** extend theory **)
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(*name spaces*)
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val axiomK = "axiom";
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val oracleK = "oracle";
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(* extend logical part of a theory *)
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fun err_dup_axms names =
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  error ("Duplicate axiom name(s): " ^ commas_quote names);
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fun err_dup_oras names =
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  error ("Duplicate oracles: " ^ commas_quote names);
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fun ext_theory thy ext_sg ext_deps new_axms new_oras =
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  let
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    val Theory {sign, const_deps, final_consts, axioms, oracles, parents, ancestors} = thy;
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    val draft = Sign.is_draft sign;
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    val axioms' =
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      Symtab.extend (if draft then axioms else Symtab.empty, new_axms)
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        handle Symtab.DUPS names => err_dup_axms names;
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    val oracles' =
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      Symtab.extend (oracles, new_oras)
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        handle Symtab.DUPS names => err_dup_oras names;
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    val (parents', ancestors') =
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      if draft then (parents, ancestors) else ([thy], thy :: ancestors);
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  in
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    make_theory (ext_sg sign) (ext_deps const_deps) final_consts axioms' oracles' parents' ancestors'
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  end;
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(* extend signature of a theory *)
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fun ext_sign extfun decls thy = ext_theory thy (extfun decls) I [] [];
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val add_classes      = ext_sign Sign.add_classes;
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val add_classes_i    = ext_sign Sign.add_classes_i;
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val add_classrel     = ext_sign Sign.add_classrel;
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val add_classrel_i   = ext_sign Sign.add_classrel_i;
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val add_defsort      = ext_sign Sign.add_defsort;
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val add_defsort_i    = ext_sign Sign.add_defsort_i;
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val add_types        = ext_sign Sign.add_types;
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val add_nonterminals = ext_sign Sign.add_nonterminals;
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val add_tyabbrs      = ext_sign Sign.add_tyabbrs;
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val add_tyabbrs_i    = ext_sign Sign.add_tyabbrs_i;
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val add_arities      = ext_sign Sign.add_arities;
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val add_arities_i    = ext_sign Sign.add_arities_i;
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val add_consts       = ext_sign Sign.add_consts;
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val add_consts_i     = ext_sign Sign.add_consts_i;
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val add_syntax       = ext_sign Sign.add_syntax;
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val add_syntax_i     = ext_sign Sign.add_syntax_i;
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val add_modesyntax   = curry (ext_sign Sign.add_modesyntax);
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val add_modesyntax_i = curry (ext_sign Sign.add_modesyntax_i);
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val add_trfuns       = ext_sign Sign.add_trfuns;
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val add_trfunsT      = ext_sign Sign.add_trfunsT;
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val add_tokentrfuns  = ext_sign Sign.add_tokentrfuns;
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fun add_mode_tokentrfuns m = add_tokentrfuns o map (fn (s, f) => (m, s, f));
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val add_trrules      = ext_sign Sign.add_trrules;
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val add_trrules_i    = ext_sign Sign.add_trrules_i;
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val add_path         = ext_sign Sign.add_path;
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val parent_path      = add_path "..";
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val root_path        = add_path "/";
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val absolute_path    = add_path "//";
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val add_space        = ext_sign Sign.add_space;
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val hide_space       = ext_sign o Sign.hide_space;
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val hide_space_i     = ext_sign o Sign.hide_space_i;
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fun hide_classes b   = curry (hide_space_i b) Sign.classK;
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fun hide_types b     = curry (hide_space_i b) Sign.typeK;
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fun hide_consts b    = curry (hide_space_i b) Sign.constK;
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val add_name         = ext_sign Sign.add_name;
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val copy             = ext_sign (K Sign.copy) ();
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val prep_ext         = ext_sign (K Sign.prep_ext) ();
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(** add axioms **)
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(* prepare axioms *)
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fun err_in_axm name =
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  error ("The error(s) above occurred in axiom " ^ quote name);
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fun no_vars sg tm = (case (term_vars tm, term_tvars tm) of
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    ([], []) => tm
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  | (ts, ixns) => error (Pretty.string_of (Pretty.block (Pretty.breaks
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      (Pretty.str "Illegal schematic variable(s) in term:" ::
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       map (Sign.pretty_term sg) ts @
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       map (Sign.pretty_typ sg o TVar) ixns)))));
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fun cert_axm sg (name, raw_tm) =
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  let
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    val (t, T, _) = Sign.certify_term sg raw_tm
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      handle TYPE (msg, _, _) => error msg
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           | TERM (msg, _) => error msg;
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  in
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    Term.no_dummy_patterns t handle TERM (msg, _) => error msg;
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    assert (T = propT) "Term not of type prop";
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    (name, no_vars sg t)
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  end;
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(*some duplication of code with read_def_cterm*)
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fun read_def_axm (sg, types, sorts) used (name, str) =
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  let
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    val ts = Syntax.read (#syn (Sign.rep_sg sg)) propT str;
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    val (t, _) = Sign.infer_types sg types sorts used true (ts, propT);
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  in cert_axm sg (name, t) end
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  handle ERROR => err_in_axm name;
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fun read_axm sg name_str = read_def_axm (sg, K None, K None) [] name_str;
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fun inferT_axm sg (name, pre_tm) =
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  let
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    val (t, _) = Sign.infer_types sg (K None) (K None) [] true ([pre_tm], propT);
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  in (name, no_vars sg t) end
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  handle ERROR => err_in_axm name;
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(* extend axioms of a theory *)
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fun ext_axms prep_axm raw_axms (thy as Theory {sign, ...}) =
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  let
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    val raw_axms' = map (apfst (Sign.full_name sign)) raw_axms;
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    val axioms =
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      map (apsnd (Term.compress_term o Logic.varify) o prep_axm sign) raw_axms';
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    val ext_sg = Sign.add_space (axiomK, map fst axioms);
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  in ext_theory thy ext_sg I axioms [] end;
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val add_axioms = ext_axms read_axm;
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val add_axioms_i = ext_axms cert_axm;
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(* add oracle **)
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fun add_oracle (raw_name, oracle) (thy as Theory {sign, ...}) =
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  let
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    val name = Sign.full_name sign raw_name;
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    val ext_sg = Sign.add_space (oracleK, [name]);
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  in ext_theory thy ext_sg I [] [(name, (oracle, stamp ()))] end;
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(** add constant definitions **)
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(* clash_types, clash_consts *)
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   308
(*check if types have common instance (ignoring sorts)*)
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   309
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   310
fun clash_types ty1 ty2 =
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   311
  let
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   312
    val ty1' = Type.varifyT ty1;
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   313
    val ty2' = incr_tvar (maxidx_of_typ ty1' + 1) (Type.varifyT ty2);
9320
803cb9c9d4dd const_deps: unit Graph.T;
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   314
  in Type.raw_unify (ty1', ty2') end;
3767
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e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   316
fun clash_consts (c1, ty1) (c2, ty2) =
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   317
  c1 = c2 andalso clash_types ty1 ty2;
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e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   319
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   320
(* clash_defns *)
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   321
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   322
fun clash_defn c_ty (name, tm) =
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2fa6ecb87d47 Fixed soundness bug.
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   323
  let val (c, ty') = dest_Const (head_of (fst (Logic.dest_equals (Logic.strip_imp_concl tm)))) in
3767
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   324
    if clash_consts c_ty (c, ty') then Some (name, ty') else None
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   325
  end handle TERM _ => None;
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diff changeset
   326
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   327
fun clash_defns c_ty axms =
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   328
  distinct (mapfilter (clash_defn c_ty) axms);
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   329
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   330
9320
803cb9c9d4dd const_deps: unit Graph.T;
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   331
(* overloading *)
9280
78a9bca983ac Tightened up check of types in constant defs.
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   332
9320
803cb9c9d4dd const_deps: unit Graph.T;
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   333
datatype overloading = NoOverloading | Useless | Plain;
803cb9c9d4dd const_deps: unit Graph.T;
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   334
803cb9c9d4dd const_deps: unit Graph.T;
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   335
fun overloading sg declT defT =
10403
2955ee2424ce Sign.typ_instance;
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   336
  let val T = Term.incr_tvar (maxidx_of_typ declT + 1) (Type.varifyT defT) in
2955ee2424ce Sign.typ_instance;
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   337
    if Sign.typ_instance sg (declT, T) then NoOverloading
2955ee2424ce Sign.typ_instance;
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diff changeset
   338
    else if Sign.typ_instance sg (Type.rem_sorts declT, Type.rem_sorts T) then Useless
9320
803cb9c9d4dd const_deps: unit Graph.T;
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diff changeset
   339
    else Plain
9280
78a9bca983ac Tightened up check of types in constant defs.
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   340
  end;
78a9bca983ac Tightened up check of types in constant defs.
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   341
78a9bca983ac Tightened up check of types in constant defs.
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3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   343
(* dest_defn *)
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   344
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   345
fun dest_defn tm =
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   346
  let
3787
67571f49ebe3 new internal forms: add_classes_i, add_classrel_i, add_defsort_i, add_arities_i
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   347
    fun err msg = raise TERM (msg, [tm]);
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diff changeset
   348
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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   349
    val (lhs, rhs) = Logic.dest_equals (Logic.strip_imp_concl tm)
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   350
      handle TERM _ => err "Not a meta-equality (==)";
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   351
    val (head, args) = strip_comb lhs;
9320
803cb9c9d4dd const_deps: unit Graph.T;
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   352
    val c_ty as (c, ty) = dest_Const head
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   353
      handle TERM _ => err "Head of lhs not a constant";
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   354
4141
b76a49490833 adapted add_trfunsT;
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   355
    fun dest_free (Free (x, _)) = x
b76a49490833 adapted add_trfunsT;
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   356
      | dest_free (Const ("TYPE", Type ("itself", [TFree (x, _)]))) = x
b76a49490833 adapted add_trfunsT;
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   357
      | dest_free _ = raise Match;
b76a49490833 adapted add_trfunsT;
wenzelm
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diff changeset
   358
b76a49490833 adapted add_trfunsT;
wenzelm
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diff changeset
   359
    val show_frees = commas_quote o map dest_free;
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   360
    val show_tfrees = commas_quote o map fst;
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diff changeset
   361
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   362
    val lhs_dups = duplicates args;
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diff changeset
   363
    val rhs_extras = gen_rems (op =) (term_frees rhs, args);
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diff changeset
   364
    val rhs_extrasT = gen_rems (op =) (term_tfrees rhs, typ_tfrees ty);
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   365
  in
4141
b76a49490833 adapted add_trfunsT;
wenzelm
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diff changeset
   366
    if not (forall (can dest_free) args) then
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   367
      err "Arguments (on lhs) must be variables"
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   368
    else if not (null lhs_dups) then
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   369
      err ("Duplicate variables on lhs: " ^ show_frees lhs_dups)
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parents: 2979
diff changeset
   370
    else if not (null rhs_extras) then
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   371
      err ("Extra variables on rhs: " ^ show_frees rhs_extras)
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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parents: 2979
diff changeset
   372
    else if not (null rhs_extrasT) then
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   373
      err ("Extra type variables on rhs: " ^ show_tfrees rhs_extrasT)
9282
0181ac100520 Defs are now checked for circularity (if not overloaded).
nipkow
parents: 9280
diff changeset
   374
    else if exists_Const (fn c_ty' => c_ty' = c_ty) rhs then
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   375
      err ("Constant to be defined occurs on rhs")
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
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diff changeset
   376
    else (c_ty, rhs)
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   377
  end;
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diff changeset
   378
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   379
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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diff changeset
   380
(* check_defn *)
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diff changeset
   381
3814
b0dc68aa1b6a improved oracles: named, many per theory;
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diff changeset
   382
fun err_in_defn sg name msg =
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   383
  (error_msg msg;
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   384
    error ("The error(s) above occurred in definition " ^ quote (Sign.full_name sg name)));
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   385
9332
ff3a86a00ea5 tuned cycle_msg;
wenzelm
parents: 9320
diff changeset
   386
fun cycle_msg namess = "Cyclic dependency of constants:\n" ^
ff3a86a00ea5 tuned cycle_msg;
wenzelm
parents: 9320
diff changeset
   387
  cat_lines (map (space_implode " -> " o map quote o rev) namess);
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
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parents: 2979
diff changeset
   388
9320
803cb9c9d4dd const_deps: unit Graph.T;
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diff changeset
   389
fun add_deps (c, cs) deps =
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   390
  let fun declare (G, x) = Graph.new_node (x, ()) G handle Graph.DUP _ => G
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   391
  in foldl declare (deps, c :: cs) |> Graph.add_deps_acyclic (c, cs) end;
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   392
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   393
fun check_defn sg overloaded final_consts ((deps, axms), def as (name, tm)) =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   394
  let
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   395
    fun is_final (c, ty) =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   396
      case Symtab.lookup(final_consts,c) of
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   397
        Some [] => true
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   398
      | Some tys => exists (curry (Sign.typ_instance sg) ty) tys
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   399
      | None => false;
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   400
10494
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   401
    fun pretty_const (c, ty) = [Pretty.str c, Pretty.str " ::", Pretty.brk 1,
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   402
      Pretty.quote (Sign.pretty_typ sg (#1 (Type.freeze_thaw_type ty)))];
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   403
10494
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   404
    fun def_txt (c_ty, txt) = Pretty.block
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   405
      (Pretty.str "Definition of " :: pretty_const c_ty @
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   406
        (if txt = "" then [] else [Pretty.str txt]));
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   407
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   408
    fun show_defn c (dfn, ty') = Pretty.block
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   409
      (Pretty.str "  " :: pretty_const (c, ty') @ [Pretty.str " in ", Pretty.str dfn]);
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   410
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   411
    val (c_ty as (c, ty), rhs) = dest_defn tm
9280
78a9bca983ac Tightened up check of types in constant defs.
nipkow
parents: 8897
diff changeset
   412
      handle TERM (msg, _) => err_in_defn sg name msg;
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   413
    val c_decl =
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   414
      (case Sign.const_type sg c of Some T => T
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   415
      | None => err_in_defn sg name ("Undeclared constant " ^ quote c));
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   416
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   417
    val clashed = clash_defns c_ty axms;
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   418
  in
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   419
    if not (null clashed) then
10494
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   420
      err_in_defn sg name (Pretty.string_of (Pretty.chunks
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   421
        (def_txt (c_ty, " clashes with") :: map (show_defn c) clashed)))
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   422
    else if is_final c_ty then
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   423
      err_in_defn sg name (Pretty.string_of (Pretty.block
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   424
        ([Pretty.str "The constant",Pretty.brk 1] @
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   425
	 pretty_const c_ty @
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   426
	 [Pretty.brk 1,Pretty.str "has been declared final"])))
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   427
    else
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   428
      (case overloading sg c_decl ty of
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   429
        NoOverloading =>
13646
46ed3d042ba5 Ported find_intro/elim to Isar.
nipkow
parents: 12785
diff changeset
   430
          (add_deps (c, Term.term_consts rhs) deps
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   431
              handle Graph.CYCLES namess => err_in_defn sg name (cycle_msg namess),
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   432
            def :: axms)
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   433
      | Useless =>
10494
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   434
           err_in_defn sg name (Pretty.string_of (Pretty.chunks
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   435
             [Library.setmp show_sorts true def_txt (c_ty, ""), Pretty.str
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   436
                 "imposes additional sort constraints on the declared type of the constant"]))
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   437
      | Plain =>
10494
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   438
         (if not overloaded then warning (Pretty.string_of (Pretty.chunks
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   439
           [def_txt (c_ty, ""), Pretty.str ("is strictly less general than the declared type (see "
305b37c8d8a3 improved messages;
wenzelm
parents: 10403
diff changeset
   440
               ^ quote (Sign.full_name sg name) ^ ")")]))
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   441
         else (); (deps, def :: axms)))
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   442
  end;
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   443
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   444
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   445
(* add_defs *)
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   446
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   447
fun ext_defns prep_axm overloaded raw_axms thy =
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   448
  let
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   449
    val Theory {sign, const_deps, final_consts, axioms, oracles, parents, ancestors} = thy;
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   450
    val all_axioms = flat (map (Symtab.dest o #axioms o rep_theory) (thy :: ancestors));
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   451
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   452
    val axms = map (prep_axm sign) raw_axms;
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   453
    val (const_deps', _) = foldl (check_defn sign overloaded final_consts) ((const_deps, all_axioms), axms);
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   454
  in
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   455
    make_theory sign const_deps' final_consts axioms oracles parents ancestors
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   456
    |> add_axioms_i axms
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   457
  end;
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   458
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   459
val add_defs_i = ext_defns cert_axm;
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   460
val add_defs = ext_defns read_axm;
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   461
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   462
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   463
(* add_finals *)
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   464
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   465
fun ext_finals prep_term overloaded raw_terms thy =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   466
  let
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   467
    val Theory {sign, const_deps, final_consts, axioms, oracles, parents, ancestors} = thy;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   468
    fun mk_final (finals,tm) =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   469
      let
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   470
        fun err msg = raise TERM(msg,[tm]);
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   471
        val (c,ty) = dest_Const tm
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   472
          handle TERM _ => err "Can only make constants final";
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   473
        val c_decl =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   474
          (case Sign.const_type sign c of Some T => T
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   475
          | None => err ("Undeclared constant " ^ quote c));
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   476
        val simple =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   477
	  case overloading sign c_decl ty of
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   478
	    NoOverloading => true
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   479
	  | Useless => err "Sort restrictions too strong"
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   480
	  | Plain => if overloaded then false
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   481
		     else err "Type is more general than declared";
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   482
        val typ_instance = Sign.typ_instance sign;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   483
      in
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   484
        if simple then
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   485
	  (case Symtab.lookup(finals,c) of
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   486
	    Some [] => err "Constant already final"
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   487
	  | _ => Symtab.update((c,[]),finals))
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   488
	else
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   489
	  (case Symtab.lookup(finals,c) of
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   490
	    Some [] => err "Constant already completely final"
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   491
          | Some tys => if exists (curry typ_instance ty) tys
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   492
			then err "Instance of constant is already final"
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   493
			else Symtab.update((c,ty::gen_rem typ_instance (tys,ty)),finals)
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   494
	  | None => Symtab.update((c,[ty]),finals))
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   495
      end;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   496
    val consts = map (prep_term sign) raw_terms;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   497
    val final_consts' = foldl mk_final (final_consts,consts);
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   498
  in
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   499
    make_theory sign const_deps final_consts' axioms oracles parents ancestors
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   500
  end;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   501
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   502
local
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   503
  fun read_term sg = Sign.simple_read_term sg TypeInfer.logicT;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   504
  val cert_term = #1 oo Sign.certify_term;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   505
in
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   506
val add_finals = ext_finals read_term;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   507
val add_finals_i = ext_finals cert_term;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   508
end;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   509
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   510
fun merge_final sg =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   511
  let
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   512
    fun merge_single (tys,ty) =
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   513
      if exists (curry (Sign.typ_instance sg) ty) tys
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   514
      then tys
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   515
      else (ty::gen_rem (Sign.typ_instance sg) (tys,ty));
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   516
    fun merge ([],_) = []
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   517
      | merge (_,[]) = []
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   518
      | merge input = foldl merge_single input;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   519
  in
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   520
    Some o merge
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   521
  end;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   522
3878
0258594baaa9 remove merge_theories;
wenzelm
parents: 3865
diff changeset
   523
3865
0035d1f97096 added init_data, get_data, put_data;
wenzelm
parents: 3814
diff changeset
   524
(** additional theory data **)
0035d1f97096 added init_data, get_data, put_data;
wenzelm
parents: 3814
diff changeset
   525
4996
951575080635 use Object.T and Object.kind;
wenzelm
parents: 4974
diff changeset
   526
val init_data = curry (ext_sign Sign.init_data);
951575080635 use Object.T and Object.kind;
wenzelm
parents: 4974
diff changeset
   527
fun print_data kind = Sign.print_data kind o sign_of;
951575080635 use Object.T and Object.kind;
wenzelm
parents: 4974
diff changeset
   528
fun get_data kind f = Sign.get_data kind f o sign_of;
951575080635 use Object.T and Object.kind;
wenzelm
parents: 4974
diff changeset
   529
fun put_data kind f = ext_sign (Sign.put_data kind f);
3865
0035d1f97096 added init_data, get_data, put_data;
wenzelm
parents: 3814
diff changeset
   530
0035d1f97096 added init_data, get_data, put_data;
wenzelm
parents: 3814
diff changeset
   531
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   532
6661
24185f54f177 prep_ext exported (again);
wenzelm
parents: 6573
diff changeset
   533
(** merge theories **)          (*exception ERROR*)
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   534
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   535
fun merge_sign (sg, thy) =
4627
ae95666c71cc Sign.merge vs. Sign.nontriv_merge;
wenzelm
parents: 4617
diff changeset
   536
  Sign.nontriv_merge (sg, sign_of thy) handle TERM (msg, _) => error msg;
1526
6be6ea6f8b5d New file of just the theory primitives
paulson
parents:
diff changeset
   537
3878
0258594baaa9 remove merge_theories;
wenzelm
parents: 3865
diff changeset
   538
(*merge list of theories from left to right, preparing extend*)
3967
edd5ff9371f8 sg_ref: automatic adjustment of thms of draft theories;
wenzelm
parents: 3956
diff changeset
   539
fun prep_ext_merge thys =
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   540
  if null thys then
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   541
    error "Merge: no parent theories"
6188
c40e5ac04e3e added is_draft;
wenzelm
parents: 5905
diff changeset
   542
  else if exists is_draft thys then
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   543
    error "Attempt to merge draft theories"
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   544
  else
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   545
    let
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   546
      val sign' =
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   547
        foldl merge_sign (sign_of (hd thys), tl thys)
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   548
        |> Sign.prep_ext
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   549
        |> Sign.add_path "/";
3814
b0dc68aa1b6a improved oracles: named, many per theory;
wenzelm
parents: 3806
diff changeset
   550
9282
0181ac100520 Defs are now checked for circularity (if not overloaded).
nipkow
parents: 9280
diff changeset
   551
      val depss = map (#const_deps o rep_theory) thys;
9320
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   552
      val deps' = foldl (Graph.merge_acyclic (K true)) (hd depss, tl depss)
803cb9c9d4dd const_deps: unit Graph.T;
wenzelm
parents: 9282
diff changeset
   553
        handle Graph.CYCLES namess => error (cycle_msg namess);
9282
0181ac100520 Defs are now checked for circularity (if not overloaded).
nipkow
parents: 9280
diff changeset
   554
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   555
      val final_constss = map (#final_consts o rep_theory) thys;
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   556
      val final_consts' = foldl (Symtab.join (merge_final sign')) (hd final_constss,
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   557
								   tl final_constss);
4488
3e56603fde06 renamed Symtab.null to Symtab.empty;
wenzelm
parents: 4344
diff changeset
   558
      val axioms' = Symtab.empty;
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   559
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   560
      fun eq_ora ((_, (_, s1: stamp)), (_, (_, s2))) = s1 = s2;
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   561
      val oracles' =
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   562
        Symtab.make (gen_distinct eq_ora
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   563
          (flat (map (Symtab.dest o #oracles o rep_theory) thys)))
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   564
        handle Symtab.DUPS names => err_dup_oras names;
4019
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   565
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   566
      val parents' = gen_distinct eq_thy thys;
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   567
      val ancestors' =
f9bfb914805a added ancestors;
wenzelm
parents: 3996
diff changeset
   568
        gen_distinct eq_thy (parents' @ flat (map ancestors_of thys));
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   569
    in
14223
0ee05eef881b Added support for making constants final, that is, ensuring that no
skalberg
parents: 14204
diff changeset
   570
      make_theory sign' deps' final_consts' axioms' oracles' parents' ancestors'
3996
b7548325adc4 tuned names;
wenzelm
parents: 3971
diff changeset
   571
    end;
1526
6be6ea6f8b5d New file of just the theory primitives
paulson
parents:
diff changeset
   572
3885
dccac762b0be added merge_theories (new name arg);
wenzelm
parents: 3878
diff changeset
   573
1526
6be6ea6f8b5d New file of just the theory primitives
paulson
parents:
diff changeset
   574
end;
6be6ea6f8b5d New file of just the theory primitives
paulson
parents:
diff changeset
   575
3767
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   576
structure BasicTheory: BASIC_THEORY = Theory;
e2bb53d8dd26 moved theory stuff (add_defs etc.) here from drule.ML;
wenzelm
parents: 2979
diff changeset
   577
open BasicTheory;