renamed structure PureThy to Pure_Thy and moved most content to Global_Theory, to emphasize that this is global-only;
(* Title: HOLCF/Tools/Domain/domain_extender.ML
Author: David von Oheimb
Author: Brian Huffman
Theory extender for domain command, including theory syntax.
*)
signature DOMAIN_EXTENDER =
sig
val add_domain_cmd:
binding ->
((string * string option) list * binding * mixfix *
(binding * (bool * binding option * string) list * mixfix) list) list
-> theory -> theory
val add_domain:
binding ->
((string * string option) list * binding * mixfix *
(binding * (bool * binding option * typ) list * mixfix) list) list
-> theory -> theory
val add_new_domain_cmd:
binding ->
((string * string option) list * binding * mixfix *
(binding * (bool * binding option * string) list * mixfix) list) list
-> theory -> theory
val add_new_domain:
binding ->
((string * string option) list * binding * mixfix *
(binding * (bool * binding option * typ) list * mixfix) list) list
-> theory -> theory
end;
structure Domain_Extender :> DOMAIN_EXTENDER =
struct
open Domain_Library;
(* ----- general testing and preprocessing of constructor list -------------- *)
fun check_and_sort_domain
(dtnvs : (string * typ list) list)
(cons'' : (binding * (bool * binding option * typ) list * mixfix) list list)
(thy : theory)
: ((string * typ list) *
(binding * (bool * binding option * typ) list * mixfix) list) list =
let
val defaultS = Sign.defaultS thy;
val test_dupl_typs =
case duplicates (op =) (map fst dtnvs) of
[] => false | dups => error ("Duplicate types: " ^ commas_quote dups);
val all_cons = map (Binding.name_of o first) (flat cons'');
val test_dupl_cons =
case duplicates (op =) all_cons of
[] => false | dups => error ("Duplicate constructors: "
^ commas_quote dups);
val all_sels =
(map Binding.name_of o map_filter second o maps second) (flat cons'');
val test_dupl_sels =
case duplicates (op =) all_sels of
[] => false | dups => error("Duplicate selectors: "^commas_quote dups);
fun test_dupl_tvars s =
case duplicates (op =) (map(fst o dest_TFree)s) of
[] => false | dups => error("Duplicate type arguments: "
^commas_quote dups);
val test_dupl_tvars' = exists test_dupl_tvars (map snd dtnvs);
(* test for free type variables, illegal sort constraints on rhs,
non-pcpo-types and invalid use of recursive type;
replace sorts in type variables on rhs *)
fun analyse_equation ((dname,typevars),cons') =
let
val tvars = map dest_TFree typevars;
val distinct_typevars = map TFree tvars;
fun rm_sorts (TFree(s,_)) = TFree(s,[])
| rm_sorts (Type(s,ts)) = Type(s,remove_sorts ts)
| rm_sorts (TVar(s,_)) = TVar(s,[])
and remove_sorts l = map rm_sorts l;
fun analyse indirect (TFree(v,s)) =
(case AList.lookup (op =) tvars v of
NONE => error ("Free type variable " ^ quote v ^ " on rhs.")
| SOME sort => if eq_set (op =) (s, defaultS) orelse
eq_set (op =) (s, sort)
then TFree(v,sort)
else error ("Inconsistent sort constraint" ^
" for type variable " ^ quote v))
| analyse indirect (t as Type(s,typl)) =
(case AList.lookup (op =) dtnvs s of
NONE => Type (s, map (analyse false) typl)
| SOME typevars =>
if indirect
then error ("Indirect recursion of type " ^
quote (string_of_typ thy t))
else if dname <> s orelse
(** BUG OR FEATURE?:
mutual recursion may use different arguments **)
remove_sorts typevars = remove_sorts typl
then Type(s,map (analyse true) typl)
else error ("Direct recursion of type " ^
quote (string_of_typ thy t) ^
" with different arguments"))
| analyse indirect (TVar _) = Imposs "extender:analyse";
fun check_pcpo lazy T =
let val ok = if lazy then cpo_type else pcpo_type
in if ok thy T then T
else error ("Constructor argument type is not of sort pcpo: " ^
string_of_typ thy T)
end;
fun analyse_arg (lazy, sel, T) =
(lazy, sel, check_pcpo lazy (analyse false T));
fun analyse_con (b, args, mx) = (b, map analyse_arg args, mx);
in ((dname,distinct_typevars), map analyse_con cons') end;
in ListPair.map analyse_equation (dtnvs,cons'')
end; (* let *)
(* ----- calls for building new thy and thms -------------------------------- *)
type info =
Domain_Take_Proofs.iso_info list * Domain_Take_Proofs.take_induct_info;
fun gen_add_domain
(prep_typ : theory -> 'a -> typ)
(add_isos : (binding * mixfix * (typ * typ)) list -> theory -> info * theory)
(comp_dbind : binding)
(eqs''' : ((string * string option) list * binding * mixfix *
(binding * (bool * binding option * 'a) list * mixfix) list) list)
(thy : theory) =
let
val dtnvs : (binding * typ list * mixfix) list =
let
fun readS (SOME s) = Syntax.read_sort_global thy s
| readS NONE = Sign.defaultS thy;
fun readTFree (a, s) = TFree (a, readS s);
in
map (fn (vs,dname:binding,mx,_) =>
(dname, map readTFree vs, mx)) eqs'''
end;
fun thy_type (dname,tvars,mx) = (dname, length tvars, mx);
fun thy_arity (dname,tvars,mx) =
(Sign.full_name thy dname, map (snd o dest_TFree) tvars, @{sort rep});
(* this theory is used just for parsing and error checking *)
val tmp_thy = thy
|> Theory.copy
|> Sign.add_types (map thy_type dtnvs)
|> fold (AxClass.axiomatize_arity o thy_arity) dtnvs;
val dbinds : binding list =
map (fn (_,dbind,_,_) => dbind) eqs''';
val cons''' :
(binding * (bool * binding option * 'a) list * mixfix) list list =
map (fn (_,_,_,cons) => cons) eqs''';
val cons'' :
(binding * (bool * binding option * typ) list * mixfix) list list =
map (map (upd_second (map (upd_third (prep_typ tmp_thy))))) cons''';
val dtnvs' : (string * typ list) list =
map (fn (dname,vs,mx) => (Sign.full_name thy dname,vs)) dtnvs;
val eqs' : ((string * typ list) *
(binding * (bool * binding option * typ) list * mixfix) list) list =
check_and_sort_domain dtnvs' cons'' tmp_thy;
val dts : typ list = map (Type o fst) eqs';
fun mk_arg_typ (lazy, dest_opt, T) = if lazy then mk_uT T else T;
fun mk_con_typ (bind, args, mx) =
if null args then oneT else foldr1 mk_sprodT (map mk_arg_typ args);
fun mk_eq_typ (_, cons) = foldr1 mk_ssumT (map mk_con_typ cons);
val repTs : typ list = map mk_eq_typ eqs';
val iso_spec : (binding * mixfix * (typ * typ)) list =
map (fn ((dbind, _, mx), eq) => (dbind, mx, eq))
(dtnvs ~~ (dts ~~ repTs));
val ((iso_infos, take_info), thy) = add_isos iso_spec thy;
val new_dts : (string * string list) list =
map (fn ((s,Ts),_) => (s, map (fst o dest_TFree) Ts)) eqs';
fun one_con (con,args,mx) : cons =
(Binding.name_of con, (* FIXME preverse binding (!?) *)
ListPair.map (fn ((lazy,sel,tp),vn) =>
mk_arg ((lazy, Datatype_Aux.dtyp_of_typ new_dts tp), vn))
(args, Datatype_Prop.make_tnames (map third args)));
val eqs : eq list =
map (fn (dtnvs,cons') => (dtnvs, map one_con cons')) eqs';
val ((rewss, take_rews), theorems_thy) =
thy
|> fold_map (fn (((dbind, eq), (_,cs)), info) =>
Domain_Theorems.theorems (eq, eqs) dbind cs info take_info)
(dbinds ~~ eqs ~~ eqs' ~~ iso_infos)
||>> Domain_Theorems.comp_theorems (comp_dbind, eqs) take_info;
in
theorems_thy
|> Global_Theory.add_thmss
[((Binding.qualified true "rews" comp_dbind,
flat rewss @ take_rews), [])]
|> snd
end;
fun define_isos (spec : (binding * mixfix * (typ * typ)) list) =
let
fun prep (dbind, mx, (lhsT, rhsT)) =
let val (dname, vs) = dest_Type lhsT;
in (map (fst o dest_TFree) vs, dbind, mx, rhsT, NONE) end;
in
Domain_Isomorphism.domain_isomorphism (map prep spec)
end;
val add_domain =
gen_add_domain Sign.certify_typ Domain_Axioms.add_axioms;
val add_new_domain =
gen_add_domain Sign.certify_typ define_isos;
val add_domain_cmd =
gen_add_domain Syntax.read_typ_global Domain_Axioms.add_axioms;
val add_new_domain_cmd =
gen_add_domain Syntax.read_typ_global define_isos;
(** outer syntax **)
val _ = Keyword.keyword "lazy";
val dest_decl : (bool * binding option * string) parser =
Parse.$$$ "(" |-- Scan.optional (Parse.$$$ "lazy" >> K true) false --
(Parse.binding >> SOME) -- (Parse.$$$ "::" |-- Parse.typ) --| Parse.$$$ ")" >> Parse.triple1
|| Parse.$$$ "(" |-- Parse.$$$ "lazy" |-- Parse.typ --| Parse.$$$ ")"
>> (fn t => (true,NONE,t))
|| Parse.typ >> (fn t => (false,NONE,t));
val cons_decl =
Parse.binding -- Scan.repeat dest_decl -- Parse.opt_mixfix;
val domain_decl =
(Parse.type_args_constrained -- Parse.binding -- Parse.opt_mixfix) --
(Parse.$$$ "=" |-- Parse.enum1 "|" cons_decl);
val domains_decl =
Scan.option (Parse.$$$ "(" |-- Parse.binding --| Parse.$$$ ")") --
Parse.and_list1 domain_decl;
fun mk_domain
(definitional : bool)
(opt_name : binding option,
doms : ((((string * string option) list * binding) * mixfix) *
((binding * (bool * binding option * string) list) * mixfix) list) list ) =
let
val names = map (fn (((_, t), _), _) => Binding.name_of t) doms;
val specs : ((string * string option) list * binding * mixfix *
(binding * (bool * binding option * string) list * mixfix) list) list =
map (fn (((vs, t), mx), cons) =>
(vs, t, mx, map (fn ((c, ds), mx) => (c, ds, mx)) cons)) doms;
val comp_dbind =
case opt_name of NONE => Binding.name (space_implode "_" names)
| SOME s => s;
in
if definitional
then add_new_domain_cmd comp_dbind specs
else add_domain_cmd comp_dbind specs
end;
val _ =
Outer_Syntax.command "domain" "define recursive domains (HOLCF)"
Keyword.thy_decl (domains_decl >> (Toplevel.theory o mk_domain false));
val _ =
Outer_Syntax.command "new_domain" "define recursive domains (HOLCF)"
Keyword.thy_decl (domains_decl >> (Toplevel.theory o mk_domain true));
end;