| TAppl l -> 1
;;
+(* None = dropped abstraction *)
+type typ_context = (string * kind) option list
+type term_context = (string * [`OfKind of kind | `OfType of typ]) option list
+
+type typ_former_decl = typ_context * kind
+type typ_former_def = typ_former_decl * typ
+
type term =
| Rel of int
| UnitTerm
| Lambda of string * (* typ **) term
| Appl of term list
| LetIn of string * (* typ **) term * term
- | Match of reference * term * term list
+ | Match of reference * term * (term_context * term) list
| BottomElim
- | TLambda of (* string **) term
+ | TLambda of string * term
| Inst of (*typ_former **) term
| Skip of term
| UnsafeCoerce of term
;;
+type term_former_decl = term_context * typ
+type term_former_def = term_former_decl * term
+
+let mk_appl f x =
+ match f with
+ Appl args -> Appl (args@[x])
+ | _ -> Appl [f;x]
+
let rec size_of_term =
function
| Rel r -> 1
| UnitTerm -> 1
| Const c -> 1
- | Lambda (name, body) -> 1 + size_of_term body
+ | Lambda (_, body) -> 1 + size_of_term body
| Appl l -> List.length l
- | LetIn (name, def, body) -> 1 + size_of_term def + size_of_term body
- | Match (name, case, pats) -> 1 + size_of_term case + List.length pats
+ | LetIn (_, def, body) -> 1 + size_of_term def + size_of_term body
+ | Match (_, case, pats) -> 1 + size_of_term case + List.length pats
| BottomElim -> 1
- | TLambda t -> size_of_term t
+ | TLambda (_,t) -> size_of_term t
| Inst t -> size_of_term t
| Skip t -> size_of_term t
| UnsafeCoerce t -> 1 + size_of_term t
let unitty =
NCic.Const (NReference.reference_of_spec (NUri.uri_of_string "cic:/matita/basics/types/unit.ind") (NReference.Ind (true,0,0)));;
-(* None = dropped abstraction *)
-type typ_context = (string * kind) option list
-type term_context = (string * [`OfKind of kind | `OfType of typ]) option list
-
-type typ_former_decl = typ_context * kind
-type typ_former_def = typ_former_decl * typ
-
-type term_former_decl = term_context * typ
-type term_former_def = term_former_decl * term
-
type obj_kind =
TypeDeclaration of typ_former_decl
| TypeDefinition of typ_former_def
;;
-let context_of_typformer status ~metasenv context =
+let rev_context_of_typformer status ~metasenv context =
function
NCic.Const (NReference.Ref (_,NReference.Ind _) as ref)
| NCic.Const (NReference.Ref (_,NReference.Def _) as ref)
| NCic.Const (NReference.Ref (_,NReference.Decl) as ref)
| NCic.Const (NReference.Ref (_,NReference.Fix _) as ref) ->
- (try fst (ReferenceMap.find ref status#extraction_db)
+ (try List.rev (fst (ReferenceMap.find ref status#extraction_db))
with
- Not_found -> assert false (* IMPOSSIBLE *))
+ Not_found ->
+ (* This can happen only when we are processing the type of
+ the constructor of a small singleton type. In this case
+ we are not interested in all the type, but only in its
+ backbone. That is why we can safely return the dummy context here *)
+ let rec dummy = None::dummy in
+ dummy)
| NCic.Match _ -> assert false (* TODO ???? *)
| NCic.Rel n ->
let typ =
| _,NCic.Def _ -> assert false (* IMPOSSIBLE *) in
let typ_ctx = snd (HExtlib.split_nth n context) in
let typ = kind_of status ~metasenv typ_ctx typ in
- fst (split_kind_prods [] typ)
+ List.rev (fst (split_kind_prods [] typ))
| NCic.Meta _ -> assert false (* TODO *)
| NCic.Const (NReference.Ref (_,NReference.Con _))
| NCic.Const (NReference.Ref (_,NReference.CoFix _))
| NCic.Rel n -> Var n
| NCic.Const ref -> TConst ref
| NCic.Appl (he::args) ->
- let he_context = context_of_typformer status ~metasenv context he in
+ let rev_he_context= rev_context_of_typformer status ~metasenv context he in
TAppl (typ_of status ~metasenv context he ::
List.map
(function None -> Unit | Some ty -> typ_of status ~metasenv context ty)
- (skip_args status ~metasenv context (List.rev he_context,args)))
+ (skip_args status ~metasenv context (rev_he_context,args)))
| NCic.Appl _ -> assert false (* TODO: when head is a match/let rec;
otherwise NOT A TYPE *)
| NCic.Meta _
(* CSC: non-invariant assumed here about "_" *)
(match classify status ~metasenv context ty with
| `Kind ->
- TLambda (term_of status ~metasenv ((b,NCic.Decl ty)::context) bo)
+ TLambda (b,term_of status ~metasenv ((b,NCic.Decl ty)::context) bo)
| `KindOrType (* ??? *)
| `Type ->
Lambda (b, term_of status ~metasenv ((b,NCic.Decl ty)::context) bo)
| NCic.Appl (he::args) ->
eat_args status metasenv
(term_of status ~metasenv context he) context
+ (*BUG: recomputing every time the type of the head*)
(typ_of status ~metasenv context
(NCicTypeChecker.typeof status ~metasenv ~subst:[] context he))
args
-(*
- let he_context = context_of_typformer status ~metasenv context he in
- let process_args he =
- function
- `Empty -> he
- | `Inst tl -> Inst (process_args he tl)
- | `Appl (arg,tl) -> process_args (Appl (he,... arg)) tl
- in
- Appl (typ_of status ~metasenv context he ::
- process_args (typ_of status ~metasenv context he)
- (skip_term_args status ~metasenv context (List.rev he_context,args))
-*)
| NCic.Appl _ -> assert false (* TODO: when head is a match/let rec;
otherwise NOT A TYPE *)
| NCic.Meta _ -> assert false (* TODO *)
| NCic.Match (ref,_,t,pl) ->
+ let patterns_of pl =
+ let constructors, leftno =
+ let _,leftno,tys,_,n = NCicEnvironment.get_checked_indtys status ref in
+ let _,_,_,cl = List.nth tys n in
+ cl,leftno
+ in
+ let rec eat_branch n ty context ctx pat =
+ match (ty, pat) with
+ | TSkip t,_
+ | Forall (_,_,t),_
+ | Arrow (_, t), _ when n > 0 ->
+ eat_branch (pred n) t context ctx pat
+ | _, _ when n > 0 -> assert false (*BUG: is Top possible here?*)
+ (*CSC: unify the three cases below? *)
+ | Arrow (_, t), NCic.Lambda (name, ty, t') ->
+ let ctx =
+ (Some (name,`OfType (typ_of status ~metasenv context ty)))::ctx in
+ let context = (name,NCic.Decl ty)::context in
+ eat_branch 0 t context ctx t'
+ | Forall (_,_,t),NCic.Lambda (name, ty, t') ->
+ let ctx =
+ (Some (name,`OfKind (kind_of status ~metasenv context ty)))::ctx in
+ let context = (name,NCic.Decl ty)::context in
+ eat_branch 0 t context ctx t'
+ | TSkip t,NCic.Lambda (name, ty, t') ->
+ let ctx = None::ctx in
+ let context = (name,NCic.Decl ty)::context in
+ eat_branch 0 t context ctx t'
+ | Top,_ -> assert false (*TODO: HOW??*)
+ (*BUG here, eta-expand!*)
+ | _, _ -> context,ctx, pat
+ in
+ try
+ List.map2
+ (fun (_, name, ty) pat ->
+ (*BUG: recomputing every time the type of the constructor*)
+ let ty = typ_of status ~metasenv context ty in
+ let context,lhs,rhs = eat_branch leftno ty context [] pat in
+ let rhs =
+ (* UnsafeCoerce not always required *)
+ UnsafeCoerce (term_of status ~metasenv context rhs)
+ in
+ lhs,rhs
+ ) constructors pl
+ with Invalid_argument _ -> assert false
+ in
(match classify_not_term status [] (NCic.Const ref) with
| `PropKind
| `KindOrType
| `Kind -> assert false (* IMPOSSIBLE *)
| `Proposition ->
- (match pl with
+ (match patterns_of pl with
[] -> BottomElim
- | [p] ->
- (* UnsafeCoerce not always required *)
- UnsafeCoerce
- (term_of status ~metasenv context p (* Lambdas will be skipped *))
+ | [_lhs,rhs] -> rhs (*BUG HERE: Rels are not ok, bound in the _lhs*)
| _ -> assert false)
| `Type ->
- Match (ref,term_of status ~metasenv context t,
- (* UnsafeCoerce not always required *)
- List.map (fun p -> UnsafeCoerce (term_of status ~metasenv context p)) pl))
+ Match (ref,term_of status ~metasenv context t, patterns_of pl))
and eat_args status metasenv acc context tyhe =
function
[] -> acc
| arg::tl ->
- let mk_appl f x =
- match f with
- Appl args -> Appl (args@[x])
- | _ -> Appl [f;x]
- in
match fomega_whd status tyhe with
Arrow (s,t) ->
let arg =
"forall " ^ name ^ ". " ^ pretty_print_type status (name::ctxt) t
| TAppl tl -> String.concat " " (List.map (pretty_print_type status ctxt) tl)
+let pretty_print_term_context status ctx1 ctx2 =
+ let name_context, rev_res =
+ List.fold_right
+ (fun el (ctx1,rev_res) ->
+ match el with
+ None -> ""@::ctx1,rev_res
+ | Some (name,`OfKind _) -> name@::ctx1,rev_res
+ | Some (name,`OfType typ) ->
+ let name,ctx1 = name@:::ctx1 in
+ name::ctx1,
+ ("(" ^ name ^ " :: " ^ pretty_print_type status ctx1 typ ^ ")")::rev_res
+ ) ctx2 (ctx1,[]) in
+ name_context, String.concat " " (List.rev rev_res)
+
let rec pretty_print_term status ctxt =
function
| Rel n -> List.nth ctxt (n-1)
if pl = [] then
"error \"Case analysis over empty type\""
else
- let constructors, leftno =
- let _,leftno,tys,_,n = NCicEnvironment.get_checked_indtys status r in
- let _,_,_,cl = List.nth tys n in
- cl,leftno
- in
- let rec eat_branch n ty pat =
- match (ty, pat) with
- | NCic.Prod (_, _, t), _ when n > 0 -> eat_branch (pred n) t pat
- | NCic.Prod (_, _, t), Lambda (name, t') ->
- (*CSC: BUG HERE; WHAT IF SOME ARGUMENTS ARE DELETED?*)
- let cv, rhs = eat_branch 0 t t' in
- name :: cv, rhs
- | _, _ -> [], pat
- in
- let j = ref 0 in
- let patterns =
- try
- List.map2
- (fun (_, name, ty) pat -> incr j; name, eat_branch leftno ty pat) constructors pl
- with Invalid_argument _ -> assert false
- in
- "case " ^ pretty_print_term status ctxt matched ^ " of\n" ^
- String.concat "\n"
- (List.map
- (fun (name,(bound_names,rhs)) ->
- let pattern,body =
- (*CSC: BUG avoid name clashes *)
- String.concat " " (String.capitalize name::bound_names),
- pretty_print_term status ((List.rev bound_names)@ctxt) rhs
- in
- " " ^ pattern ^ " -> " ^ body
- ) patterns)
- | Skip t
- | TLambda t -> pretty_print_term status (""@::ctxt) t
+ "case " ^ pretty_print_term status ctxt matched ^ " of\n" ^
+ String.concat "\n"
+ (HExtlib.list_mapi
+ (fun (bound_names,rhs) i ->
+ let ref = NReference.mk_constructor (i+1) r in
+ let name = pp_ref status ref in
+ let ctxt,bound_names =
+ pretty_print_term_context status ctxt bound_names in
+ let body =
+ pretty_print_term status ctxt rhs
+ in
+ " " ^ name ^ " " ^ bound_names ^ " -> " ^ body
+ ) pl)
+ | Skip t -> pretty_print_term status ("[[skipped]]"@::ctxt) t
+ | TLambda (name,t) ->
+ let name = capitalize `TypeVariable name in
+ pretty_print_term status (name@::ctxt) t
| Inst t -> pretty_print_term status ctxt t
;;
-(*
-type term_context = (string * [`OfKind of kind | `OfType of typ]) option list
-
-type term_former_def = term_context * term * typ
-type term_former_decl = term_context * typ
-*)
-
let rec pp_obj status (ref,obj_kind) =
let pretty_print_context ctx =
String.concat " " (List.rev (snd
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