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Simplify monomorphisation, and preserve type annotations
This commit is contained in:
Louis Gesbert
parent
22674cd15d
commit
df70c5dd57
@ -212,112 +212,96 @@ let is_some c =
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(assert (EnumConstructor.equal Expr.none_constr c);
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false)
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(* We output a typed expr but the types in the output are wrong, it should be
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untyped and re-typed later. *)
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let rec monomorphize_expr
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(monomorphized_instances : monomorphized_instances)
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(e : typed expr) : typed expr boxed =
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let typ = Expr.ty e in
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match Mark.remove e with
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(e0 : typed expr) : typed expr boxed =
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let ty0 = Expr.ty e0 in
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(* Keys in [monomorphized_instances] are before monomorphization, so collect
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this top-down *)
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let f_expr = monomorphize_expr monomorphized_instances in
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let f_ty = monomorphize_typ monomorphized_instances in
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(* Proceed bottom-up: apply first to the sub-terms *)
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let e = Expr.map ~f:f_expr ~typ:f_ty ~op:Fun.id e0 in
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let m = Mark.get e in
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let map_box f = Expr.Box.app1 e (fun e -> f (Mark.remove e)) m in
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map_box
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@@ function
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| ETuple args ->
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let new_args = List.map (monomorphize_expr monomorphized_instances) args in
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let tuple_instance = Type.Map.find typ monomorphized_instances.tuples in
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let fields =
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StructField.Map.of_list
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@@ List.map2
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(fun new_arg (tuple_field, _) -> tuple_field, new_arg)
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new_args tuple_instance.fields
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let tuple_instance = Type.Map.find ty0 monomorphized_instances.tuples in
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EStruct
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{
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name = tuple_instance.name;
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fields =
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StructField.Map.of_list
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@@ List.map2
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(fun (tuple_field, _) arg -> tuple_field, arg)
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tuple_instance.fields args;
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}
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| ETupleAccess { e; index; _ } ->
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(* The type of the tuple needs to be recovered from the untransformed
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expr *)
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let tup_ty =
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match e0 with ETupleAccess { e; _ }, _ -> Expr.ty e | _ -> assert false
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in
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Expr.estruct ~name:tuple_instance.name ~fields (Mark.get e)
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| ETupleAccess { e = e1; index; _ } ->
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let tuple_instance =
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Type.Map.find (Expr.ty e1) monomorphized_instances.tuples
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in
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let new_e1 = monomorphize_expr monomorphized_instances e1 in
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Expr.estructaccess ~name:tuple_instance.name
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~field:(fst (List.nth tuple_instance.fields index))
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~e:new_e1 (Mark.get e)
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| EMatch { name; e = e1; cases } when EnumName.equal name Expr.option_enum ->
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let new_e1 = monomorphize_expr monomorphized_instances e1 in
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let new_cases =
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EnumConstructor.Map.bindings
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(EnumConstructor.Map.map
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(monomorphize_expr monomorphized_instances)
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cases)
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Type.Map.find tup_ty monomorphized_instances.tuples
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in
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EStructAccess
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{
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name = tuple_instance.name;
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e;
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field = fst (List.nth tuple_instance.fields index);
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}
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| EMatch { name; e; cases } when EnumName.equal name Expr.option_enum ->
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let option_instance = Type.Map.find ty0 monomorphized_instances.options in
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EMatch
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{
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name = option_instance.name;
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e;
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cases =
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EnumConstructor.Map.fold
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(fun c ->
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EnumConstructor.Map.add
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(if is_some c then option_instance.some_cons
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else option_instance.none_cons))
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cases EnumConstructor.Map.empty;
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}
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| EInj { name; e; cons } when EnumName.equal name Expr.option_enum ->
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let option_instance =
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Type.Map.find
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(match Mark.remove (Expr.ty e1) with
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| TOption t -> t
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| _ -> failwith "should not happen")
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(match Mark.remove ty0 with TOption t -> t | _ -> assert false)
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monomorphized_instances.options
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in
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let new_cases =
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match new_cases with
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| [(n1, e1); (n2, e2)] -> (
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match is_some n1, is_some n2 with
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| true, false ->
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[option_instance.some_cons, e1; option_instance.none_cons, e2]
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| false, true ->
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[option_instance.some_cons, e2; option_instance.none_cons, e1]
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| _ -> failwith "should not happen")
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| _ -> failwith "should not happen"
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EInj
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{
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name = option_instance.name;
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e;
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cons =
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(if is_some cons then option_instance.some_cons
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else option_instance.none_cons);
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}
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| EArray elts as e ->
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let elt_ty =
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match Mark.remove ty0 with TArray t -> t | _ -> assert false
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in
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let new_cases = EnumConstructor.Map.of_list new_cases in
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Expr.ematch ~name:option_instance.name ~e:new_e1 ~cases:new_cases
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(Mark.get e)
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| EInj { name; e = e1; cons } when EnumName.equal name Expr.option_enum ->
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let option_instance =
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Type.Map.find
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(match Mark.remove (Expr.ty e) with
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| TOption t -> t
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| _ -> failwith "should not happen")
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monomorphized_instances.options
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in
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let new_e1 = monomorphize_expr monomorphized_instances e1 in
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let new_cons =
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if is_some cons then option_instance.some_cons
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else option_instance.none_cons
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in
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Expr.einj ~name:option_instance.name ~e:new_e1 ~cons:new_cons (Mark.get e)
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(* We do not forget to tweak types stored directly in the AST in the nodes
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of kind [EAbs], [EApp] and [EAppOp]. *)
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| EAbs { binder; tys } ->
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let new_tys = List.map (monomorphize_typ monomorphized_instances) tys in
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let vars, body = Bindlib.unmbind binder in
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let new_body = monomorphize_expr monomorphized_instances body in
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Expr.make_abs vars new_body new_tys (Expr.pos e)
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| EApp { f; args; tys } ->
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let new_f = monomorphize_expr monomorphized_instances f in
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let new_args = List.map (monomorphize_expr monomorphized_instances) args in
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let new_tys = List.map (monomorphize_typ monomorphized_instances) tys in
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Expr.eapp ~f:new_f ~args:new_args ~tys:new_tys (Mark.get e)
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| EAppOp { op; args; tys } ->
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let new_args = List.map (monomorphize_expr monomorphized_instances) args in
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let new_tys = List.map (monomorphize_typ monomorphized_instances) tys in
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Expr.eappop ~op ~args:new_args ~tys:new_tys (Mark.get e)
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| EArray args ->
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let new_args = List.map (monomorphize_expr monomorphized_instances) args in
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let array_instance =
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Type.Map.find
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(match Mark.remove (Expr.ty e) with
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| TArray t -> t
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| _ -> failwith "should not happen")
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monomorphized_instances.arrays
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in
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Expr.estruct ~name:array_instance.name
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~fields:
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(StructField.Map.add array_instance.content_field
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(Expr.earray new_args (Mark.get e))
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(StructField.Map.singleton array_instance.len_field
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(Expr.elit
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(LInt (Runtime.integer_of_int (List.length args)))
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(Mark.get e))))
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(Mark.get e)
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| _ -> Expr.map ~f:(monomorphize_expr monomorphized_instances) e
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let array_instance = Type.Map.find elt_ty monomorphized_instances.arrays in
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EStruct
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{
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name = array_instance.name;
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fields =
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StructField.Map.of_list
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[
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( array_instance.len_field,
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( ELit (LInt (Runtime.integer_of_int (List.length elts))),
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Expr.with_ty m (TLit TInt, Expr.mark_pos m) ) );
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( array_instance.content_field,
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(e, Expr.with_ty m (TArray (f_ty elt_ty), Expr.mark_pos m)) );
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];
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}
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| e -> e
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let program (prg : typed program) :
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untyped program * Scopelang.Dependency.TVertex.t list =
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typed program * Scopelang.Dependency.TVertex.t list =
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let monomorphized_instances = collect_monomorphized_instances prg in
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(* First we remove the polymorphic option type *)
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let prg =
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@ -417,7 +401,6 @@ let program (prg : typed program) :
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scope_body)))
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~varf:Fun.id prg.code_items
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in
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let prg = Program.untype { prg with code_items } in
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( prg,
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( { prg with code_items },
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Scopelang.Dependency.check_type_cycles prg.decl_ctx.ctx_structs
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prg.decl_ctx.ctx_enums )
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@ -18,7 +18,7 @@ open Shared_ast
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open Ast
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val program :
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typed program -> untyped program * Scopelang.Dependency.TVertex.t list
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typed program -> typed program * Scopelang.Dependency.TVertex.t list
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(** This function performs type monomorphization in a Catala program with two
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main actions: {ul
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{- transforms tuples into named structs.}
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@ -474,13 +474,20 @@ end
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module ExprGen (C : EXPR_PARAM) = struct
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let rec expr_aux :
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type a.
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type a t.
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Bindlib.ctxt ->
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Ocolor_types.color4 list ->
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Format.formatter ->
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(a, 't) gexpr ->
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(a, t) gexpr ->
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unit =
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fun bnd_ctx colors fmt e ->
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(* (* Uncomment for type annotations everywhere *)
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* (fun f ->
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* Format.fprintf fmt "@[<hv 1>(%a:@ %a)@]"
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* f e
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* typ_debug
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* (match Mark.get e with Typed {ty; _} -> ty | _ -> TAny,Pos.no_pos))
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* @@ fun fmt e -> *)
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let exprb bnd_ctx colors e = expr_aux bnd_ctx colors e in
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let exprc colors e = exprb bnd_ctx colors e in
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let expr e = exprc colors e in
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