1877 lines
68 KiB
OCaml
1877 lines
68 KiB
OCaml
(**************************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy and Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. *)
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(* *)
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(* All rights reserved. This file is distributed under the terms of *)
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(* the GNU Lesser General Public License version 2.1, with the *)
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(* special exception on linking described in the file LICENSE. *)
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(* *)
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(**************************************************************************)
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(**** Typing of type definitions ****)
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open Misc
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open Asttypes
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open Parsetree
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open Primitive
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open Types
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open Typetexp
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module String = Misc.Stdlib.String
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type native_repr_kind = Unboxed | Untagged
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type error =
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Repeated_parameter
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| Duplicate_constructor of string
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| Too_many_constructors
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| Duplicate_label of string
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| Recursive_abbrev of string
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| Cycle_in_def of string * type_expr
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| Definition_mismatch of type_expr * Includecore.type_mismatch option
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| Constraint_failed of type_expr * type_expr
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| Inconsistent_constraint of Env.t * Ctype.Unification_trace.t
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| Type_clash of Env.t * Ctype.Unification_trace.t
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| Non_regular of {
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definition: Path.t;
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used_as: type_expr;
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defined_as: type_expr;
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expansions: (type_expr * type_expr) list;
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}
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| Null_arity_external
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| Missing_native_external
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| Unbound_type_var of type_expr * type_declaration
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| Cannot_extend_private_type of Path.t
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| Not_extensible_type of Path.t
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| Extension_mismatch of Path.t * Includecore.type_mismatch
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| Rebind_wrong_type of Longident.t * Env.t * Ctype.Unification_trace.t
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| Rebind_mismatch of Longident.t * Path.t * Path.t
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| Rebind_private of Longident.t
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| Variance of Typedecl_variance.error
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| Unavailable_type_constructor of Path.t
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| Bad_fixed_type of string
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| Unbound_type_var_ext of type_expr * extension_constructor
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| Val_in_structure
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| Multiple_native_repr_attributes
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| Cannot_unbox_or_untag_type of native_repr_kind
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| Deep_unbox_or_untag_attribute of native_repr_kind
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| Immediacy of Typedecl_immediacy.error
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| Separability of Typedecl_separability.error
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| Bad_unboxed_attribute of string
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| Boxed_and_unboxed
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| Nonrec_gadt
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open Typedtree
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exception Error of Location.t * error
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(* Note: do not factor the branches in the following pattern-matching:
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the records must be constants for the compiler to do sharing on them.
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*)
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let get_unboxed_from_attributes sdecl =
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let unboxed = Builtin_attributes.has_unboxed sdecl.ptype_attributes in
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let boxed = Builtin_attributes.has_boxed sdecl.ptype_attributes in
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match boxed, unboxed, !Clflags.unboxed_types with
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| true, true, _ -> raise (Error(sdecl.ptype_loc, Boxed_and_unboxed))
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| true, false, _ -> unboxed_false_default_false
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| false, true, _ -> unboxed_true_default_false
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| false, false, false -> unboxed_false_default_true
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| false, false, true -> unboxed_true_default_true
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(* Enter all declared types in the environment as abstract types *)
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let add_type ~check id decl env =
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Builtin_attributes.warning_scope ~ppwarning:false decl.type_attributes
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(fun () -> Env.add_type ~check id decl env)
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let enter_type rec_flag env sdecl (id, uid) =
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let needed =
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match rec_flag with
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| Asttypes.Nonrecursive ->
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begin match sdecl.ptype_kind with
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| Ptype_variant scds ->
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List.iter (fun cd ->
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if cd.pcd_res <> None then raise (Error(cd.pcd_loc, Nonrec_gadt)))
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scds
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| _ -> ()
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end;
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Btype.is_row_name (Ident.name id)
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| Asttypes.Recursive -> true
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in
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let arity = List.length sdecl.ptype_params in
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if not needed then env else
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let decl =
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{ type_params =
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List.map (fun _ -> Btype.newgenvar ()) sdecl.ptype_params;
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type_arity = arity;
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type_kind = Type_abstract;
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type_private = sdecl.ptype_private;
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type_manifest =
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begin match sdecl.ptype_manifest with None -> None
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| Some _ -> Some(Ctype.newvar ()) end;
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type_variance = Variance.unknown_signature ~injective:false ~arity;
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type_separability = Types.Separability.default_signature ~arity;
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type_is_newtype = false;
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type_expansion_scope = Btype.lowest_level;
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type_loc = sdecl.ptype_loc;
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type_attributes = sdecl.ptype_attributes;
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type_immediate = Unknown;
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type_unboxed = unboxed_false_default_false;
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type_uid = uid;
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}
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in
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add_type ~check:true id decl env
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let update_type temp_env env id loc =
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let path = Path.Pident id in
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let decl = Env.find_type path temp_env in
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match decl.type_manifest with None -> ()
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| Some ty ->
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let params = List.map (fun _ -> Ctype.newvar ()) decl.type_params in
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try Ctype.unify env (Ctype.newconstr path params) ty
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with Ctype.Unify trace ->
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raise (Error(loc, Type_clash (env, trace)))
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let get_unboxed_type_representation env ty =
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match Typedecl_unboxed.get_unboxed_type_representation env ty with
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| Typedecl_unboxed.This x -> Some x
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| _ -> None
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(* Determine if a type's values are represented by floats at run-time. *)
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let is_float env ty =
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match get_unboxed_type_representation env ty with
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Some {desc = Tconstr(p, _, _); _} -> Path.same p Predef.path_float
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| _ -> false
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(* Determine if a type definition defines a fixed type. (PW) *)
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let is_fixed_type sd =
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let rec has_row_var sty =
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match sty.ptyp_desc with
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Ptyp_alias (sty, _) -> has_row_var sty
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| Ptyp_class _
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| Ptyp_object (_, Open)
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| Ptyp_variant (_, Open, _)
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| Ptyp_variant (_, Closed, Some _) -> true
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| _ -> false
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in
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match sd.ptype_manifest with
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None -> false
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| Some sty ->
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sd.ptype_kind = Ptype_abstract &&
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sd.ptype_private = Private &&
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has_row_var sty
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(* Set the row variable in a fixed type *)
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let set_fixed_row env loc p decl =
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let tm =
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match decl.type_manifest with
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None -> assert false
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| Some t -> Ctype.expand_head env t
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in
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let rv =
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match tm.desc with
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Tvariant row ->
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let row = Btype.row_repr row in
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tm.desc <- Tvariant {row with row_fixed = Some Fixed_private};
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if Btype.static_row row then Btype.newgenty Tnil
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else row.row_more
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| Tobject (ty, _) ->
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snd (Ctype.flatten_fields ty)
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| _ ->
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raise (Error (loc, Bad_fixed_type "is not an object or variant"))
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in
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if not (Btype.is_Tvar rv) then
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raise (Error (loc, Bad_fixed_type "has no row variable"));
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rv.desc <- Tconstr (p, decl.type_params, ref Mnil)
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(* Translate one type declaration *)
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let make_params env params =
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let make_param (sty, v) =
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try
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(transl_type_param env sty, v)
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with Already_bound ->
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raise(Error(sty.ptyp_loc, Repeated_parameter))
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in
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List.map make_param params
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let transl_labels env closed lbls =
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assert (lbls <> []);
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let all_labels = ref String.Set.empty in
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List.iter
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(fun {pld_name = {txt=name; loc}} ->
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if String.Set.mem name !all_labels then
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raise(Error(loc, Duplicate_label name));
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all_labels := String.Set.add name !all_labels)
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lbls;
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let mk {pld_name=name;pld_mutable=mut;pld_type=arg;pld_loc=loc;
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pld_attributes=attrs} =
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Builtin_attributes.warning_scope attrs
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(fun () ->
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let arg = Ast_helper.Typ.force_poly arg in
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let cty = transl_simple_type env closed arg in
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{ld_id = Ident.create_local name.txt;
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ld_name = name; ld_mutable = mut;
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ld_type = cty; ld_loc = loc; ld_attributes = attrs}
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)
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in
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let lbls = List.map mk lbls in
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let lbls' =
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List.map
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(fun ld ->
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let ty = ld.ld_type.ctyp_type in
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let ty = match ty.desc with Tpoly(t,[]) -> t | _ -> ty in
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{Types.ld_id = ld.ld_id;
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ld_mutable = ld.ld_mutable;
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ld_type = ty;
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ld_loc = ld.ld_loc;
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ld_attributes = ld.ld_attributes;
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ld_uid = Uid.mk ~current_unit:(Env.get_unit_name ());
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}
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)
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lbls in
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lbls, lbls'
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let transl_constructor_arguments env closed = function
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| Pcstr_tuple l ->
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let l = List.map (transl_simple_type env closed) l in
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Types.Cstr_tuple (List.map (fun t -> t.ctyp_type) l),
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Cstr_tuple l
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| Pcstr_record l ->
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let lbls, lbls' = transl_labels env closed l in
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Types.Cstr_record lbls',
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Cstr_record lbls
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let make_constructor env type_path type_params sargs sret_type =
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match sret_type with
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| None ->
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let args, targs =
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transl_constructor_arguments env true sargs
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in
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targs, None, args, None
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| Some sret_type ->
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(* if it's a generalized constructor we must first narrow and
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then widen so as to not introduce any new constraints *)
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let z = narrow () in
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reset_type_variables ();
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let args, targs =
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transl_constructor_arguments env false sargs
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in
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let tret_type = transl_simple_type env false sret_type in
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let ret_type = tret_type.ctyp_type in
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(* TODO add back type_path as a parameter ? *)
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begin match (Ctype.repr ret_type).desc with
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| Tconstr (p', _, _) when Path.same type_path p' -> ()
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| _ ->
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raise (Error (sret_type.ptyp_loc, Constraint_failed
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(ret_type, Ctype.newconstr type_path type_params)))
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end;
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widen z;
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targs, Some tret_type, args, Some ret_type
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let transl_declaration env sdecl (id, uid) =
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(* Bind type parameters *)
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reset_type_variables();
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Ctype.begin_def ();
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let tparams = make_params env sdecl.ptype_params in
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let params = List.map (fun (cty, _) -> cty.ctyp_type) tparams in
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let cstrs = List.map
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(fun (sty, sty', loc) ->
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transl_simple_type env false sty,
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transl_simple_type env false sty', loc)
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sdecl.ptype_cstrs
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in
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let raw_status = get_unboxed_from_attributes sdecl in
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if raw_status.unboxed && not raw_status.default then begin
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let bad msg = raise(Error(sdecl.ptype_loc, Bad_unboxed_attribute msg)) in
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match sdecl.ptype_kind with
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| Ptype_abstract -> bad "it is abstract"
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| Ptype_open -> bad "extensible variant types cannot be unboxed"
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| Ptype_record fields -> begin match fields with
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| [] -> bad "it has no fields"
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| _::_::_ -> bad "it has more than one field"
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| [{pld_mutable = Mutable}] -> bad "it is mutable"
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| [{pld_mutable = Immutable}] -> ()
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end
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| Ptype_variant constructors -> begin match constructors with
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| [] -> bad "it has no constructor"
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| (_::_::_) -> bad "it has more than one constructor"
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| [c] -> begin match c.pcd_args with
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| Pcstr_tuple [] ->
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bad "its constructor has no argument"
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| Pcstr_tuple (_::_::_) ->
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bad "its constructor has more than one argument"
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| Pcstr_tuple [_] ->
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()
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| Pcstr_record [] ->
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bad "its constructor has no fields"
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| Pcstr_record (_::_::_) ->
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bad "its constructor has more than one field"
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| Pcstr_record [{pld_mutable = Mutable}] ->
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bad "it is mutable"
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| Pcstr_record [{pld_mutable = Immutable}] ->
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()
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end
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end
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end;
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let unboxed_status =
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match sdecl.ptype_kind with
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| Ptype_variant [{pcd_args = Pcstr_tuple [_]; _}]
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| Ptype_variant [{pcd_args = Pcstr_record [{pld_mutable=Immutable; _}]; _}]
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| Ptype_record [{pld_mutable=Immutable; _}] -> raw_status
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| _ -> unboxed_false_default_false (* Not unboxable, mark as boxed *)
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in
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let unbox = unboxed_status.unboxed in
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let (tkind, kind) =
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match sdecl.ptype_kind with
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| Ptype_abstract -> Ttype_abstract, Type_abstract
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| Ptype_variant scstrs ->
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if List.exists (fun cstr -> cstr.pcd_res <> None) scstrs then begin
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match cstrs with
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[] -> ()
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| (_,_,loc)::_ ->
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Location.prerr_warning loc Warnings.Constraint_on_gadt
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end;
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let all_constrs = ref String.Set.empty in
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List.iter
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(fun {pcd_name = {txt = name}} ->
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if String.Set.mem name !all_constrs then
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raise(Error(sdecl.ptype_loc, Duplicate_constructor name));
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all_constrs := String.Set.add name !all_constrs)
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scstrs;
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if List.length
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(List.filter (fun cd -> cd.pcd_args <> Pcstr_tuple []) scstrs)
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> (Config.max_tag + 1) then
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raise(Error(sdecl.ptype_loc, Too_many_constructors));
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let make_cstr scstr =
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let name = Ident.create_local scstr.pcd_name.txt in
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let targs, tret_type, args, ret_type =
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make_constructor env (Path.Pident id) params
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scstr.pcd_args scstr.pcd_res
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in
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let tcstr =
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{ cd_id = name;
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cd_name = scstr.pcd_name;
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cd_args = targs;
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cd_res = tret_type;
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cd_loc = scstr.pcd_loc;
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cd_attributes = scstr.pcd_attributes }
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in
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let cstr =
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{ Types.cd_id = name;
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cd_args = args;
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cd_res = ret_type;
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cd_loc = scstr.pcd_loc;
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cd_attributes = scstr.pcd_attributes;
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cd_uid = Uid.mk ~current_unit:(Env.get_unit_name ()) }
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in
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tcstr, cstr
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in
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let make_cstr scstr =
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Builtin_attributes.warning_scope scstr.pcd_attributes
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(fun () -> make_cstr scstr)
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in
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let tcstrs, cstrs = List.split (List.map make_cstr scstrs) in
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Ttype_variant tcstrs, Type_variant cstrs
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| Ptype_record lbls ->
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let lbls, lbls' = transl_labels env true lbls in
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let rep =
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if unbox then Record_unboxed false
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else if List.for_all (fun l -> is_float env l.Types.ld_type) lbls'
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then Record_float
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else Record_regular
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in
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Ttype_record lbls, Type_record(lbls', rep)
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| Ptype_open -> Ttype_open, Type_open
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in
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let (tman, man) = match sdecl.ptype_manifest with
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None -> None, None
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| Some sty ->
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let no_row = not (is_fixed_type sdecl) in
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let cty = transl_simple_type env no_row sty in
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Some cty, Some cty.ctyp_type
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in
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let arity = List.length params in
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let decl =
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{ type_params = params;
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type_arity = arity;
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type_kind = kind;
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type_private = sdecl.ptype_private;
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type_manifest = man;
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type_variance = Variance.unknown_signature ~injective:false ~arity;
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type_separability = Types.Separability.default_signature ~arity;
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type_is_newtype = false;
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type_expansion_scope = Btype.lowest_level;
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type_loc = sdecl.ptype_loc;
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type_attributes = sdecl.ptype_attributes;
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type_immediate = Unknown;
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type_unboxed = unboxed_status;
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type_uid = uid;
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} in
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(* Check constraints *)
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List.iter
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(fun (cty, cty', loc) ->
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let ty = cty.ctyp_type in
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let ty' = cty'.ctyp_type in
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try Ctype.unify env ty ty' with Ctype.Unify tr ->
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raise(Error(loc, Inconsistent_constraint (env, tr))))
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cstrs;
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Ctype.end_def ();
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(* Add abstract row *)
|
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if is_fixed_type sdecl then begin
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let p, _ =
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try Env.find_type_by_name
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(Longident.Lident(Ident.name id ^ "#row")) env
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with Not_found -> assert false
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in
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set_fixed_row env sdecl.ptype_loc p decl
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end;
|
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(* Check for cyclic abbreviations *)
|
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begin match decl.type_manifest with None -> ()
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| Some ty ->
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if Ctype.cyclic_abbrev env id ty then
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raise(Error(sdecl.ptype_loc, Recursive_abbrev sdecl.ptype_name.txt));
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end;
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{
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typ_id = id;
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typ_name = sdecl.ptype_name;
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typ_params = tparams;
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typ_type = decl;
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typ_cstrs = cstrs;
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typ_loc = sdecl.ptype_loc;
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typ_manifest = tman;
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typ_kind = tkind;
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typ_private = sdecl.ptype_private;
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typ_attributes = sdecl.ptype_attributes;
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}
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|
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(* Generalize a type declaration *)
|
|
|
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let generalize_decl decl =
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List.iter Ctype.generalize decl.type_params;
|
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Btype.iter_type_expr_kind Ctype.generalize decl.type_kind;
|
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begin match decl.type_manifest with
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| None -> ()
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| Some ty -> Ctype.generalize ty
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end
|
|
|
|
(* Check that all constraints are enforced *)
|
|
|
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module TypeSet = Btype.TypeSet
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|
module TypeMap = Btype.TypeMap
|
|
|
|
let rec check_constraints_rec env loc visited ty =
|
|
let ty = Ctype.repr ty in
|
|
if TypeSet.mem ty !visited then () else begin
|
|
visited := TypeSet.add ty !visited;
|
|
match ty.desc with
|
|
| Tconstr (path, args, _) ->
|
|
let args' = List.map (fun _ -> Ctype.newvar ()) args in
|
|
let ty' = Ctype.newconstr path args' in
|
|
begin try Ctype.enforce_constraints env ty'
|
|
with Ctype.Unify _ -> assert false
|
|
| Not_found -> raise (Error(loc, Unavailable_type_constructor path))
|
|
end;
|
|
if not (Ctype.matches env ty ty') then
|
|
raise (Error(loc, Constraint_failed (ty, ty')));
|
|
List.iter (check_constraints_rec env loc visited) args
|
|
| Tpoly (ty, tl) ->
|
|
let _, ty = Ctype.instance_poly false tl ty in
|
|
check_constraints_rec env loc visited ty
|
|
| _ ->
|
|
Btype.iter_type_expr (check_constraints_rec env loc visited) ty
|
|
end
|
|
|
|
let check_constraints_labels env visited l pl =
|
|
let rec get_loc name = function
|
|
[] -> assert false
|
|
| pld :: tl ->
|
|
if name = pld.pld_name.txt then pld.pld_type.ptyp_loc
|
|
else get_loc name tl
|
|
in
|
|
List.iter
|
|
(fun {Types.ld_id=name; ld_type=ty} ->
|
|
check_constraints_rec env (get_loc (Ident.name name) pl) visited ty)
|
|
l
|
|
|
|
let check_constraints env sdecl (_, decl) =
|
|
let visited = ref TypeSet.empty in
|
|
begin match decl.type_kind with
|
|
| Type_abstract -> ()
|
|
| Type_variant l ->
|
|
let find_pl = function
|
|
Ptype_variant pl -> pl
|
|
| Ptype_record _ | Ptype_abstract | Ptype_open -> assert false
|
|
in
|
|
let pl = find_pl sdecl.ptype_kind in
|
|
let pl_index =
|
|
let foldf acc x =
|
|
String.Map.add x.pcd_name.txt x acc
|
|
in
|
|
List.fold_left foldf String.Map.empty pl
|
|
in
|
|
List.iter
|
|
(fun {Types.cd_id=name; cd_args; cd_res} ->
|
|
let {pcd_args; pcd_res; _} =
|
|
try String.Map.find (Ident.name name) pl_index
|
|
with Not_found -> assert false in
|
|
begin match cd_args, pcd_args with
|
|
| Cstr_tuple tyl, Pcstr_tuple styl ->
|
|
List.iter2
|
|
(fun sty ty ->
|
|
check_constraints_rec env sty.ptyp_loc visited ty)
|
|
styl tyl
|
|
| Cstr_record tyl, Pcstr_record styl ->
|
|
check_constraints_labels env visited tyl styl
|
|
| _ -> assert false
|
|
end;
|
|
match pcd_res, cd_res with
|
|
| Some sr, Some r ->
|
|
check_constraints_rec env sr.ptyp_loc visited r
|
|
| _ ->
|
|
() )
|
|
l
|
|
| Type_record (l, _) ->
|
|
let find_pl = function
|
|
Ptype_record pl -> pl
|
|
| Ptype_variant _ | Ptype_abstract | Ptype_open -> assert false
|
|
in
|
|
let pl = find_pl sdecl.ptype_kind in
|
|
check_constraints_labels env visited l pl
|
|
| Type_open -> ()
|
|
end;
|
|
begin match decl.type_manifest with
|
|
| None -> ()
|
|
| Some ty ->
|
|
let sty =
|
|
match sdecl.ptype_manifest with Some sty -> sty | _ -> assert false
|
|
in
|
|
check_constraints_rec env sty.ptyp_loc visited ty
|
|
end
|
|
|
|
(*
|
|
If both a variant/record definition and a type equation are given,
|
|
need to check that the equation refers to a type of the same kind
|
|
with the same constructors and labels.
|
|
*)
|
|
let check_coherence env loc dpath decl =
|
|
match decl with
|
|
{ type_kind = (Type_variant _ | Type_record _| Type_open);
|
|
type_manifest = Some ty } ->
|
|
begin match (Ctype.repr ty).desc with
|
|
Tconstr(path, args, _) ->
|
|
begin try
|
|
let decl' = Env.find_type path env in
|
|
let err =
|
|
if List.length args <> List.length decl.type_params
|
|
then Some Includecore.Arity
|
|
else if not (Ctype.equal env false args decl.type_params)
|
|
then Some Includecore.Constraint
|
|
else
|
|
Includecore.type_declarations ~loc ~equality:true env
|
|
~mark:true
|
|
(Path.last path)
|
|
decl'
|
|
dpath
|
|
(Subst.type_declaration
|
|
(Subst.add_type_path dpath path Subst.identity) decl)
|
|
in
|
|
if err <> None then
|
|
raise(Error(loc, Definition_mismatch (ty, err)))
|
|
with Not_found ->
|
|
raise(Error(loc, Unavailable_type_constructor path))
|
|
end
|
|
| _ -> raise(Error(loc, Definition_mismatch (ty, None)))
|
|
end
|
|
| _ -> ()
|
|
|
|
let check_abbrev env sdecl (id, decl) =
|
|
check_coherence env sdecl.ptype_loc (Path.Pident id) decl
|
|
|
|
(* Check that recursion is well-founded *)
|
|
|
|
let check_well_founded env loc path to_check ty =
|
|
let visited = ref TypeMap.empty in
|
|
let rec check ty0 parents ty =
|
|
let ty = Btype.repr ty in
|
|
if TypeSet.mem ty parents then begin
|
|
(*Format.eprintf "@[%a@]@." Printtyp.raw_type_expr ty;*)
|
|
if match ty0.desc with
|
|
| Tconstr (p, _, _) -> Path.same p path
|
|
| _ -> false
|
|
then raise (Error (loc, Recursive_abbrev (Path.name path)))
|
|
else raise (Error (loc, Cycle_in_def (Path.name path, ty0)))
|
|
end;
|
|
let (fini, parents) =
|
|
try
|
|
let prev = TypeMap.find ty !visited in
|
|
if TypeSet.subset parents prev then (true, parents) else
|
|
(false, TypeSet.union parents prev)
|
|
with Not_found ->
|
|
(false, parents)
|
|
in
|
|
if fini then () else
|
|
let rec_ok =
|
|
match ty.desc with
|
|
Tconstr(p,_,_) ->
|
|
!Clflags.recursive_types && Ctype.is_contractive env p
|
|
| Tobject _ | Tvariant _ -> true
|
|
| _ -> !Clflags.recursive_types
|
|
in
|
|
let visited' = TypeMap.add ty parents !visited in
|
|
let arg_exn =
|
|
try
|
|
visited := visited';
|
|
let parents =
|
|
if rec_ok then TypeSet.empty else TypeSet.add ty parents in
|
|
Btype.iter_type_expr (check ty0 parents) ty;
|
|
None
|
|
with e ->
|
|
visited := visited'; Some e
|
|
in
|
|
match ty.desc with
|
|
| Tconstr(p, _, _) when arg_exn <> None || to_check p ->
|
|
if to_check p then Option.iter raise arg_exn
|
|
else Btype.iter_type_expr (check ty0 TypeSet.empty) ty;
|
|
begin try
|
|
let ty' = Ctype.try_expand_once_opt env ty in
|
|
let ty0 = if TypeSet.is_empty parents then ty else ty0 in
|
|
check ty0 (TypeSet.add ty parents) ty'
|
|
with
|
|
Ctype.Cannot_expand -> Option.iter raise arg_exn
|
|
end
|
|
| _ -> Option.iter raise arg_exn
|
|
in
|
|
let snap = Btype.snapshot () in
|
|
try Ctype.wrap_trace_gadt_instances env (check ty TypeSet.empty) ty
|
|
with Ctype.Unify _ ->
|
|
(* Will be detected by check_recursion *)
|
|
Btype.backtrack snap
|
|
|
|
let check_well_founded_manifest env loc path decl =
|
|
if decl.type_manifest = None then () else
|
|
let args = List.map (fun _ -> Ctype.newvar()) decl.type_params in
|
|
check_well_founded env loc path (Path.same path) (Ctype.newconstr path args)
|
|
|
|
let check_well_founded_decl env loc path decl to_check =
|
|
let open Btype in
|
|
let it =
|
|
{type_iterators with
|
|
it_type_expr = (fun _ -> check_well_founded env loc path to_check)} in
|
|
it.it_type_declaration it (Ctype.generic_instance_declaration decl)
|
|
|
|
(* Check for ill-defined abbrevs *)
|
|
|
|
let check_recursion env loc path decl to_check =
|
|
(* to_check is true for potentially mutually recursive paths.
|
|
(path, decl) is the type declaration to be checked. *)
|
|
|
|
if decl.type_params = [] then () else
|
|
|
|
let visited = ref [] in
|
|
|
|
let rec check_regular cpath args prev_exp prev_expansions ty =
|
|
let ty = Ctype.repr ty in
|
|
if not (List.memq ty !visited) then begin
|
|
visited := ty :: !visited;
|
|
match ty.desc with
|
|
| Tconstr(path', args', _) ->
|
|
if Path.same path path' then begin
|
|
if not (Ctype.equal env false args args') then
|
|
raise (Error(loc,
|
|
Non_regular {
|
|
definition=path;
|
|
used_as=ty;
|
|
defined_as=Ctype.newconstr path args;
|
|
expansions=List.rev prev_expansions;
|
|
}))
|
|
end
|
|
(* Attempt to expand a type abbreviation if:
|
|
1- [to_check path'] holds
|
|
(otherwise the expansion cannot involve [path]);
|
|
2- we haven't expanded this type constructor before
|
|
(otherwise we could loop if [path'] is itself
|
|
a non-regular abbreviation). *)
|
|
else if to_check path' && not (List.mem path' prev_exp) then begin
|
|
try
|
|
(* Attempt expansion *)
|
|
let (params0, body0, _) = Env.find_type_expansion path' env in
|
|
let (params, body) =
|
|
Ctype.instance_parameterized_type params0 body0 in
|
|
begin
|
|
try List.iter2 (Ctype.unify env) params args'
|
|
with Ctype.Unify _ ->
|
|
raise (Error(loc, Constraint_failed
|
|
(ty, Ctype.newconstr path' params0)));
|
|
end;
|
|
check_regular path' args
|
|
(path' :: prev_exp) ((ty,body) :: prev_expansions)
|
|
body
|
|
with Not_found -> ()
|
|
end;
|
|
List.iter (check_regular cpath args prev_exp prev_expansions) args'
|
|
| Tpoly (ty, tl) ->
|
|
let (_, ty) = Ctype.instance_poly ~keep_names:true false tl ty in
|
|
check_regular cpath args prev_exp prev_expansions ty
|
|
| _ ->
|
|
Btype.iter_type_expr
|
|
(check_regular cpath args prev_exp prev_expansions) ty
|
|
end in
|
|
|
|
Option.iter
|
|
(fun body ->
|
|
let (args, body) =
|
|
Ctype.instance_parameterized_type
|
|
~keep_names:true decl.type_params body in
|
|
check_regular path args [] [] body)
|
|
decl.type_manifest
|
|
|
|
let check_abbrev_recursion env id_loc_list to_check tdecl =
|
|
let decl = tdecl.typ_type in
|
|
let id = tdecl.typ_id in
|
|
check_recursion env (List.assoc id id_loc_list) (Path.Pident id) decl to_check
|
|
|
|
let check_duplicates sdecl_list =
|
|
let labels = Hashtbl.create 7 and constrs = Hashtbl.create 7 in
|
|
List.iter
|
|
(fun sdecl -> match sdecl.ptype_kind with
|
|
Ptype_variant cl ->
|
|
List.iter
|
|
(fun pcd ->
|
|
try
|
|
let name' = Hashtbl.find constrs pcd.pcd_name.txt in
|
|
Location.prerr_warning pcd.pcd_loc
|
|
(Warnings.Duplicate_definitions
|
|
("constructor", pcd.pcd_name.txt, name',
|
|
sdecl.ptype_name.txt))
|
|
with Not_found ->
|
|
Hashtbl.add constrs pcd.pcd_name.txt sdecl.ptype_name.txt)
|
|
cl
|
|
| Ptype_record fl ->
|
|
List.iter
|
|
(fun {pld_name=cname;pld_loc=loc} ->
|
|
try
|
|
let name' = Hashtbl.find labels cname.txt in
|
|
Location.prerr_warning loc
|
|
(Warnings.Duplicate_definitions
|
|
("label", cname.txt, name', sdecl.ptype_name.txt))
|
|
with Not_found -> Hashtbl.add labels cname.txt sdecl.ptype_name.txt)
|
|
fl
|
|
| Ptype_abstract -> ()
|
|
| Ptype_open -> ())
|
|
sdecl_list
|
|
|
|
(* Force recursion to go through id for private types*)
|
|
let name_recursion sdecl id decl =
|
|
match decl with
|
|
| { type_kind = Type_abstract;
|
|
type_manifest = Some ty;
|
|
type_private = Private; } when is_fixed_type sdecl ->
|
|
let ty = Ctype.repr ty in
|
|
let ty' = Btype.newty2 ty.level ty.desc in
|
|
if Ctype.deep_occur ty ty' then
|
|
let td = Tconstr(Path.Pident id, decl.type_params, ref Mnil) in
|
|
Btype.link_type ty (Btype.newty2 ty.level td);
|
|
{decl with type_manifest = Some ty'}
|
|
else decl
|
|
| _ -> decl
|
|
|
|
let name_recursion_decls sdecls decls =
|
|
List.map2 (fun sdecl (id, decl) -> (id, name_recursion sdecl id decl))
|
|
sdecls decls
|
|
|
|
(* Warn on definitions of type "type foo = ()" which redefine a different unit
|
|
type and are likely a mistake. *)
|
|
let check_redefined_unit (td: Parsetree.type_declaration) =
|
|
let open Parsetree in
|
|
let is_unit_constructor cd = cd.pcd_name.txt = "()" in
|
|
match td with
|
|
| { ptype_name = { txt = name };
|
|
ptype_manifest = None;
|
|
ptype_kind = Ptype_variant [ cd ] }
|
|
when is_unit_constructor cd ->
|
|
Location.prerr_warning td.ptype_loc (Warnings.Redefining_unit name)
|
|
| _ ->
|
|
()
|
|
|
|
let add_types_to_env decls env =
|
|
List.fold_right
|
|
(fun (id, decl) env -> add_type ~check:true id decl env)
|
|
decls env
|
|
|
|
(* Translate a set of type declarations, mutually recursive or not *)
|
|
let transl_type_decl env rec_flag sdecl_list =
|
|
List.iter check_redefined_unit sdecl_list;
|
|
(* Add dummy types for fixed rows *)
|
|
let fixed_types = List.filter is_fixed_type sdecl_list in
|
|
let sdecl_list =
|
|
List.map
|
|
(fun sdecl ->
|
|
let ptype_name =
|
|
let loc = { sdecl.ptype_name.loc with Location.loc_ghost = true } in
|
|
mkloc (sdecl.ptype_name.txt ^"#row") loc
|
|
in
|
|
let ptype_kind = Ptype_abstract in
|
|
let ptype_manifest = None in
|
|
let ptype_loc = { sdecl.ptype_loc with Location.loc_ghost = true } in
|
|
{sdecl with
|
|
ptype_name; ptype_kind; ptype_manifest; ptype_loc })
|
|
fixed_types
|
|
@ sdecl_list
|
|
in
|
|
|
|
(* Create identifiers. *)
|
|
let scope = Ctype.create_scope () in
|
|
let ids_list =
|
|
List.map (fun sdecl ->
|
|
Ident.create_scoped ~scope sdecl.ptype_name.txt,
|
|
Uid.mk ~current_unit:(Env.get_unit_name ())
|
|
) sdecl_list
|
|
in
|
|
Ctype.begin_def();
|
|
(* Enter types. *)
|
|
let temp_env =
|
|
List.fold_left2 (enter_type rec_flag) env sdecl_list ids_list in
|
|
(* Translate each declaration. *)
|
|
let current_slot = ref None in
|
|
let warn_unused = Warnings.is_active (Warnings.Unused_type_declaration "") in
|
|
let ids_slots (id, _uid as ids) =
|
|
match rec_flag with
|
|
| Asttypes.Recursive when warn_unused ->
|
|
(* See typecore.ml for a description of the algorithm used
|
|
to detect unused declarations in a set of recursive definitions. *)
|
|
let slot = ref [] in
|
|
let td = Env.find_type (Path.Pident id) temp_env in
|
|
Env.set_type_used_callback
|
|
td
|
|
(fun old_callback ->
|
|
match !current_slot with
|
|
| Some slot -> slot := td.type_uid :: !slot
|
|
| None ->
|
|
List.iter Env.mark_type_used (get_ref slot);
|
|
old_callback ()
|
|
);
|
|
ids, Some slot
|
|
| Asttypes.Recursive | Asttypes.Nonrecursive ->
|
|
ids, None
|
|
in
|
|
let transl_declaration name_sdecl (id, slot) =
|
|
current_slot := slot;
|
|
Builtin_attributes.warning_scope
|
|
name_sdecl.ptype_attributes
|
|
(fun () -> transl_declaration temp_env name_sdecl id)
|
|
in
|
|
let tdecls =
|
|
List.map2 transl_declaration sdecl_list (List.map ids_slots ids_list) in
|
|
let decls =
|
|
List.map (fun tdecl -> (tdecl.typ_id, tdecl.typ_type)) tdecls in
|
|
current_slot := None;
|
|
(* Check for duplicates *)
|
|
check_duplicates sdecl_list;
|
|
(* Build the final env. *)
|
|
let new_env = add_types_to_env decls env in
|
|
(* Update stubs *)
|
|
begin match rec_flag with
|
|
| Asttypes.Nonrecursive -> ()
|
|
| Asttypes.Recursive ->
|
|
List.iter2
|
|
(fun (id, _) sdecl -> update_type temp_env new_env id sdecl.ptype_loc)
|
|
ids_list sdecl_list
|
|
end;
|
|
(* Generalize type declarations. *)
|
|
Ctype.end_def();
|
|
List.iter (fun (_, decl) -> generalize_decl decl) decls;
|
|
(* Check for ill-formed abbrevs *)
|
|
let id_loc_list =
|
|
List.map2 (fun (id, _) sdecl -> (id, sdecl.ptype_loc))
|
|
ids_list sdecl_list
|
|
in
|
|
List.iter (fun (id, decl) ->
|
|
check_well_founded_manifest new_env (List.assoc id id_loc_list)
|
|
(Path.Pident id) decl)
|
|
decls;
|
|
let to_check =
|
|
function Path.Pident id -> List.mem_assoc id id_loc_list | _ -> false in
|
|
List.iter (fun (id, decl) ->
|
|
check_well_founded_decl new_env (List.assoc id id_loc_list) (Path.Pident id)
|
|
decl to_check)
|
|
decls;
|
|
List.iter (check_abbrev_recursion new_env id_loc_list to_check) tdecls;
|
|
(* Check that all type variables are closed *)
|
|
List.iter2
|
|
(fun sdecl tdecl ->
|
|
let decl = tdecl.typ_type in
|
|
match Ctype.closed_type_decl decl with
|
|
Some ty -> raise(Error(sdecl.ptype_loc, Unbound_type_var(ty,decl)))
|
|
| None -> ())
|
|
sdecl_list tdecls;
|
|
(* Check that constraints are enforced *)
|
|
List.iter2 (check_constraints new_env) sdecl_list decls;
|
|
(* Add type properties to declarations *)
|
|
let decls =
|
|
try
|
|
decls
|
|
|> name_recursion_decls sdecl_list
|
|
|> Typedecl_variance.update_decls env sdecl_list
|
|
|> Typedecl_immediacy.update_decls env
|
|
|> Typedecl_separability.update_decls env
|
|
with
|
|
| Typedecl_variance.Error (loc, err) ->
|
|
raise (Error (loc, Variance err))
|
|
| Typedecl_immediacy.Error (loc, err) ->
|
|
raise (Error (loc, Immediacy err))
|
|
| Typedecl_separability.Error (loc, err) ->
|
|
raise (Error (loc, Separability err))
|
|
in
|
|
(* Compute the final environment with variance and immediacy *)
|
|
let final_env = add_types_to_env decls env in
|
|
(* Check re-exportation *)
|
|
List.iter2 (check_abbrev final_env) sdecl_list decls;
|
|
(* Keep original declaration *)
|
|
let final_decls =
|
|
List.map2
|
|
(fun tdecl (_id2, decl) ->
|
|
{ tdecl with typ_type = decl }
|
|
) tdecls decls
|
|
in
|
|
(* Done *)
|
|
(final_decls, final_env)
|
|
|
|
(* Translating type extensions *)
|
|
|
|
let transl_extension_constructor ~scope env type_path type_params
|
|
typext_params priv sext =
|
|
let id = Ident.create_scoped ~scope sext.pext_name.txt in
|
|
let args, ret_type, kind =
|
|
match sext.pext_kind with
|
|
Pext_decl(sargs, sret_type) ->
|
|
let targs, tret_type, args, ret_type =
|
|
make_constructor env type_path typext_params
|
|
sargs sret_type
|
|
in
|
|
args, ret_type, Text_decl(targs, tret_type)
|
|
| Pext_rebind lid ->
|
|
let usage = if priv = Public then Env.Positive else Env.Privatize in
|
|
let cdescr = Env.lookup_constructor ~loc:lid.loc usage lid.txt env in
|
|
let (args, cstr_res) = Ctype.instance_constructor cdescr in
|
|
let res, ret_type =
|
|
if cdescr.cstr_generalized then
|
|
let params = Ctype.instance_list type_params in
|
|
let res = Ctype.newconstr type_path params in
|
|
let ret_type = Some (Ctype.newconstr type_path params) in
|
|
res, ret_type
|
|
else (Ctype.newconstr type_path typext_params), None
|
|
in
|
|
begin
|
|
try
|
|
Ctype.unify env cstr_res res
|
|
with Ctype.Unify trace ->
|
|
raise (Error(lid.loc,
|
|
Rebind_wrong_type(lid.txt, env, trace)))
|
|
end;
|
|
(* Remove "_" names from parameters used in the constructor *)
|
|
if not cdescr.cstr_generalized then begin
|
|
let vars =
|
|
Ctype.free_variables (Btype.newgenty (Ttuple args))
|
|
in
|
|
List.iter
|
|
(function {desc = Tvar (Some "_")} as ty ->
|
|
if List.memq ty vars then ty.desc <- Tvar None
|
|
| _ -> ())
|
|
typext_params
|
|
end;
|
|
(* Ensure that constructor's type matches the type being extended *)
|
|
let cstr_type_path, cstr_type_params =
|
|
match cdescr.cstr_res.desc with
|
|
Tconstr (p, _, _) ->
|
|
let decl = Env.find_type p env in
|
|
p, decl.type_params
|
|
| _ -> assert false
|
|
in
|
|
let cstr_types =
|
|
(Btype.newgenty
|
|
(Tconstr(cstr_type_path, cstr_type_params, ref Mnil)))
|
|
:: cstr_type_params
|
|
in
|
|
let ext_types =
|
|
(Btype.newgenty
|
|
(Tconstr(type_path, type_params, ref Mnil)))
|
|
:: type_params
|
|
in
|
|
if not (Ctype.equal env true cstr_types ext_types) then
|
|
raise (Error(lid.loc,
|
|
Rebind_mismatch(lid.txt, cstr_type_path, type_path)));
|
|
(* Disallow rebinding private constructors to non-private *)
|
|
begin
|
|
match cdescr.cstr_private, priv with
|
|
Private, Public ->
|
|
raise (Error(lid.loc, Rebind_private lid.txt))
|
|
| _ -> ()
|
|
end;
|
|
let path =
|
|
match cdescr.cstr_tag with
|
|
Cstr_extension(path, _) -> path
|
|
| _ -> assert false
|
|
in
|
|
let args =
|
|
match cdescr.cstr_inlined with
|
|
| None ->
|
|
Types.Cstr_tuple args
|
|
| Some decl ->
|
|
let tl =
|
|
match args with
|
|
| [ {desc=Tconstr(_, tl, _)} ] -> tl
|
|
| _ -> assert false
|
|
in
|
|
let decl = Ctype.instance_declaration decl in
|
|
assert (List.length decl.type_params = List.length tl);
|
|
List.iter2 (Ctype.unify env) decl.type_params tl;
|
|
let lbls =
|
|
match decl.type_kind with
|
|
| Type_record (lbls, Record_extension _) -> lbls
|
|
| _ -> assert false
|
|
in
|
|
Types.Cstr_record lbls
|
|
in
|
|
args, ret_type, Text_rebind(path, lid)
|
|
in
|
|
let ext =
|
|
{ ext_type_path = type_path;
|
|
ext_type_params = typext_params;
|
|
ext_args = args;
|
|
ext_ret_type = ret_type;
|
|
ext_private = priv;
|
|
Types.ext_loc = sext.pext_loc;
|
|
Types.ext_attributes = sext.pext_attributes;
|
|
ext_uid = Uid.mk ~current_unit:(Env.get_unit_name ());
|
|
}
|
|
in
|
|
{ ext_id = id;
|
|
ext_name = sext.pext_name;
|
|
ext_type = ext;
|
|
ext_kind = kind;
|
|
Typedtree.ext_loc = sext.pext_loc;
|
|
Typedtree.ext_attributes = sext.pext_attributes; }
|
|
|
|
let transl_extension_constructor ~scope env type_path type_params
|
|
typext_params priv sext =
|
|
Builtin_attributes.warning_scope sext.pext_attributes
|
|
(fun () -> transl_extension_constructor ~scope env type_path type_params
|
|
typext_params priv sext)
|
|
|
|
let is_rebind ext =
|
|
match ext.ext_kind with
|
|
| Text_rebind _ -> true
|
|
| Text_decl _ -> false
|
|
|
|
let transl_type_extension extend env loc styext =
|
|
(* Note: it would be incorrect to call [create_scope] *after*
|
|
[reset_type_variables] or after [begin_def] (see #10010). *)
|
|
let scope = Ctype.create_scope () in
|
|
reset_type_variables();
|
|
Ctype.begin_def();
|
|
let type_path, type_decl =
|
|
let lid = styext.ptyext_path in
|
|
Env.lookup_type ~loc:lid.loc lid.txt env
|
|
in
|
|
begin
|
|
match type_decl.type_kind with
|
|
| Type_open -> begin
|
|
match type_decl.type_private with
|
|
| Private when extend -> begin
|
|
match
|
|
List.find
|
|
(function {pext_kind = Pext_decl _} -> true
|
|
| {pext_kind = Pext_rebind _} -> false)
|
|
styext.ptyext_constructors
|
|
with
|
|
| {pext_loc} ->
|
|
raise (Error(pext_loc, Cannot_extend_private_type type_path))
|
|
| exception Not_found -> ()
|
|
end
|
|
| _ -> ()
|
|
end
|
|
| _ ->
|
|
raise (Error(loc, Not_extensible_type type_path))
|
|
end;
|
|
let type_variance =
|
|
List.map (fun v ->
|
|
let (co, cn) = Variance.get_upper v in
|
|
(not cn, not co, false))
|
|
type_decl.type_variance
|
|
in
|
|
let err =
|
|
if type_decl.type_arity <> List.length styext.ptyext_params then
|
|
Some Includecore.Arity
|
|
else
|
|
if List.for_all2
|
|
(fun (c1, n1, _) (c2, n2, _) -> (not c2 || c1) && (not n2 || n1))
|
|
type_variance
|
|
(Typedecl_variance.variance_of_params styext.ptyext_params)
|
|
then None else Some Includecore.Variance
|
|
in
|
|
begin match err with
|
|
| None -> ()
|
|
| Some err -> raise (Error(loc, Extension_mismatch (type_path, err)))
|
|
end;
|
|
let ttype_params = make_params env styext.ptyext_params in
|
|
let type_params = List.map (fun (cty, _) -> cty.ctyp_type) ttype_params in
|
|
List.iter2 (Ctype.unify_var env)
|
|
(Ctype.instance_list type_decl.type_params)
|
|
type_params;
|
|
let constructors =
|
|
List.map (transl_extension_constructor ~scope env type_path
|
|
type_decl.type_params type_params styext.ptyext_private)
|
|
styext.ptyext_constructors
|
|
in
|
|
Ctype.end_def();
|
|
(* Generalize types *)
|
|
List.iter Ctype.generalize type_params;
|
|
List.iter
|
|
(fun ext ->
|
|
Btype.iter_type_expr_cstr_args Ctype.generalize ext.ext_type.ext_args;
|
|
Option.iter Ctype.generalize ext.ext_type.ext_ret_type)
|
|
constructors;
|
|
(* Check that all type variables are closed *)
|
|
List.iter
|
|
(fun ext ->
|
|
match Ctype.closed_extension_constructor ext.ext_type with
|
|
Some ty ->
|
|
raise(Error(ext.ext_loc, Unbound_type_var_ext(ty, ext.ext_type)))
|
|
| None -> ())
|
|
constructors;
|
|
(* Check variances are correct *)
|
|
List.iter
|
|
(fun ext->
|
|
(* Note that [loc] here is distinct from [type_decl.type_loc], which
|
|
makes the [loc] parameter to this function useful. [loc] is the
|
|
location of the extension, while [type_decl] points to the original
|
|
type declaration being extended. *)
|
|
try Typedecl_variance.check_variance_extension
|
|
env type_decl ext (type_variance, loc)
|
|
with Typedecl_variance.Error (loc, err) ->
|
|
raise (Error (loc, Variance err)))
|
|
constructors;
|
|
(* Add extension constructors to the environment *)
|
|
let newenv =
|
|
List.fold_left
|
|
(fun env ext ->
|
|
let rebind = is_rebind ext in
|
|
Env.add_extension ~check:true ~rebind ext.ext_id ext.ext_type env)
|
|
env constructors
|
|
in
|
|
let tyext =
|
|
{ tyext_path = type_path;
|
|
tyext_txt = styext.ptyext_path;
|
|
tyext_params = ttype_params;
|
|
tyext_constructors = constructors;
|
|
tyext_private = styext.ptyext_private;
|
|
tyext_loc = styext.ptyext_loc;
|
|
tyext_attributes = styext.ptyext_attributes; }
|
|
in
|
|
(tyext, newenv)
|
|
|
|
let transl_type_extension extend env loc styext =
|
|
Builtin_attributes.warning_scope styext.ptyext_attributes
|
|
(fun () -> transl_type_extension extend env loc styext)
|
|
|
|
let transl_exception env sext =
|
|
let scope = Ctype.create_scope () in
|
|
reset_type_variables();
|
|
Ctype.begin_def();
|
|
let ext =
|
|
transl_extension_constructor ~scope env
|
|
Predef.path_exn [] [] Asttypes.Public sext
|
|
in
|
|
Ctype.end_def();
|
|
(* Generalize types *)
|
|
Btype.iter_type_expr_cstr_args Ctype.generalize ext.ext_type.ext_args;
|
|
Option.iter Ctype.generalize ext.ext_type.ext_ret_type;
|
|
(* Check that all type variables are closed *)
|
|
begin match Ctype.closed_extension_constructor ext.ext_type with
|
|
Some ty ->
|
|
raise (Error(ext.ext_loc, Unbound_type_var_ext(ty, ext.ext_type)))
|
|
| None -> ()
|
|
end;
|
|
let rebind = is_rebind ext in
|
|
let newenv =
|
|
Env.add_extension ~check:true ~rebind ext.ext_id ext.ext_type env
|
|
in
|
|
ext, newenv
|
|
|
|
let transl_type_exception env t =
|
|
Builtin_attributes.check_no_alert t.ptyexn_attributes;
|
|
let contructor, newenv =
|
|
Builtin_attributes.warning_scope t.ptyexn_attributes
|
|
(fun () ->
|
|
transl_exception env t.ptyexn_constructor
|
|
)
|
|
in
|
|
{tyexn_constructor = contructor;
|
|
tyexn_loc = t.ptyexn_loc;
|
|
tyexn_attributes = t.ptyexn_attributes}, newenv
|
|
|
|
|
|
type native_repr_attribute =
|
|
| Native_repr_attr_absent
|
|
| Native_repr_attr_present of native_repr_kind
|
|
|
|
let get_native_repr_attribute attrs ~global_repr =
|
|
match
|
|
Attr_helper.get_no_payload_attribute ["unboxed"; "ocaml.unboxed"] attrs,
|
|
Attr_helper.get_no_payload_attribute ["untagged"; "ocaml.untagged"] attrs,
|
|
global_repr
|
|
with
|
|
| None, None, None -> Native_repr_attr_absent
|
|
| None, None, Some repr -> Native_repr_attr_present repr
|
|
| Some _, None, None -> Native_repr_attr_present Unboxed
|
|
| None, Some _, None -> Native_repr_attr_present Untagged
|
|
| Some { Location.loc }, _, _
|
|
| _, Some { Location.loc }, _ ->
|
|
raise (Error (loc, Multiple_native_repr_attributes))
|
|
|
|
let native_repr_of_type env kind ty =
|
|
match kind, (Ctype.expand_head_opt env ty).desc with
|
|
| Untagged, Tconstr (path, _, _) when Path.same path Predef.path_int ->
|
|
Some Untagged_int
|
|
| Unboxed, Tconstr (path, _, _) when Path.same path Predef.path_float ->
|
|
Some Unboxed_float
|
|
| Unboxed, Tconstr (path, _, _) when Path.same path Predef.path_int32 ->
|
|
Some (Unboxed_integer Pint32)
|
|
| Unboxed, Tconstr (path, _, _) when Path.same path Predef.path_int64 ->
|
|
Some (Unboxed_integer Pint64)
|
|
| Unboxed, Tconstr (path, _, _) when Path.same path Predef.path_nativeint ->
|
|
Some (Unboxed_integer Pnativeint)
|
|
| _ ->
|
|
None
|
|
|
|
(* Raises an error when [core_type] contains an [@unboxed] or [@untagged]
|
|
attribute in a strict sub-term. *)
|
|
let error_if_has_deep_native_repr_attributes core_type =
|
|
let open Ast_iterator in
|
|
let this_iterator =
|
|
{ default_iterator with typ = fun iterator core_type ->
|
|
begin
|
|
match
|
|
get_native_repr_attribute core_type.ptyp_attributes ~global_repr:None
|
|
with
|
|
| Native_repr_attr_present kind ->
|
|
raise (Error (core_type.ptyp_loc,
|
|
Deep_unbox_or_untag_attribute kind))
|
|
| Native_repr_attr_absent -> ()
|
|
end;
|
|
default_iterator.typ iterator core_type }
|
|
in
|
|
default_iterator.typ this_iterator core_type
|
|
|
|
let make_native_repr env core_type ty ~global_repr =
|
|
error_if_has_deep_native_repr_attributes core_type;
|
|
match get_native_repr_attribute core_type.ptyp_attributes ~global_repr with
|
|
| Native_repr_attr_absent ->
|
|
Same_as_ocaml_repr
|
|
| Native_repr_attr_present kind ->
|
|
begin match native_repr_of_type env kind ty with
|
|
| None ->
|
|
raise (Error (core_type.ptyp_loc, Cannot_unbox_or_untag_type kind))
|
|
| Some repr -> repr
|
|
end
|
|
|
|
let rec parse_native_repr_attributes env core_type ty ~global_repr =
|
|
match core_type.ptyp_desc, (Ctype.repr ty).desc,
|
|
get_native_repr_attribute core_type.ptyp_attributes ~global_repr:None
|
|
with
|
|
| Ptyp_arrow _, Tarrow _, Native_repr_attr_present kind ->
|
|
raise (Error (core_type.ptyp_loc, Cannot_unbox_or_untag_type kind))
|
|
| Ptyp_arrow (_, ct1, ct2), Tarrow (_, t1, t2, _), _ ->
|
|
let repr_arg = make_native_repr env ct1 t1 ~global_repr in
|
|
let repr_args, repr_res =
|
|
parse_native_repr_attributes env ct2 t2 ~global_repr
|
|
in
|
|
(repr_arg :: repr_args, repr_res)
|
|
| Ptyp_arrow _, _, _ | _, Tarrow _, _ -> assert false
|
|
| _ -> ([], make_native_repr env core_type ty ~global_repr)
|
|
|
|
|
|
let check_unboxable env loc ty =
|
|
let check_type acc ty : Path.Set.t =
|
|
let ty = Ctype.repr (Ctype.expand_head_opt env ty) in
|
|
try match ty.desc with
|
|
| Tconstr (p, _, _) ->
|
|
let tydecl = Env.find_type p env in
|
|
if tydecl.type_unboxed.default then
|
|
Path.Set.add p acc
|
|
else acc
|
|
| _ -> acc
|
|
with Not_found -> acc
|
|
in
|
|
let all_unboxable_types = Btype.fold_type_expr check_type Path.Set.empty ty in
|
|
Path.Set.fold
|
|
(fun p () ->
|
|
Location.prerr_warning loc
|
|
(Warnings.Unboxable_type_in_prim_decl (Path.name p))
|
|
)
|
|
all_unboxable_types
|
|
()
|
|
|
|
(* Translate a value declaration *)
|
|
let transl_value_decl env loc valdecl =
|
|
let cty = Typetexp.transl_type_scheme env valdecl.pval_type in
|
|
let ty = cty.ctyp_type in
|
|
let v =
|
|
match valdecl.pval_prim with
|
|
[] when Env.is_in_signature env ->
|
|
{ val_type = ty; val_kind = Val_reg; Types.val_loc = loc;
|
|
val_attributes = valdecl.pval_attributes;
|
|
val_uid = Uid.mk ~current_unit:(Env.get_unit_name ());
|
|
}
|
|
| [] ->
|
|
raise (Error(valdecl.pval_loc, Val_in_structure))
|
|
| _ ->
|
|
let global_repr =
|
|
match
|
|
get_native_repr_attribute valdecl.pval_attributes ~global_repr:None
|
|
with
|
|
| Native_repr_attr_present repr -> Some repr
|
|
| Native_repr_attr_absent -> None
|
|
in
|
|
let native_repr_args, native_repr_res =
|
|
parse_native_repr_attributes env valdecl.pval_type ty ~global_repr
|
|
in
|
|
let prim =
|
|
Primitive.parse_declaration valdecl
|
|
~native_repr_args
|
|
~native_repr_res
|
|
in
|
|
if prim.prim_arity = 0 &&
|
|
(prim.prim_name = "" || prim.prim_name.[0] <> '%') then
|
|
raise(Error(valdecl.pval_type.ptyp_loc, Null_arity_external));
|
|
if !Clflags.native_code
|
|
&& prim.prim_arity > 5
|
|
&& prim.prim_native_name = ""
|
|
then raise(Error(valdecl.pval_type.ptyp_loc, Missing_native_external));
|
|
check_unboxable env loc ty;
|
|
{ val_type = ty; val_kind = Val_prim prim; Types.val_loc = loc;
|
|
val_attributes = valdecl.pval_attributes;
|
|
val_uid = Uid.mk ~current_unit:(Env.get_unit_name ());
|
|
}
|
|
in
|
|
let (id, newenv) =
|
|
Env.enter_value valdecl.pval_name.txt v env
|
|
~check:(fun s -> Warnings.Unused_value_declaration s)
|
|
in
|
|
let desc =
|
|
{
|
|
val_id = id;
|
|
val_name = valdecl.pval_name;
|
|
val_desc = cty; val_val = v;
|
|
val_prim = valdecl.pval_prim;
|
|
val_loc = valdecl.pval_loc;
|
|
val_attributes = valdecl.pval_attributes;
|
|
}
|
|
in
|
|
desc, newenv
|
|
|
|
let transl_value_decl env loc valdecl =
|
|
Builtin_attributes.warning_scope valdecl.pval_attributes
|
|
(fun () -> transl_value_decl env loc valdecl)
|
|
|
|
(* Translate a "with" constraint -- much simplified version of
|
|
transl_type_decl. For a constraint [Sig with t = sdecl],
|
|
there are two declarations of interest in two environments:
|
|
- [sig_decl] is the declaration of [t] in [Sig],
|
|
in the environment [sig_env] (containing the declarations
|
|
of [Sig] before [t])
|
|
- [sdecl] is the new syntactic declaration, to be type-checked
|
|
in the current, outer environment [with_env].
|
|
|
|
In particular, note that [sig_env] is an extension of
|
|
[outer_env].
|
|
*)
|
|
let transl_with_constraint id row_path ~sig_env ~sig_decl ~outer_env sdecl =
|
|
Env.mark_type_used sig_decl.type_uid;
|
|
reset_type_variables();
|
|
Ctype.begin_def();
|
|
(* In the first part of this function, we typecheck the syntactic
|
|
declaration [sdecl] in the outer environment [outer_env]. *)
|
|
let env = outer_env in
|
|
let loc = sdecl.ptype_loc in
|
|
let tparams = make_params env sdecl.ptype_params in
|
|
let params = List.map (fun (cty, _) -> cty.ctyp_type) tparams in
|
|
let arity = List.length params in
|
|
let constraints =
|
|
List.map (fun (ty, ty', loc) ->
|
|
let cty = transl_simple_type env false ty in
|
|
let cty' = transl_simple_type env false ty' in
|
|
(* Note: We delay the unification of those constraints
|
|
after the unification of parameters, so that clashing
|
|
constraints report an error on the constraint location
|
|
rather than the parameter location. *)
|
|
(cty, cty', loc)
|
|
) sdecl.ptype_cstrs
|
|
in
|
|
let no_row = not (is_fixed_type sdecl) in
|
|
let (tman, man) = match sdecl.ptype_manifest with
|
|
None -> None, None
|
|
| Some sty ->
|
|
let cty = transl_simple_type env no_row sty in
|
|
Some cty, Some cty.ctyp_type
|
|
in
|
|
(* In the second part, we check the consistency between the two
|
|
declarations and compute a "merged" declaration; we now need to
|
|
work in the larger signature environment [sig_env], because
|
|
[sig_decl.type_params] and [sig_decl.type_kind] are only valid
|
|
there. *)
|
|
let env = sig_env in
|
|
let sig_decl = Ctype.instance_declaration sig_decl in
|
|
let arity_ok = arity = sig_decl.type_arity in
|
|
if arity_ok then
|
|
List.iter2 (fun (cty, _) tparam ->
|
|
try Ctype.unify_var env cty.ctyp_type tparam
|
|
with Ctype.Unify tr ->
|
|
raise(Error(cty.ctyp_loc, Inconsistent_constraint (env, tr)))
|
|
) tparams sig_decl.type_params;
|
|
List.iter (fun (cty, cty', loc) ->
|
|
(* Note: constraints must also be enforced in [sig_env] because
|
|
they may contain parameter variables from [tparams]
|
|
that have now be unified in [sig_env]. *)
|
|
try Ctype.unify env cty.ctyp_type cty'.ctyp_type
|
|
with Ctype.Unify tr ->
|
|
raise(Error(loc, Inconsistent_constraint (env, tr)))
|
|
) constraints;
|
|
let priv =
|
|
if sdecl.ptype_private = Private then Private else
|
|
if arity_ok && sig_decl.type_kind <> Type_abstract
|
|
then sig_decl.type_private else sdecl.ptype_private
|
|
in
|
|
if arity_ok && sig_decl.type_kind <> Type_abstract
|
|
&& sdecl.ptype_private = Private then
|
|
Location.deprecated loc "spurious use of private";
|
|
let type_kind, type_unboxed =
|
|
if arity_ok && man <> None then
|
|
sig_decl.type_kind, sig_decl.type_unboxed
|
|
else
|
|
Type_abstract, unboxed_false_default_false
|
|
in
|
|
let new_sig_decl =
|
|
{ type_params = params;
|
|
type_arity = arity;
|
|
type_kind;
|
|
type_private = priv;
|
|
type_manifest = man;
|
|
type_variance = [];
|
|
type_separability = Types.Separability.default_signature ~arity;
|
|
type_is_newtype = false;
|
|
type_expansion_scope = Btype.lowest_level;
|
|
type_loc = loc;
|
|
type_attributes = sdecl.ptype_attributes;
|
|
type_immediate = Unknown;
|
|
type_unboxed;
|
|
type_uid = Uid.mk ~current_unit:(Env.get_unit_name ());
|
|
}
|
|
in
|
|
begin match row_path with None -> ()
|
|
| Some p -> set_fixed_row env loc p new_sig_decl
|
|
end;
|
|
begin match Ctype.closed_type_decl new_sig_decl with None -> ()
|
|
| Some ty -> raise(Error(loc, Unbound_type_var(ty, new_sig_decl)))
|
|
end;
|
|
let new_sig_decl = name_recursion sdecl id new_sig_decl in
|
|
let new_type_variance =
|
|
let required = Typedecl_variance.variance_of_sdecl sdecl in
|
|
try
|
|
Typedecl_variance.compute_decl env ~check:true new_sig_decl required
|
|
with Typedecl_variance.Error (loc, err) ->
|
|
raise (Error (loc, Variance err)) in
|
|
let new_type_immediate =
|
|
(* Typedecl_immediacy.compute_decl never raises *)
|
|
Typedecl_immediacy.compute_decl env new_sig_decl in
|
|
let new_type_separability =
|
|
try Typedecl_separability.compute_decl env new_sig_decl
|
|
with Typedecl_separability.Error (loc, err) ->
|
|
raise (Error (loc, Separability err)) in
|
|
let new_sig_decl =
|
|
(* we intentionally write this without a fragile { decl with ... }
|
|
to ensure that people adding new fields to type declarations
|
|
consider whether they need to recompute it here; for an example
|
|
of bug caused by the previous approach, see #9607 *)
|
|
{
|
|
type_params = new_sig_decl.type_params;
|
|
type_arity = new_sig_decl.type_arity;
|
|
type_kind = new_sig_decl.type_kind;
|
|
type_private = new_sig_decl.type_private;
|
|
type_manifest = new_sig_decl.type_manifest;
|
|
type_unboxed = new_sig_decl.type_unboxed;
|
|
type_is_newtype = new_sig_decl.type_is_newtype;
|
|
type_expansion_scope = new_sig_decl.type_expansion_scope;
|
|
type_loc = new_sig_decl.type_loc;
|
|
type_attributes = new_sig_decl.type_attributes;
|
|
type_uid = new_sig_decl.type_uid;
|
|
|
|
type_variance = new_type_variance;
|
|
type_immediate = new_type_immediate;
|
|
type_separability = new_type_separability;
|
|
} in
|
|
Ctype.end_def();
|
|
generalize_decl new_sig_decl;
|
|
{
|
|
typ_id = id;
|
|
typ_name = sdecl.ptype_name;
|
|
typ_params = tparams;
|
|
typ_type = new_sig_decl;
|
|
typ_cstrs = constraints;
|
|
typ_loc = loc;
|
|
typ_manifest = tman;
|
|
typ_kind = Ttype_abstract;
|
|
typ_private = sdecl.ptype_private;
|
|
typ_attributes = sdecl.ptype_attributes;
|
|
}
|
|
|
|
(* Approximate a type declaration: just make all types abstract *)
|
|
|
|
let abstract_type_decl ~injective arity =
|
|
let rec make_params n =
|
|
if n <= 0 then [] else Ctype.newvar() :: make_params (n-1) in
|
|
Ctype.begin_def();
|
|
let decl =
|
|
{ type_params = make_params arity;
|
|
type_arity = arity;
|
|
type_kind = Type_abstract;
|
|
type_private = Public;
|
|
type_manifest = None;
|
|
type_variance = Variance.unknown_signature ~injective ~arity;
|
|
type_separability = Types.Separability.default_signature ~arity;
|
|
type_is_newtype = false;
|
|
type_expansion_scope = Btype.lowest_level;
|
|
type_loc = Location.none;
|
|
type_attributes = [];
|
|
type_immediate = Unknown;
|
|
type_unboxed = unboxed_false_default_false;
|
|
type_uid = Uid.internal_not_actually_unique;
|
|
} in
|
|
Ctype.end_def();
|
|
generalize_decl decl;
|
|
decl
|
|
|
|
let approx_type_decl sdecl_list =
|
|
let scope = Ctype.create_scope () in
|
|
List.map
|
|
(fun sdecl ->
|
|
let injective = sdecl.ptype_kind <> Ptype_abstract in
|
|
(Ident.create_scoped ~scope sdecl.ptype_name.txt,
|
|
abstract_type_decl ~injective (List.length sdecl.ptype_params)))
|
|
sdecl_list
|
|
|
|
(* Variant of check_abbrev_recursion to check the well-formedness
|
|
conditions on type abbreviations defined within recursive modules. *)
|
|
|
|
let check_recmod_typedecl env loc recmod_ids path decl =
|
|
(* recmod_ids is the list of recursively-defined module idents.
|
|
(path, decl) is the type declaration to be checked. *)
|
|
let to_check path = Path.exists_free recmod_ids path in
|
|
check_well_founded_decl env loc path decl to_check;
|
|
check_recursion env loc path decl to_check;
|
|
(* additionally check coherece, as one might build an incoherent signature,
|
|
and use it to build an incoherent module, cf. #7851 *)
|
|
check_coherence env loc path decl
|
|
|
|
|
|
(**** Error report ****)
|
|
|
|
open Format
|
|
|
|
let explain_unbound_gen ppf tv tl typ kwd pr =
|
|
try
|
|
let ti = List.find (fun ti -> Ctype.deep_occur tv (typ ti)) tl in
|
|
let ty0 = (* Hack to force aliasing when needed *)
|
|
Btype.newgenty (Tobject(tv, ref None)) in
|
|
Printtyp.reset_and_mark_loops_list [typ ti; ty0];
|
|
fprintf ppf
|
|
".@.@[<hov2>In %s@ %a@;<1 -2>the variable %a is unbound@]"
|
|
kwd pr ti Printtyp.marked_type_expr tv
|
|
with Not_found -> ()
|
|
|
|
let explain_unbound ppf tv tl typ kwd lab =
|
|
explain_unbound_gen ppf tv tl typ kwd
|
|
(fun ppf ti ->
|
|
fprintf ppf "%s%a" (lab ti) Printtyp.marked_type_expr (typ ti)
|
|
)
|
|
|
|
let explain_unbound_single ppf tv ty =
|
|
let trivial ty =
|
|
explain_unbound ppf tv [ty] (fun t -> t) "type" (fun _ -> "") in
|
|
match (Ctype.repr ty).desc with
|
|
Tobject(fi,_) ->
|
|
let (tl, rv) = Ctype.flatten_fields fi in
|
|
if rv == tv then trivial ty else
|
|
explain_unbound ppf tv tl (fun (_,_,t) -> t)
|
|
"method" (fun (lab,_,_) -> lab ^ ": ")
|
|
| Tvariant row ->
|
|
let row = Btype.row_repr row in
|
|
if row.row_more == tv then trivial ty else
|
|
explain_unbound ppf tv row.row_fields
|
|
(fun (_l,f) -> match Btype.row_field_repr f with
|
|
Rpresent (Some t) -> t
|
|
| Reither (_,[t],_,_) -> t
|
|
| Reither (_,tl,_,_) -> Btype.newgenty (Ttuple tl)
|
|
| _ -> Btype.newgenty (Ttuple[]))
|
|
"case" (fun (lab,_) -> "`" ^ lab ^ " of ")
|
|
| _ -> trivial ty
|
|
|
|
|
|
let tys_of_constr_args = function
|
|
| Types.Cstr_tuple tl -> tl
|
|
| Types.Cstr_record lbls -> List.map (fun l -> l.Types.ld_type) lbls
|
|
|
|
let report_error ppf = function
|
|
| Repeated_parameter ->
|
|
fprintf ppf "A type parameter occurs several times"
|
|
| Duplicate_constructor s ->
|
|
fprintf ppf "Two constructors are named %s" s
|
|
| Too_many_constructors ->
|
|
fprintf ppf
|
|
"@[Too many non-constant constructors@ -- maximum is %i %s@]"
|
|
(Config.max_tag + 1) "non-constant constructors"
|
|
| Duplicate_label s ->
|
|
fprintf ppf "Two labels are named %s" s
|
|
| Recursive_abbrev s ->
|
|
fprintf ppf "The type abbreviation %s is cyclic" s
|
|
| Cycle_in_def (s, ty) ->
|
|
fprintf ppf "@[<v>The definition of %s contains a cycle:@ %a@]"
|
|
s Printtyp.type_expr ty
|
|
| Definition_mismatch (ty, None) ->
|
|
fprintf ppf "@[<v>@[<hov>%s@ %s@;<1 2>%a@]@]"
|
|
"This variant or record definition" "does not match that of type"
|
|
Printtyp.type_expr ty
|
|
| Definition_mismatch (ty, Some err) ->
|
|
fprintf ppf "@[<v>@[<hov>%s@ %s@;<1 2>%a@]%a@]"
|
|
"This variant or record definition" "does not match that of type"
|
|
Printtyp.type_expr ty
|
|
(Includecore.report_type_mismatch "the original" "this" "definition")
|
|
err
|
|
| Constraint_failed (ty, ty') ->
|
|
Printtyp.reset_and_mark_loops ty;
|
|
Printtyp.mark_loops ty';
|
|
Printtyp.Naming_context.reset ();
|
|
fprintf ppf "@[%s@ @[<hv>Type@ %a@ should be an instance of@ %a@]@]"
|
|
"Constraints are not satisfied in this type."
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false ty)
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false ty')
|
|
| Non_regular { definition; used_as; defined_as; expansions } ->
|
|
let pp_expansion ppf (ty,body) =
|
|
Format.fprintf ppf "%a = %a"
|
|
Printtyp.type_expr ty
|
|
Printtyp.type_expr body in
|
|
let comma ppf () = Format.fprintf ppf ",@;<1 2>" in
|
|
let pp_expansions ppf expansions =
|
|
Format.(pp_print_list ~pp_sep:comma pp_expansion) ppf expansions in
|
|
Printtyp.reset_and_mark_loops used_as;
|
|
Printtyp.mark_loops defined_as;
|
|
Printtyp.Naming_context.reset ();
|
|
begin match expansions with
|
|
| [] ->
|
|
fprintf ppf
|
|
"@[<hv>This recursive type is not regular.@ \
|
|
The type constructor %s is defined as@;<1 2>type %a@ \
|
|
but it is used as@;<1 2>%a.@ \
|
|
All uses need to match the definition for the recursive type \
|
|
to be regular.@]"
|
|
(Path.name definition)
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false defined_as)
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false used_as)
|
|
| _ :: _ ->
|
|
fprintf ppf
|
|
"@[<hv>This recursive type is not regular.@ \
|
|
The type constructor %s is defined as@;<1 2>type %a@ \
|
|
but it is used as@;<1 2>%a@ \
|
|
after the following expansion(s):@;<1 2>%a@ \
|
|
All uses need to match the definition for the recursive type \
|
|
to be regular.@]"
|
|
(Path.name definition)
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false defined_as)
|
|
!Oprint.out_type (Printtyp.tree_of_typexp false used_as)
|
|
pp_expansions expansions
|
|
end
|
|
| Inconsistent_constraint (env, trace) ->
|
|
fprintf ppf "The type constraints are not consistent.@.";
|
|
Printtyp.report_unification_error ppf env trace
|
|
(fun ppf -> fprintf ppf "Type")
|
|
(fun ppf -> fprintf ppf "is not compatible with type")
|
|
| Type_clash (env, trace) ->
|
|
Printtyp.report_unification_error ppf env trace
|
|
(function ppf ->
|
|
fprintf ppf "This type constructor expands to type")
|
|
(function ppf ->
|
|
fprintf ppf "but is used here with type")
|
|
| Null_arity_external ->
|
|
fprintf ppf "External identifiers must be functions"
|
|
| Missing_native_external ->
|
|
fprintf ppf "@[<hv>An external function with more than 5 arguments \
|
|
requires a second stub function@ \
|
|
for native-code compilation@]"
|
|
| Unbound_type_var (ty, decl) ->
|
|
fprintf ppf "A type variable is unbound in this type declaration";
|
|
let ty = Ctype.repr ty in
|
|
begin match decl.type_kind, decl.type_manifest with
|
|
| Type_variant tl, _ ->
|
|
explain_unbound_gen ppf ty tl (fun c ->
|
|
let tl = tys_of_constr_args c.Types.cd_args in
|
|
Btype.newgenty (Ttuple tl)
|
|
)
|
|
"case" (fun ppf c ->
|
|
fprintf ppf
|
|
"%a of %a" Printtyp.ident c.Types.cd_id
|
|
Printtyp.constructor_arguments c.Types.cd_args)
|
|
| Type_record (tl, _), _ ->
|
|
explain_unbound ppf ty tl (fun l -> l.Types.ld_type)
|
|
"field" (fun l -> Ident.name l.Types.ld_id ^ ": ")
|
|
| Type_abstract, Some ty' ->
|
|
explain_unbound_single ppf ty ty'
|
|
| _ -> ()
|
|
end
|
|
| Unbound_type_var_ext (ty, ext) ->
|
|
fprintf ppf "A type variable is unbound in this extension constructor";
|
|
let args = tys_of_constr_args ext.ext_args in
|
|
explain_unbound ppf ty args (fun c -> c) "type" (fun _ -> "")
|
|
| Cannot_extend_private_type path ->
|
|
fprintf ppf "@[%s@ %a@]"
|
|
"Cannot extend private type definition"
|
|
Printtyp.path path
|
|
| Not_extensible_type path ->
|
|
fprintf ppf "@[%s@ %a@ %s@]"
|
|
"Type definition"
|
|
Printtyp.path path
|
|
"is not extensible"
|
|
| Extension_mismatch (path, err) ->
|
|
fprintf ppf "@[<v>@[<hov>%s@ %s@;<1 2>%s@]%a@]"
|
|
"This extension" "does not match the definition of type"
|
|
(Path.name path)
|
|
(Includecore.report_type_mismatch
|
|
"the type" "this extension" "definition")
|
|
err
|
|
| Rebind_wrong_type (lid, env, trace) ->
|
|
Printtyp.report_unification_error ppf env trace
|
|
(function ppf ->
|
|
fprintf ppf "The constructor %a@ has type"
|
|
Printtyp.longident lid)
|
|
(function ppf ->
|
|
fprintf ppf "but was expected to be of type")
|
|
| Rebind_mismatch (lid, p, p') ->
|
|
fprintf ppf
|
|
"@[%s@ %a@ %s@ %s@ %s@ %s@ %s@]"
|
|
"The constructor" Printtyp.longident lid
|
|
"extends type" (Path.name p)
|
|
"whose declaration does not match"
|
|
"the declaration of type" (Path.name p')
|
|
| Rebind_private lid ->
|
|
fprintf ppf "@[%s@ %a@ %s@]"
|
|
"The constructor"
|
|
Printtyp.longident lid
|
|
"is private"
|
|
| Variance (Typedecl_variance.Bad_variance (n, v1, v2)) ->
|
|
let variance (p,n,i) =
|
|
let inj = if i then "injective " else "" in
|
|
match p, n with
|
|
true, true -> inj ^ "invariant"
|
|
| true, false -> inj ^ "covariant"
|
|
| false, true -> inj ^ "contravariant"
|
|
| false, false -> if inj = "" then "unrestricted" else inj
|
|
in
|
|
let suffix n =
|
|
let teen = (n mod 100)/10 = 1 in
|
|
match n mod 10 with
|
|
| 1 when not teen -> "st"
|
|
| 2 when not teen -> "nd"
|
|
| 3 when not teen -> "rd"
|
|
| _ -> "th"
|
|
in
|
|
(match n with
|
|
| Variance_not_reflected ->
|
|
fprintf ppf "@[%s@ %s@ It"
|
|
"In this definition, a type variable has a variance that"
|
|
"is not reflected by its occurrence in type parameters."
|
|
| No_variable ->
|
|
fprintf ppf "@[%s@ %s@]"
|
|
"In this definition, a type variable cannot be deduced"
|
|
"from the type parameters."
|
|
| Variance_not_deducible ->
|
|
fprintf ppf "@[%s@ %s@ It"
|
|
"In this definition, a type variable has a variance that"
|
|
"cannot be deduced from the type parameters."
|
|
| Variance_not_satisfied n ->
|
|
fprintf ppf "@[%s@ %s@ The %d%s type parameter"
|
|
"In this definition, expected parameter"
|
|
"variances are not satisfied."
|
|
n (suffix n));
|
|
(match n with
|
|
| No_variable -> ()
|
|
| _ ->
|
|
fprintf ppf " was expected to be %s,@ but it is %s.@]"
|
|
(variance v2) (variance v1))
|
|
| Unavailable_type_constructor p ->
|
|
fprintf ppf "The definition of type %a@ is unavailable" Printtyp.path p
|
|
| Bad_fixed_type r ->
|
|
fprintf ppf "This fixed type %s" r
|
|
| Variance Typedecl_variance.Varying_anonymous ->
|
|
fprintf ppf "@[%s@ %s@ %s@]"
|
|
"In this GADT definition," "the variance of some parameter"
|
|
"cannot be checked"
|
|
| Val_in_structure ->
|
|
fprintf ppf "Value declarations are only allowed in signatures"
|
|
| Multiple_native_repr_attributes ->
|
|
fprintf ppf "Too many [@@unboxed]/[@@untagged] attributes"
|
|
| Cannot_unbox_or_untag_type Unboxed ->
|
|
fprintf ppf "@[Don't know how to unbox this type.@ \
|
|
Only float, int32, int64 and nativeint can be unboxed.@]"
|
|
| Cannot_unbox_or_untag_type Untagged ->
|
|
fprintf ppf "@[Don't know how to untag this type.@ \
|
|
Only int can be untagged.@]"
|
|
| Deep_unbox_or_untag_attribute kind ->
|
|
fprintf ppf
|
|
"@[The attribute '%s' should be attached to@ \
|
|
a direct argument or result of the primitive,@ \
|
|
it should not occur deeply into its type.@]"
|
|
(match kind with Unboxed -> "@unboxed" | Untagged -> "@untagged")
|
|
| Immediacy (Typedecl_immediacy.Bad_immediacy_attribute violation) ->
|
|
fprintf ppf "@[%a@]" Format.pp_print_text
|
|
(match violation with
|
|
| Type_immediacy.Violation.Not_always_immediate ->
|
|
"Types marked with the immediate attribute must be \
|
|
non-pointer types like int or bool."
|
|
| Type_immediacy.Violation.Not_always_immediate_on_64bits ->
|
|
"Types marked with the immediate64 attribute must be \
|
|
produced using the Stdlib.Sys.Immediate64.Make functor.")
|
|
| Bad_unboxed_attribute msg ->
|
|
fprintf ppf "@[This type cannot be unboxed because@ %s.@]" msg
|
|
| Separability (Typedecl_separability.Non_separable_evar evar) ->
|
|
let pp_evar ppf = function
|
|
| None ->
|
|
fprintf ppf "an unnamed existential variable"
|
|
| Some str ->
|
|
fprintf ppf "the existential variable %a"
|
|
Pprintast.tyvar str in
|
|
fprintf ppf "@[This type cannot be unboxed because@ \
|
|
it might contain both float and non-float values,@ \
|
|
depending on the instantiation of %a.@ \
|
|
You should annotate it with [%@%@ocaml.boxed].@]"
|
|
pp_evar evar
|
|
| Boxed_and_unboxed ->
|
|
fprintf ppf "@[A type cannot be boxed and unboxed at the same time.@]"
|
|
| Nonrec_gadt ->
|
|
fprintf ppf
|
|
"@[GADT case syntax cannot be used in a 'nonrec' block.@]"
|
|
|
|
let () =
|
|
Location.register_error_of_exn
|
|
(function
|
|
| Error (loc, err) ->
|
|
Some (Location.error_of_printer ~loc report_error err)
|
|
| _ ->
|
|
None
|
|
)
|