Make webapi compatible with native compilation (with assert false and missing features!)

Makefile

@@ -56,7 +56,7 @@ setup-githooks: ## Setup githooks
 
 .PHONY: pin
 pin: ## Pin dependencies
-	@opam pin add melange "https://github.com/melange-re/melange.git#47c95b328039161142c6313843100ffb989282f5" -y
+	@opam pin add melange "https://github.com/melange-re/melange.git#6b0bdb669fdbaa959809cc8014da54c9bc1222e6" -y
 
 .PHONY: create-switch
 create-switch: ## Create opam switch

dune-project

@@ -29,6 +29,7 @@
   (ppxlib (>= 0.23.0))
   (reason (= 3.8.1))
   (pcre (>= 7.4.0))
+  (promise (>= 1.1.2))
 
   ;; Test dependencies
   (alcotest :with-test)

lib/intf_of_sign/dune

@@ -0,0 +1,7 @@
+(executable
+ (name intf_of_sign)
+ (modules intf_of_sign)
+ (libraries melange-compiler-libs compiler-libs str ppxlib)
+ (public_name intf-of-sign)
+ (preprocess
+  (pps ppxlib.metaquot)))

lib/intf_of_sign/intf_of_sign.ml

@@ -0,0 +1,242 @@
+(* https://discuss.ocaml.org/t/how-can-i-generate-mli-files-from-ml-files/5427 *)
+(* https://stackoverflow.com/questions/26821053/how-to-auto-generate-stubs-from-mli-file *)
+
+[@@@warning "-32"]
+
+module Builder = Ppxlib.Ast_builder.Default
+
+let _read_lines file = In_channel.with_open_text file In_channel.input_all
+let loc = Ppxlib.Location.none
+let loc = Ppxlib.Location.none
+
+let read_cmi sourcefile =
+  try Cmi_format.read_cmi sourcefile with
+  | Cmi_format.Error (Not_an_interface filepath) ->
+      Format.eprintf "Error: '%s' is not an interface file" filepath;
+      exit 2
+  | Cmi_format.Error (Wrong_version_interface (filepath, version)) ->
+      Format.eprintf "Error: '%s' has the wrong version: %s" filepath version;
+      exit 2
+  | Cmi_format.Error (Corrupted_interface filepath) ->
+      Format.eprintf "Error: '%s' is corrupted" filepath;
+      exit 2
+  | _ ->
+      Format.eprintf "ERROR!!!";
+      exit 2
+
+module Dummy_implementation = struct
+  let with_loc txt = Ppxlib.{ txt; loc }
+  let with_location txt = Location.{ txt; loc = Location.none }
+
+  let not_implemented msg =
+    let msg = Builder.pexp_constant ~loc (Pconst_string (msg, loc, None)) in
+    [%expr "Error: " ^ [%e msg] ^ " is not implemented"]
+
+  let of_argument _arg =
+    let name = Builder.pvar ~loc "_" in
+    [%pat? [%p name]]
+
+  let of_const value =
+    match value with
+    | "string" -> [%expr ""]
+    | "int" -> [%expr 0]
+    | "float" -> [%expr 0.0]
+    | "bool" -> [%expr false]
+    | "unit" -> [%expr ()]
+    | "char" -> [%expr 'a']
+    | "list" -> [%expr []]
+    | "array" -> [%expr [||]]
+    | "option" -> [%expr None]
+    | _ -> [%expr "???"]
+
+  let read_desc_from_type_expr (type_expr : Types.type_expr) =
+    let (type_expr : Types.transient_expr) = Obj.magic type_expr in
+    type_expr.desc
+
+  let of_value_description (description : Types.value_description) :
+      Parsetree.expression =
+    let rec of_type_desc desc =
+      match desc with
+      | Types.Tvar (Some var) -> [%expr [%e of_const var]]
+      | Tvar None -> not_implemented "???"
+      | Tarrow (arg_label, _type_expr, type_expr, _commutable) ->
+          [%expr
+            fun [%p of_argument arg_label] ->
+              [%e of_type_desc (read_desc_from_type_expr type_expr)]]
+      | Ttuple tuple ->
+          Builder.pexp_tuple ~loc
+            (List.map
+               (fun type_expr ->
+                 of_type_desc (read_desc_from_type_expr type_expr))
+               tuple)
+      | Tconstr (path, _type_exprs, _abbrev) -> of_const (Path.name path)
+      | Tobject (_type_expr, _) -> not_implemented "Tobject"
+      | Tfield (_name, _field_kind, _, _) -> not_implemented "Tfield"
+      | Tnil -> not_implemented "Tnil"
+      | Tlink _type_expr -> not_implemented "Tlink"
+      | Tsubst (_type_expr, _type_expr_sub) -> not_implemented "Tsubst"
+      | Tvariant _row_desc -> not_implemented "Tvariant"
+      | Tunivar _var -> not_implemented "Tunivar"
+      | Tpoly (_type_expr, _type_exprs) -> not_implemented "Tpoly"
+      | Tpackage (_path, _package) -> not_implemented "Tpackage"
+    in
+
+    let type_desc = read_desc_from_type_expr description.val_type in
+    of_type_desc type_desc
+
+  let rec of_module_declaration module_declaration =
+    match module_declaration with
+    | Types.Mty_signature signature ->
+        let structure_item_list = of_signature signature in
+        Builder.pmod_structure ~loc structure_item_list
+    | Mty_functor (functor_parameter, module_type) ->
+        let functor_parameter = of_function_parameter functor_parameter in
+        let module_expr = of_module_declaration module_type in
+        Builder.pmod_functor ~loc functor_parameter module_expr
+    (* TODO: Mty_alias and Mty_ident are implemented as ident, is that wrong? *)
+    | Mty_alias path | Mty_ident path ->
+        let path = Path.name path in
+        let longident = with_loc (Ppxlib.Longident.Lident path) in
+        Builder.pmod_ident ~loc longident
+
+  and of_function_parameter functor_parameter : Parsetree.functor_parameter =
+    (* and functor_parameter =
+       | Unit
+       | Named of Ident.t option * module_type *)
+    match functor_parameter with
+    | Unit -> Parsetree.Unit
+    | Named (ident, module_type) ->
+        let txt = Option.map Ident.name ident in
+        let module_type = of_module_type module_type in
+        Parsetree.Named ({ txt; loc = Location.none }, module_type)
+
+  (* open Ast_helper
+     let t_mty = Mty.signature [ t ]
+     let fn_arg = Parsetree.Named(Location.(mkloc (Some "T") none), t_mty)
+  *)
+  (* let (functor_parameter ) =
+       if type_declaration.type_params = [] then Unit
+       else
+         (* let module_type = Builder.type_declaration ~loc type_declaration in *)
+         (* let module_type = Mty_ident () in
+            Named (with_loc None, ) *)
+         Unit
+     in *)
+
+  and ident_of_path (path : Path.t) =
+    let path = Path.name path in
+    with_location (Longident.Lident path)
+
+  (* TODO: Missing *)
+  and of_module_type module_type =
+    match module_type with
+    | Types.Mty_ident path -> Ast_helper.Mty.ident (ident_of_path path)
+    | Mty_alias path -> Ast_helper.Mty.alias (ident_of_path path)
+    | Mty_signature signature ->
+        let signatures = of_signature_to_signature signature in
+        Ast_helper.Mty.signature signatures
+    | Mty_functor (functor_parameter, module_type) ->
+        Ast_helper.Mty.functor_
+          (of_functor_parameter functor_parameter)
+          (of_module_type module_type)
+
+  and of_signature_item_to_signature_item
+      (signature_item : Types.signature_item) =
+    match signature_item with
+    | Sig_value (_ident, _value_description, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_module (_ident, _module_presence, _declaration, _rec, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_type (_ident, _type_declaration, _rec_, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_typext (_ident, _extension_constructor, _ext, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_modtype (_ident, _modtype_declaration, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_class (_ident, _class_declaration, _rec, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+    | Sig_class_type (_ident, _class_type_declaration, _rec, _visibility) ->
+        Ast_helper.Sig.type_ Nonrecursive []
+
+  and of_signature_to_signature signature =
+    List.map of_signature_item_to_signature_item signature
+
+  and of_functor_parameter functor_parameter =
+    match functor_parameter with
+    | Types.Unit -> Parsetree.Unit
+    | Named (ident, module_type) ->
+        let txt = Option.map Ident.name ident in
+        let module_type = of_module_type module_type in
+        Parsetree.Named ({ txt; loc = Location.none }, module_type)
+
+  and of_type_declaration (type_declaration : Types.type_declaration) =
+    let (functor_parameter : Parsetree.functor_parameter) =
+      if type_declaration.type_params = [] then Unit
+      else
+        (* let module_type = Builder.type_declaration ~loc type_declaration in *)
+        (* let module_type = Mty_ident () in
+           Named (with_loc None, ) *)
+        Unit
+    in
+    failwith "oftd" |> ignore;
+    (* let module_expr = of_module_declaration module_type in *)
+    let longident = with_loc (Ppxlib.Longident.Lident "lolwat") in
+    let module_expr = Builder.pmod_ident ~loc longident in
+    Builder.pmod_functor ~loc functor_parameter module_expr
+
+  and of_signature_item (signature : Types.signature_item) =
+    match signature with
+    | Sig_value (ident, value_description, _visibility) ->
+        let name = Builder.pvar ~loc @@ Ident.name ident in
+        let value = of_value_description value_description in
+        [%stri let [%p name] = [%e value]]
+    | Sig_module (ident, _module_presence, declaration, _rec, _visibility) ->
+        let txt = Ident.name ident in
+        let name = with_loc (Some txt) in
+        let module_expr = of_module_declaration declaration.md_type in
+        Builder.pstr_module ~loc
+          (Builder.module_binding ~loc ~name ~expr:module_expr)
+    (* TODO: Implement nones *)
+    | Sig_type (ident, type_declaration, _rec_, _visibility) ->
+        let txt = Ident.name ident in
+        let name = with_loc (Some txt) in
+        let (type_declaration : Parsetree.type_declaration) =
+          Obj.magic type_declaration
+        in
+        let t = Ast_helper.Sig.type_ Nonrecursive [ type_declaration ] in
+        let t_mty = Ast_helper.Mty.signature [ t ] in
+        let _parameter =
+          Parsetree.Named ({ txt = Some "T"; loc = Location.none }, t_mty)
+        in
+        let expr = Ast_helper.Mod.structure [] in
+        let binding = Builder.module_binding ~loc ~name ~expr in
+        Builder.pstr_module ~loc binding
+    | Sig_typext (_ident, _extension_constructor, _ext, _visibility) ->
+        failwith "Sig_typext" |> ignore;
+        [%stri let not_implemented = "Sig_typext"]
+    | Sig_modtype (_ident, _modtype_declaration, _visibility) ->
+        failwith "Sig_modtype" |> ignore;
+        [%stri let not_implemented = "Sig_modtype"]
+    | Sig_class (_ident, _class_declaration, _rec, _visibility) ->
+        failwith "Sig_class" |> ignore;
+        [%stri let not_implemented = "Sig_class"]
+    | Sig_class_type (_ident, _class_type_declaration, _rec, _visibility) ->
+        failwith "Sig_class_type" |> ignore;
+        [%stri let not_implemented = "Sig_class_type"]
+
+  and of_signature (signatures : Types.signature) =
+    signatures |> List.map of_signature_item
+end
+
+let () =
+  let sourcefile =
+    "./_build/default/lib/webapi/.webapi_melange.objs/melange/webapi_melange__Webapi__Basa64.cmi"
+  in
+  let cmi = read_cmi sourcefile in
+  let signature = cmi.cmi_sign in
+  Format.pp_print_newline Format.std_formatter ();
+  Printtyp.signature Format.std_formatter signature;
+  Format.printf "\n\nimplementation\n================\n";
+  let implementation = Dummy_implementation.of_signature signature in
+  Pprintast.structure Format.std_formatter implementation;
+  Format.pp_print_newline Format.std_formatter ()

lib/js/dune

@@ -3,7 +3,7 @@
  (modules js)
  (public_name server-reason-react.js)
  (flags :standard -w -49)
- (libraries pcre)
+ (libraries pcre promise)
  (preprocess
   (pps melange.ppx)))
 

lib/js/js.ml

@@ -2383,9 +2383,7 @@ If [n] is greater than the length of [str], then [sliceToEnd] returns the empty
   *)
 end
 
-module Promise = struct
-  (** Provide bindings to JS promise *)
-end
+module Promise = Promise
 
 module Date = struct
   (** Provide bindings for JS Date *)

lib/react/react.ml

@@ -1,8 +1,12 @@
 type domRef
 
+module Dom = struct
+  type element
+end
+
 module Ref = struct
   type t = domRef
-  type currentDomRef = Webapi.Dom.element Js.nullable ref
+  type currentDomRef = Dom.element Js.nullable ref
   type callbackDomRef
 
   external domRef : currentDomRef -> domRef = "%identity"

lib/react/react.mli

@@ -1,8 +1,12 @@
 type domRef
 
+module Dom : sig
+  type element
+end
+
 module Ref : sig
   type t = domRef
-  type currentDomRef = Webapi.Dom.element Js.nullable ref
+  type currentDomRef = Dom.element Js.nullable ref
   type callbackDomRef
 
   external domRef : currentDomRef -> domRef = "%identity"