Remove unnecessary usage of Ast_uncurried helpers

CHANGELOG.md

@@ -32,6 +32,8 @@
 
 #### :house: Internal
 
+- Clean up usage of `Ast_uncurried` helpers. https://github.com/rescript-lang/rescript/pull/7987
+
 # 12.0.0-rc.2
 
 #### :boom: Breaking Change

compiler/frontend/ast_derive_js_mapper.ml

@@ -174,10 +174,9 @@ let init () =
               in
               let to_js_body body =
                 Ast_comb.single_non_rec_value pat_to_js
-                  (Ast_uncurried.uncurried_fun ~arity:1
-                     (Ast_compatible.fun_ ~arity:None
-                        (Pat.constraint_ (Pat.var pat_param) core_type)
-                        body))
+                  (Ast_compatible.fun_ ~arity:(Some 1)
+                     (Pat.constraint_ (Pat.var pat_param) core_type)
+                     body)
               in
               let ( +> ) a ty = Exp.constraint_ (erase_type a) ty in
               let ( +: ) a ty = erase_type (Exp.constraint_ a ty) in
@@ -227,16 +226,12 @@ let init () =
                 in
                 let from_js =
                   Ast_comb.single_non_rec_value pat_from_js
-                    (Ast_uncurried.uncurried_fun ~arity:1
-                       (Ast_compatible.fun_ ~arity:(Some 1) (Pat.var pat_param)
-                          (if create_type then
-                             Exp.let_ Nonrecursive
-                               [
-                                 Vb.mk (Pat.var pat_param)
-                                   (exp_param +: new_type);
-                               ]
-                               (Exp.constraint_ obj_exp core_type)
-                           else Exp.constraint_ obj_exp core_type)))
+                    (Ast_compatible.fun_ ~arity:(Some 1) (Pat.var pat_param)
+                       (if create_type then
+                          Exp.let_ Nonrecursive
+                            [Vb.mk (Pat.var pat_param) (exp_param +: new_type)]
+                            (Exp.constraint_ obj_exp core_type)
+                        else Exp.constraint_ obj_exp core_type))
                 in
                 let rest = [to_js; from_js] in
                 if create_type then erase_type_str :: new_type_str :: rest
@@ -273,14 +268,12 @@ let init () =
                            app2 unsafe_index_get_exp exp_map exp_param
                          else app1 erase_type_exp exp_param);
                       Ast_comb.single_non_rec_value pat_from_js
-                        (Ast_uncurried.uncurried_fun ~arity:1
-                           (Ast_compatible.fun_ ~arity:(Some 1)
-                              (Pat.var pat_param)
-                              (let result =
-                                 app2 unsafe_index_get_exp rev_exp_map exp_param
-                               in
-                               if create_type then raise_when_not_found result
-                               else result)));
+                        (Ast_compatible.fun_ ~arity:(Some 1) (Pat.var pat_param)
+                           (let result =
+                              app2 unsafe_index_get_exp rev_exp_map exp_param
+                            in
+                            if create_type then raise_when_not_found result
+                            else result));
                     ]
                   in
                   if create_type then new_type_str :: v else v

compiler/frontend/ast_derive_projector.ml

@@ -46,13 +46,12 @@ let init () =
                   ->
                     let txt = "param" in
                     Ast_comb.single_non_rec_value ?attrs:gentype_attrs pld_name
+                      (* arity will always be 1 since these are single param functions *)
                       (Ast_compatible.fun_ ~arity:(Some 1)
                          (Pat.constraint_ (Pat.var {txt; loc}) core_type)
                          (Exp.field
                             (Exp.ident {txt = Lident txt; loc})
-                            {txt = Longident.Lident pld_label; loc})
-                      (*arity will alwys be 1 since these are single param functions*)
-                      |> handle_uncurried_accessor_tranform ~arity:1))
+                            {txt = Longident.Lident pld_label; loc})))
               | Ptype_variant constructor_declarations ->
                 Ext_list.map constructor_declarations
                   (fun

compiler/frontend/ast_exp_handle_external.ml

@@ -134,13 +134,7 @@ let handle_ffi ~loc ~payload =
         Ast_helper.Typ.arrows ~loc args any
       in
       match !is_function with
-      | Some arity ->
-        let type_ =
-          Ast_uncurried.uncurried_type
-            ~arity:(if arity = 0 then 1 else arity)
-            (arrow ~arity)
-        in
-        Ast_helper.Exp.constraint_ ~loc e type_
+      | Some arity -> Ast_helper.Exp.constraint_ ~loc e (arrow ~arity)
       | _ -> err ()
     in
     wrap_type_constraint

compiler/syntax/src/jsx_v4.ml

@@ -628,7 +628,8 @@ let map_binding ~config ~empty_loc ~pstr_loc ~file_name ~rec_flag binding =
       (* let make = React.forwardRef({
            let \"App" = (props, ref) => make({...props, ref: @optional (Js.Nullabel.toOption(ref))})
          })*)
-      Exp.fun_ ~arity:None Nolabel None
+      let total_arity = if has_forward_ref then 2 else 1 in
+      Exp.fun_ ~arity:(Some total_arity) Nolabel None
         (match core_type_of_attr with
         | None -> make_props_pattern named_type_list
         | Some _ -> make_props_pattern typ_vars_of_core_type)
@@ -639,10 +640,6 @@ let map_binding ~config ~empty_loc ~pstr_loc ~file_name ~rec_flag binding =
          else inner_expression)
         ~attrs:binding.pvb_expr.pexp_attributes
     in
-    let full_expression =
-      full_expression
-      |> Ast_uncurried.uncurried_fun ~arity:(if has_forward_ref then 2 else 1)
-    in
     let full_expression =
       match full_module_name with
       | "" -> full_expression
@@ -764,7 +761,8 @@ let map_binding ~config ~empty_loc ~pstr_loc ~file_name ~rec_flag binding =
     in
     let expression =
       (* Shape internal implementation to match wrapper: uncurried when using forwardRef. *)
-      Exp.fun_ ~arity:(Some 1) ~async:is_async Nolabel None
+      let total_arity = if has_forward_ref then 2 else 1 in
+      Exp.fun_ ~arity:(Some total_arity) ~async:is_async Nolabel None
         (Pat.constraint_ record_pattern
            (Typ.constr ~loc:empty_loc
               {txt = Lident "props"; loc = empty_loc}
@@ -779,10 +777,6 @@ let map_binding ~config ~empty_loc ~pstr_loc ~file_name ~rec_flag binding =
                 | _ -> [Typ.any ()]))))
         expression
     in
-    let expression =
-      if has_forward_ref then expression |> Ast_uncurried.uncurried_fun ~arity:2
-      else expression
-    in
     let expression =
       (* Add new tupes (type a,b,c) to make's definition *)
       newtypes
@@ -887,12 +881,9 @@ let map_binding ~config ~empty_loc ~pstr_loc ~file_name ~rec_flag binding =
       in
       let applied_expression = constrain_jsx_return applied_expression in
       let wrapper_expr =
-        Exp.fun_ ~arity:None Nolabel None props_pattern
+        Exp.fun_ ~arity:(Some 1) Nolabel None props_pattern
           ~attrs:binding.pvb_expr.pexp_attributes applied_expression
       in
-
-      let wrapper_expr = Ast_uncurried.uncurried_fun ~arity:1 wrapper_expr in
-
       let internal_expression =
         Exp.let_ Nonrecursive
           [Vb.mk (Pat.var {txt = full_module_name; loc}) wrapper_expr]

compiler/syntax/src/res_core.ml

@@ -609,10 +609,7 @@ let process_underscore_application args =
           (Ppat_var (Location.mkloc hidden_var loc))
           ~loc:Location.none
       in
-      let fun_expr =
-        Ast_helper.Exp.fun_ ~loc ~arity:(Some 1) Nolabel None pattern exp_apply
-      in
-      Ast_uncurried.uncurried_fun ~arity:1 fun_expr
+      Ast_helper.Exp.fun_ ~loc ~arity:(Some 1) Nolabel None pattern exp_apply
     | None -> exp_apply
   in
   (args, wrap)

compiler/syntax/src/res_parsetree_viewer.ml

@@ -567,7 +567,7 @@ let partition_doc_comment_attributes attrs =
 let is_fun_newtype expr =
   match expr.pexp_desc with
   | Pexp_fun _ | Pexp_newtype _ -> true
-  | _ -> Ast_uncurried.expr_is_uncurried_fun expr
+  | _ -> false
 
 let requires_special_callback_printing_last_arg args =
   let rec loop args =