Fix not properly handling function types as arguments.

src/passes/1-parser/reasonligo/Parser.mly

@@ -430,7 +430,18 @@ type_expr_simple:
     TProd {region = cover $1 $3; value=$2}
   }
 | "(" type_expr_simple "=>" type_expr_simple ")" {
-    TFun {region = cover $1 $5; value=$2,$3,$4} }
+    TPar { 
+      value = {
+        lpar = $1;
+        rpar = $5;
+        inside = TFun {
+          region = cover (type_expr_to_region $2) (type_expr_to_region $4);
+          value=$2,$3,$4
+        } 
+      };
+      region = cover $1 $5;
+    }
+}
 
 type_annotation_simple:
   ":" type_expr_simple { $1,$2 }

src/passes/1-parser/reasonligo/Pretty.ml

@@ -50,11 +50,8 @@ and pp_let_binding let_ (binding : let_binding) =
       | Some (_,e) ->
           patterns ^^ group (break 0 ^^ string ": " ^^ pp_type_expr e ^^ string " = ")
   in
-  match let_rhs with
-  (* | EFun { } -> *)
-  | e ->  
-    let rhs = pp_expr e
-    in prefix 2 0 lhs rhs
+  let rhs = pp_expr let_rhs
+  in prefix 2 0 lhs rhs
 
 and pp_pattern = function
   PConstr p -> pp_pconstr p
@@ -403,7 +400,7 @@ and pp_seq {value; _} =
 
 and pp_type_expr = function
   TProd t   -> pp_cartesian t
-| TSum t    -> pp_variants t
+| TSum t    -> break 0 ^^ pp_variants t
 | TRecord t -> pp_fields t
 | TApp t    -> pp_type_app t
 | TFun t    -> pp_fun_type t

src/test/contracts/expected/high-order.religo

@@ -3,12 +3,12 @@ let foobar =
     {
       let foo: int => int = (i: int) => i;
       let bar: ((int => int) => int) = 
-        (f: int => int) => f(i);
+        (f: (int => int)) => f(i);
       bar(foo)
     };
 
 let higher2 = 
-  (i: int, f: int => int): int => 
+  (i: int, f: (int => int)): int => 
     {
       let ii: int = f(i);
       ii
@@ -37,7 +37,7 @@ let g = (i: int): int => f(i);
 let foobar4 = (i: int): int => g(g(i));
 
 let higher3 = 
-  (i: int, f: int => int, g: int => int): int => 
+  (i: int, f: (int => int), g: (int => int)): int => 
     {
       let ii: int = f(g(i));
       ii

src/test/contracts/expected/lambda2.religo

@@ -2,4 +2,4 @@ type storage = unit;
 
 let main = 
   ((a, s): (unit, storage)): unit => 
-    ((f: unit => unit) => f(()))((useless: unit) => unit);
+    ((f: (unit => unit)) => f(()))((useless: unit) => unit);

src/test/contracts/expected/pledge.religo

@@ -1,6 +1,7 @@
 type storage = address;
 
-type parameter =   Donate(unit)
+type parameter = 
+  Donate(unit)
 | Distribute((unit => list(operation)));
 
 let donate = 
@@ -10,7 +11,7 @@ let donate =
     };
 
 let distribute = 
-  ((p, s): (unit => list(operation), storage))
+  ((p, s): ((unit => list(operation)), storage))
   :
     (list(operation), storage) => 
     {