Clean up Result and Option modules

Author: DZakh

src/Core__Option.mjs

@@ -4,17 +4,15 @@ import * as Curry from "rescript/lib/es6/curry.js";
 import * as Caml_option from "rescript/lib/es6/caml_option.js";
 
 function filter(opt, p) {
-  var p$1 = Curry.__1(p);
-  if (opt !== undefined && p$1(Caml_option.valFromOption(opt))) {
+  if (opt !== undefined && Curry._1(p, Caml_option.valFromOption(opt))) {
     return opt;
   }
 
 }
 
 function forEach(opt, f) {
-  var f$1 = Curry.__1(f);
   if (opt !== undefined) {
-    return f$1(Caml_option.valFromOption(opt));
+    return Curry._1(f, Caml_option.valFromOption(opt));
   }
 
 }
@@ -30,26 +28,23 @@ function getExn(x) {
 }
 
 function mapOr(opt, $$default, f) {
-  var f$1 = Curry.__1(f);
   if (opt !== undefined) {
-    return f$1(Caml_option.valFromOption(opt));
+    return Curry._1(f, Caml_option.valFromOption(opt));
   } else {
     return $$default;
   }
 }
 
 function map(opt, f) {
-  var f$1 = Curry.__1(f);
   if (opt !== undefined) {
-    return Caml_option.some(f$1(Caml_option.valFromOption(opt)));
+    return Caml_option.some(Curry._1(f, Caml_option.valFromOption(opt)));
   }
 
 }
 
 function flatMap(opt, f) {
-  var f$1 = Curry.__1(f);
   if (opt !== undefined) {
-    return f$1(Caml_option.valFromOption(opt));
+    return Curry._1(f, Caml_option.valFromOption(opt));
   }
 
 }

src/Core__Option.res

@@ -22,22 +22,18 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
 
-let filterU = (opt, p) =>
+let filter = (opt, p) =>
   switch opt {
-  | Some(x) as some if p(. x) => some
+  | Some(x) as option if p(x) => option
   | _ => None
   }
 
-let filter = (opt, p) => filterU(opt, (. x) => p(x))
-
-let forEachU = (opt, f) =>
+let forEach = (opt, f) =>
   switch opt {
-  | Some(x) => f(. x)
+  | Some(x) => f(x)
   | None => ()
   }
 
-let forEach = (opt, f) => forEachU(opt, (. x) => f(x))
-
 let getExn = x =>
   switch x {
   | Some(x) => x
@@ -46,32 +42,26 @@ let getExn = x =>
 
 external getUnsafe: option<'a> => 'a = "%identity"
 
-let mapOrU = (opt, default, f) =>
+let mapOr = (opt, default, f) =>
   switch opt {
-  | Some(x) => f(. x)
+  | Some(x) => f(x)
   | None => default
   }
 
-let mapOr = (opt, default, f) => mapOrU(opt, default, (. x) => f(x))
-
 let mapWithDefault = mapOr
 
-let mapU = (opt, f) =>
+let map = (opt, f) =>
   switch opt {
-  | Some(x) => Some(f(. x))
+  | Some(x) => Some(f(x))
   | None => None
   }
 
-let map = (opt, f) => mapU(opt, (. x) => f(x))
-
-let flatMapU = (opt, f) =>
+let flatMap = (opt, f) =>
   switch opt {
-  | Some(x) => f(. x)
+  | Some(x) => f(x)
   | None => None
   }
 
-let flatMap = (opt, f) => flatMapU(opt, (. x) => f(x))
-
 let getOr = (opt, default) =>
   switch opt {
   | Some(x) => x

src/Core__Result.mjs

@@ -13,38 +13,29 @@ function getExn(x) {
 }
 
 function mapOr(opt, $$default, f) {
-  var f$1 = Curry.__1(f);
   if (opt.TAG === /* Ok */0) {
-    return f$1(opt._0);
+    return Curry._1(f, opt._0);
   } else {
     return $$default;
   }
 }
 
 function map(opt, f) {
-  var f$1 = Curry.__1(f);
   if (opt.TAG === /* Ok */0) {
     return {
             TAG: /* Ok */0,
-            _0: f$1(opt._0)
+            _0: Curry._1(f, opt._0)
           };
   } else {
-    return {
-            TAG: /* Error */1,
-            _0: opt._0
-          };
+    return opt;
   }
 }
 
 function flatMap(opt, f) {
-  var f$1 = Curry.__1(f);
   if (opt.TAG === /* Ok */0) {
-    return f$1(opt._0);
+    return Curry._1(f, opt._0);
   } else {
-    return {
-            TAG: /* Error */1,
-            _0: opt._0
-          };
+    return opt;
   }
 }
 

src/Core__Result.res

@@ -30,32 +30,26 @@ let getExn = x =>
   | Error(_) => raise(Not_found)
   }
 
-let mapOrU = (opt, default, f) =>
+let mapOr = (opt, default, f) =>
   switch opt {
-  | Ok(x) => f(. x)
+  | Ok(x) => f(x)
   | Error(_) => default
   }
 
-let mapOr = (opt, default, f) => mapOrU(opt, default, (. x) => f(x))
-
 let mapWithDefault = mapOr
 
-let mapU = (opt, f) =>
+let map = (opt, f) =>
   switch opt {
-  | Ok(x) => Ok(f(. x))
-  | Error(y) => Error(y)
+  | Ok(x) => Ok(f(x))
+  | Error(_) as result => result
   }
 
-let map = (opt, f) => mapU(opt, (. x) => f(x))
-
-let flatMapU = (opt, f) =>
+let flatMap = (opt, f) =>
   switch opt {
-  | Ok(x) => f(. x)
-  | Error(y) => Error(y)
+  | Ok(x) => f(x)
+  | Error(_) as result => result
   }
 
-let flatMap = (opt, f) => flatMapU(opt, (. x) => f(x))
-
 let getOr = (opt, default) =>
   switch opt {
   | Ok(x) => x
@@ -98,14 +92,8 @@ let forEach = (r, f) =>
   | Error(_) => ()
   }
 
-// If the source result is Ok, should we return that instance, or
-// create it again? In this implementation I'm returning that specific
-// instance. However this is not consistent with the implementation for
-// other functions like mapU and flatMapU, which recreate the result.
-// This is more efficient. I'm not sure why the other implementations
-// return a new instance.
 let mapError = (r, f) =>
   switch r {
-  | Ok(_) as ok => ok
+  | Ok(_) as result => result
   | Error(e) => Error(f(e))
   }