Remove Undefined module

CHANGELOG.md

@@ -12,6 +12,7 @@
 - Fixed type signatures of `Array.fromArrayLikeWithMap` and `Array.fromIteratorWithMap`. https://github.com/rescript-association/rescript-core/pull/50
 - Remove internal async/await helpers that do not need to be exposed in `Core`.
 - Add locale and formatting options to `localeDateString`, `localeString` and `localTimeString` functions https://github.com/rescript-association/rescript-core/pull/30
+- Remove `Undefined` module. `Nullable` or `option` directly (where appropriate) can be used instead. https://github.com/rescript-association/rescript-core/pull/59
 - Change `RegExp.source` to return a `string`. Was previously returning a `bool`, which is wrong. https://github.com/rescript-association/rescript-core/pull/47
 - Remove `Date.valueOf` as it returns the same as `Date.getTime`. https://github.com/rescript-association/rescript-core/pull/61
 

src/RescriptCore.mjs

@@ -33,8 +33,6 @@ var $$RegExp;
 
 var $$String;
 
-var Undefined;
-
 var $$Symbol;
 
 var Type;
@@ -112,7 +110,6 @@ export {
   $$Promise ,
   $$RegExp ,
   $$String ,
-  Undefined ,
   $$Symbol ,
   Type ,
   $$JSON ,

src/RescriptCore.res

@@ -16,7 +16,6 @@ module Object = Core__Object
 module Promise = Core__Promise
 module RegExp = Core__RegExp
 module String = Core__String
-module Undefined = Core__Undefined
 module Symbol = Core__Symbol
 module Type = Core__Type
 module JSON = Core__JSON
@@ -49,7 +48,7 @@ module Intl = Core__Intl
 @val external globalThis: {..} = "globalThis"
 
 external null: Core__Null.t<'a> = "#null"
-external undefined: Core__Undefined.t<'a> = "#undefined"
+external undefined: Core__Nullable.t<'a> = "#undefined"
 external typeof: 'a => Core__Type.t = "#typeof"
 
 type t<'a> = Js.t<'a>

test/TempTests.mjs

@@ -8,7 +8,6 @@ import * as Core__Array from "../src/Core__Array.mjs";
 import * as Core__Float from "../src/Core__Float.mjs";
 import * as Core__BigInt from "../src/Core__BigInt.mjs";
 import * as Core__Option from "../src/Core__Option.mjs";
-import * as Core__Undefined from "../src/Core__Undefined.mjs";
 
 console.info("");
 
@@ -311,8 +310,6 @@ var resolvedOptions = new Intl.DateTimeFormat().resolvedOptions();
 
 var timeZone = resolvedOptions.timeZone;
 
-var x$1 = Core__Undefined.fromOption(1);
-
 var z = 1.2 % 1.4;
 
 var intFromBigInt = Core__BigInt.toInt(BigInt("10000000000"));
@@ -350,11 +347,11 @@ export {
   result$1 as result,
   set ,
   regexp ,
+  x ,
   array$1 as array,
   timeout ,
   resolvedOptions ,
   timeZone ,
-  x$1 as x,
   z ,
   intFromBigInt ,
   Bugfix ,

test/TempTests.res

@@ -194,8 +194,6 @@ if globalThis["hello"] !== undefined {
 let resolvedOptions = Intl.DateTimeFormat.make()->Intl.DateTimeFormat.resolvedOptions
 let timeZone = resolvedOptions["timeZone"]
 
-let x = Some(1)->Undefined.fromOption
-
 let z = Float.mod(1.2, 1.4)
 
 let intFromBigInt = BigInt.fromString("10000000000")->BigInt.toInt