Initial commit

lune/pkg/result.luau

@@ -0,0 +1,24 @@
+--!strict
+export type Identity<T> = {
+    ok: true,
+    val: T,
+} | {
+    ok: false,
+    err: string,
+}
+
+local function construct<T>(ok: boolean, value: T & string): Identity<T>
+    if ok then
+        return {
+            ok = true,
+            val = value,
+        }
+    else
+        return {
+            ok = false,
+            err = value,
+        }
+    end
+end
+
+return (construct :: any) :: (<T>(ok: true, value: T) -> Identity<T>) & (<T>(ok: false, value: string) -> Identity<T>)