fix(compiler): Align return types of ErrImp<E> and OkImpl<T> with…

… `Result<T, E>` for TS 5.5 (#30345)
facebook · Jul 16, 2024 · 6c0386e · 6c0386e
1 parent 270222b
commit 6c0386e
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/compiler/packages/babel-plugin-react-compiler/src/Utils/Result.ts b/compiler/packages/babel-plugin-react-compiler/src/Utils/Result.ts
@@ -124,11 +124,11 @@ class OkImpl<T> implements Result<T, never> {
     return this;
   }
 
-  isOk(): boolean {
+  isOk(): this is OkImpl<T> {
     return true;
   }
 
-  isErr(): boolean {
+  isErr(): this is ErrImpl<never> {
     return false;
   }
 
@@ -199,11 +199,11 @@ class ErrImpl<E> implements Result<never, E> {
     return fn(this.val);
   }
 
-  isOk(): boolean {
+  isOk(): this is OkImpl<never> {
     return false;
   }
 
-  isErr(): boolean {
+  isErr(): this is ErrImpl<E> {
     return true;
   }