From 9e220eca4545982df83ffcaa66a9b050a3d6f24e Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <me@liz.coffee>
Date: Sun, 20 Jul 2025 16:03:44 -0700
Subject: Fixes silent failures

---
 u/types/fn/either.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'u')

diff --git a/u/types/fn/either.ts b/u/types/fn/either.ts
index 80f32b4..5e2dca0 100644
--- a/u/types/fn/either.ts
+++ b/u/types/fn/either.ts
@@ -26,7 +26,7 @@ export interface IEither<E, T> extends Tagged<IEitherTag> {
 
     readonly moveRight: <_T>(t: _T) => IEither<E, _T>;
     readonly fold: <_T>(leftFolder: Mapper<E, _T>, rightFolder: Mapper<T, _T>) => _T;
-    readonly joinRight: <O, _T>(other: IEither<E, O>, mapper: BiMapper<O, T, _T>) => IEither<E, _T>;
+    readonly joinRight: <O, _T>(other: IEither<E, O>, mapper: (a: O, b: T) => _T) => IEither<E, _T>;
     readonly joinRightAsync: <O, _T>(
         other: Supplier<Promise<IEither<E, O>>> | Promise<IEither<E, O>>,
         mapper: BiMapper<O, T, _T>,
-- 
cgit v1.2.3-70-g09d2