From 38beae6b2f2dc01f06f7e6efa1a28aec57514cf4 Mon Sep 17 00:00:00 2001
From: Simon Brand <simon@codeplay.com>
Date: Wed, 22 Aug 2018 14:09:35 +0100
Subject: [PATCH] Fix map_error for C++11 with different types

---
 tl/expected.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tl/expected.hpp b/tl/expected.hpp
index 47ceb8a..e00a248 100644
--- a/tl/expected.hpp
+++ b/tl/expected.hpp
@@ -2016,7 +2016,7 @@ template <class Exp, class F,
           detail::enable_if_t<!std::is_void<Ret>::value> * = nullptr>
 constexpr auto map_error_impl(Exp &&exp, F &&f)
     -> expected<exp_t<Exp>, detail::decay_t<Ret>> {
-  using result = ret_t<Exp, detail::decay_t<Ret>>;
+  using result = expected<exp_t<Exp>, detail::decay_t<Ret>>;
 
   return exp.has_value()
              ? result(*std::forward<Exp>(exp))