From da1f12b81b39ea3d5b552ef1dbd16c2188f6e175 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Alexandre=20Boissonneault?=
 <kaboissonneault@gmail.com>
Date: Sun, 3 Dec 2017 22:11:12 -0500
Subject: [PATCH] Fixed missing decay in make_unexpected (ex: const lvalue
 expressions would create unexpected<T const&>, which would not compile)

---
 expected.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/expected.hpp b/expected.hpp
index c9fe9a6..2a3442d 100644
--- a/expected.hpp
+++ b/expected.hpp
@@ -158,8 +158,8 @@ constexpr bool operator>=(const unexpected<E> &lhs, const unexpected<E> &rhs) {
 /// *Example:*
 /// auto e1 = tl::make_unexpected(42);
 /// unexpected<int> e2 (42); //same semantics
-template <class E> unexpected<E> make_unexpected(E &&e) {
-  return unexpected<E>(std::forward<E>(e));
+template <class E> unexpected<typename std::decay<E>::type> make_unexpected(E &&e) {
+  return unexpected<typename std::decay<E>::type>(std::forward<E>(e));
 }
 
 /// \brief A tag type to tell expected to construct the unexpected value