From 3974935bdbaf82fbc3745b01b4e150ac38517d09 Mon Sep 17 00:00:00 2001
From: Simon Brand <tartanllama@gmail.com>
Date: Thu, 26 Oct 2017 21:10:09 +0100
Subject: [PATCH] Enable if

---
 expected.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/expected.hpp b/expected.hpp
index 72b3895..84119df 100644
--- a/expected.hpp
+++ b/expected.hpp
@@ -17,6 +17,11 @@
 #include <type_traits>
 
 namespace tl {
+    namespace detail {
+template <bool E, class T = void>
+using enable_if_t = typename std::enable_if<E, T>::type;
+    }
+
     template <class E>
     class unexpected {
     public: