From 779cf10329880c229e13e0946d372b3cbd4f1883 Mon Sep 17 00:00:00 2001
From: Simon Brand <tartanllama@gmail.com>
Date: Mon, 28 May 2018 21:46:58 +0100
Subject: [PATCH] Qualify call to detail::invoke so that std::invoke isn't
 picked up due to ADL in C++17

---
 tl/optional.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tl/optional.hpp b/tl/optional.hpp
index b1d26a6..cdebc24 100644
--- a/tl/optional.hpp
+++ b/tl/optional.hpp
@@ -133,9 +133,9 @@ template <class F, class, class... Us> struct invoke_result_impl;
 
 template <class F, class... Us>
 struct invoke_result_impl<
-    F, decltype(invoke(std::declval<F>(), std::declval<Us>()...), void()),
+    F, decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...), void()),
     Us...> {
-  using type = decltype(invoke(std::declval<F>(), std::declval<Us>()...));
+  using type = decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...));
 };
 
 template <class F, class... Us>