From c58ec94e2d07c5d636c1db4a610588f9aceb3953 Mon Sep 17 00:00:00 2001
From: Lynix <lynix680@gmail.com>
Date: Thu, 27 Oct 2016 10:48:02 +0200
Subject: [PATCH] Core/Algorithm: Fix return type of Apply()

---
 include/Nazara/Core/Algorithm.hpp | 4 ++--
 include/Nazara/Core/Algorithm.inl | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/Nazara/Core/Algorithm.hpp b/include/Nazara/Core/Algorithm.hpp
index be25f4773..5bb461f26 100644
--- a/include/Nazara/Core/Algorithm.hpp
+++ b/include/Nazara/Core/Algorithm.hpp
@@ -20,8 +20,8 @@ namespace Nz
 	class AbstractHash;
 	class ByteArray;
 
-	template<typename F, typename Tuple> auto Apply(F&& fn, Tuple&& t);
-	template<typename O, typename F, typename Tuple> auto Apply(O& object, F&& fn, Tuple&& t);
+	template<typename F, typename Tuple> decltype(auto) Apply(F&& fn, Tuple&& t);
+	template<typename O, typename F, typename Tuple> decltype(auto) Apply(O& object, F&& fn, Tuple&& t);
 	template<typename T> ByteArray ComputeHash(HashType hash, const T& v);
 	template<typename T> ByteArray ComputeHash(AbstractHash* hash, const T& v);
 	template<typename T, std::size_t N> constexpr std::size_t CountOf(T(&name)[N]) noexcept;
diff --git a/include/Nazara/Core/Algorithm.inl b/include/Nazara/Core/Algorithm.inl
index 15827144d..b02924446 100644
--- a/include/Nazara/Core/Algorithm.inl
+++ b/include/Nazara/Core/Algorithm.inl
@@ -19,13 +19,13 @@ namespace Nz
 	{
 		// http://www.cppsamples.com/common-tasks/apply-tuple-to-function.html
 		template<typename F, typename Tuple, size_t... S>
-		auto ApplyImplFunc(F&& fn, Tuple&& t, std::index_sequence<S...>)
+		decltype(auto) ApplyImplFunc(F&& fn, Tuple&& t, std::index_sequence<S...>)
 		{
 			return std::forward<F>(fn)(std::get<S>(std::forward<Tuple>(t))...);
 		}
 
 		template<typename O, typename F, typename Tuple, size_t... S>
-		auto ApplyImplMethod(O& object, F&& fn, Tuple&& t, std::index_sequence<S...>)
+		decltype(auto) ApplyImplMethod(O& object, F&& fn, Tuple&& t, std::index_sequence<S...>)
 		{
 			return (object .* std::forward<F>(fn))(std::get<S>(std::forward<Tuple>(t))...);
 		}
@@ -44,7 +44,7 @@ namespace Nz
 	* \see Apply
 	*/
 	template<typename F, typename Tuple>
-	auto Apply(F&& fn, Tuple&& t)
+	decltype(auto) Apply(F&& fn, Tuple&& t)
 	{
 		constexpr std::size_t tSize = std::tuple_size<typename std::remove_reference<Tuple>::type>::value;
 
@@ -63,7 +63,7 @@ namespace Nz
 	* \see Apply
 	*/
 	template<typename O, typename F, typename Tuple>
-	auto Apply(O& object, F&& fn, Tuple&& t)
+	decltype(auto) Apply(O& object, F&& fn, Tuple&& t)
 	{
 		constexpr std::size_t tSize = std::tuple_size<typename std::remove_reference<Tuple>::type>::value;