From ce416566727ab4078b46dd0013c384a0a6505613 Mon Sep 17 00:00:00 2001
From: Jan Niklas Hasse <jhasse@bixense.com>
Date: Fri, 18 Jan 2019 10:50:55 +0100
Subject: [PATCH] Use C++14 feature: decltype(auto)

See https://github.com/progschj/ThreadPool/pull/57
---
 ThreadPool.hpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/ThreadPool.hpp b/ThreadPool.hpp
index 95773dc..3f34f02 100644
--- a/ThreadPool.hpp
+++ b/ThreadPool.hpp
@@ -9,8 +9,7 @@ class ThreadPool {
 public:
     explicit ThreadPool(size_t);
     template<class F, class... Args>
-    auto enqueue(F&& f, Args&&... args)
-        -> std::future<std::invoke_result_t<F, Args...>>;
+    decltype(auto) enqueue(F&& f, Args&&... args);
     ~ThreadPool();
 private:
     // need to keep track of threads so we can join them
@@ -54,8 +53,7 @@ inline ThreadPool::ThreadPool(size_t threads)
 
 // add new work item to the pool
 template<class F, class... Args>
-auto ThreadPool::enqueue(F&& f, Args&&... args)
-    -> std::future<std::invoke_result_t<F, Args...>>
+decltype(auto) ThreadPool::enqueue(F&& f, Args&&... args)
 {
     using return_type = std::invoke_result_t<F, Args...>;