From d8012e1678e1706a560e0d73073aace9d7b090c7 Mon Sep 17 00:00:00 2001
From: Peter Thoman <petert@dps.uibk.ac.at>
Date: Tue, 26 Jul 2022 10:23:52 +0200
Subject: [PATCH] Enable multi_future::get for void multi futures

---
 BS_thread_pool.hpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/BS_thread_pool.hpp b/BS_thread_pool.hpp
index 629e9d6..810d304 100644
--- a/BS_thread_pool.hpp
+++ b/BS_thread_pool.hpp
@@ -49,11 +49,12 @@ class [[nodiscard]] multi_future
     multi_future(const size_t num_futures_ = 0) : f(num_futures_) {}
 
     /**
-     * @brief Get the results from all the futures stored in this multi_future object.
+     * @brief Get the results from all the futures stored in this multi_future object, re-throwing any stored exceptions.
      *
      * @return A vector containing the results.
      */
-    [[nodiscard]] std::vector<T> get()
+    template<typename V = T>
+    [[nodiscard]] std::enable_if_t<!std::is_same_v<void, V>, std::vector<T>> get()
     {
         std::vector<T> results(f.size());
         for (size_t i = 0; i < f.size(); ++i)
@@ -61,6 +62,16 @@ class [[nodiscard]] multi_future
         return results;
     }
 
+    /**
+     * @brief Get the results from all the void futures stored in this multi_future object, re-throwing any stored exceptions.
+     */
+    template<typename V = T>
+    std::enable_if_t<std::is_same_v<void, V>, void> get()
+    {
+        for (size_t i = 0; i < f.size(); ++i)
+            f[i].get();
+    }
+
     /**
      * @brief Wait for all the futures stored in this multi_future object.
      */