From 8fa5f36d1330a0a96a7058410c2348b1cc35372d Mon Sep 17 00:00:00 2001
From: Max Lyon <lyon@cs.rwth-aachen.de>
Date: Thu, 28 Nov 2019 11:50:03 +0100
Subject: [PATCH] make SmartRange sum and avg compatible with Eigen vectors

---
 src/OpenMesh/Core/Mesh/SmartRange.hh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/OpenMesh/Core/Mesh/SmartRange.hh b/src/OpenMesh/Core/Mesh/SmartRange.hh
index 5f925e0d..affaeb71 100644
--- a/src/OpenMesh/Core/Mesh/SmartRange.hh
+++ b/src/OpenMesh/Core/Mesh/SmartRange.hh
@@ -78,13 +78,13 @@ struct SmartRangeT
    *  @param f Functor that is applied to all elements before computing the sum
    */
   template <typename Functor>
-  auto sum(Functor&& f) -> decltype (f(std::declval<HandleT>())+f(std::declval<HandleT>()))
+  auto sum(Functor&& f) -> decltype (f(std::declval<HandleT>()))
   {
     auto range = static_cast<const RangeT*>(this);
     auto begin = range->begin();
     auto end   = range->end();
     assert(begin != end);
-    decltype (f(*begin) + f(*begin)) sum = f(*begin);
+    decltype (f(*begin)) sum = f(*begin);
     auto it = begin;
     ++it;
     for (; it != end; ++it)
@@ -99,13 +99,13 @@ struct SmartRangeT
    *  @param f Functor that is applied to all elements before computing the average.
    */
   template <typename Functor>
-  auto avg(Functor&& f) -> decltype (1.0 * (f(std::declval<HandleT>())+f(std::declval<HandleT>())))
+  auto avg(Functor&& f) -> decltype (f(std::declval<HandleT>()))
   {
     auto range = static_cast<const RangeT*>(this);
     auto begin = range->begin();
     auto end   = range->end();
     assert(begin != end);
-    decltype (f(*begin) + f(*begin)) sum = f(*begin);
+    decltype (f(*begin)) sum = f(*begin);
     auto it = begin;
     ++it;
     int n_elements = 1;