From c3a7fc2aabeeefc6cbf6729cb67199bc6b91f1da Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <matthias.hochsteger@tuwien.ac.at>
Date: Wed, 10 Jul 2019 12:57:19 +0200
Subject: [PATCH] Switch to C++17

---
 CMakeLists.txt             | 4 ++--
 libsrc/general/ngarray.hpp | 7 +------
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ed6c3e55..2e899ac1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@ if(WIN32)
   # we are linking to object libraries on Windows
   cmake_minimum_required(VERSION 3.12)
 else(WIN32)
-  cmake_minimum_required(VERSION 3.1.3)
+  cmake_minimum_required(VERSION 3.8)
 endif(WIN32)
 
 if(NOT WIN32)
@@ -216,7 +216,7 @@ macro(get_dll_from_lib dll_path lib_path)
         get_filename_component(lib_name ${lib} name)
 endmacro()
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 if(WIN32)
     get_WIN32_WINNT(ver)
     add_definitions(-D_WIN32_WINNT=${ver} -DWNT -DWNT_WINDOW -DNOMINMAX)
diff --git a/libsrc/general/ngarray.hpp b/libsrc/general/ngarray.hpp
index e819fcc2..2c4aed21 100644
--- a/libsrc/general/ngarray.hpp
+++ b/libsrc/general/ngarray.hpp
@@ -429,16 +429,11 @@ namespace netgen
 	  T * p = new T[nsize];
 	
 	  size_t mins = (nsize < size) ? nsize : size; 
-          // memcpy (p, data, mins * sizeof(T));
 
-#if defined(__GNUG__) && __GNUC__ < 5 && !defined(__clang__)
-          for (size_t i = 0; i < mins; i++) p[i] = move(data[i]);
-#else
-          if (std::is_trivially_copyable<T>::value)
+          if constexpr(std::is_trivially_copyable<T>::value)
             memcpy (p, data, sizeof(T)*mins);
           else
             for (size_t i = 0; i < mins; i++) p[i] = move(data[i]);
-#endif
 
 	  if (ownmem)
 	    delete [] data;