From f31106a93806f4c6d8a83ae0e3a3876dc4fa58ff Mon Sep 17 00:00:00 2001
From: Mathieu BAGUE <mathieu.bague@rte-france.com>
Date: Mon, 10 Jan 2022 17:25:19 +0100
Subject: [PATCH] Fix compilation under CentOS 7 and Clang (#415)

* Fix compilation under CentOS 7 and Clang

Signed-off-by: Mathieu BAGUE <mathieu.bague@rte-france.com>
---
 include/powsybl/iidm/BusCache.hpp    | 3 +--
 include/powsybl/stdcxx/flattened.hpp | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/powsybl/iidm/BusCache.hpp b/include/powsybl/iidm/BusCache.hpp
index f68b2ba71..62ca0343c 100644
--- a/include/powsybl/iidm/BusCache.hpp
+++ b/include/powsybl/iidm/BusCache.hpp
@@ -13,6 +13,7 @@
 #include <mutex>
 #include <string>
 
+#include <powsybl/iidm/Bus.hpp>
 #include <powsybl/stdcxx/optional.hpp>
 #include <powsybl/stdcxx/range.hpp>
 #include <powsybl/stdcxx/reference.hpp>
@@ -21,8 +22,6 @@ namespace powsybl {
 
 namespace iidm {
 
-class Bus;
-
 class BusCache {
 public:
     using BusSupplier = std::function<stdcxx::const_range<Bus>()>;
diff --git a/include/powsybl/stdcxx/flattened.hpp b/include/powsybl/stdcxx/flattened.hpp
index 58e1cc3f2..12d3b0477 100644
--- a/include/powsybl/stdcxx/flattened.hpp
+++ b/include/powsybl/stdcxx/flattened.hpp
@@ -103,7 +103,7 @@ class FlatteningIterator :
 
 struct FlattenForwarder {};
 
-const FlattenForwarder flattened;
+const FlattenForwarder flattened {};
 
 template <typename SinglePassRange>
 using FlattenRange = boost::iterator_range<FlatteningIterator<typename boost::range_iterator<SinglePassRange>::type>>;