From 68cc982dcb7c1063a96f7ec9b7ccb95da4919d6b Mon Sep 17 00:00:00 2001
From: Jacques Lucke <mail@jlucke.com>
Date: Mon, 10 Feb 2020 13:54:57 +0100
Subject: BLI: improve various C++ data structures

The changes come from the `functions` branch, where I'm using
these structures a lot.

This also includes a new `BLI::Optional<T>` type, which is similar
to `std::Optional<T>` which can be used when Blender starts using
C++17.
---
 source/blender/blenlib/BLI_kdtree.h | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'source/blender/blenlib/BLI_kdtree.h')

diff --git a/source/blender/blenlib/BLI_kdtree.h b/source/blender/blenlib/BLI_kdtree.h
index 9e966ffb798..9ba045fdbf8 100644
--- a/source/blender/blenlib/BLI_kdtree.h
+++ b/source/blender/blenlib/BLI_kdtree.h
@@ -17,6 +17,10 @@
 #ifndef __BLI_KDTREE_H__
 #define __BLI_KDTREE_H__
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** \file
  * \ingroup bli
  * \brief A kd-tree for nearest neighbor search.
@@ -66,4 +70,8 @@
 #undef KDTreeNearest
 #undef KDTREE_PREFIX_ID
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* __BLI_KDTREE_H__ */
-- 
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