fix windows compilation

Davide Faconti · Davide Faconti · commit e98bf3630697 · 2019-03-20T12:55:32.000+01:00
diff --git a/include/behaviortree_cpp/utils/make_unique.hpp b/include/behaviortree_cpp/utils/make_unique.hpp
@@ -2,8 +2,15 @@
 
 #include <memory>
 
-// https://en.cppreference.com/w/cpp/feature_test
-#if not __has_cpp_attribute(__cpp_lib_make_unique)
+#if defined(_MSC_VER) && __cplusplus == 201103L
+#  define MAKE_UNIQUE_DEFINED 1
+#endif
+
+#ifdef __cpp_lib_make_unique
+#  define MAKE_UNIQUE_DEFINED 1
+#endif
+
+#ifndef MAKE_UNIQUE_DEFINED
 
 //The compiler doesn't provide it, so implement it ourselves.
 
