Fight Optional

[stg.git] / include / stg / splice.h

diff --git a/include/stg/splice.h b/include/stg/splice.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/stg/splice.h
@@ -0,0 +1,36 @@
+/*
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#pragma once
+
+#include <optional>
+
+namespace STG
+{
+
+template<typename T>
+inline
+void splice(std::optional<T>& lhs, const std::optional<T>& rhs) noexcept
+{
+    if (rhs)
+        lhs = rhs.value();
+}
+
+}