Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/finally.h

@@ -0,0 +1,46 @@
+// This file is part of VSTGUI. It is subject to the license terms
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#pragma once
+
+#include "vstguifwd.h"
+
+//------------------------------------------------------------------------
+namespace VSTGUI {
+
+//------------------------------------------------------------------------
+template <typename Proc>
+class FinalAction
+{
+public:
+	explicit FinalAction (Proc action) noexcept : action (std::move (action)) {}
+	FinalAction (FinalAction&& other) noexcept
+	{
+		action = std::move (other.action);
+		other.invoke = false;
+	}
+	FinalAction (const FinalAction&) = delete;
+	FinalAction& operator= (const FinalAction&) = delete;
+	FinalAction& operator= (FinalAction&&) = delete;
+
+	~FinalAction () noexcept
+	{
+		if (invoke)
+			action ();
+	}
+
+private:
+	Proc action;
+	bool invoke {true};
+};
+
+//------------------------------------------------------------------------
+template <class F>
+auto finally (F&& f) noexcept
+{
+	return FinalAction<typename std::remove_cv<typename std::remove_reference<F>::type>::type> (
+	    std::forward<F> (f));
+}
+//------------------------------------------------------------------------
+} // VSTGUI