From ed419140280553b070943b7ba539120a26ff5686 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Tue, 11 Dec 2018 07:42:05 +0100
Subject: wanda: restructure directory hierarchy

---
 include/wanda/keyed.hpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 include/wanda/keyed.hpp

(limited to 'include/wanda/keyed.hpp')

diff --git a/include/wanda/keyed.hpp b/include/wanda/keyed.hpp
new file mode 100644
index 0000000..58f17ad
--- /dev/null
+++ b/include/wanda/keyed.hpp
@@ -0,0 +1,28 @@
+/**
+ * @file   keyed.hpp
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @since  1.0.0
+ */
+
+#ifndef WANDA_KEYED_HPP
+#define WANDA_KEYED_HPP
+
+namespace wanda
+{
+  /**
+   * @brief A tag type to prevent construction of a type without a factory
+   */
+  template<typename Derived>
+  struct keyed
+  {
+  protected:
+    struct key
+    {
+    };
+
+    explicit keyed(key) {}
+  };
+
+}  // namespace wanda
+
+#endif
\ No newline at end of file
-- 
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