initial implementation

include/xo/distribution/Distribution.hpp

@@ -0,0 +1,20 @@
+/* @file Distribution.hpp */
+
+#pragma once
+
+#include "xo/refcnt/Refcounted.hpp"
+
+namespace xo {
+    namespace distribution {
+        /* abstract api for a cumulative probability distribution.
+         * over supplied Domain
+         */
+        template<typename Domain>
+        class Distribution : public ref::Refcount {
+        public:
+            virtual double cdf(Domain const & x) const = 0;
+        }; /*Distribution*/
+    } /*namespace distribution*/
+} /*namespace xo*/
+
+/* end Distribution.hpp */