Reorganize files, Part 1 (#119)

* delete obselete files

* move files

* build

* update cmake

* update cmake

* fix build

* reorg examples

* update cmake for example and test

include/ck/utility/functional2.hpp

@@ -0,0 +1,48 @@
+#ifndef CK_FUNCTIONAL2_HPP
+#define CK_FUNCTIONAL2_HPP
+
+#include "functional.hpp"
+#include "sequence.hpp"
+
+namespace ck {
+
+namespace detail {
+
+template <class>
+struct static_for_impl;
+
+template <index_t... Is>
+struct static_for_impl<Sequence<Is...>>
+{
+    template <class F>
+    __host__ __device__ constexpr void operator()(F f) const
+    {
+        swallow{(f(Number<Is>{}), 0)...};
+    }
+};
+
+} // namespace detail
+
+// F signature: F(Number<Iter>)
+template <index_t NBegin, index_t NEnd, index_t Increment>
+struct static_for
+{
+    __host__ __device__ constexpr static_for()
+    {
+        static_assert(Increment != 0 && (NEnd - NBegin) % Increment == 0,
+                      "Wrong! should satisfy (NEnd - NBegin) % Increment == 0");
+        static_assert((Increment > 0 && NBegin <= NEnd) || (Increment < 0 && NBegin >= NEnd),
+                      "wrongs! should (Increment > 0 && NBegin <= NEnd) || (Increment < 0 && "
+                      "NBegin >= NEnd)");
+    }
+
+    template <class F>
+    __host__ __device__ constexpr void operator()(F f) const
+    {
+        detail::static_for_impl<typename arithmetic_sequence_gen<NBegin, NEnd, Increment>::type>{}(
+            f);
+    }
+};
+
+} // namespace ck
+#endif