Reorganize project folders (#6)

include/ck/utility/array.hpp

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
+
+#ifndef CK_ARRAY_HPP
+#define CK_ARRAY_HPP
+
+#include "functional2.hpp"
+#include "sequence.hpp"
+
+namespace ck {
+
+template <typename TData, index_t NSize>
+struct Array
+{
+    using type      = Array;
+    using data_type = TData;
+
+    TData mData[NSize];
+
+    __host__ __device__ static constexpr index_t Size() { return NSize; }
+
+    __host__ __device__ constexpr const TData& At(index_t i) const { return mData[i]; }
+
+    __host__ __device__ constexpr TData& At(index_t i) { return mData[i]; }
+
+    __host__ __device__ constexpr const TData& operator[](index_t i) const { return At(i); }
+
+    __host__ __device__ constexpr TData& operator()(index_t i) { return At(i); }
+
+    template <typename T>
+    __host__ __device__ constexpr auto operator=(const T& a)
+    {
+        static_assert(T::Size() == Size(), "wrong! size not the same");
+
+        static_for<0, Size(), 1>{}([&](auto i) { operator()(i) = a[i]; });
+
+        return *this;
+    }
+    __host__ __device__ constexpr const TData* begin() const { return &mData[0]; }
+    __host__ __device__ constexpr const TData* end() const { return &mData[NSize]; }
+    __host__ __device__ constexpr TData* begin() { return &mData[0]; }
+    __host__ __device__ constexpr TData* end() { return &mData[NSize]; }
+};
+
+// empty Array
+template <typename TData>
+struct Array<TData, 0>
+{
+    using type      = Array;
+    using data_type = TData;
+
+    __host__ __device__ static constexpr index_t Size() { return 0; }
+};
+
+template <typename X, typename... Xs>
+__host__ __device__ constexpr auto make_array(X&& x, Xs&&... xs)
+{
+    using data_type = remove_cvref_t<X>;
+    return Array<data_type, sizeof...(Xs) + 1>{ck::forward<X>(x), ck::forward<Xs>(xs)...};
+}
+
+// make empty array
+template <typename X>
+__host__ __device__ constexpr auto make_array()
+{
+    return Array<X, 0>{};
+}
+
+} // namespace ck
+#endif