From 857e81518f271649f7ced13a46561eedf3ec9b5e Mon Sep 17 00:00:00 2001
From: Andrei Sergeev <a.sergeev.official@gmail.com>
Date: Thu, 11 Jan 2024 10:13:44 +0400
Subject: [PATCH] Add Cast method

---
 .../FlatArray.T/Functional/Functional.Cast.cs | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/flatcollections-array/FlatArray/FlatArray.T/Functional/Functional.Cast.cs

diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/Functional/Functional.Cast.cs b/src/flatcollections-array/FlatArray/FlatArray.T/Functional/Functional.Cast.cs
new file mode 100644
index 0000000..2922ad4
--- /dev/null
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/Functional/Functional.Cast.cs
@@ -0,0 +1,29 @@
+namespace System;
+
+partial struct FlatArray<T>
+{
+    // TODO: Add the tests and make public
+    internal FlatArray<TResult> Cast<TResult>()
+    {
+        if (length == default)
+        {
+            return default;
+        }
+
+        if (items is TResult[] resultItems)
+        {
+            return new(length, resultItems);
+        }
+
+        resultItems = new TResult[length];
+
+        var counter = 0;
+        do
+        {
+            resultItems[counter] = (TResult)(object)items![counter]!;
+        }
+        while (++counter < resultItems.Length);
+
+        return new(resultItems, default);
+    }
+}