From 9d753a84712e88a69c721f93d2ee7395b8c1ca4c Mon Sep 17 00:00:00 2001
From: ig <ig ig@devnullmail.com>
Date: Thu, 9 Mar 2023 14:01:57 +0100
Subject: [PATCH] Introduce State<T> for Enums

---
 csharp/Lib/Units/State.cs    |  9 ++++++++-
 csharp/Lib/Units/StateOfT.cs | 27 +++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 csharp/Lib/Units/StateOfT.cs

diff --git a/csharp/Lib/Units/State.cs b/csharp/Lib/Units/State.cs
index 3e8e48395..88610517c 100644
--- a/csharp/Lib/Units/State.cs
+++ b/csharp/Lib/Units/State.cs
@@ -34,4 +34,11 @@ public readonly struct State : IReadOnlyList<String>
 
     public Int32 Count => Values.Count;
     public String this[Int32 index] => Values[index];
-}
\ No newline at end of file
+
+    public static State<T> From<T>(T t) where T : Enum
+    {
+        return new State<T>(t);
+    }
+}
+
+
diff --git a/csharp/Lib/Units/StateOfT.cs b/csharp/Lib/Units/StateOfT.cs
new file mode 100644
index 000000000..4a1242dc2
--- /dev/null
+++ b/csharp/Lib/Units/StateOfT.cs
@@ -0,0 +1,27 @@
+using System.Collections;
+
+namespace InnovEnergy.Lib.Units;
+
+public readonly struct State<T> : IReadOnlyList<T> where T:Enum
+{
+    public IReadOnlyList<T> Values { get; }
+    
+    public State(IReadOnlyList<T> values) => Values = values;
+
+    public State(params T[] values) : this((IReadOnlyList<T>)values){}
+    public State(params State<T>[] states) : this((IReadOnlyList<T>)states.SelectMany(s => s.Values).ToList()){}
+
+    public static implicit operator State<T>(T s)       => new((IReadOnlyList<T>)s);
+    public static implicit operator State<T>(List<T> s) => new((IReadOnlyList<T>)s);
+    public static implicit operator State<T>(T[] s)     => new((IReadOnlyList<T>)s);
+    
+    public static State<T> operator |(State<T> left, State<T> right) => new State<T>(left, right);
+
+    public IEnumerator<T> GetEnumerator() => Values.GetEnumerator();
+
+    public override String ToString() => String.Join("; ", Values);
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+
+    public Int32 Count => Values.Count;
+    public T this[Int32 index] => Values[index];
+}
\ No newline at end of file