From e57fa3d5728202d8f4728d0ee727a77a240d30e0 Mon Sep 17 00:00:00 2001
From: mlemanczyk <marek@lemanczyk.eu>
Date: Sun, 25 Jun 2023 02:25:32 +0200
Subject: [PATCH] Pure attribute added, where applicable.

---
 Recyclable.Collections/RecyclableList.Enumerator.cs         | 6 ++++--
 .../RecyclableList.VersionedEnumerator.cs                   | 6 ++++--
 Recyclable.Collections/RecyclableLongList.Enumerator.cs     | 4 ++++
 .../RecyclableLongList.VersionedEnumerator.cs               | 3 +++
 4 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/Recyclable.Collections/RecyclableList.Enumerator.cs b/Recyclable.Collections/RecyclableList.Enumerator.cs
index eb3a920..acaae28 100644
--- a/Recyclable.Collections/RecyclableList.Enumerator.cs
+++ b/Recyclable.Collections/RecyclableList.Enumerator.cs
@@ -1,4 +1,5 @@
 using System.Collections;
+using System.Diagnostics.Contracts;
 using System.Runtime.InteropServices;
 
 namespace Recyclable.Collections
@@ -14,9 +15,9 @@ namespace Recyclable.Collections
 			private readonly RecyclableList<T> _list;
 
 #nullable disable
-			// [Pure]
+			[Pure]
 			public readonly T Current => _list._memoryBlock[_currentItemIndex - 1];
-			// [Pure]
+			[Pure]
 			readonly object IEnumerator.Current => _list._memoryBlock[_currentItemIndex - 1];
 #nullable restore
 
@@ -37,6 +38,7 @@ namespace Recyclable.Collections
 				_list = list;
 			}
 
+			[Pure]
 			public readonly void Dispose()
 			{
 			}
diff --git a/Recyclable.Collections/RecyclableList.VersionedEnumerator.cs b/Recyclable.Collections/RecyclableList.VersionedEnumerator.cs
index 30795e0..5e729f7 100644
--- a/Recyclable.Collections/RecyclableList.VersionedEnumerator.cs
+++ b/Recyclable.Collections/RecyclableList.VersionedEnumerator.cs
@@ -16,9 +16,10 @@ namespace Recyclable.Collections
 			private readonly RecyclableList<T> _list;
 
 #nullable disable
-			// [Pure]
+			[Pure]
 			public readonly T Current => _enumeratorVersion == _list._version ? _list._memoryBlock[_currentItemIndex - 1] : throw new InvalidOperationException();
-			// [Pure]
+
+			[Pure]
 			readonly object IEnumerator.Current => _enumeratorVersion == _list._version ? _list._memoryBlock[_currentItemIndex - 1] : throw new InvalidOperationException();
 #nullable restore
 
@@ -47,6 +48,7 @@ namespace Recyclable.Collections
 				_enumeratorVersion = list._version;
 			}
 
+			[Pure]
 			public readonly void Dispose()
 			{
 			}
diff --git a/Recyclable.Collections/RecyclableLongList.Enumerator.cs b/Recyclable.Collections/RecyclableLongList.Enumerator.cs
index 2f28434..01c94dd 100644
--- a/Recyclable.Collections/RecyclableLongList.Enumerator.cs
+++ b/Recyclable.Collections/RecyclableLongList.Enumerator.cs
@@ -1,4 +1,5 @@
 using System.Collections;
+using System.Diagnostics.Contracts;
 
 namespace Recyclable.Collections
 {
@@ -19,6 +20,8 @@ namespace Recyclable.Collections
 #nullable disable
 			private T _current;
 #nullable restore
+
+			[Pure]
 			public readonly T Current => _current;
 
 			public bool MoveNext()
@@ -52,6 +55,7 @@ namespace Recyclable.Collections
 			}
 
 #nullable disable
+			[Pure]
 			readonly object IEnumerator.Current => _current;
 #nullable restore
 
diff --git a/Recyclable.Collections/RecyclableLongList.VersionedEnumerator.cs b/Recyclable.Collections/RecyclableLongList.VersionedEnumerator.cs
index 843c46a..64e554a 100644
--- a/Recyclable.Collections/RecyclableLongList.VersionedEnumerator.cs
+++ b/Recyclable.Collections/RecyclableLongList.VersionedEnumerator.cs
@@ -24,6 +24,8 @@ public partial class RecyclableLongList<T> : IRecyclableVersionedLongList<T>
 #nullable disable
 			private T _current;
 #nullable restore
+
+			[Pure]
 			public readonly T Current => _enumeratorVersion == _list._version ? _current : throw new InvalidOperationException();
 
 			private readonly ulong _enumeratorVersion;
@@ -65,6 +67,7 @@ public partial class RecyclableLongList<T> : IRecyclableVersionedLongList<T>
 			}
 
 #nullable disable
+			[Pure]
 			readonly object IEnumerator.Current => _enumeratorVersion == _list._version ? _current : throw new InvalidOperationException();
 #nullable restore