Pure attribute added, where applicable.

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()
 			{
 			}

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()
 			{
 			}

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
 

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