draconware-dev · dragon7307 · Sep 28, 2025 · Sep 9, 2024 · Nov 14, 2024 · Nov 15, 2024
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
@@ -1,28 +1,28 @@
 # Contributing to SpanExtensions.Net
- 
+
 ### Did you catch a bug?
 
 **!!!Important!!!**  
-If the bug poses a threat to the security of dependent applications, please refer to our [Security Policy](SECURITY.md).  
+If the bug poses a threat to the security of dependent applications, please refer to our [Security Policy](SECURITY.md).
 
 There are two options available:
 
-1. You can open an issue describing exactly: 
-    - What is the bug and what did you expect to happen?
-    - How may it be reproduced (It is often helpful to include images or alike). 
-    - Include the Version of SpanExtensions.Net affected.
-2. Even better, you can fix the issue yourself by submitting a pull reqest.
+1. You can open an issue describing exactly:
+   - What the bug is and what you expected to happen?
+   - How it may be reproduced (It is often helpful to include images or alike).
+   - hich versions of SpanExtensions.Net affected.
+2. Even better, fix any issue yourself by submitting a pull request.
 
 ### Do you have a feature request?
 
 Tell us all about it (here)[]. Please consider however, that features should generally be implementable via Extension Methods, otherwise they are unlikely to be accepted.
 
-### Did you notice a mistake or an error in the documentation? 
+### Did you notice a mistake or an error in the documentation?
 
-If you found a spelling mistake or an ambigous or unclear sentence or phrase in the XML documentation in C# source files or in any of the documentation for this repository (for example: Readme.md), do one of the following: 
+If you found a spelling mistake or an ambigous or unclear sentence or phrase in the XML documentation in C# source files or in any of the documentation for this repository (for example: Readme.md), do one of the following:
 
-[Open an **Issue**](https://github.com/draconware-dev/SpanExtensions.Net/issues/new/choose) with the tag `documentation`. It is recommended to follow the [example template](https://github.com/draconware-dev/SpanExtensions.Net/issues/new?assignees=&labels=documentation&projects=&template=documentation-report.md&title=Documentation+Error). 
+[Open an **Issue**](https://github.com/draconware-dev/SpanExtensions.Net/issues/new/choose) with the tag `documentation`. It is recommended to follow the [example template](https://github.com/draconware-dev/SpanExtensions.Net/issues/new?assignees=&labels=documentation&projects=&template=documentation-report.md&title=Documentation+Error).
 
 **OR**
 
-[Open a **Pull Request**](https://github.com/draconware-dev/SpanExtensions.Net/compare) linked to an **Issue** tagged `documentation`, as grammatical errors are usually easier to fix, than they are to describe. In this case it is not necessary to describe the error in detail, a brief report with reasoning should do, unless it is not evident from the Pull Request, what actually was changed or why it was changed. 
+[Open a **Pull Request**](https://github.com/draconware-dev/SpanExtensions.Net/compare) linked to an **Issue** tagged `documentation`, as grammatical errors are usually easier to fix, than they are to describe. In this case it is not necessary to describe the error in detail, a brief report with reasoning should do, unless it is not evident from the Pull Request, what actually was changed or why it was changed.
diff --git a/.github/README.md b/.github/README.md
@@ -5,84 +5,17 @@
 [![GitHub License](https://img.shields.io/github/license/draconware-dev/SpanExtensions.Net)](https://github.com/draconware-dev/SpanExtensions.Net/blob/main/LICENSE)
 
 ## About
-**`ReadonlySpan<T>`** and **`Span<T>`** are great Types in _C#_, but unfortunately working with them can sometimes be sort of a hassle and some use cases seem straight up impossible, even though they are not.  
 
-**SpanExtensions.Net** aims to help developers use `ReadonlySpan<T>` and `Span<T>` more **productively**, **efficiently** and **safely** and write overall more **performant** Programs.  
-
-Never again switch back to using `string` instead of `ReadonlySpan<T>`, just because the method you seek is not supported.  
-
-**SpanExtensions.Net** provides alternatives for many missing Extension Methods for **`ReadonlySpan<T>`** and **`Span<T>`**, ranging from `string.Split()` over `Enumerable.Skip()` and `Enumerable.Take()` to an improved `ReadOnlySpan<T>.IndexOf()`.
+Never again switch back to using `string` instead of `ReadonlySpan<T>`, just because the method you seek is not supported.
 
-## Methods 
-The following **Extension Methods** are contained: 
-
-#### String Methods made available for **`ReadonlySpan<T>`** and **`Span<T>`**:
-
-- `(ReadOnly-)Span<T>.Split(T delimiter)`
-- `(ReadOnly-)Span<T>.Split(T delimiter, int count)`
-- `(ReadOnly-)Span<T>.Split(T delimiter, StringSplitOptions options)` 
-- `(ReadOnly-)Span<T>.Split(T delimiter, StringSplitOptions options, int count)`
-- `(ReadOnly-)Span<T>.Split(ReadOnlySpan<T> delimiters)`
-- `(ReadOnly-)Span<T>.Split(ReadOnlySpan<T> delimiters, int count)`
-- `(ReadOnly-)Span<T>.Split(ReadOnlySpan<T> delimiters, StringSplitOptions options)` 
-- `(ReadOnly-)Span<T>.Split(ReadOnlySpan<T> delimiters, StringSplitOptions options, int count)`
-- `(ReadOnly-)Span<T>.SplitAny(ReadOnlySpan<T> delimiters)`
-- `(ReadOnly-)Span<T>.SplitAny(ReadOnlySpan<T> delimiters, int count)`
-- `(ReadOnly-)Span<T>.SplitAny(ReadOnlySpan<T> delimiters, StringSplitOptions options)` 
-- `(ReadOnly-)Span<T>.SplitAny(ReadOnlySpan<T> delimiters, StringSplitOptions options, int count)`
-- `(ReadOnly-)Span<T>.Remove(int startIndex)`
-- `Span<T>.Replace(T oldT, T newT)`
-
-#### Linq Methods made available for **`ReadonlySpan<T>`** and **`Span<T>`**:
-
-- `(ReadOnly-)Span<T>.All(Predicate<T> predicate)` 
-- `(ReadOnly-)Span<T>.Any(Predicate<T> predicate)` 
-- `(ReadOnly-)Span<T>.Average()` 
-- `(ReadOnly-)Span<T>.Sum()`  
-- `(ReadOnly-)Span<T>.Skip(int count)` 
-- `(ReadOnly-)Span<T>.Take(int count)`
-- `(ReadOnly-)Span<T>.SkipLast(int count)` 
-- `(ReadOnly-)Span<T>.Takelast(int count)`
-- `(ReadOnly-)Span<T>.SkipWhile(Predicate<T> condition)` 
-- `(ReadOnly-)Span<T>.TakeWhile(Predicate<T> condition)`
-- `(Readonly-)Span<T>.First()`
-- `(Readonly-)Span<T>.First(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.FirstOrDefault()`
-- `(Readonly-)Span<T>.FirstOrDefault(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.FirstOrDefault(T defaultValue)`
-- `(Readonly-)Span<T>.FirstOrDefault(Predicate<T> predicate, T defaultValue)`
-- `(Readonly-)Span<T>.Last()`
-- `(Readonly-)Span<T>.Last(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.LastOrDefault()`
-- `(Readonly-)Span<T>.LastOrDefault(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.LastOrDefault(T defaultValue)`
-- `(Readonly-)Span<T>.LastOrDefault(Predicate<T> predicate, T defaultValue)`
-- `(Readonly-)Span<T>.Single()`
-- `(Readonly-)Span<T>.Single(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.SingleOrDefault()`
-- `(Readonly-)Span<T>.SingleOrDefault(Predicate<T> predicate)`
-- `(Readonly-)Span<T>.SingleOrDefault(T defaultValue)`
-- `(Readonly-)Span<T>.SingleOrDefault(Predicate<T> predicate, T defaultValue)`
-- `(Readonly-)Span<T>.ElementAt(int index)`
-- `(Readonly-)Span<T>.ElementAt(Index index)`
-- `(Readonly-)Span<T>.ElementAtOrDefault(int index)`
-- `(Readonly-)Span<T>.ElementAtOrDefault(Index index)`
-- `(Readonly-)Span<T>.ElementAtOrDefault(int index, T defaultValue)`
-- `(Readonly-)Span<T>.ElementAtOrDefault(Index index, T defaultValue)`
-- `(Readonly-)Span<T>.Min()`
-- `(Readonly-)Span<T>.Min(Func<TSource, TResult> selector)`
-- `(Readonly-)Span<T>.MinBy(Func<TSource, TKey> keySelector)`
-- `(Readonly-)Span<T>.MinBy(Func<TSource, TKey> keySelector, IComparer<TKey> comparer)`
-- `(Readonly-)Span<T>.Max()`
-- `(Readonly-)Span<T>.Max(Func<TSource, TResult> selector)`
-- `(Readonly-)Span<T>.MaxBy(Func<TSource, TKey> keySelector)`
-- `(Readonly-)Span<T>.MaxBy(Func<TSource, TKey> keySelector, IComparer<TKey> comparer)`
+**SpanExtensions.Net** aims to help developers use `ReadonlySpan<T>` and `Span<T>` more **productively**, **efficiently** and **safely** and write overall more **performant** Programs.
 
 ## Contributing
 
 Thank you for your interest in contributing to this project - Please see [Contributing](CONTRIBUTING.md)!
+
 ## License
 
-Copyright (c) draconware-dev. All rights reserved. 
+Copyright (c) draconware-dev. All rights reserved.
 
 Licensed under the [MIT](../LICENSE) License.
diff --git a/.github/SECURITY.md b/.github/SECURITY.md
@@ -2,4 +2,4 @@
 
 ## Reporting a Vulnerability
 
-If you find a security vulnerability please message **draconware@gmail.com** about the vulnerability and do not, **under no circumstances**, open a public issue. 
+If you find a security vulnerability please message **draconware@gmail.com** about the vulnerability and do not, **under no circumstances**, open a public issue.
diff --git a/Changelog.md b/Changelog.md
@@ -3,7 +3,30 @@
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
-and this project adheres not (yet) to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) from v2.0 onwards.
+
+## [2.0.0] - 2025-9-28
+
+### Fixed
+
+- an empty array not being treated as whitespace by range-based Split methods (https://github.com/draconware-dev/SpanExtensions.Net/pull/27)
+- the SearchValues-overload of range-based Split methods.
+
+### Changed
+
+- vectorized `Min()` and `Max()`.
+- transitioned to semantic versioning.
+
+## [1.5.1] - 2024-12-14
+
+### Fixed
+
+- incorrect ranges returned by the range-based Split method for versions prior to .Net 9.
+
+### Changed
+
+- moved MemoryExtensions containing range-based Split method for versions prior to .Net 9 from `System` to `SpanExtensions`.
+- grammatical issues in some documentation comments.
 
 ## [1.5.1] - 2024-12-14
 
@@ -22,49 +45,49 @@ and this project adheres not (yet) to [Semantic Versioning](https://semver.org/s
 
 - implementations of the newly introduced Span.Split methods from .Net 9 for any version prior to .Net 9 to maintain backwards-compatibility across .Net versions.
 
-### Changed 
+### Changed
 
 - Split extension methods to refer to new split implementations compatible to the ones in .Net 9 and made .Net 9 split methods the default from that version onwards. The original split methods are still accessible as static methods.
 - original Split methods are no longer available without passing span as a parameter.
 
 ## [1.4.2] - 2024-10-29
 
-### Added 
+### Added
 
 - `(Readonly-)Span<T>.Count(...)` overloads to all versions before .Net 8 matching these introduced in .Net 8.
 
-### Changed 
+### Changed
 
-- blocked compilation on .Net 9 due to known incompatibilities, which are to be resolved in version 1.5. 
+- blocked compilation on .Net 9 due to known incompatibilities, which are to be resolved in version 1.5.
 
 ## [1.4.1] - 2024-9-9
 
-### Fixed 
+### Fixed
 
 - a collision between the `Span<T>.Replace` method provided by SpanExtensions and the one newly provided by .Net 8.
 
 ## [1.4] - 2024-9-3
 
-### Added 
+### Added
 
 - `(Readonly-)Span<T>.Count()`
 - `(Readonly-)Span<T>.Count(Predicate<T> predicate)`
 
-### Changed 
+### Changed
 
 - `Split` to throw an `ArgumentException` instead of an `InvalidCountExceedingBehaviourException`
 
-### Removed 
+### Removed
 
 - `InvalidCountExceedingBehaviourException`
 
-### Fixed 
+### Fixed
 
-- various issues with `Split` (https://github.com/draconware-dev/SpanExtensions.Net/pull/11) 
+- various issues with `Split` (https://github.com/draconware-dev/SpanExtensions.Net/pull/11)
 
 ## [1.3] - 2024-3-19
 
-### Added 
+### Added
 
 - Compatibility with **.Net 8**
 - `(Readonly-)Span<T>.First()`
@@ -102,42 +125,42 @@ and this project adheres not (yet) to [Semantic Versioning](https://semver.org/s
 - nuget badge to README (https://github.com/draconware-dev/SpanExtensions.Net/pull/12)
 - `CountExceedingBehaviour`, which is passed to Split, defining how to properly handle its remaining elements.
 
-### Changed 
+### Changed
 
 - documentation comments to better reflect the dotnet style (https://github.com/draconware-dev/SpanExtensions.Net/pull/8)
 - swapped order of `count` and `stringSplitOptions arguments` in `Split` methods.
 - renamed argument `span` in `Split` methods to `source`.
 
-### Fixed 
+### Fixed
 
 - empty spans being ignored if they are the last element to be returned from `Split` and are therefore not returned. (https://github.com/draconware-dev/SpanExtensions.Net/pull/10)
 
 ## [1.2.1] - 2024-1-25
 
-### Fixed 
+### Fixed
 
 - Ambiguous Extension Methods (https://github.com/draconware-dev/SpanExtensions.Net/issues/6)
-- Correctness of some documentation comments     
+- Correctness of some documentation comments
 
 ## [1.2.0] - 2023-12-28
 
-### Added 
+### Added
 
 - Missing documentation comments
 
-### Fixed 
+### Fixed
 
 - Grammatical issues in some documentation comments
 
-### Changed 
+### Changed
 
-- moved custom Enumerators into `SpanExtensions.Enumerators` 
+- moved custom Enumerators into `SpanExtensions.Enumerators`
 - declared every `GetEnumerator` method in a ref struct as `readonly`
-- renamed the source ReadOnlySpan<T> in 10 out of 12 custom Enumerators from *span* to *source* 
+- renamed the source ReadOnlySpan<T> in 10 out of 12 custom Enumerators from _span_ to _source_
 
 ## [1.1.0] - 2023-11-4
 
-### Added 
+### Added
 
 - Compatibility with **.Net 6**
 - Compatibility with **.Net 5**
@@ -149,7 +172,7 @@ and this project adheres not (yet) to [Semantic Versioning](https://semver.org/s
 - Missing documentation comments
 - Changelog
 
-### Fixed 
+### Fixed
 
 - Grammatical issues in some documentation comments
 - Broken link to the repository on nuget ([#3](https://github.com/draconware-dev/SpanExtensions.Net/pull/3))
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 draconware-dev
+Copyright (c) 2025 draconware-dev
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

diff --git a/SpanExtensions.sln b/SpanExtensions.sln
@@ -15,16 +15,16 @@ Global
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Debug|Any CPU.ActiveCfg = Release|Any CPU
+		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Debug|Any CPU.Build.0 = Release|Any CPU
 		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{75DE5AFD-663E-415D-9B95-6BC513BD4A07}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B48A0293-A7FF-4E39-8F8D-57B6F824D70F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B48A0293-A7FF-4E39-8F8D-57B6F824D70F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B48A0293-A7FF-4E39-8F8D-57B6F824D70F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B48A0293-A7FF-4E39-8F8D-57B6F824D70F}.Release|Any CPU.Build.0 = Release|Any CPU
-		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Debug|Any CPU.ActiveCfg = Release|Any CPU
+		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Debug|Any CPU.Build.0 = Release|Any CPU
 		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CE74F420-1038-4E51-AC31-00DA964CC4F5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection

diff --git a/src/Enumerators/System/SpanSplitEnumerator.cs b/src/Enumerators/System/SpanSplitEnumerator.cs
@@ -1,7 +1,5 @@
 using System;
 using System.Buffers;
-using System.Diagnostics;
-using System.Runtime.CompilerServices;
 
 #if !NET9_0_OR_GREATER
 
@@ -62,7 +60,7 @@ internal SpanSplitEnumerator(ReadOnlySpan<T> source, SearchValues<T> searchValue
                 Delimiter = default!;
                 SearchValues = searchValues;
                 DelimiterSpan = default;
-                mode = SpanSplitEnumeratorMode.Delimiter;
+                mode = SpanSplitEnumeratorMode.SearchValues;
                 currentStartIndex = 0;
                 currentEndIndex = 0;
                 nextStartIndex = 0;
@@ -118,19 +116,17 @@ public bool MoveNext()
                 }
 
                 currentStartIndex = nextStartIndex;
-                
+
                 if(index < 0)
                 {
                     currentEndIndex = Span.Length;
                     nextStartIndex = Span.Length;
-
                     mode = (SpanSplitEnumeratorMode)(-1);
                     return true;
                 }
 
                 currentEndIndex = currentStartIndex + index;
                 nextStartIndex = currentEndIndex + length;
-
                 return true;
             }
         }
Original file line number	Diff line number	Diff line change
Expand Up		@@ -2,4 +2,4 @@

		## Reporting a Vulnerability

		If you find a security vulnerability please message draconware@gmail.com about the vulnerability and do not, under no circumstances, open a public issue.
		If you find a security vulnerability please message draconware@gmail.com about the vulnerability and do not, under no circumstances, open a public issue.