Add Dotnet Implementation

.github/workflows/release-nuget.yaml

@@ -0,0 +1,22 @@
+name: Release NuGet
+
+on:
+  push:
+    branches: [ release/* ]
+
+jobs:
+  publish-nuget:
+    name: Publish package to NuGet.org
+    # Failing on `ubuntu-24.04` (https://github.com/cucumber/gherkin/issues/349)
+    runs-on: ubuntu-22.04
+    environment: Release
+    steps:
+      - uses: actions/checkout@v5
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: 9.0.x
+      - uses: cucumber/[email protected]
+        with:
+          nuget-api-key: ${{ secrets.NUGET_API_KEY }}
+          working-directory: "dotnet"

.github/workflows/test-dotnet.yml

@@ -0,0 +1,32 @@
+name: test-dotnet
+
+on:
+  push:
+    branches:
+      - main
+      - renovate/**
+    paths:
+      - dotnet/**
+      - testdata/**
+      - .github/**
+  pull_request:
+    branches:
+      - main
+    paths:
+      - dotnet/**
+      - testdata/**
+      - .github/**
+  workflow_call:
+
+jobs:
+  test-dotnet:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: |
+            8.0.x
+            9.0.x
+      - run: dotnet test
+        working-directory: dotnet

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Render the empty tag expression as an empty string ([#222](https://github.com/cucumber/tag-expressions/pull/222))
 - Improve error message for missing operands ([#221](https://github.com/cucumber/tag-expressions/pull/221))
 
+- [.NET] Add a .NET implementation
+
 ## [8.0.0] - 2025-10-14
 ### Fixed
 - [Perl] Fix building release artifacts ([#214](https://github.com/cucumber/tag-expressions/pull/214))

dotnet/.editorconfig

@@ -0,0 +1,13 @@
+root=true
+
+[*]
+indent_style=space
+end_of_line=crlf
+charset=utf-8
+
+[*.{csproj,props}]
+indent_size=2
+
+[*.cs]
+indent_size=4
+insert_final_newline = true

dotnet/.gitignore

@@ -0,0 +1,178 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.sln.docstates
+*.ide
+
+# Build results
+
+[Dd]ebug/
+[Rr]elease/
+x64/
+build/
+[Oo]bj/
+*/**/bin
+
+# Enable "build/" folder in the NuGet Packages folder since NuGet packages use it for MSBuild targets
+!packages/*/build/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+*_i.c
+*_p.c
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.log
+*.scc
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+*.ncrunch*
+.*crunch*.local.xml
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.Publish.xml
+
+# NuGet Packages Directory
+## TODO: If you have NuGet Package Restore enabled, uncomment the next line
+#packages/
+
+# Windows Azure Build Output
+csx
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+sql/
+*.Cache
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.[Pp]ublish.xml
+*.pfx
+*.publishsettings
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file to a newer
+# Visual Studio version. Backup files are not needed, because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+App_Data/*.mdf
+App_Data/*.ldf
+
+
+#LightSwitch generated files
+GeneratedArtifacts/
+_Pvt_Extensions/
+ModelManifest.xml
+
+# =========================
+# Windows detritus
+# =========================
+
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Mac desktop service store files
+.DS_Store
+
+packages/
+acceptance/
+output/
+.built
+.compared
+.sln_built_debug
+*.userprefs
+*.nupkg
+Gherkin.NuGetPackages/bin/
+.build*
+.built*
+.vscode
+.run_tests
+.generated
+.packed
+.tested
+.fixprotoc
+.vs/
+
+# ========================

dotnet/Cucumber.TagExpressions.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36616.10
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Cucumber.TagExpressions", "TagExpressions\Cucumber.TagExpressions.csproj", "{0BDD57B5-52F9-4866-8031-C84E41138453}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Cucumber.TagExpressionsTest", "TagExpressionsTest\Cucumber.TagExpressionsTest.csproj", "{EBEAC0FF-9EA0-4065-B39E-B9C4C29EE48A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0BDD57B5-52F9-4866-8031-C84E41138453}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0BDD57B5-52F9-4866-8031-C84E41138453}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0BDD57B5-52F9-4866-8031-C84E41138453}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0BDD57B5-52F9-4866-8031-C84E41138453}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EBEAC0FF-9EA0-4065-B39E-B9C4C29EE48A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EBEAC0FF-9EA0-4065-B39E-B9C4C29EE48A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EBEAC0FF-9EA0-4065-B39E-B9C4C29EE48A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EBEAC0FF-9EA0-4065-B39E-B9C4C29EE48A}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {0789D1F0-C759-4F1D-BED0-F55A1E05100B}
+	EndGlobalSection
+EndGlobal

dotnet/Directory.Build.props

@@ -0,0 +1,10 @@
+<Project>
+
+  <PropertyGroup>
+    <LangVersion>13</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+	<Nullable>enable</Nullable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+
+</Project>

dotnet/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Cucumber Ltd
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

dotnet/README.md

@@ -0,0 +1,5 @@
+[![NuGet Version](https://img.shields.io/nuget/v/Cucumber.TagExpressions)](https://www.nuget.org/packages/Cucumber.TagExpressions)
+
+# Cucumber Tag Expressions for .NET
+
+[The docs are here](https://cucumber.io/docs/cucumber/api/#tag-expressions).

dotnet/TagExpressions/Cucumber.TagExpressions.csproj

@@ -0,0 +1,41 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <NoWarn>1591</NoWarn>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\Cucumber.TagExpressions.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+
+  <PropertyGroup Label="Version">
+    <VersionNumber>8.0.0</VersionNumber>
+    <Version Condition="'$(SnapshotSuffix)' != ''">$(VersionNumber)-$(SnapshotSuffix)</Version>
+    <Version Condition="'$(SnapshotSuffix)' == ''">$(VersionNumber)</Version>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="$(MSBuildThisFileDirectory)\Resources\cucumber-mark-green-128.png">
+      <Pack>True</Pack>
+      <PackagePath>.</PackagePath>
+      <Visible>true</Visible>
+    </None>
+  </ItemGroup>
+
+  <PropertyGroup Label="Package Properties">
+    <Product>Cucumber.TagExpressions</Product>
+    <PackageId>Cucumber.TagExpressions</PackageId>
+    <Authors>Cucumber Ltd, Chris Rudolphi</Authors>
+    <Copyright>Copyright &#xA9; Cucumber Ltd, Chris Rudolphi</Copyright>
+    <Description>Tag Expressions is a simple query language for Cucumber tags.</Description>
+    <PackageTags>reqnroll gherkin cucumber</PackageTags>
+    <PackageProjectUrl>https://github.com/cucumber/tag-expressions</PackageProjectUrl>
+    <RepositoryUrl>https://github.com/cucumber/tag-expressions</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <PackageIcon>cucumber-mark-green-128.png</PackageIcon>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <PackageOutputPath>bin/$(Configuration)/NuGet</PackageOutputPath>
+  </PropertyGroup>
+
+</Project>

dotnet/TagExpressions/ITagExpression.cs

@@ -0,0 +1,20 @@
+namespace Cucumber.TagExpressions;
+
+/// <summary>
+/// Represents a tag expression that can be evaluated against a set of input tags.
+/// </summary>
+public interface ITagExpression
+{
+    /// <summary>
+    /// Evaluates the tag expression against the provided input tags.
+    /// </summary>
+    /// <param name="inputs">A collection of input tags to evaluate against.</param>
+    /// <returns><c>true</c> if the expression matches the inputs; otherwise, <c>false</c>.</returns>
+    bool Evaluate(IEnumerable<string> inputs);
+
+    /// <summary>
+    /// Returns the string representation of the tag expression.
+    /// </summary>
+    /// <returns>A string that represents the tag expression.</returns>
+    string ToString();
+}