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 +1,36 @@
+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: |
+          pwd
+          ls -la
+          ls -la testdata/src
+      - run: dotnet test
+        working-directory: dotnet

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+### Added
+- [NET] Added .NET port
 
 ## [14.6.0] - 2025-10-27
 ### Added

CONTRIBUTING.md

@@ -8,6 +8,7 @@ This is a polyglot repo with several languages adhering to a common suite of acc
 
 - Java (reference)
 - JavaScript
+- C# (.NET)
 
 Java is the reference implementation in the sense that it is responsible for generating the fixtures that are used in the acceptance tests to verify all implementations.
 
@@ -22,12 +23,12 @@ So your playbook for adding a method would be something like:
 
 Choosing which type to use in another language based on what we did in Java is an inexact science. This table defines all the decisions we've made so far:
 
-| Java                | JavaScript              |
-|---------------------|-------------------------|
-| `Optional<T>`       | `T \| undefined`[^1]    |
-| `List<T>`           | `ReadonlyArray<T>`      | 
-| `Map<K, V>`         | `Map<K, V>`             | 
-| `Map<K, V>`         | `Record<K, V>`          | 
-| `List<Entry<T, V>>` | `ReadonlyArray<[T, V]>` |
+| Java                | JavaScript              | C#                      |
+|---------------------|-------------------------|-------------------------|
+| `Optional<T>`       | `T \| undefined`[^1]    | `T?`                    |
+| `List<T>`           | `ReadonlyArray<T>`      | `List<T>`               |
+| `Map<K, V>`         | `Map<K, V>`             | `Dictionary<K, V>`      |
+| `Map<K, V>`         | `Record<K, V>`          | `Dictionary<K, V>`      |
+| `List<Entry<T, V>>` | `ReadonlyArray<[T, V]>` | `List<Entry<T, V>>`     |
 
 [^1]: See <https://github.com/sindresorhus/meta/discussions/7>

dotnet/.editorconfig

@@ -0,0 +1,12 @@
+root=true
+
+[*]
+indent_style=space
+end_of_line=crlf
+charset=utf-8
+
+[*.{csproj,props}]
+indent_size=2
+
+[*.cs]
+indent_size=4

dotnet/.gitignore

@@ -0,0 +1,180 @@
+## 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/
+
+# ========================
+# Query project specific ignore settings
+Query/QueryTest/testdata/

dotnet/Directory.Build.props

@@ -0,0 +1,9 @@
+<Project>
+
+  <PropertyGroup>
+    <LangVersion>13</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+
+</Project>

dotnet/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Cucumber Ltd, Gaspar Nagy, Björn Rasmusson, Peter Sergeant, and contributors
+
+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/Query.sln

@@ -0,0 +1,36 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36221.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Query", "Query\Query.csproj", "{01EF081E-A17A-4630-9C7D-40BA4BE3F9BC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "QueryTest", "QueryTest\QueryTest.csproj", "{F0EA5832-C5B7-42CF-9BDB-6EE21C589C8B}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution ITems", "Solution ITems", "{02EA681E-C7D8-13C7-8484-4AC65E1B71E8}"
+	ProjectSection(SolutionItems) = preProject
+		Directory.Build.props = Directory.Build.props
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{01EF081E-A17A-4630-9C7D-40BA4BE3F9BC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{01EF081E-A17A-4630-9C7D-40BA4BE3F9BC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{01EF081E-A17A-4630-9C7D-40BA4BE3F9BC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{01EF081E-A17A-4630-9C7D-40BA4BE3F9BC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F0EA5832-C5B7-42CF-9BDB-6EE21C589C8B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F0EA5832-C5B7-42CF-9BDB-6EE21C589C8B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F0EA5832-C5B7-42CF-9BDB-6EE21C589C8B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F0EA5832-C5B7-42CF-9BDB-6EE21C589C8B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {923928DC-6FB0-4C25-9B2B-721A9B60C602}
+	EndGlobalSection
+EndGlobal

dotnet/Query/ILineageReducer.cs

@@ -0,0 +1,30 @@
+using Io.Cucumber.Messages.Types;
+
+namespace Io.Cucumber.Query
+{
+    public interface ILineageReducer<T>
+    {
+        T Reduce(Lineage lineage);
+
+        T Reduce(Lineage lineage, Pickle pickle);
+    }
+
+    public interface ICollector<T>
+    {
+        void Add(GherkinDocument document);
+
+        void Add(Feature feature);
+
+        void Add(Rule rule);
+
+        void Add(Scenario scenario);
+
+        void Add(Examples examples, int index);
+
+        void Add(TableRow example, int index);
+
+        void Add(Pickle pickle);
+
+        T Finish();
+    }
+}