From 89a2e353a48c1c6f8dd80196b2ee672b0c2b0d14 Mon Sep 17 00:00:00 2001
From: pableess <8421069+pableess@users.noreply.github.com>
Date: Sun, 13 Sep 2026 22:29:03 -0500
Subject: [PATCH] Add NativeAOT support (#1)

* Add NativeAOT support

Use a source-generated TomlSerializerContext for the internal TomlTable
deserialization instead of the reflection-based overload. Reflection-based
TOML serialization is disabled by default under PublishAot=true, which made
the previous call fail at runtime and emit IL2026/IL3050 warnings.

- Add internal TomlModelSerializerContext with [TomlSerializable(typeof(TomlTable))]
- Parse via TomlSerializer.Deserialize<TomlTable>(text, context)
- Mark the library IsAotCompatible and bump Tomlyn to 2.10.1
- Add a NativeAOT smoke-test project and CI workflow (test + AOT publish/run)

* removed test projects

* remove test project and ci build

---------

Co-authored-by: Paul <paulb@desktop.lan>
---
 README.md                                     | 22 +++++++++++++++++++
 .../TomlConfigurationFileParser.cs            |  2 +-
 .../TomlModelSerializerContext.cs             | 10 +++++++++
 .../Tomlyn.Extensions.Configuration.csproj    |  3 ++-
 4 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 Tomlyn.Extensions.Configuration/TomlModelSerializerContext.cs

diff --git a/README.md b/README.md
index 31afbac..aa951bf 100644
--- a/README.md
+++ b/README.md
@@ -106,6 +106,28 @@ config.Bind(sample);
 
 If using 'snake_case' keys, YOU MUST make sure that your C# variables are 'PascalCase' to ensure proper binding. 
 
+## NativeAOT
+
+This library is annotated as NativeAOT compatible (`IsAotCompatible`) and has no runtime reflection dependencies. TOML parsing goes through a source-generated Tomlyn `TomlSerializerContext`, so it works when reflection-based serialization is disabled (`PublishAot=true`).
+
+When publishing with `PublishAot=true`, avoid reflection-based configuration binding:
+
+```cs
+// Not AOT safe
+configuration.Bind(options);
+
+// AOT safe
+var value = configuration["Server:Port"];
+```
+
+To bind values to strongly typed options under NativeAOT, opt into the configuration binder source generator:
+
+```xml
+<PropertyGroup>
+  <EnableConfigurationBindingGenerator>true</EnableConfigurationBindingGenerator>
+</PropertyGroup>
+```
+
 ## Alternatives and benchmarks
 
 Another [possibly slightly faster](https://github.com/bugproof/TomlLibrariesBenchmark) alternative is [Tommy.Extensions.Configuration](https://github.com/dezhidki/Tommy/tree/master/Tommy.Extensions.Configuration).
diff --git a/Tomlyn.Extensions.Configuration/TomlConfigurationFileParser.cs b/Tomlyn.Extensions.Configuration/TomlConfigurationFileParser.cs
index 23f2659..e859680 100644
--- a/Tomlyn.Extensions.Configuration/TomlConfigurationFileParser.cs
+++ b/Tomlyn.Extensions.Configuration/TomlConfigurationFileParser.cs
@@ -20,7 +20,7 @@ public static IDictionary<string, string> Parse(Stream input)
         private IDictionary<string, string> ParseStream(Stream input)
         {
             using var reader = new StreamReader(input);
-            var model = TomlSerializer.Deserialize<TomlTable>(reader.ReadToEnd())
+            var model = TomlSerializer.Deserialize<TomlTable>(reader.ReadToEnd(), TomlModelSerializerContext.Default)
                 ?? throw new FormatException("TOML deserialization returned null");
             VisitObject(model);
             return _data;
diff --git a/Tomlyn.Extensions.Configuration/TomlModelSerializerContext.cs b/Tomlyn.Extensions.Configuration/TomlModelSerializerContext.cs
new file mode 100644
index 0000000..4fdbf88
--- /dev/null
+++ b/Tomlyn.Extensions.Configuration/TomlModelSerializerContext.cs
@@ -0,0 +1,10 @@
+using Tomlyn.Model;
+using Tomlyn.Serialization;
+
+namespace Tomlyn.Extensions.Configuration
+{
+    [TomlSerializable(typeof(TomlTable))]
+    internal partial class TomlModelSerializerContext : TomlSerializerContext
+    {
+    }
+}
diff --git a/Tomlyn.Extensions.Configuration/Tomlyn.Extensions.Configuration.csproj b/Tomlyn.Extensions.Configuration/Tomlyn.Extensions.Configuration.csproj
index 3ca6822..99915a4 100644
--- a/Tomlyn.Extensions.Configuration/Tomlyn.Extensions.Configuration.csproj
+++ b/Tomlyn.Extensions.Configuration/Tomlyn.Extensions.Configuration.csproj
@@ -11,11 +11,12 @@
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
         <LangVersion>default</LangVersion>
+        <IsAotCompatible>true</IsAotCompatible>
     </PropertyGroup>
 
     <ItemGroup>
       <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="10.0.6" />
-      <PackageReference Include="Tomlyn" Version="2.3.0" />
+      <PackageReference Include="Tomlyn" Version="2.10.1" />
     </ItemGroup>
 
 </Project>