Add NativeAOT support (#1)

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).

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;

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
+    {
+    }
+}

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>