Bits of .NET

⚡ Source Generators = Build-Time Magic

Runtime reflection yavaştır. C# Source Generators ile build-time code generation yapın.

🎯 Source Generator Implementation

[Generator]
public class HelloSourceGenerator : ISourceGenerator
{
    public void Initialize(GeneratorInitializationContext context)
    {
        // No initialization needed
    }

    public void Execute(GeneratorExecutionContext context)
    {
        // 1. Source Code Generation
        var source = @"
        namespace Generated
        {
            public static class HelloWorld
            {
                public static string SayHello() => "Hello from Source Generator!";
            }
        }";

        context.AddSource("HelloWorld.g.cs", source);

        // 2. Attribute-Based Generation
        foreach (var type in context.Compilation.SyntaxTrees)
        {
            // Parse and generate
        }
    }
}

// 3. Using Generated Code
var message = Generated.HelloWorld.SayHello();
Console.WriteLine(message); // Hello from Source Generator!

// 4. Attribute Example
[AttributeUsage(AttributeTargets.Class)]
public class GenerateToStringAttribute : Attribute { }

[GenerateToString]
public partial class User
{
    public string Name { get; set; }
    public int Age { get; set; }
}

// Generated code: partial class User with ToString override

✅ Source Generator Kullanım Alanları

• ✓ Auto-generated DTO’lar
• ✓ Serialization code
• ✓ Database mapping
• ✓ Dependency injection registration
• ✓ Performance-critical code