Value Object Source Generator

A C# Roslyn source generator that auto-generates immutable, strongly-typed Value Object implementations from simple struct declarations.

• Automatically generates code from partial struct or partial record struct declarations decorated with [ValueObject] or [MultiValueObject] attributes
• Creates single-value wrappers (e.g., ProductId wrapping a Guid) and multi-value objects (structs with multiple properties)
• Ensures immutability and value-based equality comparison by default
• Supports optional features like parsing, implicit conversions, deconstruction, and custom validation
• Supports Json serialization, both System.Text.Json and Newtonsoft.Json
• Reduces boilerplate code while maintaining strong typing and compile-time safety
• Licensed under LGPL v2.1

The goal of this project is to provide a library that is simple to use and good (enough) for most cases.

Value Object

Add the Jacobi.ValueObject (NuGet) package to your project to get started.

Read more on how to use the Value Object generator in this readme.

Solution

• Jacobi.ValueObject contains the ValueObject code attribute and related types.
• Jacobi.ValueObject.Generator contains the Roslyn Source Code Generator that creates the Value Object implementation.
• Jacobi.ValueObject.Tests contains test code to excercise the various states and conditions for the Value Object implementation.