Book Image

Metaprogramming in C#

By : Einar Ingebrigtsen
Book Image

Metaprogramming in C#

By: Einar Ingebrigtsen

Overview of this book

Metaprogramming is an advanced technique that helps developers to automate repetitive tasks, generate scalable code, and enhance productivity in software development. Metaprogramming in C# is a comprehensive guide that will help you reap the full potential of metaprogramming in .NET runtime. You’ll start by learning about the .NET runtime environment and how you can use it to become a more productive developer. You'll learn how to infer types using reflection, use attributes, and create dynamic proxies. You’ll also explore the use of expressions to create and execute code and how to take advantage of Dynamic Language Runtime. But that's not all! You’ll also learn to go beyond inheritance and use method signature conventions to create easily maintainable code. Finally, you’ll dive into the world of compiler magic with Roslyn, where you'll discover how to use Roslyn to generate code, perform static code analysis, and write your own compiler extensions. By the end of this book, you’ll have a deep understanding of metaprogramming concepts and how to apply them to your C# code. You’ll be able to think about types, use attributes and expressions to generate code, and apply crosscutting concerns to improve code quality.
Table of Contents (25 chapters)
1
Part 1:Why Metaprogramming?
5
Part 2:Leveraging the Runtime
12
Part 3:Increasing Productivity, Consistency, and Quality
18
Part 4:Compiler Magic Using Roslyn

Code fix tests

As with the analyzer, you can create tests specific to code fixes. It uses a different verifier than the analyzer: CodeFixVerifier. Let’s get started:

  1. Add a file called CodeFixTests within the ExceptionShouldNotBeSuffixed folder in the Roslyn.Extensions.Test project folder. Then add a file called CodeFixTests.cs and add the following content to it:
    namespace Roslyn.Extensions.CodeAnalysis
      .ExceptionShouldNotBeSuffixed;
    using Xunit;
    using Verify = Microsoft.CodeAnalysis.Csharp
      .Testing.XUnit.CodeFixVerifier<Analyzer, CodeFix>;
    public class CodeFixTests
    {
    }

As you did with the analyzer tests, you used a verifier. For code fixes, it is a different type of verifier: CodeFixVerifier.

The CodeFixVerifier verifier needs two generic arguments, the first one representing the analyzer and the second representing the code fix being tested.

  1. Add the following test method to the CodeFixTests class:
    [Fact]
    public async Task...