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Andreu

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•Created by Andreu on 7/12/2023 in #technical-questions

Create NuGet with Metalama

With source generators I have to add some MSBuild configuration, but with Metalama it seems I don't need it. My goal is to create a fabric that detects classes inheriting from BusinessException, and then apply an attribute/aspect to it, generating code. Then I'll publish a NuGet to nuget.org, and when I create it (dotnet build & pack), I'll pass the license key with an envinroment variable to MSBuild. And... just that? Will library users have to specify a license key? Do I have to publish the NuGet as an analyzer? Anything? Will they have Metalama code generation out-of-the-box inheriting from BusinessException? Thanks!

10 replies

MCMetalama Community

•Created by Andreu on 7/12/2023 in #technical-questions

Override property with BuildAspect

I create exceptions inheriting from Exception and putting the [BusinessException] attribute. I want to override the Message property using string.Format with the primary constructor parameters. For example, the next class:

[BusinessException]
public class UserAlreadyExistsException(int age, string email) : Exception;

[BusinessException]
public class UserAlreadyExistsException(int age, string email) : Exception;

I started with [Introduce], but later I noticed I need BuildAspect to access constructors. I've tried with this, but I don't know how to do complete the code. The goal is to have: string.Format("The user with age {0} and email {1} already exists", age, email); Code: https://try.metalama.net/#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-CWOCAxYcCTEK9widT7VZ6vypiDg8iI9qBkX6wmAEiioQdJLLWe5-pwlIMDB7gAZ+8o5t+Kanl2MhWCc-yFrM8xWIsbBDucYRLCh6EYRWsg4XhTyuq8Sz1hujboMOoSGpRqK2rCtosuQICSIgHAgCyHwskAA

6 replies

MCMetalama Community

•Created by Andreu on 7/12/2023 in #technical-questions

View diff in Rider

I don't use Visual Studio, and overall, I don't have Windows. Is there any way to see the source generated by Metalama? With source generators I could see the source in the IDE, but with Metalama I can't.

4 replies

MCMetalama Community

•Created by Andreu on 7/12/2023 in #technical-questions

Override constructor

Is it possible to override a constructor? I want to take my code:

public class BusinessException
{
  public BusinessException(int age)
  {
  }
}

public class BusinessException
{
  public BusinessException(int age)
  {
  }
}

and translate it to:

public class BusinessException
{
  private int age;

  public BusinessException(int age)
  {
    this.age = age;
  }
}

public class BusinessException
{
  private int age;

  public BusinessException(int age)
  {
    this.age = age;
  }
}

In the example, I add a private field age, but if it's not possible it's ok, I'll be happy with just overriding the constructor

2 replies

MCMetalama Community

•Created by Andreu on 7/11/2023 in #technical-questions

Does Metalama only support attributes?

I navigated in all Metalama documentation, but I want to override a method for all types that inherit from BusinessException. I don't want to use attributes because for my use case it's more natural to extend from a class.

4 replies

MCMetalama Community

•Created by Andreu on 7/11/2023 in #technical-questions

Can Metalama suppress compiler errors?

Hello! I want to know if I can use Metalama in my library. The users of my library have to declare the next class with this inheritance: public class EmailAlreadyExists(string email) : BusinessException("{0} already exists") So, with Metalama I can replace the parameter email in the message with the placeholder. For example, with: ... : BusinessException(string.Format("{0} already exists", email)) But most of developers will have <TreatWarningsAsErrors>true</TreatWarningsAsErrors>, so they'll get compiler errors because they don't use the parameter email, even if it's used with Metalama. Is this correct? Originally my intention was to use source generators, but I don't want to plague all their code with partial.

2 replies

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