Support required modifier

[Corniel]

It would be nice if the required modifier could be considered a way of making properties required. You could think of the following:

class Model
{
    public required string MakeRequired { get; init; } // When analyzing this property, add a default instance of a RequiredAttribute to the list of validation attributes/

    public required int ValueType { get; init; } // Ignore, adding a required attribute will not change a thing.
  
    public required string? NullableReference { get; init; } // Ingore, it must be set, but null is considered valid option.

    [Any]
    public required int[] SomeObject { get; init; } // Ignore, AnyAttribute inherits from RequiredAttribute and should prevail.
}

What do you think?

[lamereactor]

@Corniel Here’s my attempt at handling the required modifier : lamereactor@7d7871c. Hope this helps!

[Corniel]

@lamereactor This was my attempt.

 var attributes = GetCustomAttributes().Select(a => a.GetType());

        return attributes.Any(a => a.FullName == "System.Runtime.CompilerServices.RequiredMemberAttribute")
            && !attributes.Any(a => a.FullName == "System.Runtime.CompilerServices.NullableAttribute")
            ? RequiredMember
            : null;

see https://github.com/Qowaiv/qowaiv-validation/blob/main/src/Qowaiv.Validation.DataAnnotations/Reflection/Member.cs