Empty line in comments

[imclint21]

Hi,

I try to generate an empty line using ChainedObjectGraphVisitor, but does not works, any idea how to accomplish this?

I also tried to use [YamlMember(Description = "\nGeneral configuration")] but don't work either.

public override bool EnterMapping(IPropertyDescriptor key, IObjectDescriptor value, IEmitter context)
{
    context.Emit(new Scalar(""));
    context.Emit(new Comment("Comment", false));
    return base.EnterMapping(key, value, context);
}

Regards

[EdwardCooke]

You would need to create your own Emitter that inherits the current emitter and expose the text writer and use that to output the new line. Here's an example:

using YamlDotNet.Core;
using YamlDotNet.Serialization;
using YamlDotNet.Serialization.EventEmitters;

var serializer = new SerializerBuilder().WithEventEmitter((emitter) => new TestChainedEmitter(emitter), (registration)=>registration.OnTop()).Build();

var data = new List<TestClass>
{
    new TestClass() { Name = "name 1", Description = "description 1" },
    new TestClass() { Name = "name 2", Description = "description 2" }
};

var stringWriter = new StringWriter();
var emitterSettings = new EmitterSettings();
var myEmitter = new MyEmitter(stringWriter, emitterSettings);

serializer.Serialize(myEmitter, data);
Console.WriteLine(stringWriter.ToString());

class TestClass
{
    public string Name { get; set; }
    public string Description { get; set; }
}

class TestChainedEmitter : ChainedEventEmitter
{
    public TestChainedEmitter(IEventEmitter nextEmitter) : base(nextEmitter)
    {
    }
    public override void Emit(MappingStartEventInfo eventInfo, IEmitter emitter)
    {
        (emitter as MyEmitter)?.Output.WriteLine();

        base.Emit(eventInfo, emitter);
    }
}

class MyEmitter : Emitter
{
    public TextWriter Output { get; }

    public MyEmitter(TextWriter output) : base(output)
    {
        Output = output;
    }

    public MyEmitter(TextWriter output, int bestIndent) : base(output, bestIndent)
    {
        Output = output;
    }

    public MyEmitter(TextWriter output, EmitterSettings settings) : base(output, settings)
    {
        Output = output;
    }

    public MyEmitter(TextWriter output, int bestIndent, int bestWidth) : base(output, bestIndent, bestWidth)
    {
        Output = output;
    }

    public MyEmitter(TextWriter output, int bestIndent, int bestWidth, bool isCanonical) : base(output, bestIndent, bestWidth, isCanonical)
    {
        Output = output;
    }
}

Outputs:

- Name: name 1
  Description: description 1

- Name: name 2
  Description: description 2