VarDump extensibility with IKnownObjectVisitor

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using VarDump;
using VarDump.CodeDom.Compiler;
using VarDump.Visitor;

// For more examples see https://github.com/ycherkes/VarDump/blob/main/test/VarDump.UnitTests/KnownObjectsSpec.cs

const string name = "World";
FormattableString str = $"Hello, {name}";

var options = new DumpOptions
{
    ConfigureKnownObjects = (knownObjects, nextDepthVisitor, _, codeWriter) =>
    {
        knownObjects.Add(new FormattableStringVisitor(nextDepthVisitor, codeWriter));
    }
};

var dumper = new CSharpDumper(options);
var result = dumper.Dump(str);
Console.WriteLine(result);

return;

class FormattableStringVisitor(INextDepthVisitor nextDepthVisitor, ICodeWriter codeWriter) : IKnownObjectVisitor
{
	public string Id => nameof(FormattableString);

	public bool IsSuitableFor(object obj, Type objectType)
	{
		return obj is FormattableString;
	}

	public void ConfigureOptions(Action<DumpOptions> configure)
	{
	}

	public void Visit(object obj, Type objectType, VisitContext context)
	{
		var formattableString = (FormattableString)obj;

		IEnumerable<Action> arguments =
		[
			() => codeWriter.WritePrimitive(formattableString.Format)
		];

		arguments = arguments.Concat(formattableString.GetArguments().Select(a => (Action)(() => nextDepthVisitor.Visit(a, context))));

		codeWriter.WriteMethodInvoke(() =>
			codeWriter.WriteMethodReference(
				() => codeWriter.WriteType(typeof(FormattableStringFactory)),
				nameof(FormattableStringFactory.Create)),
			arguments);
	}
}