'How to serialize list or array using MetaLama in ToString TypeAspect

I am trying to write an TypeAspect using MetaLama framwerok that will serialize an object to it's string representation when it has a nested list type. Here is what I tried :

public class ToStringAttribute : TypeAspect
    {
        [Introduce(WhenExists = OverrideStrategy.Override, Name = "ToString")]
        public string IntroducedToString()
        {
            var stringBuilder = new InterpolatedStringBuilder();
            stringBuilder.AddText(meta.Target.Type.Name);
            stringBuilder.AddText(" ");

            var fields = meta.Target.Type.FieldsAndProperties.Where(f => !f.IsStatic)
                                                             .ToList();

            var i = meta.CompileTime(0);

            stringBuilder.AddText("{ ");
            foreach (var field in fields)
            {
                if (i > 0)
                {
                    stringBuilder.AddText(", ");
                }

                stringBuilder.AddText(field.Name);
                stringBuilder.AddText(" : ");
                if (field.Type.ToType() == typeof(string))
                {
                    stringBuilder.AddText("'");
                    stringBuilder.AddExpression(field.Invokers.Final.GetValue(meta.This));
                    stringBuilder.AddText("'");
                }
                else if ((field.Type.ToType().IsArray || field.Type.ToType().IsCollectible) && !field.Type.ToType().IsPrimitive) // <- not filtering collection types
                {
                    stringBuilder.AddText("[");
                    //foreach (var item in meta.Target.Type.FieldsAndProperties.Where(p => p.Type.ToType().IsCollectible)) <- I need the collection type properties
                    //{
                    //stringBuilder.AddExpression(item);
                    //stringBuilder.AddText(" : ");
                    //stringBuilder.AddExpression(item.Value);
                    //}
                    stringBuilder.AddText("]");
                }
                else
                {
                    stringBuilder.AddExpression(field.Invokers.Final.GetValue(meta.This));
                }

                i++;
            }
            stringBuilder.AddText(" }");

            return stringBuilder.ToValue();
        }
    }
}

Anyone can help? Am new with MetaLama, but I found it very interesting. thnx

c++sharpmetalama


Solution 1:[1]

This code will check if a type is enumerable:

var returnsEnumerable =
 type is INamedType namedType 
  && !type.Is( SpecialType.String )
  && namedType.AllImplementedInterfaces.Any( i => i.Name == "IEnumerable" );

You can try it online:

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Gael Fraiteur

Related Questions