BadInteropEnumerator.cs

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using System.Collections;
 
using BadScript2.Runtime.Error;
using BadScript2.Runtime.Interop.Functions;
using BadScript2.Runtime.Objects;
using BadScript2.Runtime.Objects.Types;
using BadScript2.Runtime.Objects.Types.Interface;
 
namespace BadScript2.Runtime.Interop;
 
public class BadInteropEnumerator : BadObject, IBadEnumerator
{
    private static readonly BadClassPrototype s_Prototype =
        new BadNativeClassPrototype<BadInteropEnumerator>("Enumerator",
                                                          (_, _) =>
                                                              throw new
                                                                  BadRuntimeException("Cannot call method on enumerator"
                                                                      ),
                                                          () => new[]
                                                          {
                                                              (BadInterfacePrototype)BadNativeClassBuilder
                                                                  .Enumerator.CreateGeneric(new[]
                                                                          {
                                                                              BadAnyPrototype.Instance,
                                                                          }
                                                                      ),
                                                          },
                                                          null
                                                         );
 
    private readonly BadObjectReference m_Current;
 
    private readonly IEnumerator<BadObject> m_Enumerator;
 
    private readonly BadObjectReference m_Next;
 
    public BadInteropEnumerator(IEnumerator<BadObject> enumerator)
    {
        m_Enumerator = enumerator;
 
        BadDynamicInteropFunction next = new BadDynamicInteropFunction("MoveNext",
                                                                       _ => m_Enumerator.MoveNext(),
                                                                       BadNativeClassBuilder.GetNative("bool")
                                                                      );
 
        BadDynamicInteropFunction current = new BadDynamicInteropFunction("GetCurrent",
                                                                          _ => m_Enumerator.Current,
                                                                          BadAnyPrototype.Instance
                                                                         );
 
        m_Next = BadObjectReference.Make("BadArrayEnumerator.MoveNext", (p) => next);
        m_Current = BadObjectReference.Make("BadArrayEnumerator.GetCurrent", (p) => current);
    }
 
#region IBadEnumerator Members
 
    public bool MoveNext()
    {
        return m_Enumerator.MoveNext();
    }
 
    public void Reset()
    {
        m_Enumerator.Reset();
    }
 
    public BadObject Current => m_Enumerator.Current!;
 
    object IEnumerator.Current => m_Enumerator.Current!;
 
    public void Dispose()
    {
        m_Enumerator.Dispose();
    }
 
#endregion
 
    public override BadClassPrototype GetPrototype()
    {
        return s_Prototype;
    }
 
    public override bool HasProperty(string propName, BadScope? caller = null)
    {
        return propName is "MoveNext" or "GetCurrent" ||
               base.HasProperty(propName, caller);
    }
 
    public override BadObjectReference GetProperty(string propName, BadScope? caller = null)
    {
        switch (propName)
        {
            case "MoveNext":
                return m_Next;
            case "GetCurrent":
                return m_Current;
        }
 
        return base.GetProperty(propName, caller);
    }
 
    public override string ToSafeString(List<BadObject> done)
    {
        return "InteropEnumerator";
    }
}