/// <summary>
/// Get or set values in the Object or Array or its' prototype.
/// </summary>
public MondValue this[MondValue index]
{
get
{
if (ReferenceEquals(index, null))
{
throw new ArgumentNullException(nameof(index));
}
if (Type == MondValueType.Array && (index.Type == MondValueType.Number || index.Type == MondValueType.Object))
{
var n = (int)index;
if (n < 0)
{
n += ArrayValue.Count;
}
if (n < 0 || n >= ArrayValue.Count)
{
throw new MondRuntimeException(RuntimeError.IndexOutOfBounds);
}
return(ArrayValue[n]);
}
MondValue indexValue;
if (Type == MondValueType.Object)
{
if (ObjectValue.Values.TryGetValue(index, out indexValue))
{
return(CheckWrapFunction(indexValue));
}
}
var i = 0;
var prototype = Prototype;
while (prototype != null)
{
var currentValue = prototype;
if (currentValue.Type != MondValueType.Object)
{
break;
}
var currentObjValue = currentValue.ObjectValue;
if (currentObjValue.Values.TryGetValue(index, out indexValue))
{
return(CheckWrapFunction(indexValue));
}
prototype = currentValue.Prototype;
i++;
if (i > 100)
{
throw new MondRuntimeException(RuntimeError.CircularPrototype);
}
}
if (Type == MondValueType.Object)
{
if (TryDispatch("__get", out indexValue, this, index))
{
return(CheckWrapFunction(indexValue));
}
}
return(Undefined);
}
set
{
if (ReferenceEquals(index, null))
{
throw new ArgumentNullException(nameof(index));
}
if (ReferenceEquals(value, null))
{
throw new ArgumentNullException(nameof(value));
}
if (Type == MondValueType.Array && (index.Type == MondValueType.Number || index.Type == MondValueType.Object))
{
var n = (int)index;
if (n < 0)
{
n += ArrayValue.Count;
}
if (n < 0 || n >= ArrayValue.Count)
{
throw new MondRuntimeException(RuntimeError.IndexOutOfBounds);
}
ArrayValue[n] = value;
return;
}
if (Type == MondValueType.Object && ObjectValue.Values.ContainsKey(index))
{
if (ObjectValue.Locked)
{
throw new MondRuntimeException(RuntimeError.ObjectIsLocked);
}
ObjectValue.Values[index] = value;
return;
}
var i = 0;
var prototype = Prototype;
while (prototype != null)
{
var currentValue = prototype;
if (currentValue.Type != MondValueType.Object)
{
break;
}
var values = currentValue.ObjectValue.Values;
if (values.ContainsKey(index))
{
if (currentValue.ObjectValue.Locked)
{
break; // hit a wall in the prototype chain, don't continue
}
values[index] = value;
return;
}
prototype = currentValue.Prototype;
i++;
if (i > 100)
{
throw new MondRuntimeException(RuntimeError.CircularPrototype);
}
}
if (Type != MondValueType.Object)
{
throw new MondRuntimeException(RuntimeError.CantCreateField, Type.GetName());
}
if (ObjectValue.Locked)
{
throw new MondRuntimeException(RuntimeError.ObjectIsLocked);
}
if (TryDispatch("__set", out var _, this, index, value))
{
return;
}
ObjectValue.Values[index] = value;
}
}
private static void UnsupportedMondTypeError( MondValueType type )
{
throw new NotSupportedException( "Unsupported MondValueType '{0}'".With( type.GetName() ) );
}
private static void UnsupportedMondTypeError(MondValueType type) => throw new NotSupportedException(
$"Unsupported MondValueType '{type.GetName()}'");