/// <summary>
/// Implements the default __reduce_ex__ method as specified by PEP 307 case 2 (new-style instance, protocol 0 or 1)
/// </summary>
internal static PythonTuple ReduceProtocol0(CodeContext /*!*/ context, object self)
{
// CPython implements this in copy_reg._reduce_ex
PythonType myType = DynamicHelpers.GetPythonType(self); // PEP 307 calls this "D"
ThrowIfNativelyPickable(myType);
object getState;
bool hasGetState = PythonOps.TryGetBoundAttr(context, self, "__getstate__", out getState);
object slots;
if (PythonOps.TryGetBoundAttr(context, myType, "__slots__", out slots) && PythonOps.Length(slots) > 0 && !hasGetState)
{
// ??? does this work with superclass slots?
throw PythonOps.TypeError("a class that defines __slots__ without defining __getstate__ cannot be pickled with protocols 0 or 1");
}
PythonType closestNonPythonBase = FindClosestNonPythonBase(myType); // PEP 307 calls this "B"
object func = context.LanguageContext.PythonReconstructor;
object funcArgs = PythonTuple.MakeTuple(
myType,
closestNonPythonBase,
TypeCache.Object == closestNonPythonBase ? null : PythonCalls.Call(context, closestNonPythonBase, self)
);
object state;
if (hasGetState)
{
state = PythonOps.CallWithContext(context, getState);
}
else
{
IPythonObject ipo = self as IPythonObject;
if (ipo != null)
{
state = ipo.Dict;
}
else if (!PythonOps.TryGetBoundAttr(context, self, "__dict__", out state))
{
state = null;
}
}
if (!PythonOps.IsTrue(state))
{
state = null;
}
return(PythonTuple.MakeTuple(func, funcArgs, state));
}
public static object __ne__(CodeContext context, object self, object other)
{
if (PythonTypeOps.TryInvokeBinaryOperator(context, self, other, "__eq__", out object res))
{
if (res is NotImplementedType)
{
return(NotImplementedType.Value);
}
return(!PythonOps.IsTrue(res));
}
return(NotImplementedType.Value);
}
public static bool __new__(object cls, object o)
{
return(PythonOps.IsTrue(o));
}
