/// <summary>
/// Creates PythonSuperType with a MRO list that starts with the next class in line in classType's MRO,
/// or searches classType's MRO for <see cref="typeToFind"/>, then builds an MRO list for
/// the remaining classes after <see cref="typeToFind"/>.
/// </summary>
/// <param name="classType"></param>
/// <param name="typeToFind"></param>
/// <returns></returns>
internal static PythonSuperType Create(IPythonClassType classType, IPythonType typeToFind = null)
{
var mro = classType?.Mro ?? Array.Empty <IPythonType>();
if (classType == null || mro.Count == 0)
{
return(null);
}
// skip doing work if the newStartType is the first element in the callers mro
if (typeToFind?.Equals(classType.Mro.FirstOrDefault()) == false)
{
var mroList = classType.Mro.ToList();
var start = mroList.FindIndex(0, t => t.Equals(typeToFind));
if (start >= 0)
{
mro = mroList.GetRange(start, mro.Count - start).ToArray();
}
else
{
return(null); // typeToFind wasn't in the mro
}
}
var nextClassInLine = mro?.FirstOrDefault();
var builtins = classType.DeclaringModule.Interpreter.ModuleResolution.BuiltinsModule;
// Skip the first element, super's search starts at the next element in the mro for both super() and super(cls, typeToFind)
return(nextClassInLine != null ? new PythonSuperType(mro.Skip(1).ToArray(), builtins) : null);
}
