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using System;

using System.Collections;

namespace Python.Runtime

{

/// <summary>

/// Implements a generic Python iterator for IEnumerable objects and

/// managed array objects. This supports 'for i in object:' in Python.

/// </summary>

internal class Iterator : ExtensionType

{

private IEnumerator iter;

public Iterator(IEnumerator e)

{

iter = e;

}

/// <summary>

/// Implements support for the Python iteration protocol.

/// </summary>

public static IntPtr tp_iternext(IntPtr ob)

{

var self = GetManagedObject(ob) as Iterator;

if (!self.iter.MoveNext())

{

Exceptions.SetError(Exceptions.StopIteration, Runtime.PyNone);

return IntPtr.Zero;

}

object item = self.iter.Current;

return Converter.ToPythonImplicit(item);

}

public static IntPtr tp_iter(IntPtr ob)

{

Runtime.XIncref(ob);

return ob;

}

}

}