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pythonnet/src/runtime/pyiter.cs at master · sdpython/pythonnet · GitHub
This repository was archived by the owner on Jul 22, 2023. It is now read-only.
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runtime
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pyiter.cs
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using
System
;
using
System
.
Collections
.
Generic
;
namespace
Python
.
Runtime
{
/// <summary>
/// Represents a standard Python iterator object. See the documentation at
/// PY2: https://docs.python.org/2/c-api/iterator.html
/// PY3: https://docs.python.org/3/c-api/iterator.html
/// for details.
/// </summary>
public
class
PyIter
:
PyObject
,
IEnumerator
<
PyObject
>
{
private
PyObject
_current
;
/// <summary>
/// PyIter Constructor
/// </summary>
/// <remarks>
/// Creates a new PyIter from an existing iterator reference. Note
/// that the instance assumes ownership of the object reference.
/// The object reference is not checked for type-correctness.
/// </remarks>
public
PyIter
(
IntPtr
ptr
)
:
base
(
ptr
)
{
}
/// <summary>
/// PyIter factory function.
/// </summary>
/// <remarks>
/// Create a new PyIter from a given iterable. Like doing "iter(iterable)" in python.
/// </remarks>
/// <param name="iterable"></param>
/// <returns></returns>
public
static
PyIter
GetIter
(
PyObject
iterable
)
{
if
(
iterable
==
null
)
{
throw
new
ArgumentNullException
(
)
;
}
IntPtr
val
=
Runtime
.
PyObject_GetIter
(
iterable
.
obj
)
;
PythonException
.
ThrowIfIsNull
(
val
)
;
return
new
PyIter
(
val
)
;
}
protected
override
void
Dispose
(
bool
disposing
)
{
_current
=
null
;
base
.
Dispose
(
disposing
)
;
}
public
bool
MoveNext
(
)
{
NewReference
next
=
Runtime
.
PyIter_Next
(
Reference
)
;
if
(
next
.
IsNull
(
)
)
{
if
(
Exceptions
.
ErrorOccurred
(
)
)
{
throw
new
PythonException
(
)
;
}
// stop holding the previous object, if there was one
_current
=
null
;
return
false
;
}
_current
=
next
.
MoveToPyObject
(
)
;
return
true
;
}
public
void
Reset
(
)
{
throw
new
NotSupportedException
(
)
;
}
public
PyObject
Current
=>
_current
;
object
System
.
Collections
.
IEnumerator
.
Current
=>
_current
;
}
}
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