mirror of https://github.com/python/cpython
60 lines
1.9 KiB
ReStructuredText
60 lines
1.9 KiB
ReStructuredText
.. highlight:: c
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.. _gen-objects:
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Generator Objects
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-----------------
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Generator objects are what Python uses to implement generator iterators. They
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are normally created by iterating over a function that yields values, rather
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than explicitly calling :c:func:`PyGen_New` or :c:func:`PyGen_NewWithQualName`.
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.. c:type:: PyGenObject
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The C structure used for generator objects.
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.. c:type:: PySendResult
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The enum value used to represent different results of :c:func:`PyGen_Send`.
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.. c:var:: PyTypeObject PyGen_Type
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The type object corresponding to generator objects.
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.. c:function:: int PyGen_Check(PyObject *ob)
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Return true if *ob* is a generator object; *ob* must not be ``NULL``.
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.. c:function:: int PyGen_CheckExact(PyObject *ob)
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Return true if *ob*'s type is :c:type:`PyGen_Type`; *ob* must not be ``NULL``.
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.. c:function:: PyObject* PyGen_New(PyFrameObject *frame)
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Create and return a new generator object based on the *frame* object.
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A reference to *frame* is stolen by this function. The argument must not be
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``NULL``.
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.. c:function:: PyObject* PyGen_NewWithQualName(PyFrameObject *frame, PyObject *name, PyObject *qualname)
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Create and return a new generator object based on the *frame* object,
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with ``__name__`` and ``__qualname__`` set to *name* and *qualname*.
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A reference to *frame* is stolen by this function. The *frame* argument
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must not be ``NULL``.
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.. c:function:: PySendResult PyGen_Send(PyGenObject *gen, PyObject *arg, PyObject **presult)
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Sends the *arg* value into the generator *gen*. Coroutine objects
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are also allowed to be as the *gen* argument but they need to be
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explicitly casted to PyGenObject*. Returns:
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- ``PYGEN_RETURN`` if generator returns. Return value is returned via *presult*.
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- ``PYGEN_NEXT`` if generator yields. Yielded value is returned via *presult*.
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- ``PYGEN_ERROR`` if generator has raised and exception. *presult* is set to ``NULL``.
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