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-rw-r--r--doc/source/reference/c-api/types-and-structures.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/source/reference/c-api/types-and-structures.rst b/doc/source/reference/c-api/types-and-structures.rst
index 75a97c20e..43d1eccb7 100644
--- a/doc/source/reference/c-api/types-and-structures.rst
+++ b/doc/source/reference/c-api/types-and-structures.rst
@@ -818,6 +818,7 @@ PyUFunc_Type and PyUFuncObject
npy_intp *core_dim_sizes;
npy_uint32 *core_dim_flags;
PyObject *identity_value;
+ /* Further private slots (size depends on the NumPy version) */
} PyUFuncObject;
.. c:macro: PyObject_HEAD
@@ -957,6 +958,12 @@ PyUFunc_Type and PyUFuncObject
.. c:member:: PyUFunc_LegacyInnerLoopSelectionFunc *legacy_inner_loop_selector
+ .. note::
+
+ Some fallback support for this slot exists, but it should not be
+ called and not be used in the future.
+ See ref:`NEP 41 <NEP41>` and ref:`NEP 43 <NEP43>`
+
A function which returns an inner loop. The ``legacy`` in the name arises
because for NumPy 1.6 a better variant had been planned. This variant
has not yet come about.