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bpo-40273: Reversible mappingproxy (FH-19513)

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Zackery Spytz 2020-05-07 23:25:50 -06:00 • committed by GitHub
parent db9163ceef
commit 02fa0ea9c1
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4 changed files with 25 additions and 0 deletions
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9
Objects/descrobject.c
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@ -1118,6 +1118,13 @@ mappingproxy_copy(mappingproxyobject *pp, PyObject *Py_UNUSED(ignored))
return _PyObject_CallMethodIdNoArgs(pp->mapping, &PyId_copy);
}
static PyObject *
mappingproxy_reversed(mappingproxyobject *pp, PyObject *Py_UNUSED(ignored))
{
_Py_IDENTIFIER(__reversed__);
return _PyObject_CallMethodIdNoArgs(pp->mapping, &PyId___reversed__);
}
/* WARNING: mappingproxy methods must not give access
to the underlying mapping */
@ -1135,6 +1142,8 @@ static PyMethodDef mappingproxy_methods[] = {
PyDoc_STR("D.copy() -> a shallow copy of D")},
{"__class_getitem__", (PyCFunction)Py_GenericAlias, METH_O|METH_CLASS,
PyDoc_STR("See PEP 585")},
{"__reversed__", (PyCFunction)mappingproxy_reversed, METH_NOARGS,
PyDoc_STR("D.__reversed__() -> reverse iterator")},
{0}
};