[pypy-commit] pypy default: cpyext: add PyObject_HashNotImplemented

amauryfa noreply at buildbot.pypy.org
Sun Apr 22 18:17:41 CEST 2012

Author: Amaury Forgeot d'Arc <amauryfa at gmail.com>
Changeset: r54618:2829e1f34ab8
Date: 2012-04-21 22:18 +0200

Log:	cpyext: add PyObject_HashNotImplemented

diff --git a/pypy/module/cpyext/object.py b/pypy/module/cpyext/object.py
--- a/pypy/module/cpyext/object.py
+++ b/pypy/module/cpyext/object.py
@@ -381,6 +381,15 @@
     This is the equivalent of the Python expression hash(o)."""
     return space.int_w(space.hash(w_obj))
+ at cpython_api([PyObject], lltype.Signed, error=-1)
+def PyObject_HashNotImplemented(space, o):
+    """Set a TypeError indicating that type(o) is not hashable and return -1.
+    This function receives special treatment when stored in a tp_hash slot,
+    allowing a type to explicitly indicate to the interpreter that it is not
+    hashable.
+    """
+    raise OperationError(space.w_TypeError, space.wrap("unhashable type"))
 @cpython_api([PyObject], PyObject)
 def PyObject_Dir(space, w_o):
     """This is equivalent to the Python expression dir(o), returning a (possibly

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