#2592: delegate nb_index and the floor/truediv slots in weakref.proxy.

Lib/test/test_weakref.py

@@ -3,6 +3,7 @@ import sys
 import unittest
 import UserList
 import weakref
+import operator
 
 from test import test_support
 
@@ -187,6 +188,26 @@ class ReferencesTestCase(TestBase):
         self.assertEqual(L3[:5], p3[:5])
         self.assertEqual(L3[2:5], p3[2:5])
 
+    def test_proxy_index(self):
+        class C:
+            def __index__(self):
+                return 10
+        o = C()
+        p = weakref.proxy(o)
+        self.assertEqual(operator.index(p), 10)
+
+    def test_proxy_div(self):
+        class C:
+            def __floordiv__(self, other):
+                return 42
+            def __ifloordiv__(self, other):
+                return 21
+        o = C()
+        p = weakref.proxy(o)
+        self.assertEqual(p // 5, 42)
+        p //= 5
+        self.assertEqual(p, 21)
+
     # The PyWeakref_* C API is documented as allowing either NULL or
     # None as the value for the callback, where either means "no
     # callback".  The "no callback" ref and proxy objects are supposed
@@ -1059,7 +1080,7 @@ class WeakKeyDictionaryTestCase(mapping_tests.BasicTestMappingProtocol):
     def _reference(self):
         return self.__ref.copy()
 
-libreftest = """ Doctest for examples in the library reference: libweakref.tex
+libreftest = """ Doctest for examples in the library reference: weakref.rst
 
 >>> import weakref
 >>> class Dict(dict):

Misc/NEWS

@@ -36,6 +36,9 @@ Core and Builtins
 Extension Modules
 -----------------
 
+- Issue #2592: delegate nb_index and the floor/truediv slots in
+  weakref.proxy.
+
 - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
   platform.
 

Objects/weakrefobject.c

@@ -473,6 +473,8 @@ WRAP_BINARY(proxy_add, PyNumber_Add)
 WRAP_BINARY(proxy_sub, PyNumber_Subtract)
 WRAP_BINARY(proxy_mul, PyNumber_Multiply)
 WRAP_BINARY(proxy_div, PyNumber_Divide)
+WRAP_BINARY(proxy_floor_div, PyNumber_FloorDivide)
+WRAP_BINARY(proxy_true_div, PyNumber_TrueDivide)
 WRAP_BINARY(proxy_mod, PyNumber_Remainder)
 WRAP_BINARY(proxy_divmod, PyNumber_Divmod)
 WRAP_TERNARY(proxy_pow, PyNumber_Power)
@@ -492,6 +494,8 @@ WRAP_BINARY(proxy_iadd, PyNumber_InPlaceAdd)
 WRAP_BINARY(proxy_isub, PyNumber_InPlaceSubtract)
 WRAP_BINARY(proxy_imul, PyNumber_InPlaceMultiply)
 WRAP_BINARY(proxy_idiv, PyNumber_InPlaceDivide)
+WRAP_BINARY(proxy_ifloor_div, PyNumber_InPlaceFloorDivide)
+WRAP_BINARY(proxy_itrue_div, PyNumber_InPlaceTrueDivide)
 WRAP_BINARY(proxy_imod, PyNumber_InPlaceRemainder)
 WRAP_TERNARY(proxy_ipow, PyNumber_InPlacePower)
 WRAP_BINARY(proxy_ilshift, PyNumber_InPlaceLshift)
@@ -499,6 +503,7 @@ WRAP_BINARY(proxy_irshift, PyNumber_InPlaceRshift)
 WRAP_BINARY(proxy_iand, PyNumber_InPlaceAnd)
 WRAP_BINARY(proxy_ixor, PyNumber_InPlaceXor)
 WRAP_BINARY(proxy_ior, PyNumber_InPlaceOr)
+WRAP_UNARY(proxy_index, PyNumber_Index)
 
 static int
 proxy_nonzero(PyWeakReference *proxy)
@@ -623,6 +628,11 @@ static PyNumberMethods proxy_as_number = {
     proxy_iand,             /*nb_inplace_and*/
     proxy_ixor,             /*nb_inplace_xor*/
     proxy_ior,              /*nb_inplace_or*/
+    proxy_floor_div,        /*nb_floor_divide*/
+    proxy_true_div,         /*nb_true_divide*/
+    proxy_ifloor_div,       /*nb_inplace_floor_divide*/
+    proxy_itrue_div,        /*nb_inplace_true_divide*/
+    proxy_index,            /*nb_index*/
 };
 
 static PySequenceMethods proxy_as_sequence = {