implement len(unicode) for PEP 393

--HG--
extra : rebase_source : 211fa0c1058750151e3524d4ca5854a86ed5289f

Cython/Compiler/ModuleNode.py

@@ -578,6 +578,13 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
   #define Py_TPFLAGS_HAVE_NEWBUFFER 0
 #endif
 
+/* new Py3.3 unicode representation (PEP 393) */
+#ifdef PyUnicode_GET_LENGTH
+  #define __Pyx_PyUnicode_GET_LENGTH PyUnicode_GET_LENGTH
+#else
+  #define __Pyx_PyUnicode_GET_LENGTH PyUnicode_GET_SIZE
+#endif
+
 #if PY_MAJOR_VERSION >= 3
   #define PyBaseString_Type            PyUnicode_Type
   #define PyStringObject               PyUnicodeObject

Cython/Compiler/Optimize.py

@@ -2037,7 +2037,7 @@ class OptimizeBuiltinCalls(Visitor.EnvTransform):
             ])
 
     _map_to_capi_len_function = {
-        Builtin.unicode_type   : "PyUnicode_GET_SIZE",
+        Builtin.unicode_type   : "__Pyx_PyUnicode_GET_LENGTH",
         Builtin.bytes_type     : "PyBytes_GET_SIZE",
         Builtin.list_type      : "PyList_GET_SIZE",
         Builtin.tuple_type     : "PyTuple_GET_SIZE",