- SF #962502: Add two more methods for unicode type; width() and

iswide() for east asian width manipulation. (Inspired by David
Goodger, Reviewed by Martin v. Loewis)
- Move _PyUnicode_TypeRecord.flags to the end of the struct so that
no padding is added for UCS-4 builds. (Suggested by Martin v. Loewis)

Lib/test/test_unicode.py

@@ -291,6 +291,26 @@ class UnicodeTest(
 
         self.assertRaises(TypeError, u"abc".isnumeric, 42)
 
+    def test_iswide(self):
+        self.checkequalnofix(False, u'', 'iswide')
+        self.checkequalnofix(False, u'\x1f', 'iswide') # Neutral
+        self.checkequalnofix(False, u'\x20', 'iswide') # Narrow
+        self.checkequalnofix(True, u'\u2329', 'iswide') # Wide
+        self.checkequalnofix(False, u'\uff64', 'iswide') # Half
+        self.checkequalnofix(True, u'\u3000', 'iswide') # Full
+        self.checkequalnofix(False, u'\u2460', 'iswide') # Ambiguous
+        self.checkequalnofix(True, u'\ud55c\uae00', 'iswide')
+        self.checkequalnofix(False, u'\ud55c\u2606\uae00', 'iswide')
+
+    def test_wide(self):
+        self.assertEqual(u''.width(), 0)
+        self.assertEqual(u'abcd'.width(), 4)
+        self.assertEqual(u'\u0187\u01c9'.width(), 2)
+        self.assertEqual(u'\u2460\u2329'.width(), 3)
+        self.assertEqual(u'\u2329\u2460'.width(), 3)
+        self.assertEqual(u'\ud55c\uae00'.width(), 4)
+        self.assertEqual(u'\ud55c\u2606\uae00'.width(), 5)
+
     def test_contains(self):
         # Testing Unicode contains method
         self.assert_('a' in u'abdb')