#13899: \A, \Z, and \B now correctly match the A, Z, and B literals when used inside character classes (e.g. [A]). Patch by Matthew Barnett.
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py
index 7149dca..8b98b1a 100644
--- a/Lib/sre_parse.py
+++ b/Lib/sre_parse.py
@@ -228,7 +228,7 @@
if code:
return code
code = CATEGORIES.get(escape)
- if code:
+ if code and code[0] == IN:
return code
try:
c = escape[1:2]
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index 70702e6..dee5efe 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -821,6 +821,12 @@
# Test behaviour when not given a string or pattern as parameter
self.assertRaises(TypeError, re.compile, 0)
+ def test_bug_13899(self):
+ # Issue #13899: re pattern r"[\A]" should work like "A" but matches
+ # nothing. Ditto B and Z.
+ self.assertEqual(re.findall(r'[\A\B\b\C\Z]', 'AB\bCZ'),
+ ['A', 'B', '\b', 'C', 'Z'])
+
@precisionbigmemtest(size=_2G, memuse=1)
def test_large_search(self, size):
# Issue #10182: indices were 32-bit-truncated.
diff --git a/Misc/ACKS b/Misc/ACKS
index 41c684f..c185689 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -58,6 +58,7 @@
Anton Barkovsky
Nick Barnes
Quentin Barnes
+Matthew Barnett
Richard Barran
Cesar Eduardo Barros
Des Barry
diff --git a/Misc/NEWS b/Misc/NEWS
index 469ca8b..1f4e282 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -186,6 +186,9 @@
Library
-------
+- Issue #13899: \A, \Z, and \B now correctly match the A, Z, and B literals
+ when used inside character classes (e.g. '[\A]'). Patch by Matthew Barnett.
+
- Issue #15109: Fix regression in sqlite3's iterdump method where it would
die with an encoding error if the database contained string values
containing non-ASCII. (Regression was introduced by fix for 9750).