Git issue 580: Regression in v2025.7.31: \P{L} no longer matches in simple patterns

Author: Matthew Barnett

changelog.txt

@@ -1,3 +1,7 @@
+Version: 2025.7.32
+
+    Git issue 580: Regression in v2025.7.31: \P{L} no longer matches in simple patterns
+
 Version: 2025.7.31
 
     Further updates to main.yml.

pyproject.toml

@@ -1,16 +1,17 @@
 [build-system]
-requires = ["setuptools > 61.0"]
+requires = ["setuptools > 77.0.3"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "regex"
-version = "2025.7.31"
+version = "2025.7.32"
 description = "Alternative regular expression module, to replace re."
 readme = "README.rst"
 authors = [
     {name = "Matthew Barnett", email = "[email protected]"},
 ]
-license = {file = "LICENSE.txt"}
+license = "Apache-2.0 AND CNRI-Python"
+license-files = ["LICENSE.txt"]
 
 classifiers = [
     "Development Status :: 5 - Production/Stable",

regex_3/_regex_core.py

@@ -336,7 +336,7 @@ def _compile_firstset(info, fs):
     "Compiles the firstset for the pattern."
     reverse = bool(info.flags & REVERSE)
     fs = _check_firstset(info, reverse, fs)
-    if not fs:
+    if not fs or isinstance(fs, AnyAll):
         return []
 
     # Compile the firstset.

regex_3/regex.py

@@ -241,7 +241,7 @@
   "VERSION1", "X", "VERBOSE", "W", "WORD", "error", "Regex", "__version__",
   "__doc__", "RegexFlag"]
 
-__version__ = "2.5.156"
+__version__ = "2.5.157"
 
 # --------------------------------------------------------------------
 # Public interface.

regex_3/test_regex.py

@@ -4373,6 +4373,10 @@ def test_hg_bugs(self):
         self.assertEqual(bool(regex.match(r'\d', '\uFF19')), True)
         self.assertEqual(bool(regex.match(r'(?a:\d)', '\uFF19')), False)
 
+        # Git issue 580: Regression in v2025.7.31: \P{L} no longer matches in simple patterns
+        self.assertEqual(bool(regex.match(r"\A\P{L}?\p{L}", "hello,")), True)
+        self.assertEqual(bool(regex.fullmatch(r"\A\P{L}*(?P<w>\p{L}+)\P{L}*\Z", "hello,")), True)
+
     def test_fuzzy_ext(self):
         self.assertEqual(bool(regex.fullmatch(r'(?r)(?:a){e<=1:[a-z]}', 'e')),
           True)