From 147d075a4c702ffd6822100dc1f7a6384e52fa57 Mon Sep 17 00:00:00 2001
From: Batuhan Taskaya <isidentical@gmail.com>
Date: Sun, 14 Nov 2021 17:04:31 +0300
Subject: [PATCH] black/parser: support as-exprs within call args (#2608)

---
 src/blib2to3/Grammar.txt              | 1 +
 tests/data/pattern_matching_extras.py | 9 +++++++++
 tests/test_format.py                  | 1 +
 3 files changed, 11 insertions(+)
 create mode 100644 tests/data/pattern_matching_extras.py

diff --git a/src/blib2to3/Grammar.txt b/src/blib2to3/Grammar.txt
index 49680323d8b..c2a62543abb 100644
--- a/src/blib2to3/Grammar.txt
+++ b/src/blib2to3/Grammar.txt
@@ -186,6 +186,7 @@ arglist: argument (',' argument)* [',']
 # that precede iterable unpackings are blocked; etc.
 argument: ( test [comp_for] |
             test ':=' test |
+            test 'as' test |
             test '=' test |
 	    '**' test |
             '*' test )
diff --git a/tests/data/pattern_matching_extras.py b/tests/data/pattern_matching_extras.py
new file mode 100644
index 00000000000..b17922d608b
--- /dev/null
+++ b/tests/data/pattern_matching_extras.py
@@ -0,0 +1,9 @@
+match something:
+    case [a as b]:
+        print(b)
+    case [a as b, c, d, e as f]:
+        print(f)
+    case Point(a as b):
+        print(b)
+    case Point(int() as x, int() as y):
+        print(x, y)
diff --git a/tests/test_format.py b/tests/test_format.py
index 4359deea92b..8f8ffb3610e 100644
--- a/tests/test_format.py
+++ b/tests/test_format.py
@@ -73,6 +73,7 @@
 PY310_CASES = [
     "pattern_matching_simple",
     "pattern_matching_complex",
+    "pattern_matching_extras",
     "parenthesized_context_managers",
 ]