black/parser: support as-exprs within call args (#2608)

psf · Nov 14, 2021 · 147d075 · 147d075
1 parent eb9d039
commit 147d075
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diff --git 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
@@ -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
@@ -73,6 +73,7 @@
 PY310_CASES = [
     "pattern_matching_simple",
     "pattern_matching_complex",
+    "pattern_matching_extras",
     "parenthesized_context_managers",
 ]