grammar: accept open sequences on match subject

psf · Nov 24, 2021 · 60e1838 · 60e1838
1 parent 4075944
commit 60e1838
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diff --git a/src/blib2to3/Grammar.txt b/src/blib2to3/Grammar.txt
@@ -238,7 +238,7 @@ yield_arg: 'from' test | testlist_star_expr
 # to reformat them.
 
 match_stmt: "match" subject_expr ':' NEWLINE INDENT case_block+ DEDENT
-subject_expr: namedexpr_test
+subject_expr: namedexpr_test (',' namedexpr_test)* [',']
 
 # cases
 case_block: "case" patterns [guard] ':' suite

diff --git a/tests/data/pattern_matching_extras.py b/tests/data/pattern_matching_extras.py
@@ -27,3 +27,19 @@ def func(match: case, case: match) -> case:
             ...
         case func(match, case):
             ...
+
+
+match maybe, multiple:
+    case perhaps, 5:
+        pass
+    case perhaps, 6,:
+        pass
+
+
+match more := (than, one), indeed,:
+    case _, (5, 6):
+        pass
+    case [[5], (6)], [7],:
+        pass
+    case _:
+        pass