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-rw-r--r--sphinx/domains/cpp.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/domains/cpp.py b/sphinx/domains/cpp.py
index 98a89594f..980c4db5c 100644
--- a/sphinx/domains/cpp.py
+++ b/sphinx/domains/cpp.py
@@ -5754,7 +5754,7 @@ class DefinitionParser(BaseParser):
while not self.eof:
if (len(symbols) == 0 and self.current_char in end):
break
- if self.current_char in brackets.keys():
+ if self.current_char in brackets:
symbols.append(brackets[self.current_char])
elif len(symbols) > 0 and self.current_char == symbols[-1]:
symbols.pop()