https://bugs.llvm.org/show_bug.cgi?id=44162
Bug ID: 44162
Summary: Python 3.8 emits SyntaxWarning for "is" with a literal
in clang-format.py
Product: clang
Version: 9.0
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Formatter
Assignee: unassignedclangb...@nondot.org
Reporter: lukas.karnow...@gmail.com
CC: djas...@google.com, kli...@google.com,
llvm-bugs@lists.llvm.org
Since Python 3.8 a SyntaxWarning is emitted if a literal is compared with "is"
or "is not". Currently clang-format.py:123 uses the following comparison, which
produces the warning:
if op[0] is not 'equal':
Reproducable with Python 3.8:
> python --version
Python 3.8.0
> python
>>> "foo" is "bar"
<stdin>:1: SyntaxWarning: "is" with a literal. Did you mean "=="?
False
Additional information: https://bugs.python.org/issue34850
The solution is simply to use "!=" instead of "is not".
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