Fix spurious warning 'misc-use-anonymous-namespace' (#1860) #1861
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Disables 'misc-use-anonymous-namespace' for usage of the BENCHMARK macro. This warning is spurious, and the variable declared by the BENCHMARK macro can't be moved into an annonymous namespace. We don't want to disable it globally, but it can be disabled locally, for the `BENCHMARK` statement, as this warning appears downstream for users. See: https://clang.llvm.org/extra/clang-tidy/#suppressing-undesired-diagnostics
LebedevRI
reviewed
Oct 10, 2024
| @@ -1554,6 +1554,7 @@ class Fixture : public internal::Benchmark { | |||
| BaseClass##_##Method##_Benchmark | |||
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| #define BENCHMARK_PRIVATE_DECLARE(n) \ | |||
| /* NOLINTNEXTLINE(misc-use-anonymous-namespace) */ \ | |||
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Can this use // comment style, like elsewhere in the project?
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That was what I originally tried to use, but the answer is no. The preprocessor interprets the \ at the end of the line as extending the comment to the next line. If you try to compile it, it fails with error: multi-line comment [-Werror,-Wcomment].
The comment has to be scoped by using the /* */ syntax, since the comment is embedded into the macro.
I also tried putting the comment before the macro, but that doesn't work, since the error occurs at the point of expansion.
LebedevRI
approved these changes
Oct 10, 2024
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@codeinred thank you! |
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Disables 'misc-use-anonymous-namespace' for usage of the BENCHMARK macro. This warning is spurious, and the variable declared by the BENCHMARK macro can't be moved into an annonymous namespace.
We don't want to disable it globally, but it can be disabled locally, for the
BENCHMARKstatement, as this warning appears downstream for users.See:
https://clang.llvm.org/extra/clang-tidy/#suppressing-undesired-diagnostics
Before: (warning shown)
After: (no warnings)