[clang-format] Linebreaks and indentation change when updating from v18.1.8 -> v19.1.5

[RainerKuemmerle]

I noticed that in my code, clang-format v19.1.5 behaves very different with the same settings.

An excerpt from the formatting changes.

v18.1.8

namespace g2o {

class G2O_STUFF_API Sampler {
 public:
  /** seed the random number generator */
  static void seedRand(unsigned int seed) {
    std::srand(seed);
  }
};

}  // namespace g2o
...

v19.1.5

namespace g2o {

class G2O_STUFF_API
Sampler{public :
            /** seed the random number generator */
            static void seedRand(unsigned int seed){std::srand(seed);
}
}
;

}  // namespace g2o

The .clang-format file is

BasedOnStyle: Google
DerivePointerAlignment: false

I noticed that formatting stays kind of as expected if I do not close the class definition by }; but just } which is non working syntax however.

Locally I am using Ubuntu 24.10 with apt.llvm.org as additional package source.

$ clang-format --version
Ubuntu clang-format version 19.1.5 (++20241119043710+51dee6b64fda-1~exp1~20241119163724.28)

The same effect can however also be seen when using the pre-commit framework (with a slightly older version of clang-format), e.g., as in this PR of my project:
https://github.com/RainerKuemmerle/g2o/pull/837/files

Please let me know if I should provide additional information. Thanks.

[owenca]

Now you need to tell clang-format that G2O_STUFF_API is an attribute macro by adding the following to your config:

AttributeMacros: [G2O_STUFF_API]

[owenca]

Duplicate of #94184.