aaron.ballman added a comment. In D69764#2056104 <https://reviews.llvm.org/D69764#2056104>, @rsmith wrote:
> I'm uncomfortable about `clang-format` performing this transformation at all. > Generally, clang-format only makes changes that are guaranteed to preserve > the meaning of the source program, and does not make changes that are only > heuristically likely to be semantics-preserving. But this transformation is > not behavior-preserving in a variety of cases, such as: > > #define INTPTR int * > const INTPTR a; > // INTPTR const a; means something else > That's an excellent point. I agree that the formatting cannot change the meaning of the code that's being formatted -- that would be bad. > I also don't think this is something that a user would *want* in > `clang-format`: changing the location of `const`s is something that would > likely be done rarely (probably only once) when migrating to a different > coding style, rather than being done on the fly after each edit to a source > file. I'm not certain I agree with this. For instance, you can run clang-format as a precommit step or as part of your CI pipeline to bark at users when they get formatting incorrect while working on a team project. (We do this internally with some of our internal projects.) > Fundamentally, I don't think this transformation is simply reformatting, and > I don't think it can be done sufficiently-correctly with only a > largely-context-free, heuristic-driven C++ parser. As such, I think this > belongs in `clang-tidy`, not in `clang-format`. I think clang-tidy has the machinery needed to do this properly, but I think clang-format is logically where I would go to look for the functionality (certainly before thinking of clang-tidy) because this is more related to formatting than not. That said, if we cannot make it work reliably within clang-format, I'd rather see it in clang-tidy than nowhere. CHANGES SINCE LAST ACTION https://reviews.llvm.org/D69764/new/ https://reviews.llvm.org/D69764 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
