Is a noop. Returns (clang-format: success) in mini buffer

[appetrosyan]

Steps to reproduce open any file with extension .cpp. and run clang-format-buffer.

• expected behaviour:
  file changes

• actual behaviour
  noop.

[Paethon]

Yes, same for me. Worked for years, but currently it seems to be broken (just doesn't do anything)

[hojoon-lee]

I had the same issue, and managed to fix the problem by replacing clang-format.el from melpa with the one in the newest clang installation.

[philipp-classen]

Finally, I figured it out. It only works if you have a .clang-format file:

https://emacs.stackexchange.com/a/55650/8261

Otherwise, it will use the fallback style. I changed it now to:

Clang Format Fallback Style: llvm

By default, it is none, which explains why nothing changed.

[haifenghan]

Thanks @philipp-classen , i-t works for me.

[haifenghan]

Copy from the stackexchange:

(*) To generate a .clang-format file, you can use:

clang-format -style=llvm -dump-config > .clang-format