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When running clang-format-buffer or clang-format-region when a region has been been selected, no change is made to the formatting. However, in *Messages*, I see (clang-format: success). Using clang-format in the terminal works fine, and the emacs package clang-format is configured to point towards the correct location where clang-format is installed.

These are the only lines I have in my init.el related to clang-format (I've also tried all variations of setting / not setting clang-format-style and clang-format-style-option):

;; Clang stuff (require 'clang-format) (setq clang-format-style "file")

Is there something I'm missing?

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2 Answers 2

Reset to default
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You need to generate a .clang-format file in your project's root, with the command clang-format -style=llvm -dump-config > .clang-format.

More info on this page.

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  • Thank you! I thought I had already completed this step but turns out I hadn't. Commented Feb 20, 2020 at 15:08
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You set clang-format-style to "file". In that case, clang-format.el will first look for a .clang-format file. It it finds one, it will use it. Otherwise, it will check the clang-format-fallback-style. If that is set to "none", no changes will be made.

If that is not want you want, you have two options:

  • Provide a .clang-format file (*)
  • Change the clang-format-fallback-style to "llvm"

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

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