I use company-irony for C++ code completion. I have deleted the company-semantic backend from company-backends in my init.el.

Now I want to use Semantic and specifically the global-semantic-stickyfunc-mode to display current function at the top of the frame (this is useful if the function spans more than one frame). I enabled this in my init.el and it works.

So far I haven't noticed any problems with using Company and Semantic concurrently like this. Does anybody know if this might cause problems?

  • Try disabling semantic-idle-completions-mode and/or global-semantic-idle-completions-mode. – Dmitry May 25 '17 at 17:54
  • I'll try that tomorrow when I'm back at work. – Mikael Springer May 25 '17 at 18:21

I did run into trouble. Emacs would become unresponsive trying to complete code and at other times when I do not know what was executing. I disabled Semantic again and Emacs went back to normal again. So one clearly need to do some more configuration to run Company and Semantic concurrently, the only question is what.

  • Sometimes Semantic needs time to index files, for completions and etc. You could find out if that was the problem by trying Semantic without Company (it has a built-in completion feature too, although it's relatively awkward). – Dmitry Jun 24 '17 at 19:44

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