{"id":8,"date":"2014-11-19T19:33:00","date_gmt":"2014-11-19T19:33:00","guid":{"rendered":""},"modified":"2016-02-25T18:09:02","modified_gmt":"2016-02-25T18:09:02","slug":"autocompletion-for-c-and-c-with-emacs-24","status":"publish","type":"post","link":"https:\/\/www.root42.de\/blog\/?p=8","title":{"rendered":"Autocompletion for C and C++ with Emacs 24"},"content":{"rendered":"

I have already done a blog<\/a> post on auto completion using Emacs. But that was back in Emacs 23 days. Long ago…<\/p>\n

Since then a lot has happened. Emacs 24<\/a> has been released, package managers like MELPA<\/a> or ELPA<\/a> have become standard, and company-mode<\/a> seems to be winning against auto-complete<\/a>. Also, clang<\/a> has made huge strides forward.<\/p>\n

So it is time to revisit the task of developing C or C++ using Emacs. I have put online an easy-to-install Emacs init.el<\/a> that you can use as a start for your own development environment. I am using the OS X version of Emacs, but this should also work on Linux, given that you have clang and git installed.<\/p>\n

You can install this init.el by issuing the following commands:<\/p>\n

cd
git clone https:\/\/github.com\/root42\/yet-another-emacs-init-el
mkdir ~\/.emacs.d
cd ~\/.emacs.d
ln -snf ..\/yet-another-emacs-init-el\/init.el .
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The file will make sure that upon startup of Emacs all necessary packages are installed, like company, magit but also LaTeX tools like aucTeX or refTeX. You can disable this check (or individual packages) in the init.el.<\/p>\n
The code is up on github<\/a>, so feel free to fork and\/or contribute.<\/p>\n
When doing simple C++ programming using only standard libraries, you should be ready to go. For more complex projects, you have to tweak the clang parameters, so that the compiler will find the header files. Completion happens automatically after “.<\/span>“, “-><\/span>” and “::<\/span>” but also when pressing M-\/. You can rebind this key in the init.el, of course. This is what the completion looks like:<\/p>\n
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My most commonly used keys that I have re-bound are as follows:<\/div>\n
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