YouCompleteMe available as a Server

[Tom]

It may be of interest of emacs code completion developers.
The developers of this VIM plugin separated the semantic
part from the VIM frontend, so the backend can be used 
by other editors. It's a much more sensible approach than 
reinventing the semantic wheel separately for each editor
and thus duplicating the work and wasting developer 
resources.



The YouCompleteMe (YCM) code-completion plugin for Vim has been a
resounding success. It’s one of the most popular Vim plugins, if
not the most popular one.1 The main YCM logic is now available as
ycmd, an independent HTTP+JSON server. Client plugins for
different editors can easily be written.

http://val.markovic.io/articles/youcompleteme-as-a-server