Triggering UltiSnips in command-line mode

Question

Is there a way to expand a UltiSnips snippet while in vim command-line mode? I can only expand a snippet in insert mode.

I am using UltiSnips to help inserting unicode characters. And I need to write these characters in the command-line for searching. I do not want to insert them using <C-v>u. I also prefer not to use digraphs.

Answer 1

While I didn't achieve to trigger the completion from the command-line mode you can work this like this :

Prepare your command inside insert mode (or at least the part you cannot create from command-line mode). Yank it and insert it inside your command using <C-r> and the " register like so :

Insert Mode

tec<Tab>yiw

Commande-line Mode

:/<C-r>"

In command-line mode, there are only a set of word you can expand, for example : Command names, Tags, File names, ...

See : http://vimdoc.sourceforge.net/htmldoc/cmdline.html#cmdline-completion