Eclipse C++ content assist, auto activation

I have noticed in Eclipse that content assist kicks in after inserting -> or . or ::

I really like this feature, but I was hoping that it would be a little more flexible and auto activate after every 2-3 character typed. An example of this is in Code::Blocks. It allows you to auto activate content assist after a certain number of chars typed. Anot开发者_JAVA技巧her example of this is in Visual Studio while using Visual Assist X, "Whole Tomato".

Is it possible to somehow enable this for Eclipse?

I havn't seen a setting to auto-activate the content assist, for other than . :: and -> However, Hit CTRL+Space to autocomplete or bring up the content assist , e.g. after you typed 2-3 chars.