Is there a option/plugin that display possible fillins after . :: ->

[acw]

as topic says, looking for a option and/or plugin to display possible functions/variables following

Code

.
::
->

Been looking all over the code-completion/symbols tab but cant find anything. Guess the main problem is that i don't know what the feature is called.
For example if you type
std::   it would give you a list containing vector , map , string, cout, cin and so on.

It's a feature you find by default in other IDEs like Eclipse && visual studio so i guess there's an option somewhere, i just cant find it.
Thankful if someone could help me ou. its a pain to actually having to remember the exact spelling of all variable names

[oBFusCATed]

the menu item Edit -> Complete code triggers it, you can follow the handler of the item