Are you using the CDT plugin? If so which version? The following applies to Eclipse 3.5 (Galileo) with the CDT plugin. If your setup is different then the rest of this answer may not be accurate.
Ctrl + Space
brings up the type and names of parameters for me.
Looking through the preferences (Window -> Preferences -> C/C++ -> Editor -> Content Assist ) there's an Auto-Activation panel. There's 3 triggers available, .
, ::
and ->
Typing this->
and waiting 200ms brings up a list of auto-complete options. This list contains the methods and shows both the type and name of the parameters (if the name is available)
The same applies to foo.
where foo
is an object and bar->
where bar
is a pointer.
If you're talking about when you're implementing a method, then the same applies. Foo::
+ Ctrl + Space
brings up the list of available items, including methods and shows parameter types and names.