I have been using gocode with emacs and it gives completions of functions. Is there any way to get emacs to show the documentation of those functions in a pop up too. I am using auto-complete with go-mode.
If you use Icicles then you can use
C-M-mouse-2) to see the full doc string (in
*Help*) of any completion candidates. You can use the arrow keys
C-M-up to cycle among candidates, showing their doc the same way.
Also, the first line of the doc string is shown in the mode-line, so just cycling among candidates using
down etc. shows you that much, at least. (Dunno whether using
auto-complete-mode at the same time as Icicles is a problem or is useful.)
If you use
company-mode (which is preferred by most over
autocomplete these days), try