Show function signature when filling its arguments

[nothingelsematters7]

I like :GoInfo feature for functions using which I can view function arguments order with their types.

But when typed function name someFunction( with opening ( I cannot view arguments anymore without returning in Normal-mode and going to function name.

I would be great to have an option to see :GoInfo for used function when filling its argument list.

[kodek]

👍 I'd also love to see function signatures while in insert mode.

[shazow]

I think there's a way to do this using a preview window but that's not ideal. I've tried to get the completion hover to keep the signature while filling it out, but can't figure out the right approach to do that (my vimscript-fu is weak).

Alternatively, another solution might be to have a binding that fills out the signature as a snippet. That way it will appear inline as a reference but also remain overrideable and let you jump between fields to fill them in.

[fatih]

Hi everyone. Can you please try #685? It's far from perfect but at least it's helpful :) I'm thinking to add some docs and putting it behind a flag (maybe). Here is a sneak peak of it:

[Ch00k]

Is there a switch that I could use to disable this feature?

[jackielii]

https://github.com/Shougo/echodoc.vim

this plugin seems to work well, however I had to do set cmdheight=2

[alwindoss]

@fatih this works perfectly for times when functions are simpler.
in cases like binary.Write, let's say I have used this to type until binary.Write(buff, binary.B at this point in an attempt to check what is available in encoding/binary package I press C-x C-o and then the function info displayed at the bottom disappears.
How do I make it appear again and make it stay?