How to get all options to show up?

[jave3737]

I am currently using:

• windows 10
• vim8.2
• rust-analyzer

And the following settings for mucomplete in my vimrc.

set completeopt+=menuone
set completeopt+=noselect
set omnifunc=LanguageClient#complete
set signcolumn=yes
let g:mucomplete#enable_auto_at_startup = 1
let g:mucomplete#reopen_immediately = 0
let g:mucomplete#completion_delay = 100 

I have omni completion working but I would like it to show all options but so far i have to type at least one character before the options appear.

If I press tab at this point nothing shows up. But if I press <c-x><c-o> then everything shows up.

If I then type something like "col" in this case then press tab i get autocompletion

How can I get options to show up immediately once I press tab without having to type certain letters first. I don't always know what the next letter should be.

[lifepillar]

You may try setting g:mucomplete#empty_text=1. If that option has undesirable side effects (it enables completion even at the start of a line or after a space), you may customize thecan_complete condition for C++ to allow completion to be triggered after ::. See https://github.com/lifepillar/vim-mucomplete/wiki/Cpp--member-auto-completion and also #117.