localcfg/plugins/vim_clevertab.vim

Enforce vim script implementation to reduce ambiguities and improve robustness:

scriptversion 4

Configure preferred order of completion:

let s:types = ['start', 'tab', 'keyword', 'omni', 'dictionary', 'stop']
if has('insert_expand') && has('pythonx')
    let s:types = insert(s:types, 'ultisnips', 2)
endif

execute 'inoremap <silent> <Tab> ' ..
\   join(map(s:types,
\            {_, v -> printf('<C-r>=CleverTab#Complete("%s")<CR>', v)}),
\        '')
inoremap <silent> <S-Tab> <C-r>=CleverTab#Complete('prev')<CR>