Deoplete.nvim: I want to determine the candidate for completion by TAB

[nabezokodaikon]

Problems summary

I want to determine the candidate for completion by TAB.

Expected

A complementary candidate is determined by TAB.

Environment Information

• deoplete version (aebaec4adbb65339601063f1ee533eef09220145):

• OS: Mac

• neovim: 0.3.7:

• :checkhealth or :CheckHealth result(neovim only): OK

Provide a minimal init.vim/vimrc with less than 50 lines (Required!)

call deoplete#custom#option('keyword_patterns', {   
   \ 'denite-filter': '',   
   \})  

call deoplete#custom#source('_',
    \ 'matchers', ['matcher_fuzzy', 'matcher_length'])

call deoplete#custom#option('sources', {
    \ 'scala': ['buffer', 'dictionary', 'LanguageClient'],
    \ 'rust': ['buffer', 'dictionary', 'LanguageClient'],
    \})

call deoplete#custom#source('_', 'converters', [
    \ 'converter_remove_paren',
    \ 'converter_remove_overlap',
    \ 'matcher_length',
    \ 'converter_truncate_abbr',
    \ 'converter_truncate_info',
    \ 'converter_truncate_menu',
    \ 'converter_auto_delimiter',
    \])

call deoplete#enable()  

inoremap <expr><CR>  pumvisible() ? deoplete#mappings#close_popup() : "<CR>"

How to reproduce the problem from neovim/Vim startup (Required!)

1. Make some suggestions and display completions.
2. Select a completion candidate and type the TAB key
3. The completion candidate selected with the TAB key is input.

[Shougo]

inoremap <silent><expr> <TAB>  pumvisible() ? "\<C-n>" : "\<TAB>"