Here is a situation. I use deoplete but since the pop-up menu when I type in something already puts the cursor at the first item on the list, when I type in return, it inserts a new line.
So I want to type in return + shift to insert a new line (move the cursor to the next line on insert mode) and typing in just return key adds the completion target.
Is this possible? I use neovim 0.3.1.
"return + shift" (AKA <S-Enter>) cannot be mapped in Nvim, unless you're using a GUI that captures "shift" and separately. But "alt + return" (<A-Enter>) can be mapped.
:inoremap <A-Enter> <C-e><Enter>
^[OM, so it's perfectly mappable using say set <f26>=^[OM. set <s-enter> is not recognized, however.
<S-Cr> in nvim without problem using (stackoverflow.com/questions/16359878/vim-how-to-map-shift-enter/…). For regular Vim however I think @Mass' comment still applies.