Autocompletion triggers after line break (\\)

[Krasjet]

Describe the issue

Hi, I'm currently using the coc.nvim (with coc-vimtex extension ) for auto-completions. Since coc.nvim is using the regexes from deoplete.nvim, this issue should affect deoplete users as well.

This is a very minor issue but it is kind of annoying. Every time I type the line break sequence \\ (for example, inside a align* environment), the completion regexes will try to match a single \ and show a list of all the available commands. To reproduce it, first install coc.nvim with coc-vimtex or deoplete, and

\documentclass{minimal}
\usepackage{amsmath}
\begin{document}
\begin{align*}
  x &= 1 \
  %       ^ type '\' here
\end{align*}
\end{document}

I am using the Enter key to confirm a completion, so whenever I need to open a new line after the line break (which is something I always do), I have to manually type a space character to cancel the completion, or go back to normal mode and press o to open a new line, which can be quite cumbersome after a while.

Is it possible to modify the completion regexes so that it ignores the line break sequence (\\)?

Thank you.

[lervag]

I'm using coc.nvim myself, and I can reproduce this. That is, I assume what you want is this:

1. When the first \ is typed, coc.nvim may apply its magic and activate completion.
2. When the second \ is typed, the regex should be applied and indicate that no completion is allowed.

[Krasjet]

Exactly, the first \ is the prefix of a command, so no problem. But \\ should be interpreted as a line break and should not trigger auto-completion.

[lervag]

Should be fixed now.