Completion of nested snippets

[life00]

Hey!

I am encountering an inconvenience with the mechanics of snippet completion. I usually use snippets for writing LaTeX code which involves using multiple snippets at the same time. For example first expand a fraction \frac{$1}{$2}$0, then at $1 expand sum \displaystyle\sum_{$1}^{$2}($3)$0. This produces this code (█ indicating position of the cursor): \frac{\displaystyle\sum_{█}^{}()}{}. At this point everything is as expected.

I use <Tab> to navigate the snippet. The problem is that the second expanded completion is completely ignored and I am not able to jump through it. It only follows the first used completion until it is complete. So in the above example when I press <Tab> it would result in the following state (█ is cursor): \frac{\displaystyle\sum_{}^{}()}{█} instead of \frac{\displaystyle\sum_{}^{█}()}{}.

This behavior defeats the point of using snippets for me. If I am not mistaking this behavior is actually caused by neovim? It is specified in https://cmp.saghen.dev/configuration/snippets.html#snippets that "Blink uses the vim.snippet API by default for expanding and navigating snippets.", so it might be more appropriate to create an issue in neovim repository?

I would expect the completion engine to instead nest all the completions and keep track of all the future positions that should be respected. Maybe its possible to implement a solution inside the blink.cmp?

I use LazyVim in my setup if it is necessary to know.

Thanks for such a wonderful plugin btw :D

[Saghen]

You'll want to look into using LuaSnip or mini.snippets since the built-in vim.snippet doesn't support nested snippet sessions: https://cmp.saghen.dev/configuration/snippets#luasnip