Cannot map <tab> in selection mode, despite not using it as UltiSnips bind

[oiiiiiiii]

When I bind something to tab in select mode, I can only trigger that bind when there are no tabstops generated by snippets.

Expected behavior:

I can bind tab the way I like when I don't even use it for UltiSnips

Actual behavior:

I can not.

Steps to reproduce

1. Setup g:UltiSnipsExpandTrigger to something entirely different than tab
2. Bind something to tab in select mode (smap whatever
3. Trigger a snippet with different tabstops
4. Enter the select mode (gh) and select something (using arrows)
5. Try triggering the bind in selection mode (doesn't work)

Context: The select mode is also being used for default placeholders (which is where I would like to have my own binding to tab) but this behavior also occurs in snippets that don't use that and when I manually select something as described in the reproduction steps.

If there are no active snippets, it works perfectly fine when I select something and trigger my custom map.

---

• Operating System: Ubuntu 24.04.1 LTS
• Vim Version: NVIM v0.10.0
• UltiSnips Version: master branch
• Python inside Vim: 3.12.3
• Docker repo/vimrc:

[oiiiiiiii]

Found a workaround by adding to g:UltiSnipsMappingsToIgnore. If this is the intended way to do it than I guess this issue can be closed

[SirVer]

Could it be that you wanted to map it in visual mode instead of select mode? Did you use xmap or smap or the much broader vmap? The expectation of a user in select mode (which is not visual mode) is that typing overwrites, so most select mode mapping that map to typable characters are done in error.

This is a common mistake, explained (maybe poorly) in https://github.com/SirVer/ultisnips/blob/master/doc/UltiSnips.txt#L381. If you indeed want something mapped in select mode to tab, then setting the UltiSnipsMappingsToIgnore

[oiiiiiiii]

No I really meant the select mode, not visual mode. My problem was that I wanted to map to UltiSnips#JumpForwards() only if UltiSnips#CanJumpForward() because otherwise I want to jump to the next placeholder of my LSP provided snippets (that also use select mode for default values). But I couldn't manually map in s mode using smap or vmap, even when I didn't bind for ultisnips at all. But now it works using UltiSnipsMappingsToIgnore.