Understand treesitter filetypes

[LnLcFlx]

Treesitter uses latex as the filetype name instead of tex like native vim.
In #823 similarly one had to ls.filetype_extend("markdown_inline", {"markdown"}) in order to make

ft_func = require("luasnip.extras.filetype_functions").from_cursor_pos

work.
Is it possible/useful to make Luasnip understand the treesitter names such that I don't manually need to filetype_extend all treesitter names to native ones?

[leiserfg]

The fts of a parser are available on vim.treesitter.language.get_filetypes(), that should do it.

[leiserfg]

Can you try with this pr ?
#1175

[LnLcFlx]

Works!

[LnLcFlx]

Now it does not work anymore!
I pulled the latest master and when I do

ft_func = require('luasnip.extras.filetype_functions').from_pos_or_filetype

I get

Error detected while processing TextChangedI Autocommands for "*":
Error executing lua callback: ...m/lazy/LuaSnip/lua/luasnip/extras/filetype_functions.lua:8: attempt to call field 'list_contains' (a nil value)
stack traceback:
        ...m/lazy/LuaSnip/lua/luasnip/extras/filetype_functions.lua:8: in function 'from_cursor_pos'
        ...m/lazy/LuaSnip/lua/luasnip/extras/filetype_functions.lua:42: in function 'ft_func'
        ....local/share/nvim/lazy/LuaSnip/lua/luasnip/util/util.lua:364: in function 'get_snippet_filetypes'
        ...cal/share/nvim/lazy/cmp_luasnip/lua/cmp_luasnip/init.lua:67: in function 'complete'
        ...lcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/source.lua:326: in function 'complete'
        ...lnlcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:299: in function 'complete'
        ...lnlcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:169: in function 'callback'
        ...lnlcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:229: in function 'autoindent'
        ...lnlcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:161: in function 'on_change'
        ...lnlcflx/.local/share/nvim/lazy/nvim-cmp/lua/cmp/init.lua:340: in function 'callback'
        ...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:49: in function 'emit'
        ...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:23: in function <...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:22>

every time I try to expand a snippet.

EDIT: from_cursor_pos instead of from_pos_or_filetype still works.

[L3MON4D3]

Dang, I'm surprised that 1. vim.list_contains was not available before 0.10, and 2. that from_pos_or_filetype does not throw the error, it just calls from_cursor_pos.
Anyway, the fix should be up now, thanks for pointing it out so quick :)