Disabling syntax invalidates text object $

[jimmy-zx]

Description

When let g:vimtex_syntax_enabled = 0 is set, the text object $ is invalidated.

Steps to reproduce

minimal.vim:

set nocp

call plug#begin()
Plug 'lervag/vimtex'
call plug#end()

let g:vimtex_syntax_enabled = 0

syntax on

minimal.tex:

\begin{document}
$a + b = c$
\end{document}

1. vim -u minimal.vim minimal.tex
2. Perform da$ on $a + b = c$

Expected behavior

$a + b = c$ deleted

Actual behavior

Nothing happens

(Other text objects described in the documentation still works)

Do you use a latexmkrc file?

No

VimtexInfo

None

[lervag]

You need syntax highlighting enabled for some of the text objects to work. This is because these text objects rely on the syntax information in their implementation.

I realize this is not properly documented, so I'll make an update to the docs to point it out.