Ultisnips not working with space

Question

I have the following snippet

context "math()"
snippet `v([a-zA-Z]) ` "bb" A
``rv = '\\mathbf{' + m[1] + '}'`` 
endsnippet

Now, most of my snippets work, however, snippets with regex that ends with space do not exectute properly. When writing va + space, I get va instead of \mathbf{a}. I previously used hypersnips in vscode, for which this code worked. Does anyone know where is the issue?

NB: Any input of the form 'text*space*' doesn't seem to be recognized when written as 'text ' in the snippet section.

Answer 1

There are several issues with the syntax. Though HyperSnips is inspired by UltiSnips, there are notable differences between them. In particular,

• For regex snippets, you need to specify the r flag
• There are various forms of interpolation (shell, python, vim) in Ultisnips. The most flexible of these is python interpolation, which allows access to regex match groups (and a host of other things)
• For python interpolation, use `!p ...` in place of `...`, and
• snip.rv in place of rv
• match groups are accessible with match.group()

For more, see

• :h UltiSnips-snippet-options
• :h UltiSnips-python