Is there a way of having snippet alias?

snippet "equ?" "Equation snippet" r
blahlbalh
endsnippet

See "r" (regular expression) option at the end of UltiSnips-adding-snippets section in the help.

Sorry but I don't understand your answer.
Let me see if I can be more clear.

Suppose I define the snippet:

snippet eqn
\begin{equation}
$1
\end{equation}
endsnipppet

and now I would like to define a new snippet that would be expanded to exactly the same content of this one
but without having to type the text again, so if I would change the definition of the first snippet the definition for the second
would change also.

Of course I could do it manually, but I am just wondering if there is a way to do it.

thanks!

one possible way would be maybe to have

snippet equ
eqn<C-R>=UltiSnips_ExpandSnippetOrJump()<CR>
endsnippet

but I am not sure this works, and it doesn't seem the nicest way to do it.

Jorge, have you tried the snippet I posted? It works just as you intended. It uses a "regular expression" trigger (snippet option r), that is the trigger is interpreted as a regular expression and then expanded. I pointed you to the documentation, please read this section in its entirety to understand.

http://bazaar.launchpad.net/~sirver/ultisnips/trunk/view/head:/doc/UltiSnips.txt#L251

Sorry, I still don't understand if what I want can be done.
Your example was

snippet "equ?" "Equation snippet" r
 blahlbalh
 endsnippet

I understand what it does but I don't think it is what I was asking, because in this example
I would still have to define the snippet again (copying the text from the place where you defined it),
but I was just asking if there is a way of saying
"define snippet equ in such a way that it is equivalent to the existing snippet eqn"

So if later you discovered that there is a bug in your snippet and change it, I wouldn't have to update anything since my snippet would inherit the text from your snippet.

From reading the documentation it doesn't seem that it is possible, I was just wondering.

There is no way to assign another trigger to one of the shipped snippets, that is correct. You can only assign multiple triggers to a snippet that you define anew.

thanks for your answer.
I was just wondering if that would be possible.
What I do now is the following

snippet equ
eqn
endsnippet

and then if I expand equ it expands to eqn which I then expand to whatever eqn expands too.

It would be nice to do it all in one pass, but it is not a big deal.

Thanks again,

Best regards.

you could use an imap of course.

I don't think imap is a good solution, snippets are much better :)
Let me ask you the following,

In the tex file if I type
eqn<c-r>=UltiSnips_ExpandSnippet()<cr>

then I get the snippet expanded to whatever eqn expands to (here
<c-r> means hitting ctrl+r and <cr> means pressing Enter).

But if I define the following snippet:

snippet equ
eqn<c-r>=UltiSnips_ExpandSnippet()<cr>
endsnippet

when I expand the snippet it just gets the text literally inserted,
not the value of the snippet.
Is there a way of expanding to whatever eqn expands to, instead of inserting the text?

Thanks

No, that would be a feature overlap with mappings, something that I want to avoid. There is an evilish hack to achieve it though

snippet equ
eq`!p vim.command('call feedkeys("\<tab>")')`
endsnippet

the feedkeys call will only be executed by vim after all commands from ultisnips are run therefore immediately expanding the eq snippet.

I think this answers the initial question
group each option with "(option)" and use the optional "|"

snippet "(eqn)|(equ)" "Equation snippet" r
blalbalh
endsnippet""

I think this answers the initial question
group each option with "(option)" and use the optional "|"

snippet "(eqn)|(equ)" "Equation snippet" r
blalbalh
endsnippet""