Expand with key in middle of word (no space)

[quwa...@gmail.com]

Hi,

I have a question (similar to this thread, which did not get any repsonse):

How can I achieve snippet expansion even if the trigger-key is in the middle of a word (no space)?

For example, let's say that I have a snippet for zah with the key #bar. If I then type foo#bar and hit TAB, I want the result to be foozah.

I am looking for exactly this behavior, not typing foo #bar and the snippet then erasing the space upon expansion.

Currently, I can only expand the snippets if I put them as separate words, i.e. foo #bar to foo zah.

Is there any way to write a snippet that does this or any other type of workaround to achieve what I want?

Thank you

[Anders Eurenius]

Interesting question. Maybe another trick worth trying might be a (.*) prefix that you just put back in the expansion? So foo#bar matches (.*)#bar and expanded to foo#bar, which the behaviour you wanted, right?

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[quwa...@gmail.com]

Thanks for the reply, this sounds intriguing. I tried experimenting a bit with it, but did not get it to work. If possible, could you post a simple snippet example implementing your idea?

Note that what I am looking for is to expand with the trigger key (TAB) as usual, and the #bar working regardless of what precedes it, i.e.

foo#bar + press TAB = foozah

abcde#bar + press TAB = abcdezah

www#bar + press TAB = wwwzah

and so on. Would the (.*) prefix method be able to render this?

On Monday, October 23, 2017 at 11:11:45 AM UTC+2, aes wrote:

Interesting question. Maybe another trick worth trying might be a (.*) prefix that you just put back in the expansion? So foo#bar matches (.*)#bar and expanded to foo#bar, which the behaviour you wanted, right?

On Tue, Oct 17, 2017 at 4:40 PM, <quwa...@gmail.com> wrote:

Hi,

I have a question (similar to this thread, which did not get any repsonse):

How can I achieve snippet expansion even if the trigger-key is in the middle of a word (no space)?

For example, let's say that I have a snippet for zah with the key #bar. If I then type foo#bar and hit TAB, I want the result to be foozah.

I am looking for exactly this behavior, not typing foo #bar and the snippet then erasing the space upon expansion.

Currently, I can only expand the snippets if I put them as separate words, i.e. foo #bar to foo zah.

Is there any way to write a snippet that does this or any other type of workaround to achieve what I want?

Thank you

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[Anders Eurenius]

Hah, nope, I think I've confused yasnippet with something else. I think this might what you're looking for, though: https://github.com/joaotavora/yasnippet/blob/master/yasnippet.el#L411 . It's a customization to specify how to find candidate trigger words. If I understand correctly, prefixing this with something like the lambda below might do it. You may need to fiddle with the second syntax class set to make sure it covers "#" in the language you're working with.

(lambda ()

  (if (< (skip-syntax-backward "w") 0)

      (skip-syntax-backward "_'")))

The reason you have to have a function/lambda and not simply specify "w_'" is of course that it would skip "foo", too. This first moves over the "bar" word chars, and then the "#" char in two separate steps.

​See also:

https://www.gnu.org/software/emacs/manual/html_node/elisp/Motion-and-Syntax.html

https://www.gnu.org/software/emacs/manual/html_node/elisp/Syntax-Class-Table.html#Syntax-Class-Table