Don't pair escaped parens in swift-mode

[samglt]

Related to #1225

This disables pairing escaped parens together, but still allows a "(" to be paired and become "()" which is commonly used for string interpolation.

[woolsweater]

Nice, thanks for fixing this; I've been meaning to get around to it!

I would suggest a bit fuller of a definition:

(sp-local-pair "\\(" ")" :actions '(insert wrap) :when '(sp-in-string-p))

Including the correct closing delimiter, rather than nil, lets other Smartparens facilities like sp-unwrap-sexp work correctly. The action list allows wrapping with a region. I.e., while it's a bit of an odd edit, if the region is active and denoted by the | characters:

let s = "foo |bar|"

then typing a backslash followed by an open paren correctly wraps "bar" in an interpolation.

Finally, while you're right that there's no case currently in Swift for escaped parens outside of a string, I don't think it hurts to include the :when predicate.

[samglt]

Good points. Trying that out though, unwrapping only removes the parens and not the initial backslash, so "\(|foo)" becomes "\|foo". The normal "(" ")" pairing has to take precedence I think

[woolsweater]

Hmm, interesting 🤔 Are you using https://github.com/swift-emacs/swift-mode? I forgot actually that that mode does not propertize the interpolation delimiters such that smartparens can work with them (for example sp-mark-sexp, sp-forward-sexp etc. do not work). I just get an error trying to unwrap when using that mode.

Using https://codeberg.org/woolsweater/swift-ts-mode (authored by me :) does unwrap correctly:

I have not, however, tried the other swift-ts-mode.

[samglt]

That must be it. I'm using the the other one. I'll try yours out

[woolsweater]

This will be a bit of a tangle for smartparens. 🙁