Trailing parens

[Chris Ford]

Hi all,

I regularly refactor Clojure forms and then tidy them with =ip. This works great for handling indentation, but there's one thing that it misses that keeps catching me out.

Following what I believe to be good Clojure style, this...

(defn foo [x]

  (+ x 1)

)

should become...

(defn foo [x]

  (+ x 1))

Is there any way to tidy up trailing parentheses? Is there a command other than = I should be using?

Cheers,

Chris

PS I'm using Fireplace, but I assume this behaviour is controlled by the static files.

[guns]

On Sun 24 Nov 2013 at 10:11:59PM +0300, Chris Ford wrote:
> Hi all,
>

> I regularly refactor Clojure forms and then tidy them with *=ip*. This

> works great for handling indentation, but there's one thing that it misses
> that keeps catching me out.
>
> Following what I believe to be good Clojure style, this...
>
> (defn foo [x]
> (+ x 1)
> )
>
> should become...
>
> (defn foo [x]
> (+ x 1))
>
> Is there any way to tidy up trailing parentheses? Is there a command other

> than *= *I should be using?

People generally use plugins that offer balanced bracket insertion such
as paredit.vim or vim-sexp¹.

It sounds like you might like the "electric-return" feature from
paredit.vim.

If you just want to manually join the bracket on the next line, you can
always use vim's join-lines command: J

Unfortunately, Vim unhelpfully adds a space when joining ] and }. There
may be a plugin to fix that, but I opted to patch vim instead. (patch
attached)

HTH

guns

¹ This is an S-Expression plugin that I wrote earlier in the year. It
differs philosophically from paredit.vim (text objects vs. emacs style
editing), but they both offer balanced bracket insertion for Clojure.

[Chris Ford]

Thanks for the J tip. I didn't know about it, and it makes fixing the problem when it occurs much easier.

I do actually use paredit.vim and I'm very happy with it. However, unless I've misunderstood your mail, it doesn't offer a way to recover from a trailing paren once you've created one.

True, when I use paredit.vim, I don't create trailing parens as I make the fn. However, once I start messing around with it, deleting and moving stuff, I often end up with trailing parens as collateral damage. Is there any command that I can apply to a paragraph that will format it according to default Clojure conventions?

Cheers,

Chris

[guns]

On Sun 24 Nov 2013 at 10:54:15PM +0300, Chris Ford wrote:

> True, when I use paredit.vim, I don't create trailing parens as I
> make the fn. However, once I start messing around with it, deleting
> and moving stuff, I often end up with trailing parens as collateral
> damage. Is there any command that I can apply to a paragraph that will
> format it according to default Clojure conventions?

I don't think an formatting plugin exists ATM, but there has been
interest in creating one. I imagine this would be exposed as an nREPL
function if it ever happens.

guns

[Chris Ford]

Thanks for your help. Joining lines goes a long way to remove the annoyance anyway.

Chris