[slime-devel] configuring macro indentation

[Alistair Gee]

On Sun, Sep 25, 2011 at 7:42 AM, Paulo Madeira <acelent at gmail.com> wrote:

> 2011/09/23 Alistair Gee:
> > I am using the latest version of slime from cvs. I noticed that macros
> such
> > as iter (from the iterate package) indents differently now than
> sometime in
> > the past.
> >
> > Current indentation:
> >
> > (iter (for i below 3)
> >   (collect i))
> >
> > Old indentation:
> >
> > (iter (for i below 3)
> >       (collect i))    ; "collect" is lined up with "for"
> >
> > An example with a macro from the clsql package:
> >
> > Current indentation:
> >
> > (clsql:with-default-database (db)
> >                              (progn))
> >
> > Old indentation:
> >
> > (clsql:with-default-database (db)
> >   (progn)) ; &body is indented 2 spaces
> >
> > How do I configure slime to indent with the older styles?
> > My .emacs has:
> > (slime-setup '(slime-fancy
> >                slime-asdf
> >                slime-sprof
> >                slime-compiler-notes-tree
> >                slime-hyperdoc
> >                slime-mdot-fu
> >                slime-mrepl
> >                slime-indentation
> >                slime-repl))
>
> The old behaviour depended solely on the Emacs side of things.
>
> The `iter' form didn't actually indent the `collect' form with the
> `for' form on purpose, it indented just like it would any other
> function call.
>
> The `with-default-database' form has a first element whose name starts
> with "with-", a very common prefix for macros with a body, so it was
> assumed and indented as such.
>
> When connected to lisp, the new indentation mechanism can detects
> `&body' arguments.
>
> If you add a newline right before the `for' form, you'll see it's
> indented at 2, because `iter' has a single `&body' arguments.
>
> The `with-default-database' has a `&rest' argument, so it's not
> indented like a body.
>
> The best solution would be to update clsql to declare the macro
> argument as `&body'. One workaround is to add something like this to
> your Emacs init.el (note: I didn't actually test this):
>
> (put 'with-default-database
>     'common-lisp-indent-function
>     1)
>
> Paulo Madeira
>

Thanks for the help. Your workaround for with-default-database works. I am
also now using the following workaround for iter:

(put 'iter 'common-lisp-indent-function '(&lambda))
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