Re: auto indenting code blocks

[Yuri Khan]

On Sun, Jun 14, 2015 at 5:30 AM, Michael Heerdegen
<michael_heerdegen@web.de> wrote:
> Yuri Khan <yuri.v.khan@gmail.com> writes:
>
>> > Shouldn't `electric-indent-mode' be able to do this?
>> Maybe it should, but it does not for me.
>
>> If I forgo smartparens, then electric-indent-mode does indeed yield
>> the desired sequence:
>
> Then I think someone should make a bug report at the smartparens site
> please:
>
>   https://github.com/Fuco1/smartparens

I do not believe it’s a smartparens bug. Its job in this context is to
add a matching closing brace as soon as an opening brace is inserted.

It’s not an electric-indent-mode bug, either. When a line break is
inserted immediately before a closing brace, it reindents the closing
brace according to the mode and style.

What Sam and I want, however, is, with a single Enter keypress, to
insert *two* line breaks, position the point between them, and indent
everything nicely. This is just a piece of unimplemented
functionality, and we implement it in slightly different but similar
ways. It’s possible we are overlooking some part of smartparens’
functionality, hence this thread.

Actually, the smartparens documentation mentions a facility for adding
hooks on pair insertion:

https://github.com/Fuco1/smartparens/wiki/Permissions#pre-and-post-action-hooks

One of its examples specifically adds two line breaks, positions point
in between, and reindents, but this happens immediately after
inserting a brace, making it inconvenient to insert one-liners.

The final example in the same section adds a hook that runs after a
pair of braces is inserted *and* RET is pressed as the immediate next
action. Which is pretty close to what I want but I think I prefer that
it happen every time I press Enter while in an empty pair of braces,
not only when said pair is newly inserted.

The next section describes a more concise syntax for such insertions:

https://github.com/Fuco1/smartparens/wiki/Permissions#pre-and-post-action-hooks

===
(sp-local-pair 'c++-mode "{" nil :post-handlers '(("||\n[i]" "RET")))
===

Sam, you might also like this:

===
(sp-local-pair 'c++-mode "{" nil :post-handlers '(("||\n[i]" "RET")
("| " "SPC")))
===

(substitute your major mode).


I think I’ll take it for a drive. Michael, thank you for encouraging
me to figure this out.