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Re: Some performance questions.

From: Ergus
Subject: Re: Some performance questions.
Date: Thu, 9 Feb 2023 16:45:02 +0100

Hi Eli:

On Thu, Feb 09, 2023 at 03:46:49PM +0200, Eli Zaretskii wrote:
Date: Thu, 9 Feb 2023 12:49:28 +0100
From: Ergus <spacibba@aol.com>

1) The new c-ts-mode-indent-style is a bit confusing for a cc-mode

That is strange, since it's supposed to support (a subset of) the same
styles that CC mode support, including the default GNU style.

Yes, but in cc-mode it was possible (and pretty simple) to modify or
create new styles. There are plenty of styles around modifying existing
ones (google-c-style for example).

In the new ts-mode looks like it is possible to do so, but the syntax
and the names are a bit tricky. For example in cc-mode there was the
c-set-offset command, very useful for small changes and to know which
indentation syntactic element was at point. So with that information the
user only needs:

(c-offsets-alist (inline-open . 0)
                 (arglist-close . 0)
                 (innamespace . [0])
                 (access-label '-)

to increase, decrease or set the indentation to zero.

That's why just some equivalences or examples may be very helpful to
ease the transition.

could you add some similar/equivalent examples than the ones in the
cc-mode documentation in order to extrapolate/translate?


Is it possible to use add examples of equivalent implementations between
c-offsets-alist and c-ts-mode-indent-style.

This is supposed to work via indentation styles, see below.

The idea is to modify one of the existing styles or create new ones. Se

2) In case the user wants to modify an indentation style, is it possible
to use another existing style and use it as base template like
c-add-style does?

See c-ts-mode-set-style (bound to "C-c .", as in CC mode) and

I mean, tweak details... like the inheritance we do in c-add-style, not
set a completely different one.

(c-add-style "mylinux"
               '("linux"              <-
                 (tab-width . 4)
                 (c-basic-offset . 4)
                 (fill-column . 80)

3) Which of the cc-hooks (c-hanging-braces-alist, c-cleanup-list and
c-hanging-semi&comma-criteria) is already possible to reproduce with ts?
some example please :(

Please describe the behavior you want to see and didn't see in
c-ts-mode, the CC mode variables are not used in c-ts-mode.

I know they are not. I asked for some kind of equivalence (if available)
because I don't know if they were already implemented somehow.

c-hanging-braces-alist: Controls the insertion of newlines before and after 

c-cleanup-list: Basically for the opposite, to remove some auto inserted
new lines next to braces (for example to have things like '} else {' or

c-hanging-semi&comma-criteria For a similar behavior but with
semi-colons and other cases.

4) Is it possible already (I am sure that in the future they will), to
create behaviors like c-lineup-arglist,
c-lineup-arglist-intro-after-paren, or c-snug-do-while?

Again, please request features.  I'm not sure I even know what these

Thanks. I will do, but there are multiple things and I don't want to be
too (even more) pedantic, so I one by one...


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