Re: CC Mode 5.32.4 (Emacs-Lisp); importance of syntactic context at bol

[Dave A. <da...@bo...>]

on Thu Mar 07 2013, Alan Mackenzie <acm-AT-muc.de> wrote:

> Hi, Dave.
>
> On Tue, Mar 05, 2013 at 06:25:17PM -0800, Dave Abrahams wrote:
>
>> on Tue Mar 05 2013, Alan Mackenzie <acm-AT-muc.de> wrote:
>
>> >> It seems to me that either c-lineup-whitesmith-in-block really ought to
>> >> include that beginning-of-line call in it, or there needs to be some way
>> >> in cc-mode styles to express "what matters here is the syntactic context
>> >> at BOL."
>
>> > The lack of (beginning-of-line) is a bug.  
>
>> Hmm, but isn't it by far the most common case that indentation depends
>> only on the syntax at the beginning of the line?  It seems backward to
>> make 99% of these functions start with (beginning-of-line) when you
>> could instead provide a way to retrieve the previous point for those
>> very few functions that need it.
>
> Yes, but we've got to preserve the (historical) calling conventions,

I wouldn't suggest otherwise

> I don't think there can be any line-up functions which depend on the
> current position in the line, since TAB can be used with point
> anywhere; it would be silly if the indentation depended upon point
> this way.

That was my thinking.  In that case, why not just have cc-mode always go
to the beginning of the line before asking the line-up functions to do
anything?

-- 
Dave Abrahams