indent style for D

[Iain Buclaw]

On 29 January 2012 14:04, Denis Shelomovskij
<verylonglogin.reg at gmail.com> wrote:
> 29.01.2012 15:21, Alex Rønne Petersen пишет:
>
>> On 29-01-2012 10:15, Gour wrote:
>>>
>>> Hello!
>>>
>>> It was mentioned in #D that gdc will probably adapt its code to GNU code
>>> style and I wonder, seeing no recemmendation in
>>> http://www.d-programming-language.org/dstyle.html in regard to
>>> indent-style, can someone shed some light what is recommended practice
>>> for it within D community?
>>>
>>>
>>> Sincerely,
>>> Gour
>>>
>>
>> Phobos generally uses 4-space indentation.
>>
>
> I don't think there is the best coding style (personally I like both K&R and
> Allman styles). IMHO things are different with indention. Why does Phobos
> use 4-space indentation?
>
> The following article (IMHO) completely covers tabs vs spaces problem:
> http://www.emacswiki.org/cgi-bin/wiki/TabsAreEvil
>
> It shows that tabs (in spite of the article title) are really good and
> should be used always (and only) for indention. Looks like Allman style
> doesn't prevent this (if it does, what is the reason?). So:
> * Such tab using shows respect to a programmer allowing him to configure tab
> size as he prefer.
> * Sometimes indention should be changed for a particular using.
> * Worst of all, sometimes same code is used in different places where
> different indention levels are expected.
> * Using spaces guarantee that code will look same in every editor but it is
> the simplest and not the most convenient way, the code should look _good for
> every editor user_, not _same_, so it tears down our community.
> * It's less comfortable to use spaces for indention in every editor I use
> (at least because spaces allows caret position in the middle of indention
> and pressing <one of delete one char keys> deletes one space instead of the
> indention level, so it's easy to accidentally broke indention and use, e.g.
> 7 instead of 8 spaces).
>
> And this isn't only a theory. In practice:
> * I've never liked 8-chars indention, so I feels myself bad in d-p-l.org
> sources. Probably I'm not the only one.
> * I accidentally brake spaces indention sometimes. Probably I'm not the
> less-trained-in-printing one.
> * Some time ago a ebook version of d-p-l.org has been created. Walter had to
> change every 4-spaces indention in examples to 2-spaces indention for
> convenience reading on small PPC screen.
> * Now everyone see 2-spaces indented examples in d-p-l.org instead of his,
> probably, preferred 4-spaces indented.
>
> Am I mistaken? If no, am I missing some major spaces advantages? If no, lets
> use tabs. Perhaps, there is no tool that will convert (convert right, not
> somehow, see article) tabs<->spaces in D code.

The problem is lines with mixed tabs and spaces, and different users
set their text editors see tabs differently. ie: is your tab-width set
to 2, 3, 4, or 8?

-- 
Iain Buclaw

*(p < e ? p++ : p) = (c & 0x0f) + '0';