First of all: Thank you Marc for raising that topic. Actually it also concerned me quite often, but so far I was to shy to mention this very opinionated topic.

Am 01.06.2016 um 15:44 schrieb Marc Mutz:
> On Wednesday 01 June 2016 15:15:17 Sergio Martins wrote:
>> On Wednesday, 1 June 2016 14:41:30 WEST Marc Mutz wrote:
>>> Hi,
>>>
>>> There seems to have been a silent underground move to uglify the Qt
>>> sources , by using commas to introduce lines
>>> . I have no idea where this came from

I've seen it first at Nokia, but it might be older. Reasoning was to minimize patches and to reduce chance of merge conflicts.

>>> , but it looks butt

Which is highly subjective.

>>> -ugly and it is in violation of http
>>> (http://wiki.qt.io/Qt_Coding_Style#Line_breaks 2nd item: "Commas go at
>>> the _end_ of wrapped lines")
>>
>> I think that refers to function calls and wasn't written with ctor
>> init-lists in mind, but we can improve it so it stops being a violation.
>
> I'm pretty sure it was written with ctor-init-lists in mind, because all of > QtBase uses trailing comma. I only come across the leading comma version in
> new modules.
>
>> Subjective reasons against leading commas:
>> - It's ugly
>>
>> Subjective reasons against trailling commas:
>> - It's ugly
>
> I beg your pardon? Trailing commas are ugly? So where's the text editor that
> folds prose text to have commas on the next line?

Now as we are at bike-sheding:

Yes, when it comes to initializer lists the trailing comma looks ugly to me. Because of the inconsistent two-space indent for the first initializer. Because line starts of are not aligned.

Lets proceed with smart-assing:

Trailing comma violates two very explicit rules:

- operators start at the beginning of the new lines
- 4 spaces are used for indentation

Leading comma:

- fixes those style violations
- reduces patch noise
- reduces inconsistent
- at the cost of maybe violating one rule with unclear scope ("commas go at the end of wrapped lines")


I for my part prefer leading comma.

> Yes, and we should wait for / propose that they do the same change for ctor-
> init-list, too. Not apply some horrible work-around.

By your choice of wording you seem rather upset. For myself I know that I feel upset when my comfort zone gets violate, when someone tries to changes things I grew comfortable with. How are the chances that you are upset just for the very same reason?

Ciao,
Mathias
--
Mathias Hasselmann | mathias.hasselm...@kdab.com | Software Engineer
KDAB (Deutschland) GmbH&Co KG, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt Experts

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