[webkit-dev] Style guide should mention that we don't use anonymous namespace

Ryosuke Niwa rniwa at webkit.org
Wed Oct 19 18:24:40 PDT 2011

Also... VC++'s debugger happens to have some issues around unnamed

Don't recall if this affected classes inside unnamed namespace though.

I think VC++ 2005's support for unnamed namespace is better than nested
classes (cl.exe has some serious bugs in resolving nested class names) so if
our only alternative to unnamed namespace is nested classes, then I'd much
prefer unnamed namespace.

Adam, do you recall any compiler/debugger issues with classes inside unnamed
namespace on VC++ 2005?

- Ryosuke

On Wed, Oct 19, 2011 at 4:29 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:

> On Wed, Oct 19, 2011 at 4:00 PM, Darin Adler <darin at apple.com> wrote:
>> On Oct 19, 2011, at 3:58 PM, Ryosuke Niwa wrote:
>> > On Wed, Oct 19, 2011 at 3:51 PM, Darin Adler <darin at apple.com> wrote:
>> >>>  How about classes that are only used in one cpp file? Should we be
>> wrapping those in an anonymous namespace?
>> >> I’d suggest not wrapping them in an anonymous namespace. Debugging
>> tools work better when classes have unique names.
>> >
>> > Has this been a convention we use?
>> I’m not sure how to answer that. I have not used anonymous namespaces in
>> any WebKit code I contributed, and the first case of doing so that I recall
>> was when Adam Barth used some in the HTML parser work.
> Okay. Sounds like it's left to reviewers' and committers' discretions.
> It'll be still nice to give some guidance on when we should and should not
> use anonymous namespaces so that I don't have to engage in a debate on every
> code review.
> I personally don't like anonymous namespaces because VS.net's class view
> separates classes within anonymous namespace from the rest:
> http://goo.gl/2IkzQ (screen shot)
> But I think we've established that we prefer having unique class/function
> names over using anonymous namespaces.
> - Ryosuke
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