Re: [Ayatana-dev] C++0x in unity - call for objections

[Sam Spilsbury <smspillaz@xxxxxxxxx>]

On Mon, Jun 13, 2011 at 10:53 PM, Gordon Allott
<gord.allott@xxxxxxxxxxxxx> wrote:
> Hi all,
>
> So C++0x, the latest C++ standard is just about ready for final, and its
> damn sexy. G++ supports it with the -std=x++0x flag but before we go
> ahead and start putting crack in to unity, I'd like to hear reasons that
> we shouldn't start using C++0x stuff like lambda's in unity. speak now
> or I’m gonna add lambda's to everything I see.
>
> I don't expect all of you to have read the C++0x spec, but some
> highlights are:
>
> Type inference with the auto keyword, kind of like vala's var keyword,
> you can negate the need to strongly type a variable if you are not sure
> what a function is going to receive, dangerous, but useful with template
> programming.
>
>
>> auto some_strange_callable_type = boost::bind(&some_function, _2,
> _1,  some_object);
>> auto other_variable = 5; "
>
>

A quick note on auto here:

The fact that we want to use auto isn't a licence to go crazy with it,
instead in the coding style guidelines we will have something like:

// Don't use it here
auto i = 16;
auto j = 16.0;

Only use it when you know very well what your're expecting:

std::list <unity::component::foo::bar::reallylongnamebaz> bazzes;

// Bad
std::list <unity::component::foo::bar::reallylongnamebaz>::iterator it =
bazzes.begin();

// Good!
auto it = bazzes.begin ()

>
> Thoughts, opinions? yay? nay? +1? -1?
> --
> Gordon Allott
> Canonical Ltd.
> 27 Floor, Millbank Tower
> London SW1P 4QP
> www.canonical.com
>
>
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>



-- 
Sam Spilsbury