[LLVMdev] [cfe-dev] C++11 reverse iterators (was C++11 is here)

[Chandler Carruth]

On Sun, Mar 2, 2014 at 10:13 PM, Saleem Abdulrasool
<compnerd at compnerd.org>wrote:

> On Sun, Mar 2, 2014 at 9:26 PM, Chris Lattner <sabre at nondot.org> wrote:
>
>>
>> On Mar 2, 2014, at 8:53 PM, Renato Golin <renato.golin at linaro.org> wrote:
>>
>> > On 3 March 2014 12:32, Pete Cooper <peter_cooper at apple.com> wrote:
>> >> Would those work with a foreach construct? Perhaps I forgot to mention
>> that was what I'm trying to work out here.
>> >>
>> >> In example 3 I was wondering if we could define a method reverse(). We
>> could use sfinae to wrap that around rbegin/rend if people like that style?
>> >
>> > Sorry, I was too terse... ;)
>> >
>> > If MF is a reverse_iterator, it'd just work, no? But to get the
>> > reverse iterator, I think reverse() would be the best general pattern,
>> > since you can adapt it to each container needs.
>>
>> I'm not aware of the prior art or standards are here, but I think that a
>> global reverse() adapter is the way to go.  Likewise, we should have a
>> standard "enumerate()" adaptor like python.
>
>
> I definitely prefer the global adaptor pattern.  As for prior art, I had
> played with it a bit, and came up with
> https://gist.github.com/compnerd/5694186 a while back.
>

Yea, there is a pretty strong move toward range adaptors. If possible, I'm
going to work on contributing a basic selection of them to LLVM's ADT
specifically to address the immediate needs of range-based for loops.
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