llvm dev - Mar 2014 - [LLVMdev] C++11 reverse iterators (was C++11 is here)

On 1 March 2014 19:24, David Chisnall <David.Chisnall at cl.cam.ac.uk>
wrote:
> for (auto V : X.foo()) {
>         ...
> }
+1

--renato

Sent from my iPhone
> On Mar 1, 2014, at 2:06 PM, Renato Golin <renato.golin at linaro.org>
wrote:
> 
>> On 1 March 2014 19:24, David Chisnall <David.Chisnall at
cl.cam.ac.uk> wrote:
>> for (auto V : X.foo()) {
>>        ...
>> }
It would also be good to agree on a way to handle reverse iterators, especially
on those which already use begin() and end() for going forwards.  For example

For (auto& bb : MF)

Will iterate the BBs in a machine function forwards. How should we do it
backwards? Whatever we choose should be the standard across other similar
classes of this in different parts of the code base. I have 3 potential answers
which are all quite similar.

1: for (auto& bb : MF.reverse())
2: for (auto& bb : MF.r_bb())
3: for (auto& bb : reverse(MF))

Personally I like 1 but I'm open to suggestions. Arguably 3 could also use 1
is people liked both. 2 is more explicit about what's going on but I
don't like the style too much.

Pete
> 
> +1
> 
> --renato
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On 3 March 2014 12:13, Pete Cooper <peter_cooper at apple.com>
wrote:
> It would also be good to agree on a way to handle reverse iterators,
especially on those which already use begin() and end() for going forwards.  For
example
rbegin() and rend()?

--renato