Re: [boost] Reforming Boost.System and <system_error> round 2

Subject: Re: [boost] Reforming Boost.System and <system_error> round 2
From: Andrzej Krzemienski (akrzemi1_at_[hidden])
Date: 2018-01-16 16:10:27

2018-01-16 17:05 GMT+01:00 Andrey Semashev via Boost <boost_at_[hidden]>
:

> On 01/16/18 18:56, Olaf van der Spek via Boost wrote:
>
>> On Mon, Jan 15, 2018 at 10:18 PM, Niall Douglas via Boost
>> <boost_at_[hidden]> wrote:
>>
>>> Question: is this still considered too much overhead? Note that there is
>>> no longer ANY proposed breaking change with existing code. This is now
>>> 100% enhancement only.
>>>
>>
>> Can't the is_error bool be stored in the ec object itself, at
>> construction time?
>>
>
> Actually, I like this idea. I've modified my benchmark accordingly and it
> shows nearly identical performance as the current `std::error_code`:
>
> Experimental test: 253654 usec, 394237820.022550 tests per second
> Experimental2 test: 46353 usec, 2157357668.327832 tests per second
> std test: 45981 usec, 2174811335.116679 tests per second

This is now getting closer to Boost.outcome, isn't it?

Regards,
&rzej;