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

Subject: Re: [boost] Reforming Boost.System and <system_error> round 2
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2018-01-16 16:05:06

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