Re: The new Boost 17.0.0

From: Jeff Garland (azswdude_at_[hidden])
Date: 2020-11-29 16:03:31

On Sun, Nov 29, 2020 at 8:48 AM Mike via Boost <boost_at_[hidden]>
wrote:

>
> But there are imho very reasonable reasons why people ask for a version
> of boost that makes use of c++XX beyond "because it is cool".
>

I can give you a very concrete one -- from_iso_string in date_time.  It's
signature takes a const std::string&.  If I have an std::string_view, then
I have to unnecessarily construct a string to call this function -- which
harms performance and is ugly.  The bit of good news here is that it's easy
to change the signature for c++17 and up to just take string_view (that
covers string too) -- well after some code rewrite and by adding macro
hackery.  But then the issue might be, should I support boost string_view
in older versions and add more macros so I'm not including extra stuff.
The combinatorics of supporting all the options can grow quickly.