From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2022-02-15 10:13:33
On 2/15/22 09:56, Emil Dotchevski via Boost wrote:
> On Mon, Feb 14, 2022 at 8:32 PM Gavin Lambert via Boost <
> boost_at_[hidden]> wrote:
>>
>> On 15/02/2022 17:25, Emil Dotchevski wrote:
>>> I know it's why you did it by reference, but this handler can be useful
> for
>>> other libraries also, as well as for e.g. logging, etc. It's a chance
> to do
>>> something before a Boost library throws.
>>
>> Why would such a library call the callback without just using
>> throw_exception itself? And throw_exception guarantees that the
>> boost::exception exists.
>
> To avoid the dependency on boost::throw_exception.
The callback pointer has to live somewhere, as does the default
callback. My understanding is it's Boost.ThrowException, so the
dependency will be there anyway.