Re: Reducing dependency on Boost.Regex

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2023-04-13 08:48:20

On 4/13/23 06:07, Francois Kritzinger via Boost wrote:
> On 2023/03/13 14:07, Andrey Semashev via Boost wrote:
>> On 3/13/23 15:00, Boris Kolpackov via Boost wrote:
>>> A quick note on our experience reducing dependency on Boost.Regex
>>> (and thus ICU) in build2 packages for Boost 1.81.0. Now only the
>>> following (leaf) libraries unconditionally depend on Boost.Regex:
>>>
>>> * Boost.Convert
>>> * Boost.DLL
>>> * Boost.Log
>>
>> Boost.Log can be configured to use std::regex or Boost.Xpressive as an
>> alternative to Boost.Regex.
> 
> However Boost.Log also depends on Boost.Spirit which depends on
> Boost.Regex so that's a hard dependency.

To my knowledge, Boost.Log doesn't use the bits of Boost.Spirit that use
Boost.Regex. This means, if you build Boost.Log that uses e.g.
std::regex internally, it will not link with Boost.Regex.