> On Apr 11, 2019, at 7:17 AM, Boris Kolpackov <boris_at_codesynthesis.com> wrote:
>
> Nathan Sidwell <nathan_at_acm.org> writes:
>
>> How often do you expect the boost headers to change?
>
> What if it's not Boost but my own headers?
>
> It seems there is still an assumption that header modules
> will only be used for legacy/system stuff (even though
> "legacy" has been dropped from their name).

That is indeed the primary purpose of the feature.

> But I don't
> see a reason why someone would not want to use them for
> own, actively-developed headers to speed up compilation
> in cases where switching to "real" modules is not (yet)
> possible (for example, because one has to support older
> compilers).

That still falls under the “transition” banner.

— Gaby

>