On Fri, Nov 03, 2023 at 15:13:26 +0100, Daniela Engert via SG15 wrote:
> Am 03.11.2023 um 14:11 schrieb Boris Kolpackov via SG15:
> > Michael Spencer <bigcheesegs_at_[hidden]> writes:
> >
> >> On Fri, Nov 3, 2023 at 12:43 AM Boris Kolpackov <boris_at_[hidden]>
> >>
> >>> #ifdef VERSION
> >>> export module version;
> >>> #else
> >>> export module final;
> >>> #endif
> >>>
> >> This is already banned by the grammar. You can't have an if-group that
> >> spans a pp-module.
> > Surprising, but it seems this indeed was banned by P1857. FWIW, neither
> > GCC 13 nor Clang 17 enforce this.
>
> MSVC doesn't either unless you prepend the example with line "module;".
> In this case MSVC refuses to accept the conditionally compiled module
> declarations. I have an open bug on DevCom for the non-conforming behaviour.

Is there a link so that others may track it as well (though I suspect it
may be behind permission guards)?

--Ben