All,
Boost/boostlib 1.91 changes to boost::optional broke the build of
https://aur.archlinux.org/packages/mongodb44
Most of these issues I can fix, but I'm stuck on this one unsure how
to resolve the issue. (so I'm raising the white-flag for help) The error is:
src/mongo/db/catalog/coll_mod.cpp:361:32:
error: converting to 'boost::optional<mongo::ViewDefinition>'
from initializer list would use explicit constructor
'constexpr boost::optional<T>::optional(U&&) [
with U = mongo::ViewDefinition&;
typename std::enable_if<std::is_constructible<T, U&&>::value,
bool>::type <anonymous> = false;
typename std::enable_if<(!
boost::optional_detail::is_typed_in_place_factory<FT>::value),
bool>::type <anonymous> = false;
typename std::enable_if<(!
boost::optional_detail::is_in_place_factory<FT>::value), bool>::type
<anonymous> = false; T = mongo::ViewDefinition
]'
The code at issue is:
boost::optional<ViewDefinition> view;
if (db && !coll) {
const auto sharedView = ViewCatalog::get(db)->lookup(opCtx,
nss.ns());
if (sharedView) {
// We copy the ViewDefinition as it is modified below to
represent the requested state.
view = {*sharedView};
}
}
There were changes to boost::optional for c++17 at
https://www.boost.org/releases/1.91.0/ and I think I've tracked the
issue to https://stackoverflow.com/q/72712318/3422102 and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109247, but even with that
information I'm still not sure how to use that information to resolve
the constructor selection issue. The A/B test cases in the SO question
leave me scratching my head on how that applies here, if it does?
I've opened an Arch forum thread to discuss the issue.
https://bbs.archlinux.org/viewtopic.php?pid=2295971#p2295971 The full
error and additional information on the problem is posted there.
If you can help, please join me there. I've included a header
inclusion patch for a preliminary standard_assert issue in the forum
thread if you would like to build to error to confirm. (it's a big
build, it fails at about 30 minutes of a 45 minute build)
--
David C. Rankin, J.D.,P.E.
