https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108317
Bug ID: 108317
Summary: g++ is unable to capture vector-extended variables
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: janezz55 at gmail dot com
Target Milestone: ---
Created attachment 54204
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54204&action=edit
sample file demonstrating the bug
g++ will be unable to capture v_ in the code sample below, but clang++ will do
so just fine.
template <std::size_t M>
auto operator+(pint<T, M> const& o) const noexcept
{
pint r;
[&]<auto ...I>(std::index_sequence<I...>) noexcept
{
bool c;
(
[&]() noexcept
{
if constexpr(I)
{
r.v_[I] = c + v_[I] + (I < M ? o.v_[I] : T{});
c = c ? r.v_[I] <= v_[I] : r.v_[I] < v_[I];
}
else
{
c = (r.v_[I] = v_[I] + o.v_[I]) < v_[I];
}
}(),
...
);
}(std::make_index_sequence<N>());
return r;
}
error: 'v_' was not declared in this scope
