It seems that connect() is copying its lambda parameter around. That
means that if a lambda capture contains a non-copyable object, like a
unique_ptr, connect() cannot be used:
{
auto ptr = std::make_unique<int>(0);
connect(this, &MyQObject::mySignal,
[ptr = std::move(ptr)]() mutable { });
}
(This is just an example. In reality, ptr would manage something
non-trivial.)
It's useful to have the lambda take ownership of ptr, but currently
that's not possible and we have to resort to shared_ptr. (Which is not
the end of the world, but still.)
Is this a problem the Qt project is aware of and the design is intended,
or is this something that can be considered a defect?
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