[Eval] Dereference members of a class/struct

[kuilpd]

No description provided.

[kuilpd]

I'm not sure, if this is a right fix, because I don't quite understand what is this check, it wasn't there in lldb-eval:

if (node->valobj())

The tests this patch fixes pass this check, so dereferencing the result works. However, for the same tests just calling EvaluateMemberOf also works, because the dereference happens there, which seems like what we're supposed to do, evaluate a member.
For example, this test also passes this if check, but since this also requires evaluating a member, which is not called in this if branch, so the test fails:

(&c_arr[1])->field_

But in these test it works just fine:

ptr_node->value
ptr_node->next->value

[cmtice]

This fix looks fine. I updated the original lldb-eval code a bit so that sometimes, while parsing, the actual ValueObject for the member field can be identified and bundled into the MemberOf node. In that case there's no point in calling EvaluateMemberOf, as we've already found the member Value Object, so we just return it. But, as you noted, we should check to see if it's a reference type and, if so, dereference it.