gsDofMapper::findTagged does't work

[hhornik]

The function returns an empty vector even if there are tagged dofs on the given patch.

I believe there are two issues:

1. The input vectors in std::set_intersection should be sorted, while the vector defined by istart and iend is not.
2. The line "si.assign(si.begin(),si.end());" is incorrect, it should be "rvo.assign(si.begin(),si.end());"

[filiatra]

Does it work if you fix these problems?
for the istart, iend you can make a copy and sort it first, just to check if that works.

[hhornik]

Yes, I added this:

std::vector<index_t> patchdofs;
patchdofs.assign(istart, iend);
std::sort(patchdofs.begin(), patchdofs.end());

and fixed the other problem and it works. The only remaining "issue" is, that the function returns global dof indices, while the documentation says they are local indices.