Allow partial for intersect_dense_pruned

[pkufool]

No description provided.

[geoph9]

Is there any plan to add the allow_partial option on intersect and intersect_device? I am doing whole lattice rescoring with a 4-gram LM, and for some reason the lattice for some of the utterances does not have any final states and hence k2.connect(lattice) outputs an empty Fsa.

I have tried increasing the beam size to no avail. I think a workaround would be to allow partial paths, i.e. if not final states are encountered in a lattice then we assume that all states on the last frames are final.

[pkufool]

Is there any plan to add the allow_partial option on intersect and intersect_device? I am doing whole lattice rescoring with a 4-gram LM, and for some reason the lattice for some of the utterances does not have any final states and hence k2.connect(lattice) outputs an empty Fsa.

I have tried increasing the beam size to no avail. I think a workaround would be to allow partial paths, i.e. if not final states are encountered in a lattice then we assume that all states on the last frames are final.

Yes, I think it is doable, @danpovey what do you think?

[danpovey]

Thanks!
I am surprised this didn't already have an allow_partial option.

[pkufool]

Merging now, I found the failed tests (mainly windows build) existed for several months, we should fix it in a separate PR.