ElementLink branch EventInfoAuxDyn.hardScatterVertexLink in PHYSLITE can't be read #1177
Description
There is one remaining issue from #951 - that is a particular ElementLink branch in PHYSLITE files that is not in a vector can't be read at the moment, although the way the data looks like it should be in scope what is supported by uproot:
>>> import uproot
>>> uproot.__version__
5.3.2.dev10+g21735bf.d20240319The issue occurs in the EventInfoAuxDyn.hardScatterVertexLink branch (it has a subbranch with the same name)
>>> import uproot
>>> from skhep_testdata import data_path
>>> filename = data_path("uproot-issue-951.root")
>>> tree = uproot.open({filename: "CollectionTree"})
>>> tree["EventInfoAuxDyn.hardScatterVertexLink/EventInfoAuxDyn.hardScatterVertexLink"].interpretation
<UnknownInterpretation 'none of the rules matched'>Reading it then fails with UnknownInterpretation. The data looks not too strange
>>> tree["EventInfoAuxDyn.hardScatterVertexLink/EventInfoAuxDyn.hardScatterVertexLink"].debug(0, skip_bytes=10, dtype=">i4")
--+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+-
55 209 69 151 0 0 0 0
7 --- E --- --- --- --- ---
936461719 0We can see the key and index fields - matching what we have in all the other ElementLinks that inherit from ElementLinkBase:
>>> [(el.name, el.typename) for el in tree._file.streamer_named("ElementLinkBase").elements]
[('m_persKey', 'unsigned int'), ('m_persIndex', 'unsigned int')]Unfortunately there seems to be no streamer for ElementLink with HardScatterVertices as template argument, maybe that's the issue? Now seeing that i also checked with ROOT and it indeed also doesn't show a type for this branch with TTree::Print:
>>> import ROOT
>>> root_file = ROOT.TFile.Open(filename)
>>> root_tree = root_file.Get("CollectionTree")
>>> root_tree.Print("*EventInfoAuxDyn.hardScatter*")
******************************************************************************
*Tree :CollectionTree: CollectionTree *
*Entries : 50 : Total = 5672587 bytes File Size = 1097771 *
* : : Tree compression factor = 4.80 *
******************************************************************************
*Branch :EventInfoAuxDyn.hardScatterVertexLink *
*Entries : 50 : BranchElement (see below) *
*............................................................................*
*Br 0 :EventInfoAuxDyn.hardScatterVertexLink : BASE *
*Entries : 50 : Total Size= 1839 bytes File Size = 280 *
*Baskets : 1 : Basket Size= 8000 bytes Compression= 4.36 *
*............................................................................*Only shows "BASE"