Unordered container as first tuple member confuses Meta

[hahnjo]

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Description

With std::tuple<std::unordered*, there are missing data members

Reproducer

root [0] TClass::GetClass("std::tuple<int, int>")->GetListOfDataMembers()->Print()
Collection name='TListOfDataMembers', class='TListOfDataMembers', size=2
 OBJ: TDataMember       _1
 OBJ: TDataMember       _0
root [1] TClass::GetClass("std::tuple<std::set<int>, int>")->GetListOfDataMembers()->Print()
Collection name='TListOfDataMembers', class='TListOfDataMembers', size=2
 OBJ: TDataMember       _1
 OBJ: TDataMember       _0
root [2] TClass::GetClass("std::tuple<std::unordered_set<int>, int>")->GetListOfDataMembers()->Print()
Collection name='TListOfDataMembers', class='TListOfDataMembers', size=1
 OBJ: TDataMember       _0

Same with std::unordered_map<int, int>, while std::set<int> and std::map<int, int> seem to be fine.

ROOT version

master

Installation method

from source

Operating system

Linux

Additional context

No response