Selection framework improvements

Olli Luptonrequested to merge
olupton_functor_improvements into master
  • Introduce new "combination of particle" types Sel::ParticleCombination (something like std::tuple<Ts...>) and Sel::ParticleCombinationSpan (something like LHCb::span<std::variant<Ts...>>
  • Retire older, less flexible Phys/SelKernel/SelKernel/TrackCombination.h in favour of Sel::ParticleCombination
  • Simplify functor adapters like SUM, MAX, ... using new Sel::ParticleCombination utilities
  • Fix trivial bug in DistanceOfClosestApproachChi2Cut
  • Reorganise some type_trait helpers
  • Add feature to the ThOr functor interface to allow the compilation (JIT/cache/both) behaviour to be tweaked per-functor
  • Allow the two state-like arguments to LHCb::TrackVertexUtils::vertexChi2() to have different types, and make the function body slightly more generic.
  • Add an extra check to Tr/TrackUtils/tests/src/TestZipInfrastructure.cpp

Should be applied with Phys!734 (merged)

cc: @nnolte

Edited by Olli Lupton

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