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See https://sourceware.org/bugzilla/show_bug.cgi?id=27653

See merge request !1377

Sebastien Ponce authored 2 years ago and Marco Clemencic committed 2 years ago

Separated RootHistogramSinkBase from RootHistogramSink so that this part is reusable for other sinks

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Closes #237

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Closes #233

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This allows to instantiate arrays of histos in a single line, and still define custom names and titles :
  HistogramArray<Gaudi::Accumulators::Histogram<2>,10> m_tae_crate
      {this, "crate{}", "Crate {}", {3600, 0, 3600}, {3600, 0, 3600}};
will create 10 2D histograms with names/titles "crate1/Crate 1", "crate2/Crate 2", ...
While :
  HistogramArray<Gaudi::Accumulators::WeightedHistogram<1>,5> m_tae_window
      {this,
       [](int n) { return ...; }, // build histo name from index
       [](int n) { return ...; }, //build histo title from index
       {11, -5, 6}};
creates 5 1D weighted histograms with custom names and titles