CondFormats/HcalObjects/interface/HcalObjectAddons.h - master - githubmirror/cmssw

CondFormats/HcalObjects/interface/HcalObjectAddons.h

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24 май 2019, 00:14

24 май 2019, 00:14ecf11e6

#ifndef CondFormats_HcalObjects_HcalObjectAddons
#define CondFormats_HcalObjects_HcalObjectAddons

#include <vector>
#include <algorithm>

// functions with common forms
namespace HcalObjectAddons {
  template <class Item, class Less>
  const Item* findByT(const Item* target, const std::vector<const Item*>& itemsByT) {
    Less less;
    auto item = std::lower_bound(itemsByT.begin(), itemsByT.end(), target, less);
    if (item == itemsByT.end() || !less.equal(*item, target)) {
      return nullptr;
    }
    return *item;
  }

  //sorting
  template <class Item, class Less>
  static void sortByT(const std::vector<Item>& items, std::vector<const Item*>& itemsByT) {
    itemsByT.clear();
    itemsByT.reserve(items.size());
    Less less;
    for (const auto& i : items) {
      if (less.good(i))
        itemsByT.push_back(&i);
    }
    std::sort(itemsByT.begin(), itemsByT.end(), less);
  }

}  // namespace HcalObjectAddons

#endif