Geometry/CaloGeometry/interface/EZArrayFL.h - master - githubmirror/cmssw

Geometry/CaloGeometry/interface/EZArrayFL.h

77 строк2 KB

Matti Kortelainen

Make EZArrayFL and EZMgrFL compile with C++20

20 июн 2023, 17:51

20 июн 2023, 17:51cfbb935

#ifndef GEOMETRY_CALOGEOMETRY_EZArrayFL_H
#define GEOMETRY_CALOGEOMETRY_EZArrayFL_H 1

#include "Geometry/CaloGeometry/interface/EZMgrFL.h"

/** \class EZArrayFL<T>

  stl-vector-LIKE Class designed to allow many small fixed-length
  containers to have a common memory managed by a single higher-level object.

  It has the usual common iterators (begin, end) and functions (size, capacity, etc)
  but is NOT actually an STL-vector.

  It practices 'on-demand', or 'lazy evaluation', only allocating
  memory when requested.

*/

template <class T>
class EZArrayFL {
public:
  typedef EZMgrFL<T> MgrType;
  typedef typename MgrType::iterator iterator;
  typedef typename MgrType::const_iterator const_iterator;
  typedef typename MgrType::reference reference;
  typedef typename MgrType::const_reference const_reference;
  typedef typename MgrType::size_type size_type;
  typedef typename MgrType::value_type value_type;

  EZArrayFL() : m_begin(), m_mgr() {}

  EZArrayFL(MgrType* mgr) : m_begin(), m_mgr(mgr) {}

  EZArrayFL(MgrType* mgr, const_iterator start, const_iterator finis)
      : m_begin(0 == finis - start ? iterator() : mgr->assign()), m_mgr(mgr) {
    assert((finis - start) == m_mgr->subSize());
    iterator i(begin());
    for (const_iterator ic(start); ic != finis; ++ic) {
      (*i) = (*ic);
    }
  }

  void resize() { assign(); }

  void assign(const T& t = T()) {
    assert(iterator() == m_begin);
    m_begin = m_mgr->assign(t);
  }

  const_iterator begin() const { return m_begin; }
  const_iterator end() const { return m_begin + m_mgr->subSize(); }

  reference operator[](const unsigned int i) {
    if (iterator() == m_begin)
      assign();
    return *(m_begin + i);
  }

  const_reference operator[](const unsigned int i) const { return *(m_begin + i); }

  bool uninitialized() const { return (iterator() == m_begin); }

  bool empty() const { return (0 == size()); }

  size_type size() const { return m_mgr->subSize(); }

  size_type capacity() const { return size(); }

protected:
private:
  //EZArrayFL( const EZArrayFL& ) ; //stop
  //EZArrayFL& operator=( const EZArrayFL& ) ; //stop
  iterator m_begin;
  MgrType* m_mgr;
};

#endif