QMapHelper.hpp

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#pragma once
template <typename T>
struct QMapKeyAdaptor
{
  const T& map;
 
  auto begin() const { return map.keyBegin(); }
 
  auto end() const { return map.keyEnd(); }
};
 
template <typename T>
auto QMap_keys(const T& t)
{
  return QMapKeyAdaptor<T>{t};
}