Class iteration_proxy

lesson6-Segmentation/json.hpp:3929–3951

/// proxy class for the items() function
template<typename IteratorType> class iteration_proxy
{
  private:
    /// the container to iterate
    typename IteratorType::reference container;

  public:
    /// construct iteration proxy from a container
    explicit iteration_proxy(typename IteratorType::reference cont) noexcept
        : container(cont) {}

    /// return iterator begin (needed for range-based for)
    iteration_proxy_value<IteratorType> begin() noexcept
    {
        return iteration_proxy_value<IteratorType>(container.begin());
    }

    /// return iterator end (needed for range-based for)
    iteration_proxy_value<IteratorType> end() noexcept
    {
        return iteration_proxy_value<IteratorType>(container.end());
    }
};
// Structured Bindings Support
// For further reference see https://blog.tartanllama.xyz/structured-bindings/
// And see https://github.com/nlohmann/json/pull/1391