key()

template<typename IteratorType >

const string_type & nlohmann::detail::iteration_proxy_value< IteratorType >::key ( ) const

inline

return key of the iterator

Definition at line 4443 of file json.hpp.

    {
        JSON_ASSERT(anchor.m_object != nullptr);
 
        switch (anchor.m_object->type())
        {
            // use integer array index as key
            case value_t::array:
            {
                if (array_index != array_index_last)
                {
                    int_to_string( array_index_str, array_index );
                    array_index_last = array_index;
                }
 
                return array_index_str;
            }
 
            // use key from the object
            case value_t::object:
                return anchor.key();
 
            // use an empty key for all primitive types
            case value_t::null:
            case value_t::string:
            case value_t::boolean:
            case value_t::number_integer:
            case value_t::number_unsigned:
            case value_t::number_float:
            case value_t::binary:
            case value_t::discarded:
            default:
                return empty_str;
        }
    }