key()

template<typename BasicJsonType >

const object_t::key_type & nlohmann::detail::iter_impl< BasicJsonType >::key ( ) const

inline

return the key of an object iterator

Precondition

The iterator is initialized; i.e. m_object != nullptr.

Definition at line 12385 of file json.hpp.

    {
        JSON_ASSERT(m_object != nullptr);
 
        if (JSON_HEDLEY_LIKELY(m_object->is_object()))
        {
            return m_it.object_iterator->first;
        }
 
        JSON_THROW(invalid_iterator::create(207, "cannot use key() for non-object iterators", *m_object));
    }