operator[]()

template<typename BasicJsonType >

reference nlohmann::detail::iter_impl< BasicJsonType >::operator[] ( difference_type  n ) const

inline

access to successor

Precondition

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

Definition at line 12347 of file json.hpp.

    {
        JSON_ASSERT(m_object != nullptr);
 
        switch (m_object->m_type)
        {
            case value_t::object:
                JSON_THROW(invalid_iterator::create(208, "cannot use operator[] for object iterators", *m_object));
 
            case value_t::array:
                return *std::next(m_it.array_iterator, n);
 
            case value_t::null:
                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
 
            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:
            {
                if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.get_value() == -n))
                {
                    return *m_object;
                }
 
                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
            }
        }
    }