operator-() [1/2]

template<typename BasicJsonType >

difference_type nlohmann::detail::iter_impl< BasicJsonType >::operator- ( const iter_impl< BasicJsonType > &  other ) const

inline

return difference

Precondition

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

Definition at line 12318 of file json.hpp.

    {
        JSON_ASSERT(m_object != nullptr);
 
        switch (m_object->m_type)
        {
            case value_t::object:
                JSON_THROW(invalid_iterator::create(209, "cannot use offsets with object iterators", *m_object));
 
            case value_t::array:
                return m_it.array_iterator - other.m_it.array_iterator;
 
            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 m_it.primitive_iterator - other.m_it.primitive_iterator;
        }
    }