unget()

template<typename BasicJsonType , typename InputAdapterType >

void nlohmann::detail::lexer< BasicJsonType, InputAdapterType >::unget ( )

inlineprivate

unget current character (read it again on next get)

We implement unget by setting variable next_unget to true. The input is not changed - we just simulate ungetting by modifying chars_read_total, chars_read_current_line, and token_string. The next call to get() will behave as if the unget character is read again.

Definition at line 7979 of file json.hpp.

    {
        next_unget = true;
        --position.chars_read_total;
 
        // in case we "unget" a newline, we have to also decrement the lines_read
        if (position.chars_read_current_line == 0)
        {
            if (position.lines_read > 0)
            {
                --position.lines_read;
            }
        }
 
        else
        {
            --position.chars_read_current_line;
        }
 
        if (JSON_HEDLEY_LIKELY(current != std::char_traits<char_type>::eof()))
        {
            JSON_ASSERT(!token_string.empty());
            token_string.pop_back();
        }
    }