Function delete_at_cursor

subprojects/llama.cpp/common/console.cpp:454–480

    static void move_to_line_end(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line);

    static void delete_at_cursor(std::string & line, std::vector<int> & widths, size_t & char_pos, size_t & byte_pos) {
        if (char_pos >= widths.size()) {
            return;
        }

        size_t next_pos = next_utf8_char_pos(line, byte_pos);
        int w = widths[char_pos];
        size_t char_len = next_pos - byte_pos;

        line.erase(byte_pos, char_len);
        widths.erase(widths.begin() + char_pos);

        size_t p = byte_pos;
        int tail_width = 0;
        for (size_t i = char_pos; i < widths.size(); ++i) {
            size_t following = next_utf8_char_pos(line, p);
            put_codepoint(line.c_str() + p, following - p, widths[i]);
            tail_width += widths[i];
            p = following;
        }

        for (int i = 0; i < w; ++i) {
            fputc(' ', out);
        }

        move_cursor(-(tail_width + w));
    }

    static void clear_current_line(const std::vector<int> & widths) {
        int total_width = 0;