/in/foo.cc: In function 'int main()':
/in/foo.cc:78:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   78 |     auto [cy, cm, cd] = parseDate(currentDate);
      |          ^
/in/foo.cc:89:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   89 |         auto [by, bm, bd] = parseDate(baseDate);
      |              ^
/in/foo.cc:101:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  101 |         auto [y, m, d] = daysToDate(day);
      |              ^