/in/foo.cc: In function 'bool has_short_circuit()':
/in/foo.cc:32:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for (int i = 0; i < wire_dirs.size(); i++) {
      |                         ~~^~~~~~~~~~~~~~~~~~
/in/foo.cc:49:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |                 for (int j = 0; j < wire_dirs.size(); j++) {
      |                                 ~~^~~~~~~~~~~~~~~~~~