/in/foo.cc: In function 'int main()':
/in/foo.cc:28:14: error: expected primary-expression before '==' token
    if (state == kNum) {
              ^~
/in/foo.cc:34:14: error: expected primary-expression before '==' token
    if (state == kNum) {
              ^~
/in/foo.cc:40:14: error: expected primary-expression before '==' token
    if (state == kNum) {
              ^~