/in/foo.cc: In function 'bool isequal(std::string, std::string)':
/in/foo.cc:20:3: error: 'retrun' was not declared in this scope
   20 |   retrun false;
      |   ^~~~~~
/in/foo.cc:22:1: warning: control reaches end of non-void function [-Wreturn-type]
   22 | }
      | ^