foo.cc: In member function 'void MyClass::click()':
foo.cc:18:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<MyStruct>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         for (int i=0; i <q.size(); i++)
      |                       ~~^~~~~~~~~
foo.cc: In member function 'void MyClass::_close()':
foo.cc:32:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<MyStruct>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for(int i=0;i<q.size();i++)
      |                     ~^~~~~~~~~
foo.cc: In member function 'void MyClass::move()':
foo.cc:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<MyStruct>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(int i=0;i<q.size();i++)
      |                     ~^~~~~~~~~

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