class Foo {
  bool foo_;
public:
  Foo(bool foo) : foo_(foo) {}

  bool Bar() { return foo_; }
};

int main() {
  std::vector<Foo*> foos;
  foos.push_back(new Foo(false));
  foos.push_back(new Foo(true));
  foos.push_back(new Foo(true));
  foos.push_back(new Foo(true));

  for(std::vector<Foo*>::iterator i = foos.begin(); i != foos.end(); ++ i)
  {
    std::cout << "Bar() = " << (*i)->Bar() ? "true" : "false" << std::endl;
  }

  std::cout << std::endl;

  struct IsBar {
    bool operator() (Foo* foo) {
      return foo->Bar();
    }
  };

  std::remove_if(foos.begin(), foos.end(), IsBar());

  for(vector<Foo*>::iterator i = foos.begin(); i != foos.end(); ++ i)
  {
    std::cout << "Bar() = " << (*i)->Bar() ? "true" : "false" << std::endl;
  }
}