struct withProtectedClose {

  ~withProtectedClose() {
    // Do some cleanup here...
  }
};

void test() {
  withProtectedClose close;

  // Do some work before closing
}

test.cpp: In function `void test()':
test.cpp:28: warning: unused variable 'close'

struct __attribute__ ((__unused__)) withProtectedClose

withProtectedClose close;
(close);