272   class shared_ptr {  class
277     shared_ptr() : p(0), control(0) {}  in shared_ptr()  function in reference_count::shared_ptr
278     explicit shared_ptr(T *p) : p(p), control(new control_block) {  in shared_ptr()  function in reference_count::shared_ptr
281     shared_ptr(shared_ptr &other) : p(other.p), control(other.control) {  in shared_ptr()  function in reference_count::shared_ptr
285     ~shared_ptr() {  in ~shared_ptr()
296     void swap(shared_ptr &other) {  in swap()
308     shared_ptr<int> a(new int);  in testSingle()
313     shared_ptr<int> a(new int);  in testDouble()
314     shared_ptr<int> b = a;  in testDouble()
319     shared_ptr<int> a(new int);  in testInvalidated()
320     shared_ptr<int> b = a;  in testInvalidated()
323     extern void use(shared_ptr<int> &);  in testInvalidated()
328     shared_ptr<int> a(new int);  in testNestedScope()
330       shared_ptr<int> b = a;  in testNestedScope()
336     shared_ptr<int> a(new int);  in testSwap()
337     shared_ptr<int> b;  in testSwap()
338     shared_ptr<int> c = a;  in testSwap()
339     shared_ptr<int>(c).swap(b);  in testSwap()
345       shared_ptr<int> a(p);  in testUseAfterFree()
346       shared_ptr<int> b = a;  in testUseAfterFree()