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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <memory>
     11 
     12 // unique_ptr
     13 
     14 // Test unique_ptr converting move assignment
     15 
     16 // Can't assign from const lvalue
     17 
     18 #include <memory>
     19 #include <cassert>
     20 
     21 #include "../../deleter.h"
     22 
     23 struct A
     24 {
     25     static int count;
     26     A() {++count;}
     27     A(const A&) {++count;}
     28     virtual ~A() {--count;}
     29 };
     30 
     31 int A::count = 0;
     32 
     33 struct B
     34     : public A
     35 {
     36     static int count;
     37     B() {++count;}
     38     B(const B&) {++count;}
     39     virtual ~B() {--count;}
     40 };
     41 
     42 int B::count = 0;
     43 
     44 int main()
     45 {
     46     {
     47     const std::unique_ptr<B, Deleter<B> > s(new B);
     48     A* p = s.get();
     49     std::unique_ptr<A, Deleter<A> > s2;
     50     s2 = s;
     51     assert(s2.get() == p);
     52     assert(s.get() == 0);
     53     assert(A::count == 1);
     54     assert(B::count == 1);
     55     assert(s2.get_deleter().state() == 5);
     56     assert(s.get_deleter().state() == 0);
     57     }
     58     assert(A::count == 0);
     59     assert(B::count == 0);
     60 }
     61