Shared

1 int dtor;
2 static struct S
3 {
4     int value;
5     int* dtor;
6     @disable this(this);
7 
8     ~this() @nogc nothrow
9     {
10         if(dtor)
11             (*dtor)++;
12     }
13 }
14 
15 // Simple
16 {
17     auto a = S(200, &dtor).makeShared;
18 }
19 assert(dtor == 1);
20 dtor = 0;
21 
22 // Copying
23 {
24     auto a = S(200, &dtor).makeShared;
25     auto b = a;
26 }
27 assert(dtor == 1);
28 dtor = 0;
29 
30 // Copying over existing
31 {
32     auto a = S(200, &dtor).makeShared;
33     auto b = S(400, &dtor).makeShared;
34     b = a;
35 }
36 assert(dtor == 2);
37 dtor = 0;
38 
39 // Null assign
40 {
41     auto a = S(200, &dtor).makeShared;
42     a = null;
43     assert(dtor == 1);
44 }
45 
46 // Access
47 {
48     auto a = S(200, &dtor).makeShared;
49     auto b = a;
50 
51     b.access((scope ref v)
52     {
53         v.value *= 2;
54     });
55     assert(a.ptrUnsafe.value == b.ptrUnsafe.value);
56     assert(a.ptrUnsafe.value == 400);
57 }