xxxxxxxxxximport core.atomic;import core.stdc.stdio;import core.stdc.stdlib;struct S{ static shared int* ptr; this(int i) { ptr = cast(shared int*) malloc(4); *ptr = 1; } this(this) { if (ptr && *ptr) atomicOp!"+="(*ptr, 1); } ~this() { if (ptr && *ptr) atomicOp!"-="(*ptr, 1); } this(int r, int e) { this = sum(r, e); } static S sum(int r, int e) { return S(r + e); } void opAssign(S rhs) { if (ptr && *ptr) atomicOp!"+="(*ptr, 1); }}void main(){ auto s = S(1, 2); // internally opAssign+dtor auto x = s; // copy+postblit { auto y = x; // copy+postblit } // dtor assert(s.ptr && *s.ptr == 2);}