xxxxxxxxxx/** Container with internal pointer */struct Container{ long[3] data; void* p; this(int) { p = &data[0]; } this(ref inout Container) inout { p = &data[0]; } /** Ensure the internal pointer is correct */ void check(int line = __LINE__, string file = __FILE__)() { if (p != &data[0]) { import core.stdc.stdio : printf; printf("%s(%d): %s\n", file.ptr, line, "error".ptr); } }}void func(Container c) { c.check(); } // errorContainer get(){ auto a = Container(1); auto b = a; a.check(); // ok b.check(); // ok // no nrvo if (1) return a; else return b;}Container get2()out(r){}do{ auto v = Container(1); v.check(); // ok return v;}void main(){ Container v = Container(1); v.check(); // ok func(v); auto r = get(); r.check(); // error auto r2 = get2(); r.check(); // error Container[1] slit = [v]; slit[0].check(); // error Container[] dlit = [v]; dlit[0].check(); // error auto b = B(v); b.m.check(); // error}struct B{ Container m;}