Tell us your DIP1000 woes

[Juraj]

On Sunday, 25 August 2024 at 13:10:22 UTC, Mike Parker wrote:
> Second, we'd like to get a number of examples of problems 
> people have had with using DIP1000 that haven't shown up in 
> Bugzilla. Walter wants to be as certain as he can whether such 
> issues are fixable or if the design is fundamentally flawed.

As stated in my previous reply, I dont have problems with DIP1000 
as I just ignore it, because of bad ergonomics.
But I felt guilty for bashing something I haven't used in years, 
so here is first thing I tried.
All my shenanigans are catched without `-dip1000`.

(I over-use `@safe` just to be sure)

```d
@safe:

     struct S {
         int x;
         S* s_ptr_0;
         S* s_ptr_1;
     }

S* g_ptr = null;
S* goo(return ref S sp) @safe => &sp;

     S foo(int v) @safe {

         S s0 = S(333);
         S s1 = S(v);

         void ez_escape() @safe {
             auto res = goo(s1);
             g_ptr = res;
         }
         ez_escape();

         () @safe {
             S* moo(return ref S sp)@safe  => &sp;
             s1.s_ptr_0 = moo(s0);
         }();

         () @safe {
             S* moo(S* sp)@safe  => sp;
             s1.s_ptr_1 = moo(&s0);
         }();


         return s1;
     }
```