Re: How to replicate an Error: scope variable `old` assigned to `ref` variable `ctx` with longer lifetime?

[Dennis via Digitalmars-d-learn]

On Tuesday, 13 May 2025 at 11:55:21 UTC, matheus wrote:
Unfortunately adding the pointer gives me another error:

I added @safe: and replaced `const` with `auto` because casting 
away const isn't safe. This should do it:

```D
// compile with -preview=dip1000
import std;

@safe:

struct S { int* p; }

void f(ref scope S ctx) {
    auto old = ctx;
    g(ctx);
    ctx = old;
}

void g(ref scope S ctx) {
    S a;
    ctx = a;
}

void main() {
   S i;
   f(i);
}
```