Re: How to use D without the GC ?

[bachmeier via Digitalmars-d-learn]

On Wednesday, 12 June 2024 at 18:36:26 UTC, Vinod K Chandran 
wrote:
On Wednesday, 12 June 2024 at 15:33:39 UTC, bachmeier wrote:
A SafeRefCounted example with main marked @nogc:
```
import std;
import core.stdc.stdlib;

struct Foo {
  double[] data;
  double * ptr;
  alias data this;

  @nogc this(int n) {
    ptr = cast(double*) malloc(n*double.sizeof);
    data = ptr[0..n];
    printf("Data has been allocated\n");
  }
 }

```

Why not just use `ptr` ? Why did you `data` with `ptr` ?

Try `foo[10] = 1.5` and `foo.ptr[10] = 1.5`. The first correctly 
throws an out of bounds error. The second gives `Segmentation 
fault (core dumped)`.