How to use D without the GC ?

[bachmeier]

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)`.