On Sunday, 21 July 2024 at 05:43:32 UTC, IchorDev wrote:

Does this mean that array literals are *always* separately allocated first, or is this usually optimised out?

Not always allocated, see your example below.
I don't quite know what the heuristic is for allocation or not...

For instance, will this example *always* allocate a new dynamic array for the array literal, and then append it to the existing one, even in optimised builds?
```d
void append(ref int[] a){
        a ~= [5, 4, 9];
}
```

https://d.godbolt.org/z/sG5Kancs4

The short array is not dynamically allocated (it's allocated on the stack, or for larger arrays it will be a hidden symbol in the binary image), even at `-O0` (i.e. `-O` was not passed).

-Johan

Reply via email to