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