On Wednesday, 11 October 2023 at 03:15:30 UTC, H. S. Teoh wrote:
On Wed, Oct 11, 2023 at 02:54:53AM +0000, mw via
Digitalmars-d-learn wrote:
Hi,
I want to confirm: in the following loop, is the array literal
`a` vs. `b` stack or heap allocated? and how many times?
void main() {
int[2] a;
This is stack-allocated. Once per call to the function.
int[] b;
This is an empty slice. It can refer to either stack or heap
memory, depending on what's assigned to it.
int i;
While(++i <=100) {
a = [i, i+1]; // array literal
`a` is overwritten in-place once per loop.
How about the temporary array literal on the right hand side?
It's stack / heap allocated? Or it's not in the language
specification, but up to the (optimizing) compiler to decide?
b = [i, i+1];
[...]
A new array consisting of 2 elements is allocated, once per
loop, and assigned to b each time. Any arrays from previous
iterations will be collected by the GC eventually.
T
