On Tuesday, 4 October 2022 at 18:18:41 UTC, Ali Çehreli wrote:
A related topic is how the "end slice" never loses that
capacity:
void main() {
auto a = [ 1, 2 ];
auto b = a;
assert(a.capacity != 0);
assert(b.capacity != 0);
b.length--;
assert(b.capacity == 0);
assert(a.capacity != 0); // <-- Preserved
}
Aside: .capacity is an expensive operation that requires some
levels of table lookups in the druntime. A data structure would
benefit a lot if it kept its own capacity as a member variable.
I've now made a pull to document this:
https://github.com/dlang/dlang.org/pull/3445
