Hi
On 2026-07-20 16:55, Bob Weinand wrote:
I just have one more question to the RFC author, which I see in the
implementation, but the RFC is not explicitly noting:
Is it intentional that fetching is repeated?
I would consider that a bug in the implementation, given that the
“Single-Evaluation Guarantee” section mentions:
When the LHS contains sub-expressions, they are evaluated exactly once:
and
This is the same guarantee that ??= provides over $x = $x ?? default,
implemented using the same compile-time memoization mechanism.
Thus if it behaves differently to `??=`, it's a bug in the
implementation :-)
Best regards
Tim Düsterhus
