On Wed Nov 26, 2025 at 9:31 AM JST, John Hubbard wrote:
> On 11/25/25 3:59 PM, Timur Tabi wrote:
>> On Mon, 2025-11-17 at 18:10 -0500, Joel Fernandes wrote:
>>> // First define trait
>>> pub(crate) trait FalconUCodeDescriptor {
>>> fn imem_load_size(&self) -> u32;
>>> fn dmem_load_size(&self) -> u32;
>>> fn engine_id_mask(&self) -> u16; // V3-only field, V2 returns 0
>>> ...
>>> }
>>
>> Isn't it more idiomatic for engine_id_mask() (and any other field that
>> exists only on one version)
>> to return an Option<u16>?
>
> I don't know about idiomatic-ness here, but we have been trying hard
> to avoid Option in fields. It really makes a mess of things.
>
> Other approaches require less special casing, we've found.
IIUC Timur's proposal would not require an Option as a field, just that
the method returns one. I tend to agree that this is more idiomatic.
