Associative arrays
Steven Schveighoffer
schveiguy at gmail.com
Tue May 18 14:36:43 UTC 2021
On 5/18/21 9:04 AM, Adam D. Ruppe wrote:
> On Tuesday, 18 May 2021 at 12:57:01 UTC, Steven Schveighoffer
>> Let's make that 2 arrays (static or stack-allocated dynamic) to avoid
>> the vararg template cost.
>
> That's good for current AAs, but it can't do the heterogeneous types.
>
> Of course that's illegal in D right now anyway I'm just holding out hope
> for an expansion for json literals w/o explicit constructors on each
> element too. :)
>
> but yeah that'd work just fine too.
Hm... that does kind of make sense. I was thinking maybe you could
specify the type of key to be something that accepts multiple
constructor values (like translate to Json(val)) but then the expression
isn't self-contained, it has to look at what it's being assigned to
(which also is a possibility, after all, AA literal assignment can get
type hints from the thing it's being assigned to).
I hope there's some way to avoid paying the variadic template penalty
tax, which would be pretty heavy if you had a large literal (not uncommon).
-Steve
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