In C I can do the following:

void apply(struct Appearance a) {...}

// usage
apply((struct Appearance) {
    .color = BLACK,
    .strokeWidth = 4
});

Can I do the same in D without creating a struct variable separately?

void apply(Appearance a) {...}

// currently accepts
Appearance a = { color: BLACK, strokeWidth: 4 };
apply(a);

// would like this
apply({ color: BLACK, strokeWidth: 4 });

// or this
apply(Appearance(color: BLACK, strokeWidth: 4)); // other fields are default initialized: strokeOpacity, fillOpacity, etc...

On Tuesday, 11 July 2023 at 15:16:54 UTC, Ki Rill wrote:

// or this
apply(Appearance(color: BLACK, strokeWidth: 4)); // other fields are default initialized: strokeOpacity, fillOpacity, etc...

Ok, this works with DMD v2.103, but does not work with an older version (I had ldc2 installed based on DMD v2.98).

On 7/11/23 11:22 AM, Ki Rill wrote:

// or this
apply(Appearance(color: BLACK, strokeWidth: 4)); // other fields are default initialized: strokeOpacity, fillOpacity, etc...

Yes, I was going to reply that v 2.103 has added (stealthily) named parameters as a partial implementation. Included in this is struct initializers, and constructors and functions that are not templates.

If you are willing to use DMD 2.103 and above, you should be good.

-Steve

On Tuesday, 11 July 2023 at 17:43:43 UTC, Steven Schveighoffer wrote:

N-no way?! The spec makes no mention of them, is it really safe to use them yet?

On 7/28/23 3:35 AM, IchorDev wrote:

It isn't going away. I would wait a bit for libraries, because you don't want to force your users to require such a recent version of the compiler. Using it in an executable is fine.

-Steve

On Friday, 28 July 2023 at 07:35:00 UTC, IchorDev wrote:

The DIP was approved long ago. It was waiting for an implementation.

On Friday, 28 July 2023 at 17:04:33 UTC, bachmeier wrote:

No shit, it felt like an eternity. But it's still not in the spec...?

On Friday, 28 July 2023 at 17:07:37 UTC, IchorDev wrote:

I'd expect it to appear in the spec after there's a real release. This is the first I've heard of it being supported, and it sounds like it's incomplete.

On Friday, 28 July 2023 at 21:07:47 UTC, bachmeier wrote:

https://github.com/orgs/dlang/projects/19

Dennis has been working on this in pieces rather than all at once, as it required modification to multiple parts of the compiler.