@ArrayBuilder in swift-collections?

[cal (Cal Stephens)]

Some good discussion in this pitch this week about introducing an official @ArrayBuilder implementation to the ecosystem:

Add @ArrayBuilder to the standard library

Hi everyone! We have leveraged @ArrayBuilder-like result builders at Airbnb for many years and have found it to really improve the ergonomics of constructing array values. This is such a common operation that it would be great to include a first-party solution for it in the standard library. Here’s a pitch, what do you think? Will call attention to the slightly orthogonal mini-pitch within this pitch: it would be great to support @ArrayBuilderattributes on properties and functions, rather than …

What’s the process for proposing additions to swift-collections? Is this in scope for the collections package?

Adding an @ArrayBuilder to swift-collections would still accomplish all of the goals from the pitch:

• Initializing array values is such a common operation that this addition will be relevant to many Swift projects.
• Including @ArrayBuilder in a core package like swift-collections enables it to become a standard best practice across the Swift ecosystem.
• Standardizing on a single, high-quality, optimized, official implementation reduces fragmentation and improves the quality of the overall ecosystem.