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RBS, Ruby’s new type signature language

(developer.squareup.com)
511 points mootrichard | 1 comments | 29 Jul 20 18:04 UTC | HN request time: 0.207s | source
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setpatchaddress ◴[29 Jul 20 20:01 UTC] No.23990944[source]▶
I'm really puzzled by the decision to use a separate file for this. The stated justification ("it doesn't require changing Ruby code") doesn't make sense, and my personal experience with languages with external type specifications is strongly negative. It's an unbelievable pain to keep multiple interface files in sync over time.

`.h` files are not something to emulate! External interfaces should be generated by tools where needed.

replies(5): >>23991001 #>>23991013 #>>23991258 #>>23991289 #>>23994203 #
1. mekster ◴[29 Jul 20 20:34 UTC] No.23991289[source]▶
Right. TypeScript also doesn't require changing files and everything is opt in but you can add them inline.

If the author thinks that's the biggest benefit, I'm inclined to think the ruby community doesn't seem to have enough eyes these days in the core development.