[iainmerrick]

I’d compare it to e.g. the work on async/await in Rust, where the discussion seems more directly “we like this feature that C# pioneered and JS has adopted, here’s how we plan to adapt it to make it work well with Rust.”

Admittedly, the Rust async/await RFC and the Go contracts proposal both discuss prior art in sections towards the end, so they are actually similar in that respect. Maybe it’s really just a question of tone and messaging, and the particular discussions that tend to end up on HN.

[shaded-enmity]

Fair point, however I think that you're mistaking language design discussion in a closed group of PLT invested people, and a blog post targeted at general audience.

Visiting https://rust-lang.github.io/async-book/ I don't see any mentions of neither C# nor JS. The key difference here is the audience.

[steveklabnik]

The async book is in the process of being re-written; I wouldn't be surprised if a comparison to JS ends up in there, given that we have some significant differences and it really trips up a lot of people who come from JS.