Lukas Wirth @lukaswirth.dev · Dec 30 1 / 3
rust-analyzer now has some basic* parameter variance inferrence and it shows it on hover! *basic as in it can't handle cyclic dependencies yet for temporary implementation reasons, it also struggles with usages within const arguments.
56 likes 1 replies
?
Replies
Oh wow, this would be awesome info to have in cargo-semver-checks! Imagine: "generic type parameter T used to be covariant but now is invariant, this is a breaking change"