On: RBS, Ruby’s new type signature language

[cutler]

Surely a good IDE such as RubyMine would be able to display the type in reponse to, say, a mouseover?

[derwiki → cutler]

RubyMine tries but it certainly works less well than PyCharm and GoLand.

[vidarh → derwiki]

But that is because it lacks type information. With type information added via RBS (or whatever other mechanism), they'd be able to parse that.

[imhoguy → derwiki]

Go is statically typed.

[d3nj4l → derwiki]

RubyMine works great if you add yard type docs to your code.

[Lio → d3nj4l]

Is it checking those types or just reporting then?

I’ve seen so many instances where yard doc has the wrong return type or misses a return type that I rarely trust it.

[d3nj4l → Lio]

It doesn't do typechecks, no. You can use solargraph (https://github.com/castwide/solargraph) for that.