exhaustive VS ionide-vscode-fsharp

This is an analyzer that will catch this: https://github.com/nishanths/exhaustive

I believe it's in golangci-lint.

I agree linters in general are quite useful for Go though. The default suite from golangci-lint is quite good. I would also recommend enabling exhaustive if you're working with a codebase that uses "enums" (full disclosure, I contributed a bit to that project).

there’s a linter for exhaustive matching: https://github.com/nishanths/exhaustive

I tried to find that linter and found this: exhaustive

And in Go you'd use a linter, like this one.

this is AST go vet analyzer that performs just that: https://github.com/nishanths/exhaustive (too bad it can not do struct based enums..)

>> the main thing missing from Go is ADT's. After using these in Rust and Swift, a programming language doesn't really feel complete without them

What are the differences between an ADT (plus pattern matching i’d reckon?) in Rust/Swift vs the equiv in Go (tagged interfaces + switch statement)?

One has exhaustive matching at compile time, the other has a default clause (non exhaustive matching), although there’s an important nub here with respect to developer experience; it would be idiomatic in Go to use static analysis tooling (e.g. Rob Pike is on record saying that various checks - inc this one - don’t belong in the compiler and should live in go vet). I’ve been playing with Go in a side project and using golint-ci which invokes https://github.com/nishanths/exhaustive - net result, in both go and rust, i get a red line of text annotated at the switch in vscode if i miss a case.

Taking a step back, there isn’t a problem you can solve with one that you can’t solve with the other, or is there?

To take a step further back, why incomplete?

Use a linter.

For an exhaustive linter, were you referring to this? It looks pretty nice. If it's possible to check this with static analysis, is it something that could be in the compiler itself in the future?

https://github.com/nishanths/exhaustive

here, have fun. You’re gonna write some tests, make new types to satisfy interfaces for testing, and then wind up with branches for your test paths in your live code, but go for it, I guess. You know everything! I am but a simple blubbite, too dim, too dim to get it.

I'd love to see something similar to Microsoft's Ionide project or for JetBrains to invest in IDE support.

> Pretty good, https://ionide.io

It pains me to admit it because I really like F# but, with due respect to the developers, Ionide and its related projects are the most unstable toolchain I've ever used.

Spend half a day reloading the editor because the extension keeps hanging on non-trivial MSBuild only to discover that the formatter has truncated in half one of the files you worked on due to a soundness bug. (OCaml's editor support, in contrast, is quite stable.)

Rider is the best editing experience I've had with F#, by far.

I know it's a recurring topic but it's reaching a high level of pain *again* (see NET SDK 6.0.400 and 7.0.100 previews don't currently work with Ionide).

I don't disagree but it owes a lot of that to OCaml. That said, since we're talking about C#, F# and VS Code I'm gonna talk about a pet peeve I have. If you open a C# project in VS Code when the "Ionide" (basically the F# plugin for Code) is installed then Ionide thinks it's a F# project and will open some F# stuff after a few seconds (or prompt you to setup some F# stuff in its gitignore). The root cause has been identified (plugin activates when it sees a ".sln" file), a PR have been opened and rejected with no mention as to why (https://github.com/ionide/ionide-vscode-fsharp/pull/1401) and the developers behind it are frustratingly non-communicative about it, closing issues about it (https://github.com/ionide/ionide-vscode-fsharp/issues/1701). Usual rules about OSS maintainers apply, they don't technically owe us users anything ... but man it feels like we're being trolled by now :D

F# doesn't have a hard dependency on vscode. Resources from MS will obviously encourage using MS tooling, but ionide [1] is really good. The lsp+neovim workflow is not as good but getting better.

[1] https://ionide.io/

Important thread about this: https://github.com/ionide/ionide-vscode-fsharp/issues/1693

Perf Avore was developed on VSCode using the ionide plugin and dotnet cli.

I was on .Net 5 but same issue on 6. I tried the fix here- setting FSharp.dotnetRoot explicitly in settings.json and so far it seems better.

Make sure to keep an eye on this MR for that very capability :)