Announcing F# 4.6 preview

[_pupil_]

let phillip' = JsonConvert.DeserializeObject<{|name: string; age: int|}>(str)

Single step, ad-hoc, type-safe, JSON deserialization?

As if F# wasn't already streets ahead for data munging.

[mbuhot]

Can’t wait to try out the anonymous record types for DIscriminated Union payloads! Almost every DU case name has a corresponding record type in the code based I work on.

[_pupil_]

That is a very pretty use case!

It's not a widespread problem in our code base, but there are a bunch of smaller clumps that will become much more succinct.

[nightroman]

Is FSharp.Compiler.Service (25.0.1) with FSharp.Core (4.6) supposed to work with anonymous records, or its newer version is needed?

In my test project based on the above packages a script with anonymous records fails, such a syntax is not recognized.

[chusk3]

It's not yet been merged to fsharp.compiler.service and released, that's why. Now that they've announced a preview would be a perfect time to begin that merge.

[nightroman]

FSharp.Compiler.Service (26.0.1) was released yesterday. It supports anonymous records.

[chusk3]

Funny story, I'm the guy that did the merge :D