C# is Getting Discriminated Unions!

[collynchristopherbrenner]

Really cool to have native Result and Option support, though it doesn't take too much to create these manually anyhow. It will be nice to see these become mainstream for error handling.

[有]

Wow, this is a big step forward for C#! Can't wait to see more updates.

[thefattysplace]

I have no idea what this is and can't think of why i would need it. Someone enlighten me please!

[gabrielilie]

Someone at Microsoft just saw how languages like Go & Rust are doing things. This will greatly help with error handling.

[parlor]

Man, I never thought we'd actually see this 🥲

[GdeVseSvobodnyeNiki]

that's neat. F# is slowly dripping into C#

[SG_]

Very cool! Can't wait for the full description ^_^

[DryBones]

This is big news. Hopefully there's no caveats to the type safety with these (like nulls).

[EdKolis]

Wow, cool. When are these coming? C# 13 or later? Now why aren't ad hoc unions called anonymous unions since we already have anonymous everything else? Oh right, they do have names, just several of them! 😂 Is there a variant of the ad hoc union that uses and instead of or so we don't have to define marker combo interfaces and pray that implementers use them?

[antonmartyniuk]

Microsoft needs to make switch expressions to be able to return void for Union Types

[rhogal]

Could you make a video on unmanaged function pointers (delegate* unmanaged)? Since there seems to be no actual documentation of this feature.

[Robert-ywms]

Predictions on when this gets cancelled?

[nemanjaberic]

Is this another Union in C# dream? How do I know I am not in a dream again?

[Kitulous]

kinda sucks that the syntax is T1 or T2 and not T1|T2 but ok

[MatinDevs]

YESSSS OMG LETS FUN OHOHHOHOHOHOHH I LOVE ONIONS

[DarkIllusoire]

With union, Delphi runs to complete transfer to c#))

[ryan-heath]

Is this a compiler only feature or do the need to change the CLR too?

[Nekroido]

And of course they won't naturally interop with F# implementation 🫠

[Kitulous]

WHAT A TIME TO BE ALIVE YAY LET'S

[davidneale]

A giant leap forward towards turning C# into F#. If they actually manage to get it done and shipped of course. I hope so. Next stop, immutable by default and expressions instead of statements 😊