F＃中的let绑定中的模式匹配

Question

I wanna do:

let Some(x) = bar in ...

but I can't do this unless I do

let Some(x) as idontcare = bar in ...

is there a better way to say "I don't care about the whole pattern, just match the inside"

(I would use _ but that doesn't parse so I am using __ instead)

Yes I know this is partial, I just am doing a quick script.

Edit: Also this is just an example with a builtin sum type, so Option.get is not generic; plus I want this to be inline like the Haskell let-bindings.

Answer 1

let Some(x) = bar

defines a new function Some , shadowing the existing constructor. Instead, you want:

let (Some(x)) = bar

Answer 2

You could use a match :

match bar with | Some(x) -> ...

if you're trying to match an option specifically you could use Option.get :

bar |> Option.get |> ...