Example from Microsoft F# documentation doesn't compile

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MS documentation: Use interfaces to group related operations 

type Serializer =
    abstract Serialize<'T>: preserveRefEq: bool -> value: 'T -> string
    abstract Deserialize<'T>: preserveRefEq: bool -> pickle: string -> 'T

If I copy and paste that into an fsx script or a dotnet-interactive notebook, I'll get a compiler error that says:

This construct is deprecated: ':' is not permitted as a character in operator names and is reserved for future useF# Compiler(35)

What changes would I need to make in order to fix this example?

f#
1 Answers

I think just adding a space before the colon fixes it:

type Serializer =
    abstract Serialize<'T> : preserveRefEq: bool -> value: 'T -> string
    abstract Deserialize<'T> : preserveRefEq: bool -> pickle: string -> 'T

This might be a compiler bug.

user_56524830
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