Question about operators starting with `?`

[mlaily]

Hi,

I noticed that the latest FSharp Spec I could find (4.1) indicates in section 3.7 Symbolic Operators that

Only the operators ? and ?<- may start with ?.

The language docs about operators were updated in 2016 to mention this (dotnet/docs#1291), but there is also documentation about nullable operators that seems in direct contradiction with this statement.

The current compiler does allow custom operators starting with ? other than just ? or ?<-.

I didn't find a more up-to-date RFC in the fslang repo on this topic.

Did I miss something? What should I believe? Should the docs or/and the specs be changed?

[dsyme]

The docs and spec should be updated, thanks

[cartermp]

dotnet/docs#28497

[mlaily]

Thanks to you both for the clarification!