Code reformat breaks the code

When running code Reformat Code (cmd+opt+L), the produced code is broken because of indentation when using [<Annotations>]:

[<CLIMutable>]
type CreateUser =
    { [<JsonRequired>]
      Name: string }

is changed to:

[<CLIMutable>]
type CreateUser =
    {  [<JsonRequired>]
      Name: string }

^ Notice the extra space in front of [<JsonRequired>]. That make the code on the next line “off side”, which causes the whole parsing to fail.

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Also, one unrelated question: I read on fantomas’ site that Rider uses it for its formatting. However, fantomas’ formatting is way more opinionated than Rider’s. Imo that’s mostly a good thing, but it would be nice if it was configurable so that I could choose fantomas’ more opinionated formatting if I wanted to.

[auduchinok]

@nojaf : Trying the code above in the online tool you linked gives correct code. When I do the same in Rider, it gives the wrong code.

This could be due to Rider uses different default settings compared to the online tool. We have PreserveEndOfLine enabled by default to try to preserve used formatting style where possible.

Is there an ETA on that? Also, can you add formatting options to the (fantomas) code formatting in Rider? Fantomas has a ton of options

All Fantomas options are already in File | Settings | Editor | Code Style | F#.

[auduchinok]

Fixed in 2019.3 with Fantomas update.