Nested if/else/then in short mode

[nojaf]

Issue created from fantomas-online

Code

            let funcs =
                fse.MembersFunctionsAndValues
                |> Seq.sortWith (fun n1 n2 ->
                    let modifierScore (f : FSharpMemberOrFunctionOrValue) =
                        if f.IsProperty then
                            if f.IsInstanceMember then
                                if f.IsDispatchSlot then 9 else 1
                            else 8
                        elif f.IsMember then
                            if f.IsInstanceMember then
                                if f.IsDispatchSlot then 11 else 2
                            else 10
                        else 3
                    let n1Score = modifierScore n1
                    let n2Score = modifierScore n2
                    if n1Score = n2Score then
                        n1.DisplayName.CompareTo n2.DisplayName
                    else
                        n1Score.CompareTo n2Score
                )

Error

Fantomas was able to format the code but the result appears to be invalid F# code.
Please open an issue.

Formatted result:

let funcs =
    fse.MembersFunctionsAndValues
    |> Seq.sortWith
        (fun n1 n2 ->
            let modifierScore (f: FSharpMemberOrFunctionOrValue) =
                if f.IsProperty
                then if f.IsInstanceMember then if f.IsDispatchSlot then 9 else 1 else 8
                elif f.IsMember
                then if f.IsInstanceMember then if f.IsDispatchSlot then 11 else 2 else 10
                else 3

            let n1Score = modifierScore n1
            let n2Score = modifierScore n2
            if n1Score = n2Score then n1.DisplayName.CompareTo n2.DisplayName else n1Score.CompareTo n2Score)

Problem description

                if f.IsProperty
                then if f.IsInstanceMember then if f.IsDispatchSlot then 9 else 1 else 8

I think the short if/then syntax invalid if the if branch contains a short if/then/else.
Something along those lines.

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Extra information

• The formatted result breaks by code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas Master at 11/07/2020 09:02:01 - de55bd9

Default Fantomas configuration