Idempotency problem when Elmish Html

[dab-lmis]

Issue created from fantomas-online

Formatted code

Html.div
  [ Html.div[prop.children[renderEditor
                             35
                             150
                             (EditorValue.DatumOderStatus x.MontageStartStatus2)
                             update]

    prop.style
      [ bestimmeWarnungsfarbe (
          x.Abweichungen
          |> Option.map (fun x -> x.MontageStart)
        ) ]]
    Editors.RenderPlaceHolder classes.placeholder 35 150 ]

Reformatted code

Html.div
  [ Html.div[prop.children
               [ renderEditor 35 150 (EditorValue.DatumOderStatus x.MontageStartStatus2) update ]

               prop.style
               [ bestimmeWarnungsfarbe (
                   x.Abweichungen
                   |> Option.map (fun x -> x.MontageStart)
                 ) ]]
    Editors.RenderPlaceHolder classes.placeholder 35 150 ]

Problem description

Fantomas was not able to produce the same code after reformatting the result.

Extra information

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

Options

Fantomas 4.7.3

    { config with
                IndentSize = 2
                MaxLineLength = 100
                MaxRecordNumberOfItems = 2
                RecordMultilineFormatter = number_of_items
                MaxArrayOrListWidth = 20
                MaxArrayOrListNumberOfItems = 2
                MaxValueBindingWidth = 60
                MaxFunctionBindingWidth = 60
                DisableElmishSyntax = true }

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}

[nojaf]

Hello, thank you for reporting this issue.
This problem looks related to #2158.
The idempotency problem doesn't appear when there is a space before [.
Sample

Please note that Html.div[prop.children... is considered indexer syntax now.
So, fixing the issue above might not lead to what you are after.
Is there any reason you went with DisableElmishSyntax = true and not SingleArgumentWebMode = true

[dab-lmis]

Hi Florian, thank you for the answer. SingleArgumentWebMode = true<https://github.com/fsprojects/fantomas/blob/master/docs/Documentation.md#fsharp_single_argument_web_mode> is in deed what I want. I just didn’t know it exists. Thanks Daniel Von: Florian Verdonck ***@***.***> Gesendet: Donnerstag, 7. April 2022 15:01 An: fsprojects/fantomas ***@***.***> Cc: Daniel Berkenheide ***@***.***>; Author ***@***.***> Betreff: Re: [fsprojects/fantomas] Idempotency problem when Elmish Html (Issue #2195) Hello, thank you for reporting this issue. This problem looks related to #2158<#2158>. The idempotency problem doesn't appear when there is a space before [. Sample<https://fsprojects.github.io/fantomas-tools/#/fantomas/v4?data=N4KABGBEDGD2AmBTSAuKAJALgWwDYDp4BLANzAG0AdAJ0oDsIIs9DSKb7GwAHa2b-NAAWRXPGqIGVWgy6MJdJNQCixTLGpgAzAFYwARh0AGMAApVRddQBqAQ1wBXRPgAitzA%2BwB5JQGVM7g4AzmAAHvgAsrB0AQDmiP621JiJHkEATACUYA7c8O6IHLIQALpFXLz8%2BEGYAJ64iOwycowARog1RNjYiADqSXQOdLFBAGZJ7WbhAIKtAO6IRMJD8QwAPgB8YF7cmETR%2BNi23GajQ2FgALRb4VExtvGJyZmZ5Yxlze9vEBZWQfgAJUkSgACrhbNBEOhYGJEJpoOCgkEOvhuODIUIYUptHpDEYiiVIAAacBQZGYPbDIKoCikiCgFqQAAkdW4yDQkCIMWJdMYzJI9icNPIvK4RhJLQgkAAkopJCkiAAvZASyXpUVgEq8gC%2BqvpGuZrPZUC5mB5jKZAscxpFkoMerkkAitlCABkuYhXZJYpghObJfojEYNVquLreQzHSzamyaZBgV5Ru66Ak6g1-Vx%2BYKbRqIOkHZnlIpE8mVbmoLhRpAQzqHZHM9HYxzWrAYRm%2BZbs8Ly1oC3zZcjkgAxLn2AByiDmuA97a4mGoThrYbrBsbxsgLbbfaz1u7doALH2pb5ENgljDotNMEX4CWZ0ewONcMil4xw1x6x2jXHN7hZ1BO13NBbUlHQH0gXxuAhRAACFEFGDREBBJJbB6TA4X-CB50XFpQzfFcLW-ZtWz-bdAKFYDywANnAyDoLghCJFdWAFmoaBbGRWUSFgdi9miTCwGwxBXwgd9GE-KU1x-Ej-x3CjaTtAB2WioMhBjEIAVW4Nk2I4xAuJ49x9joASnxfXDawjVciKgX9ZPInM7QADhU%2Bj4MQgBhREgg86IagXaArFM%2BxzLkPDRIIqMbI3GSyKteSQJaABOVy1PciQIlPdpqGC59hIs5crMImN1zsuKu0ou1A1S2D0sQXzcH4h8zPysLLI-aySukrdV3ixyA30GrplGdDqF87pbAEoSRLAMT9WKptbNi3qKoUgN83LCDVNqxiElPc9GpM5qQtarhwtmyKG2isqVqAtaWn0XtNroyFhtGk8zzgQ6poXU73na8TOsWmKeotPq9wDQ9NtlJAYi8OgABVqFqXpLD9Y68pmuawAkgDruWsHVsSuRDCGvghngFxEGnM9Rp%2BnC2sKjqFvXU17PByqAxozbnVCaVRgRoRJGUPLfExZJUfgX0BP3YMCvwoqoq6jk2fKu7ia4fRlJ5l1ZVGIhQh2OF3A0ZRQl4DogmMgTjCxy6v2Vk1uTVhLy30FyddCIE4GoeBJelh9ZbtxWrsdzlndu12qpSz3vY0eAx08bLE2ldDsGpB91XliKQ4d4HsAcXA9mnFMhw0I4KThBGupd-qWnScVNrj32IkL4uPTL6gK7p8DBmwbKAH1YFGAfLFPalg%2BZpXgdVyO67kdJBs96ZqGoWxai8ah3Rqf30fLBvJ8Blm41nwn1f3ja7SdF0V7Xjet6IGpE-7uEU7TjP98P%2Bbp-XAui9EDu5d3CjWrrGWuEN65PSvrfdem9t6YFbv-EuiBO7dwwuBYQKFApwgHnMIgUs-RfxxkDVmEcz5RzVFDK%2BvM7DWhglyYgwxd4CSonLRmCsp6hxnmQqMHN7oLzAp7IcQxArGXoYoLksRmEPlYUQ3Ghow6n14UTfe3NqEuhcLATAABxRA15zYSCRMZaR5ZbbZwurnSS%2BNQbKPPnadI2tqFtwASmGCjVoAAGsYJr08XooI8NfCoXqjCTwR1ywtTkSQ7qpE54QIXh7K%2BE4pwejgpgBYkhQGICpvrOglhjLTEUJlF%2B1AP52gieY7G8ipLERsQ2PhGtGDpBjlfAA0ogRA3B%2BaC0kLKQJPRSy5VCmdAG38uGkLNOAzmLQtCN3UaEEWZ4ghCBMQeNhwymZHx-tE9mKi7RaCXlfXwkiGgr1iJ4eUvRECtCiEgQZf1SgjOIcfGpMTyHzy4FoS%2BkpIDTGnLEOgwi6CiOiEc-5gQJAI1gDD> Please note that Html.div[prop.children... is considered indexer syntax now. So, fixing the issue above might not lead to what you are after. Is there any reason you went with DisableElmishSyntax = true and not SingleArgumentWebMode = true<https://github.com/fsprojects/fantomas/blob/master/docs/Documentation.md#fsharp_single_argument_web_mode> — Reply to this email directly, view it on GitHub<#2195 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AWDM4GC3UOLK2WDHUO7VQILVD3L7NANCNFSM5SZIE2DQ>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[nojaf]

Hi Daniel,

Happy to help. If you have any more questions you can always find some help on our Discord server.
I'll leave this issue open as it is indeed a problem.

[nojaf]

Fixed by #2446