Conditional directives before expression leads to invalid code with Stroustrup

[sergey-tihon]

Issue created from fantomas-online

Code

    let inline skipNoFail count (source: seq<_>) =
#if FABLE_COMPILER
        seq {
          let mutable i = 0
          let e = source.GetEnumerator ()
          while e.MoveNext () do
            if i < count
            then
              i <- i + 1
            else
              yield e.Current
        }
#else
        Enumerable.Skip(source, count)
#endif

Result

let inline skipNoFail count (source: seq<_>) =
#if FABLE_COMPILER
seq {
    let mutable i = 0
    let e = source.GetEnumerator()

    while e.MoveNext() do
        if i < count then i <- i + 1 else yield e.Current
}
#else
    Enumerable.Skip(source, count)
#endif

Problem description

Incorrect indentation inside #if FABLE_COMPILER block.
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Extra information

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

Options

Fantomas master branch at 2022-09-17T05:39:07Z - c1a99d4

    { config with
                MultilineBlockBracketsOnSameColumn = true
                ExperimentalStroustrupStyle = true }

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

[nojaf]

This is the same problem as #2501.
When the SynExpr has trivia before it should probably not attempt stroustrup.
@josh-degraw wanna pair on this one sometime?

[josh-degraw]

This is the same problem as #2501.
When the SynExpr has trivia before it should probably not attempt stroustrup.
@josh-degraw wanna pair on this one sometime?

Yeah that would be great!