Indentation of pattern match clause

[nojaf]

Issue created from fantomas-online

Code

match x with
| Some y ->
    // meh
    y
| None -> 42

Result

match x with
| Some y ->
    // meh
    y
| None -> 42

Problem description

Both style guides say the following for multiline body expressions:

If the expression on the right of the pattern matching arrow is too large, move it to the following line, indented one step from the match/|.

See https://docs.microsoft.com/en-us/dotnet/fsharp/style-guide/formatting#pattern-matching-constructs
And https://github.com/G-Research/fsharp-formatting-conventions#pattern-matching-constructs

Fantomas does this correct if the indentation is 3 or 4 but not if it is 2.

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 03/03/2021 07:40:00 - e92fa7a

    { config with
                IndentSize = 2 }

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