Trivia before comma in tuple

[smoothdeveloper]

Issue created from fantomas-online

Code

let a = (1
#if TEST
, 2
#endif
)

Result

let a =
    (1,
#if TEST
     2
#endif
    )

Problem description

Notice how the comma which was in the compiler preconditional gets lifted out of it.

Maybe such case should be formatted:

let a =
    (1
#if TEST
     , 2
#endif
    )

Maybe a warning showing the location of the invalid construct, and formatting the remaining constructs would be good solution rather than failing to format the whole file?

Extra information

• [x] 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 2022-06-28T06:06:04Z - f175d437748ce81cf3b135d70e91d015e6d6be77

Default Fantomas configuration

[nojaf]

Hello, thank you for reporting this issue.

You are using conditional directives in a very exotic location there. Perhaps if the commas inside a tuple are used as trivia anchors you might be able to solve this.

Are you interested in submitting a PR for this?

[smoothdeveloper]

@nojaf, sorry I glitched the title due to adjusting my post the wrong way.

I may take a look at the issue eventually, the issue is not urgent for me, so you may leave it as up for grabs.