Removes the first comment above the member of the list

[Thecentury]

Issue created from fantomas-online

Code

let x = [
    // comment
    1
    // another comment
    2
]

Result

let x =
    [ 1
      // another comment
      2 ]

Problem description

Fantomas removes the first comment.

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 07/20/2020 08:56:02 - d42a156

Name	Value
IndentSize	4
MaxLineLength	120
SemicolonAtEndOfLine	false
SpaceBeforeParameter	true
SpaceBeforeLowercaseInvocation	true
SpaceBeforeUppercaseInvocation	false
SpaceBeforeClassConstructor	false
SpaceBeforeMember	false
SpaceBeforeColon	false
SpaceAfterComma	true
SpaceBeforeSemicolon	false
SpaceAfterSemicolon	true
IndentOnTryWith	false
SpaceAroundDelimiter	true
MaxIfThenElseShortWidth	40
MaxInfixOperatorExpression	50
MaxRecordWidth	40
MaxArrayOrListWidth	40
MaxValueBindingWidth	40
MaxFunctionBindingWidth	40
MultilineBlockBracketsOnSameColumn	false
NewlineBetweenTypeDefinitionAndMembers	false
KeepIfThenInSameLine	false
MaxElmishWidth	40
SingleArgumentWebMode	false
AlignFunctionSignatureToIndentation	false
AlternativeLongMemberDefinitions	false
StrictMode	false

[knocte]

Removing comments is pretty bad because there's no way to detect this bug (it's failing silently), so using fantomas makes you lose important information. I'd mark this as high priority if you ask me.

[nojaf]

The missing comment is now assigned to SynExpr.CompExpr.

Trivia for that node is most likely not being printed somewhere in CodePrinter, so a fix done there.
Alternatively, you could try and assign the comment to SynExpr.Const as that is being printed as you can see for the other comment.

See video to have a better understanding about what I'm talking about.