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Misaligned comment in MultiLineBlockBracket #1716
Description
Issue created from fantomas-online
Code
module I =
let f =
[
""
// hi
]Result
module I =
let f =
[
""
// hi
]
Problem description
This is incredibly minor but I think the unindentation of the comment is aesthetically a bit sad. It would be more consistent for that comment to be indented one scope.
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 05/09/2021 13:45:10 - f10b822
{ config with
SpaceBeforeUppercaseInvocation = true
SpaceBeforeClassConstructor = true
SpaceBeforeMember = true
SpaceBeforeColon = true
SpaceBeforeSemicolon = true
MultilineBlockBracketsOnSameColumn = true
AlignFunctionSignatureToIndentation = true
AlternativeLongMemberDefinitions = true
MultiLineLambdaClosingNewline = true
KeepIndentInBranch = true }Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?
Activity
github-actions commentedon Mar 30, 2026
🤖 This is an automated response from Repo Assist.
Thanks for filing this,
@Smaug123. TheMultilineBlockBracketsOnSameColumnoption has since been renamed/replaced byMultilineBracketStyle = Aligned, but the trivia indentation issue you describe — a line comment inside a list item appearing at the bracket level rather than the item level — is a known category of trivia handling bug in Fantomas.The root cause is that when the comment trivia is attached to the list item node in the Oak representation, the indentation context applied to the comment comes from the bracket scope rather than the item scope. This is a non-trivial fix in the trivia attribution logic in
ASTTransformer.fs.The issue is still open and still relevant. If anyone wants to look at it, the place to start is how
mkExprListOrArrayinASTTransformer.fsattributes trivia to list elements — specifically trailing comments on items before the closing bracket.Fix trailing blank line when file ends with comment, add regression …
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