Comment unindented after DU cases

[cmeeren]

Issue created from fantomas-online

Code

type Frame =
    | A
    | B
    | C
    // TODO: Add D

Result

type Frame =
    | A
    | B
    | C
// TODO: Add D

Problem description

Seems similar to #1570, #2476, and #2482.

Options

Fantomas main branch at 2022-10-29T07:24:05Z - 767620c

Default Fantomas configuration

[dawedawe]

Hi Christer,
thanks for bringing this up. I think the same pointers apply here like in the issues you mention.

[github-actions]

🤖 This is an automated response from Repo Assist.

This is caused by the same root cause as #2653 — trailing comments after the last DU case / match clause fall outside the TypeDefnUnionNode.Range, so the trivia-attachment algorithm falls back to attaching them at module level (indent = 0).

A fix has been submitted (same PR as #2653). It uses a shallowest-first node search in Trivia.fs to find the enclosing TypeDefnUnionNode and attaches the comment at the correct indentation. All 2742 tests pass including a new regression test for this case.

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