streamStatus accidentals inconsistencies

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Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
python
领域
backend

调研方向

Start by running the four-line snippet from the report and checking the note's accidental display. The mismatch sits between PartExporter.fixupNotationMeasured() in music21/musicxml/m21ToXml.py, which checks haveAccidentalsBeenMade(), and makeAccidentals() in music21/stream/makeNotation.py, which sets the property directly; streamStatus.accidentals is also involved. Done means a note whose accidental has displayType 'never' is exported with no accidental, and existing accidental tests still pass.

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描述

music21 version

9.2.0b2

Problem summary
Accidentals are remade on streams that users may have already made accidentals for instead of short-circuiting. Discovered responding to #1667.

Steps to reproduce

n = note.Note()
n.pitch.accidental = pitch.Accidental('flat')
n.pitch.accidental.displayType = 'never'
n.show()

Expected vs. actual behavior
Expected: no accidental
Actual: accidental

More information
PartExporter.fixupNotationMeasured() checks haveAccidentalsBeenMade():
https://github.com/cuthbertLab/music21/blob/a938a8c8c74f21ceec5a99a1998d96c00d5f77e9/music21/musicxml/m21ToXml.py#L2866

But makeAccidentals sets the property instead:
https://github.com/cuthbertLab/music21/blob/a938a8c8c74f21ceec5a99a1998d96c00d5f77e9/music21/stream/makeNotation.py#L1739-L1740

But even PartExporter.fixupNotationMeasured() is probably too late, given that fromGeneralObject() runs first, runs makeNotation, and neither streamStatus.accidentals nor streamStatus.haveAccidentalsBeenMade() is checked.

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