Re: Tweak Slur direction "neutral", Re: Tweak Slur direction "neutral"

[Jean Abou Samra]

On 30/01/2023 08:19, Werner LEMBERG wrote:
> 
>>> When I attempt to change the "direction" property of a slur,
>>> whether that is with \tweak or \override, I cannot set the
>>> direction to neutral (0). UP (1) and DOWN (-1) work fine, but when
>>> setting to 0, I get the following error: 
>>>
>>> "Assertion failed: d, file 
>>> /home/lily/lilypond-2.24.0/release/binaries/mingw/lilypond/lilypond-2.24.0/flower/include/drul-array.hh,
>>>  line 56
>>> Exited with return code 3."  [...]
>>
>> You can see with
>>
>> \void \displayLilyMusic \slurNeutral
>>
>> that \slurNeutral is not equivalent to \override Slur.direction =
>> #0, but \revert Slur.direction, which reverts Slur.direction to its
>> default value #ly:slur::calc-direction.  [...]
> 
> But the user shouldn't see an assertion error even in case of a wrong
> argument, right?

Yeah,
https://gitlab.com/lilypond/lilypond/-/merge_requests/1828

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