Re: 2.21.1 change of behavior of \compressMMRests?

[Phil Holmes]

FYI the example you give:

timing = { \compressMMRests s1*28 \bar "|." }
PartA = { R1*4 R1*24 }
PartAComplete = << \timing \PartA >>
\score{ \new Staff \new Voice \PartAComplete }

Does not compress the rests in any 2.19 version.  There would seem to be a 
number of reasons.  The << >> brackets make parallel music, so the compress 
command does not refer to PartA.  The compress command requires that the 
music to be compressed is a single music expression, so if there is more 
than one rest, they must be enclosed in braces { }.

PartA = { \compressMMRests { R1*4 R1*24 } }
PartAComplete = { \PartA }
\score{ \new Staff \new Voice \PartAComplete }


Works in both 2.19 and 2.21 versions, although I know it's not what you want 
exactly.


--
Phil Holmes


----- Original Message ----- 
From: "Paul Scott" <address@hidden>
To: "Lilypond-User Mailing List" <address@hidden>
Sent: Saturday, May 02, 2020 9:02 PM
Subject: 2.21.1 change of behavior of \compressMMRests?


> The following MWE is a variation of the first code example in 2.21.1 
> Notation manual 1,2,2 Full Measure
> Rests:
>
> % Rest measures contracted to single measure
>
> \score{
>  \new Staff \new Voice
>  << { \compressMMRests } { R1*4 R1*24 R1*4 b'2^"Tutti" b'4 a'4} >>
> }
>
> mmxtest.ly:13:25: error: syntax error, unexpected '}', expecting \header
>
> I believe this used to work In 2.19.xx.
>
> How can I accomplish the following, i.e. have the structure common to all 
> parts in a single definition as I have been doing for many years with 
> Lily?
>
> For example:
>
> \version 2.20.0"
>
> timing = { \compressMMRests s1*28 \bar "|." }
>
> PartA = { R1*4 R1*24 }
>
> PartAComplete = << \timing \PartA >>
>
> \score{ \new Staff \new Voice \PartAComplete }