Re: Accidentals not reprinted when using \partial

[Keith OHara]

Xavier Scheuer <x.scheuer <at> gmail.com> writes:
> > On 8 January 2011 13:33, Daniel Meyer <kontakt <at> djmeyer.de> wrote:
> >> % If you write a note with an accidental
> >> % and use the same note in the next measure,
> >> % the accidental should be reprinted.
> >> % When using \partial, it is not reprinted.
> 
> \partial  goes back in time and thus make LilyPond think your  es4  is
> in the same measure as  es1 .
> Since an accidental is not reprinted in the same measure, LilyPond does
> not reprint your accidental.
> 
Repeating what Xavier said because it is so true.

This is the second report within a month of this issue. There are situations, 
especially around repeats, where common practice music uses partial-length bars 
and accidentals are reset at the barlines.  

The 2.12 manual wrongly suggested \partial for these situations, so Mark fixed 
the 2.13 manual (http://code.google.com/p/lilypond/issues/detail?id=1090). 
Issue 355 mentions the problem with accidentals in the discussion, but the main 
point was something else so 355 it might resolve without helping people in the 
Daniel's (original poster) situation.
2.13.30+ gives a warning, but current manual leads one to the code below, which 
bypasses the warning but fails to print the barline

So it looks to me like we need a new issue.

%% The final f-sharp should have a sharp sign 
%%  if it follows a printed barline

\version "2.13.46"
\relative c' 
{ \partial 8*1 fis8 | fis1 | 
  \set Timing.measurePosition = #(ly:make-moment -7 8)
  fis2. gis8 }

% Workaround: use a *positive* measurePosition to move time forward
%   \set Timing.measurePosition = #(ly:make-moment 1 8)
% as described in versions after 2.13.30 of Notation Reference 1.4.1

% Suggested choices for resolution:
%  Rename \partial to indicate its baking-up nature, \anacrusis or \pickup
%  Define a new function \shorten with syntax of \partial but moving forward
%  Document a correctly shortened bar, and point 
%   to that example near the teaching of \partial