Issue 1740 in lilypond: \set should store "original" settings so \once \set would restore them

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 1740 by brownian.box: \set should store "original" settings so  
\once \set would restore them
http://code.google.com/p/lilypond/issues/detail?id=1740

Reported by Eluze,
http://lists.gnu.org/archive/html/bug-lilypond/2011-07/msg00050.html

After changing defaults with \set, there is no way to return to this  
changed state after jumping aside with \once \set:

%----------------8<----------------------
\relative {
  \set fingeringOrientations = #'(left)
  < e -1>1 |
  \once \set fingeringOrientations = #'(right)
  < e -1> |
  < e -1> -"should be ’left !" |
}
%------------------8<----------------------

ps. I am not sure whether it is a bug or docs issue (and smth would be  
added to notation/the-set-command) -- see that thread mentioned above.

Attachments:
        test.png  1.4 KB