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%%%% This file is part of LilyPond, the GNU music typesetter.
%%%%
%%%% Copyright (C) 2011--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
%%%% Jan Nieuwenhuizen <janneke@gnu.org>
%%%%
%%%% LilyPond is free software: you can redistribute it and/or modify
%%%% it under the terms of the GNU General Public License as published by
%%%% the Free Software Foundation, either version 3 of the License, or
%%%% (at your option) any later version.
%%%%
%%%% LilyPond is distributed in the hope that it will be useful,
%%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%%%% GNU General Public License for more details.
%%%%
%%%% You should have received a copy of the GNU General Public License
%%%% along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
\version "2.17.6"
RemoveEmptyStaves = \with {
\override VerticalAxisGroup.remove-empty = ##t
\description "Remove staves which are considered to be empty according
to the list of interfaces set by @code{keepAliveInterfaces}."
}
RemoveAllEmptyStaves = \with {
\override VerticalAxisGroup.remove-empty = ##t
\override VerticalAxisGroup.remove-first = ##t
\description "Remove staves which are considered to be empty according
to the list of interfaces set by @code{keepAliveInterfaces}, including those
in the first system."
}
inherit-acceptability =
#(define-void-function (to from)
(symbol? symbol?)
(_i "When used in an output definition, will modify all context
definitions such that context @var{to} is accepted as a child by all
contexts that also accept @var{from}.")
(let* ((module (current-module))
(cmod (ly:make-context-mod)))
(ly:add-context-mod cmod (list 'accepts to))
(if (output-module? module)
(module-map
(lambda (_sym var)
(if (variable-bound? var)
(let ((cdef (variable-ref var)))
(if (ly:context-def? cdef)
(let ((accepts (ly:context-def-lookup cdef 'accepts)))
(if (and (memq from accepts)
(not (memq to accepts)))
(variable-set! var
(ly:context-def-modify cdef cmod))))))))
module)
(ly:parser-error (_ "Not in an output definition")))))
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