[Lilypond-auto] Issue 3225 in lilypond: Patch: Decouple \defaultchild from \accepts list in contexts

[lilypond]

Status: Started
Owner: address@hidden
Labels: Type-Enhancement Patch-new

New issue 3225 by address@hidden: Patch: Decouple \defaultchild from \accepts  
list in contexts
http://code.google.com/p/lilypond/issues/detail?id=3225

Decouple \defaultchild from \accepts list in contexts

The definition of a Bottom context previously was a context not
accepting any subcontexts.  Now it is a context without a
\defaultchild.  The defaultchild of a context previously was the first
found in the \accepts list (if necessary, moving it there).  While
\defaultchild was tracked in context definitions, it was not explicit
in instantiated contexts.

Decoupling those makes for more flexible arrangements of contexts.
For example, one might let Voice accept a SubVoice context without
forcing SubVoice to be created when a Bottom context is called for
when in Voice, simply by not giving Voice a \defaultchild.

http://codereview.appspot.com/7476043

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