I am considering allowing context definitions to express that no more than one
of a certain child is accepted. This is the currently implicitly the case for
Score as a child of Global.
I thought a syntax something like this would work:
\accepts “Zinnia” % any number of Zinnias is accepted
\accepts 1 “Peony” % at most one Peony is accepted
A user asking specifically for a \new Peony when one already exists gets a
warning.
If a Peony is required as an intermediate context when creating a new
descendant, and the Peony already exists, it is used silently. This grace
would not extend to limits > 1.
I would expect the initial implementation to reject any limit > 1. Allowing
larger numbers is an obvious direction for extension, but I don’t know whether
there is a use case for it.
I’m not sure yet that I want to go through with this just to eliminate a small
amount of special code for Global/Score, but I’m warming up to it. If there
are related concerns you would like me to consider, please voice them.
Regards,
—
Dan
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