[Grace-core] The Raw and the Cooked - Was Re: Considering Traits as Objects in Grace

[Marco Servetto]

>> def foo = rule { xx }
>> def bar = rule { yy }
>> def baz = foo | bar     // if foo and bar are raw or placeholders, can't request "|" on foo.  oops.
>Why not? Surely that just cooks foo [...]

what about something like
def baz = options foo | bar | baz
where options is a function that takes foo and return an object that
can undestand | and so on?
with a more "flexible" syntax, ""::="" could be a better name for the
options function.