On a somewhat regular basis, I end up needing to extract a single field 
from a tuple provided from a third-party function. At the moment, I have to 
write a boilerplate function just to pattern match it out. If I need the 
second field of tuple of a different size, I need to write more boilerplate.

Seeing as record filed names cannot start with digits, and the language 
only allows up to Tuple9, it would be nice to have `.0` through `.8` as 
accessors to the tuple. This is symmetric with record field access 
"methods", and seems like a moderate ergonomic gain.

Thoughts?

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