Support size one tuples

[ISibboI]

Tuples are required to be created with the comma operator as of now. It should be possible to create size one tuples using parentheses as well.

[nickisyourfan]

I'd love to look into this one as well -- In my project I am dynamically mapping values from a database to evaluate custom validations. Some of these might be vecs/arrays of length 1. It seems that tuples with length 1 convert to primitive types in this case?

[ISibboI]

Good point, that is true. So far, tuples are created by the comma operator, which is n-ary for n at least 2. Maybe a simple built-in function could help? Something like tuple or so.