Tuple projections

[radrow]

Tuple projections are awkward, even considering standard library which offers fst, snd etc. for pairs and triples. There should be a convenient generic way of accessing them:

let t = (1, "xd", true, [4,5,6,7])

t[1] + List.length(t[4])

It's to be discussed if we prefer indexing from 0 or 1. For reference, Erlang and Scala do it from 1, while Python and JS prefer 0. Note that computationally it does not matter, because the index has to be a fixed (syntactically) integer due to type consequences.