Status of question mark syntax for missing values

Internals & Design
5

How about defining ? to be an ordinary function (when it’s not used as if)? It would let you use different ? locally (like you can do it with, e.g., *):

let ? = passmissing
    match?.(r"a", x)
end

It may also be nice to be able define arbitrary lifting functions (say) using unicode combining characters:

const ?̃ = mylift

f?̃(x)
2 Likes