Currying

[Victorious3]

Once we have lambda functions, currying can be achieved using those.
It might be convenient to create an extra operator to generate curried functions.

def some_function(a: int, b: int)
let curried = some_function(-, 20)
// essentially the same as
let curried2 = (a: int) -> some_function(a, 20)
curried(10)

Only positional arguments are allowed in this case.