"Pronouns" for swallowing unneeded arguments

[hadley]

Maybe something like this:

{x : ... : y } %<-% list(1, 2, 3, 4, 5)
{x : . : y : . : z} %<-% list(1, 2, 3, 4, 5)

[nteetor]

The latter syntax is supported.

{x : . : y : . : z} %<-% list(1, 2, 3, 4, 5)

In this case, x, y, and z are assigned 1, 3, and 5, respectively.

Regarding the former syntax, we currently recommend using .... to swallow unneeded arguments. In this case, . is assigned the grouped arguments, however this could be changed. What is the case against assigning grouped values and then ignoring the assigned variable?