function type's literal

3.30: mis.adda/dstr/function type's literal as @:
. just as #.t is the array type's literal,
the function should have something besides ()
because then how do you say function's type
symbolically rather than literally ?
isn't it tacky having manditory useless paren's?
. the @ is english's symbol for function application,
so then @.t could be function type's literal .
then to define the arg type symbolically,
say rec.type: (v.t, ...),
you have @rec.t or #rec.t .
. but then you'd expect
f@x
whereas the english expectation from email syntax is
x@f .