decl test-variables : \int -> \unit
def test-variables : a = {
  var x = if a < 123 then "aaa" else "bbb"

  var y = 543.32 in do-something:

  var z = 543.32 in {
    for x in 1--10 do print: 111
    if scan:[int] < 11 then do-something-another: z "aaa"
  }
}