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  DB<30> x @_
0  1
...
2  'D3'
3  'D4'
  DB<32>

  DB<32> @DEF= ("D1".."D4")

...
2  'D3'
3  'D4'
  DB<34>

use v5.12.0;
use warnings;
...
}

test(1..$_) for 0..3

("X", "Y", "Z")
(1, "Y", "Z")
(1, 2, "Z")
(1, 2, 3)