There are many thing they could have done. Maybe handle both cases the same, using 'in-order' matching for the first unnamed case. Or since they like regenerating source, spitting out :

    Valid source:
    t := T{"example", 123, ""}
    or
    t := T{"", 123, "example"}

Using some kind of unification of set(String, Int, String) with set("example"::String, 123::Int)