// These are the only imps that specialize ContIterator (excl. StorageArea)
var strct := struct{ a := "A", b := "B", c := "C" };
var dict := dictionary{ "a" -> "A", "b" -> "B", "c" -> "C" };
var arr := array{ 1, 2, 3 };

print( { arr ..., arr ... } ); // { 1, 2, 3, 1, 2, 3 }
print( { arr ..., strct ... } ); // { 1, 2, 3, A, B, C }
print( { arr ..., dict ... } ); // { 1, 2, 3, A, B, C }

// A generic ContIterator imp does nothing
print( { arr ..., uninit ... } ); // { 1, 2, 3 };
print( { arr ..., ( "foo" ) ... } ); // { 1, 2, 3, "f", "o", "o" };