anselme/test/tests/for struct.ans

:s = { "a":"b", 6:"c", 98:5, true:3 }
:t = *s

/* struct iteration is non deterministic, too lazy to sort, so we check if we have 4 key that each appear at most once */
for(:k, s)
	|{t!has(k)}|
	t(k) = ()