Once tuples have a built-in syntax it becomes possible to add
pairs/byPair to associative arrays:
auto aa = [1:2, 3:4];
{int, int}[] myPairs1 = aa.pairs;
foreach ({k, v}; myPairs1) {}
auto myPairs2 = aa.byPair;
foreach ({k, v}; myPairs2) {}
Bye,
bearophile