[ 'a[].d', 4 ],
], 'array of hashes';
+f { a => [ { a => 1, b => 2 }, { a => 3, c => 4 }, ] },
+[
+ [ 'a[+].a', 1 ],
+ [ 'a[].b', 2 ],
+ [ 'a[+].a', 3 ],
+ [ 'a[].c', 4 ],
+], 'array of hashes with not existing keys';
+
+
# tests from Hash::Flatten below
f {
'x' => 1,