&await.wrap: sub (+@proms) { my &orig = nextcallee; multi my-await(@proms) { @proms.map: &my-await } multi my-await(*@proms where *.elems > 1) { |my-await @proms } multi my-await(Awaitable $prom) { my-await orig $prom } multi my-await($value) { $value } my-await |@proms } say await [ start { 1, 2, start { 3, 4, start { 5 } } }, 42 ], 13, 3.14