ref: da3ea788f4495c49c0cfad5ceaadecb469cda6c3
dir: /test/structasn.myr/
use std /* tests block assignment of structs. exits with 42.*/ type pair = struct a : int b : int ;; const main = { var x : pair var y : pair x.a = 12 x.b = 30 y = x -> y.a + y.b }