ref: 38585ffa91d7b6e7b9e4f688e3f9fa84a48f1925 dir: /libstd/swap.myr/
pkg std = generic swap : (a : @a#, b : @a# -> void) ;; generic swap = {a : @a#, b : @a# var t t = a# a# = b# b# = t }