ref: c7e6d109bcd7e0d0b33c5e134c83e3efe9154ef9 dir: /lib/std/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 }