7 lines
183 B
Text
7 lines
183 B
Text
import system.io
|
|
|
|
definition iowhen (b : bool) (a : io unit) : io unit :=
|
|
if b = tt then a else return ()
|
|
|
|
vm_eval iowhen tt (put_str "hello\n")
|
|
vm_eval iowhen ff (put_str "error\n")
|