lean4-htt/old_tests/tests/lean/run/basic_monitor1.lean
2018-04-10 12:56:55 -07:00

11 lines
242 B
Text

@[vm_monitor]
meta def basic_monitor : vm_monitor nat :=
{ init := 0, step := λ s, return (trace ("step " ++ to_string s) (s+1)) >> failure }
set_option debugger true
def f : nat → nat
| 0 := 0
| (a+1) := f a
#eval trace "a" (f 4)