lean4-htt/tests/lean/dbgMacros.lean
2020-09-10 14:25:07 -07:00

34 lines
397 B
Text

new_frontend
def f (x : Nat) :=
if x = 0 then panic! "unexpected zero"
else x - 1
#eval f 0
#eval f 10
def g (x : Nat) :=
if x = 0 then unreachable!
else x - 1
#eval g 0
def h (x : Nat) :=
assert! x != 0;
x - 1
#eval h 1
#eval h 0
def f2 (x : Nat) :=
dbgTrace! "f2, x: " ++ toString x;
x + 1
#eval f2 10
def g2 (x : Nat) : IO Nat := do
IO.println "g2 started";
return x + 1
#eval g2 10