blob: cc8cf7857550823bc5f50647ab16317485f9d98e [file] [edit]
terminationFailure.lean:7:2-7:3: error: fail to show termination for
f.g
f
with errors
failed to infer structural recursion:
Cannot use parameters #1 of f.g and x of f:
failed to eliminate recursive application
_root_.f x
Could not find a decreasing measure.
The arguments relate at each recursive call as follows:
(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
Call from f.g to f at 9:9-12:
x1
x =
Call from f to f.g at 3:4-7:
x
x1 =
Please use `termination_by` to specify a decreasing measure.
f (x : Nat) : Nat
f.g : Nat → Nat
1
2
terminationFailure.lean:20:4-20:5: error: fail to show termination for
h
with errors
failed to infer structural recursion:
Cannot use parameter x:
failed to eliminate recursive application
h x
failed to prove termination, possible solutions:
- Use `have`-expressions to prove the remaining goals
- Use `termination_by` to specify a different well-founded relation
- Use `decreasing_by` to specify your own tactic for discharging this kind of goal
x : Nat
⊢ False
h (x : Nat) : Foo
Foo.a