Files
lean4/tests/elab_fail/funind_errors.lean
Garmelon 08eb78a5b2 chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

46 lines
1.2 KiB
Lean4
Raw Permalink Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
-- Some of these tests made more sense when we had a
-- derive_functional_induction command.
#check doesNotExist.induct
def takeWhile (p : α Bool) (as : Array α) : Array α :=
foo 0 #[]
where
foo (i : Nat) (r : Array α) : Array α :=
if h : i < as.size then
let a := as[i]
if p a then
foo (i+1) (r.push a)
else
r
else
r
termination_by as.size - i
-- Checks the error message when the users tries to access the induct rule for the wrong function
-- (before we used reserved names for this feature we did give a more helpful error message here)
#check takeWhile.induct
#check takeWhile.foo.induct
-- this tests the error we get when trying to access the induct rules for
-- a function that recurses over an inductive *predicate* (not yet supported)
inductive Even : Nat Prop where
| zero : Even 0
| plus2 : Even n Even (n + 2)
def idEven : Even n Even n
| .zero => .zero
| .plus2 p => .plus2 (idEven p)
#check idEven.induct
-- this tests the error we get when trying to access the induct rules for
-- a function that recurses over `Acc`
def idAcc : Acc p x Acc p x
| Acc.intro x f => Acc.intro x (fun y h => idAcc (f y h))
#check idAcc.induct