lean4-htt/tests/elab_fail/getElem.lean.out.expected
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

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getElem.lean:2:2-2:6: error: failed to prove index is valid, possible solutions:
- Use `have`-expressions to prove the index is valid
- Use `a[i]!` notation instead, runtime check is performed, and 'Panic' error message is produced if index is not valid
- Use `a[i]?` notation instead, result is an `Option` type
- Use `a[i]'h` notation instead, where `h` is a proof that index is valid
a : Array Nat
i : Nat
⊢ i < a.size
def f2 : (a : Array Nat) → Fin a.size → Nat :=
fun a i => a[i]
def f3 : {n : Nat} → (a : Array Nat) → n ≤ a.size → Fin n → Nat :=
fun {n} a h i => a[i]
def f5 : (i : Nat) → i < n → Nat :=
fun i h => a[i]
def f6 : Nat → Nat :=
fun i => a[i]!
def f7 : Nat → Option Nat :=
fun i => a[i]?