lean4-htt/tests/lean/run/1030.lean
Kim Morrison 3a457e6ad6
chore: use #guard_msgs in run tests (#4175)
Many of our tests in `tests/lean/run/` produce output from `#eval` (or
`#check`) statements, that is then ignored.

This PR tries to capture all the useful output using `#guard_msgs`. I've
only done a cursory check that the output is still sane --- there is a
chance that some "unchecked" tests have already accumulated regressions
and this just cements them!

In the other direction, I did identify two rotten tests:
* a minor one in `setStructInstNotation.lean`, where a comment says `Set
Nat`, but `#check` actually prints `?_`. Weird?
* `CompilerProbe.lean` is generating empty output, apparently indicating
that something is broken, but I don't know the signficance of this file.

In any case, I'll ask about these elsewhere.

(This started by noticing that a recent `grind` test file had an
untested `trace_state`, and then got carried away.)
2024-05-16 00:38:31 +00:00

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def foo: List Unit → Type
| [] => Unit → Unit
| _ :: tl => foo tl
partial def bar: (l: List Unit) → foo l → foo l
| [] , f => λ t => f t
| _ :: tl, f => bar tl f
def bar': (l: List Unit) → foo l → foo l
| [] , f => by simp only [foo] at f; exact (λ t => f t)
| _ :: tl, f => bar' tl f
/-- info: () -/
#guard_msgs in
#eval bar [()] id ()