3a457e6ad6
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.)
24 lines
436 B
Text
24 lines
436 B
Text
def numChars (s : String) : Nat :=
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go s.iter
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where
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go (i : String.Iterator) : Nat :=
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if h : i.hasNext then
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go i.next + 1
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else
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0
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#guard numChars "aαc" == 3
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example : numChars "aαc" = 3 := by
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rfl'
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def numChars2 (s : String) : Nat :=
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go s.iter
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where
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go (i : String.Iterator) : Nat :=
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match h : i.hasNext with
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| true => go i.next + 1
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| false => 0
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example : numChars2 "aαc" = 3 := by
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rfl'
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