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.)
46 lines
1.1 KiB
Text
46 lines
1.1 KiB
Text
theorem ex1 (a : α) (b : List α) : (a::b = []) = False :=
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by simp
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theorem ex2 (a : α) (b : List α) : (a::b = []) = False :=
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by simp
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theorem ex3 (x : Nat) : (if Nat.succ x = 0 then 1 else 2) = 2 :=
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by simp
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theorem ex4 (x : Nat) : (if 10 = 0 then 1 else 2) = 2 :=
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by simp
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theorem ex5 : (10 = 20) = False :=
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by simp
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/--
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info: theorem ex5 : (10 = 20) = False :=
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of_eq_true (Eq.trans (congrArg (fun x => x = False) (eq_false_of_decide (Eq.refl false))) (eq_self False))
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-/
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#guard_msgs in
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#print ex5
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theorem ex6 : (if "hello" = "world" then 1 else 2) = 2 :=
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by simp (config := { decide := true })
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/--
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info: theorem ex6 : (if "hello" = "world" then 1 else 2) = 2 :=
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of_eq_true (eq_true_of_decide (Eq.refl true))
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-/
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#guard_msgs in
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#print ex6
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theorem ex7 : (if "hello" = "world" then 1 else 2) = 2 := by
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simp (config := { decide := false })
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-- Goal is now `⊢ "hello" = "world" → False`
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simp (config := { decide := true })
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theorem ex8 : (10 + 2000 = 20) = False :=
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by simp
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def fact : Nat → Nat
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| 0 => 1
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| x+1 => (x+1) * fact x
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theorem ex9 : (if fact 100 > 10 then true else false) = true :=
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by simp (config := { decide := true })
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