lean4-htt/tests/lean/run/diagnostics.lean
Leonardo de Moura 17c0187252
fix: add workaround for MessageData limitations (#6669)
This PR adds a workaround for the discrepancy between Terminal/Emacs and
VS Code when displaying info trees.
2025-01-16 16:58:20 +00:00

51 lines
1.5 KiB
Text

opaque q : Nat → Nat
def f (x : Nat) : Nat :=
match x with
| 0 => 1
| x+1 => q (f x)
theorem f_eq : f (x + 1) = q (f x) := rfl
set_option trace.Meta.debug true
/--
info: [diag] Diagnostics
[reduction] unfolded declarations (max: 15, num: 6):
[reduction] Nat.rec ↦ 15
[reduction] Add.add ↦ 10
[reduction] HAdd.hAdd ↦ 10
[reduction] Nat.add ↦ 10
[reduction] f ↦ 5
[reduction] OfNat.ofNat ↦ 5
[reduction] unfolded instances (max: 5, num: 1):
[reduction] instOfNatNat ↦ 5
[reduction] unfolded reducible declarations (max: 15, num: 1):
[reduction] Nat.casesOn ↦ 15
use `set_option diagnostics.threshold <num>` to control threshold for reporting counters
-/
#guard_msgs in
example : f (x + 5) = q (q (q (q (q (f x))))) :=
set_option diagnostics.threshold 4 in
set_option diagnostics true in
rfl
/--
info: [diag] Diagnostics
[reduction] unfolded declarations (max: 15, num: 6):
[reduction] Nat.rec ↦ 15
[reduction] Add.add ↦ 10
[reduction] HAdd.hAdd ↦ 10
[reduction] Nat.add ↦ 10
[reduction] f ↦ 5
[reduction] OfNat.ofNat ↦ 5
[reduction] unfolded instances (max: 5, num: 1):
[reduction] instOfNatNat ↦ 5
[reduction] unfolded reducible declarations (max: 15, num: 1):
[reduction] Nat.casesOn ↦ 15
use `set_option diagnostics.threshold <num>` to control threshold for reporting counters
-/
#guard_msgs in
example : f (x + 5) = q (q (q (q (q (f x))))) := by
set_option diagnostics.threshold 4 in
set_option diagnostics true in
rfl