lean4-htt/tests/elab/891.lean
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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@[reducible]
def isLeapYear (y : Nat) : Prop := (y % 400 = 0) (y % 4 = 0 ∧ y % 100 ≠ 0)
def daysInMonth (year : Nat) (month : Nat) : Nat :=
match month with
| 2 => if isLeapYear year then 29 else 28
| 4 => 30
| 6 => 30
| 9 => 30
| 11 => 30
| _ => 31
/-
Stuck at:
year : Nat
⊢ (match 4 with
| 2 => if isLeapYear year then 29 else 28
| 4 => 30
| 6 => 30
| 9 => 30
| 11 => 30
| x => 31) =
30
-/
example (year : Nat) : daysInMonth year 4 = 30 := by
simp [daysInMonth]
example (year : Nat) : daysInMonth year 12 = 31 := by
delta daysInMonth
simp
example (year : Nat) : daysInMonth year 2 = (if isLeapYear year then 29 else 28) := by
simp [daysInMonth]
def f : Char → Nat → Nat
| 'a', _ => 1
| 'b', _ => 2
| _, _ => 3
example : f 'a' n = 1 := by
simp[f]
example : f 'b' n = 2 := by
simp[f]
example : f 'c' n = 3 := by
simp (config := { decide := true }) [f]
def g : String → Nat → Nat
| "hello", _ => 1
| "world", _ => 2
| _, _ => 3
example : g "hello" n = 1 := by
simp[g]
example : g "world" n = 2 := by
simp[g]
example : g "abc" n = 3 := by
simp (config := { decide := true }) [g]
def fn : Fin 8 → Nat → Nat
| 2, _ => 1
| 3, _ => 2
| _, _ => 3
example : fn 2 n = 1 := by
simp [fn]
example : fn 4 n = 3 := by
simp [fn]
def f8 : UInt8 → Nat → Nat
| 10, _ => 1
| 20, _ => 2
| _, _ => 3
example : f8 10 n = 1 := by
simp [f8]
example : f8 30 n = 3 := by
simp [f8]
def f16 : UInt16 → Nat → Nat
| 10, _ => 1
| 20, _ => 2
| _, _ => 3
example : f16 10 n = 1 := by
simp [f16]
example : f16 30 n = 3 := by
simp [f16]
def f32 : UInt32 → Nat → Nat
| 10, _ => 1
| 20, _ => 2
| _, _ => 3
example : f32 10 n = 1 := by
simp [f32]
example : f32 30 n = 3 := by
simp [f32]
def f64 : UInt64 → Nat → Nat
| 10, _ => 1
| 20, _ => 2
| _, _ => 3
example : f64 10 n = 1 := by
simp [f64]
example : f64 30 n = 3 := by
simp [f64]