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lean4/tests/elab/check.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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import Lean
/-- info: And.intro {a b : Prop} (left : a) (right : b) : a ∧ b -/
#guard_msgs in
#check And.intro
/--
info: @Or.rec : ∀ {a b : Prop} {motive : a b → Prop},
(∀ (h : a), motive ⋯) → (∀ (h : b), motive ⋯) → ∀ (t : a b), motive t
-/
#guard_msgs in
#check @Or.rec
/-- info: Eq.{u_1} {α : Sort u_1} : αα → Prop -/
#guard_msgs in
#check Eq
/--
info: @Eq.rec : {α : Sort u_2} →
{a : α} → {motive : (a_1 : α) → a = a_1 → Sort u_1} → motive a ⋯ → {a_1 : α} → (t : a = a_1) → motive a_1 t
-/
#guard_msgs in
#check @Eq.rec
/-!
The `#check` command also typechecks the result to help users debug buggy elaborators.
-/
section
open Lean
def expr_1eq1 : Expr := mkApp3 (.const ``Eq [0]) (.const ``Nat []) (mkNatLit 1) (mkNatLit 1)
elab "elab_1eq1" : term => return expr_1eq1
/--
error: Application type mismatch: The argument
Nat
has type
Type
of sort `Type 1` but is expected to have type
Prop
of sort `Type` in the application
@Eq Nat
-/
#guard_msgs in #check elab_1eq1
/--
error: Application type mismatch: The argument
Nat
has type
Type
of sort `Type 1` but is expected to have type
Prop
of sort `Type` in the application
@Eq Nat
-/
#guard_msgs in #reduce elab_1eq1
end