lean4-htt/tests/elab/choiceExpectedTypeBug.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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Text

import Lean
structure A :=
(x : Nat := 10)
def f : A :=
{ }
theorem ex : f = { x := 10 } :=
rfl
#check f
syntax (name := emptyS) "⟨" "⟩" : term -- overload `⟨ ⟩` notation
open Lean
open Lean.Elab
open Lean.Elab.Term
@[term_elab emptyS] def elabEmptyS : TermElab :=
fun stx expectedType? => do
tryPostponeIfNoneOrMVar expectedType?
let stxNew ← `(Nat.zero)
withMacroExpansion stx stxNew $
elabTerm stxNew expectedType?
def foo (x : Unit) := x
def f1 : Unit :=
let x := ⟨ ⟩
foo x
def f2 : Unit :=
let x := ⟨ ⟩
x
def f3 : Nat :=
let x := ⟨ ⟩
x
theorem ex2 : f3 = 0 :=
rfl