lean4-htt/tests/elab/doLetElse.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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def foo (x? : Option Nat) : IO Nat := do
let some x := x? | return 0
IO.println s!"x: {x}"
return x
def testFoo (input : Option Nat) (expected : Nat) : IO Unit := do
assert! (← foo input) == expected
/-- info: x: 10 -/
#guard_msgs in
#eval testFoo (some 10) 10
#guard_msgs in
#eval testFoo none 0
/-- info: x: 1 -/
#guard_msgs in
#eval testFoo (some 1) 1
def bar (x : Nat) : IO (Fin (x + 1)) := do
let 2 := x | return 0
-- the pattern match performed a substitution
let y : Fin 3 := ⟨1, by decide⟩
return y
def testBar (x : Nat) (expected : Fin (x + 1)) : IO Unit := do
assert! (← bar x) == expected
#guard_msgs in
#eval testBar 1 0
#guard_msgs in
#eval testBar 2 1
#guard_msgs in
#eval testBar 3 0