lean4-htt/tests/elab/lossy_casts.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

61 lines
824 B
Text

import Std
/-!
Ensure that we have not created lossy cast instances.
-/
/--
error: Type mismatch
x
has type
Nat
but is expected to have type
Fin 8
-/
#guard_msgs in
example (x : Nat) : Fin 8 := x
/--
error: Type mismatch
x
has type
Nat
but is expected to have type
UInt8
-/
#guard_msgs in
example (x : Nat) : UInt8 := x
/--
error: Type mismatch
x
has type
Nat
but is expected to have type
USize
-/
#guard_msgs in
example (x : Nat) : USize := x
/--
error: Type mismatch
x
has type
Nat
but is expected to have type
Int8
-/
#guard_msgs in
example (x : Nat) : Int8 := x
/--
error: Type mismatch
x
has type
Nat
but is expected to have type
ISize
-/
#guard_msgs in
example (x : Nat) : ISize := x
-- TODO: currently there is a global lossy instance `NatCast (BitVec w)`, that should be removed.