diff options
| -rw-r--r-- | src/librustc_mir/transform/check_consts/ops.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/librustc_mir/transform/check_consts/ops.rs b/src/librustc_mir/transform/check_consts/ops.rs index 950f48f03cd..acad56be604 100644 --- a/src/librustc_mir/transform/check_consts/ops.rs +++ b/src/librustc_mir/transform/check_consts/ops.rs @@ -52,7 +52,11 @@ pub trait NonConstOp: std::fmt::Debug { /// A `Downcast` projection. #[derive(Debug)] pub struct Downcast; -impl NonConstOp for Downcast {} +impl NonConstOp for Downcast { + fn feature_gate(tcx: TyCtxt<'_>) -> Option<bool> { + Some(tcx.features().const_if_match) + } +} /// A function call where the callee is a pointer. #[derive(Debug)] |