accel: add initial flag for future coverage exclusion

Author: mdekstrand

Cargo.toml

@@ -41,6 +41,9 @@ numpy = "^0.29"
 [dev-dependencies]
 ntest = "^0.9"
 
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ["cfg(coverage_nightly)"] }
+
 [profile.dev]
 opt-level = 2
 debug-assertions = true

src/accel/lib.rs

@@ -3,7 +3,7 @@
 // Copyright (C) 2023-2026 Drexel University.
 // Licensed under the MIT license, see LICENSE.md for details.
 // SPDX-License-Identifier: MIT
-
+#![cfg_attr(coverage_nightly, feature(coverage_attribute))]
 use pyo3::{exceptions::PyRuntimeError, prelude::*};
 
 mod als;