WIP: Add `const-fn` feature to attempt support for stable toolchain.

To get this to work, either `FnMut` traits need to be allowed in
`const fn` in stable, or `Handler::new` needs to be non-`const`.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 8e16b26..d0ddad5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,7 +15,7 @@
 //! Critical section support is supplied by the [`cs` module](cs).
 
 #![no_std]
-#![feature(const_fn)]
+#![cfg_attr(feature = "const-fn", feature(const_fn))]
 
 pub mod array;
 pub mod cs;