add a "const-fn" feature

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index df0ccbb..540bc4d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,6 +30,12 @@
 //! API docs for details.
 //!
 //! The disadvantage is that `inline-asm` requires a nightly toolchain.
+//!
+//! ## `const-fn`
+//!
+//! Enabling this feature turns the `Mutex.new` constructor into a `const fn`.
+//!
+//! This feature requires a nightly toolchain.
 
 #![cfg_attr(feature = "inline-asm", feature(asm))]
 #![deny(missing_docs)]