From ec0825fe194cdb26a7f0b142d552d10ca8f65e76 Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@gmail.com>
Date: Thu, 9 Jan 2020 22:27:28 +0000
Subject: [PATCH] Make Bytes::new const fn (#356)

---
 src/bytes.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/bytes.rs b/src/bytes.rs
index 9e4dd91..93ab84b 100644
--- a/src/bytes.rs
+++ b/src/bytes.rs
@@ -96,8 +96,18 @@ impl Bytes {
     /// assert_eq!(&b[..], b"");
     /// ```
     #[inline]
+    #[cfg(not(all(loom, test)))]
+    pub const fn new() -> Bytes {
+        // Make it a named const to work around
+        // "unsizing casts are not allowed in const fn"
+        const EMPTY: &[u8] = &[];
+        Bytes::from_static(EMPTY)
+    }
+
+    #[cfg(all(loom, test))]
     pub fn new() -> Bytes {
-        Bytes::from_static(b"")
+        const EMPTY: &[u8] = &[];
+        Bytes::from_static(EMPTY)
     }
 
     /// Creates a new `Bytes` from a static slice.