utils

src/lib.rs

@@ -27,6 +27,7 @@ pub use trait_set::trait_set;
 
 pub mod array;
 pub mod error;
+pub mod utils;
 
 pub mod fut;
 pub mod time;

src/utils.rs

@@ -0,0 +1,21 @@
+//! # Uncategorized useful functionality
+
+/// Hint that this branch is cold.
+#[inline(always)]
+pub const fn cold<T>(v: T) -> T {
+    v
+}
+
+/// Indicate that this value is unlikely to be true. Hint to
+/// the compiler.
+#[inline(always)]
+pub const fn unlikely(v: bool) -> bool {
+    if v { cold(true) } else { false }
+}
+
+/// Indicate that this value is likely to be true. Hint to
+/// the compiler.
+#[inline(always)]
+pub const fn likely(v: bool) -> bool {
+    if v { true } else { cold(false) }
+}