pub extern "rust-intrinsic" fn unlikely(b: bool) -> bool
Hints to the compiler that branch condition is likely to be false. Returns the value passed to it.
Any use other than with if
statements will probably not have an effect.
This intrinsic does not have a stable counterpart.
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/intrinsics/fn.unlikely.html