pub extern "rust-intrinsic" fn unlikely(b: bool) -> bool
🔬 This is a nightly-only experimental API. (
intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
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.
Note that, unlike most intrinsics, this is safe to call;
it does not require an
Therefore, implementations must not require the user to uphold
any safety invariants.
This intrinsic does not have a stable counterpart.