Crate likely_stable

This crates brings likely and unlikely branch prediction hints to stable rust

use likely_stable::{likely,unlikely};
use rand::random;

if likely(random::<i32>() > 10) {
    println!("likely!")
} else {
    println!("unlikely!")
}

It also provides if_likely and if_unlikely for branch prediction for if let statements.

use likely_stable::if_likely;
use rand::random;

let v = Some(random()).filter(|v:&i32| *v > 10);

if_likely!{let Some(v) = v => {
    println!("likely!")
} else {
    println!("unlikely!")
}};

Moreover traits LikelyBool, LikelyOption and LikelyResult provides likely and unlikely versions of the methods commonly used for types bool, Option and Result

use likely_stable::LikelyOption;
use rand::random;

let v = Some(random()).filter(|v:&i32| *v > 10);

v.map_or_else_likely(
    || println!("unlikely"),
    |v| println!("likely {}",v));

Macros

if_likely	If statement which inform the compiler that the first branch will be the most taken branch
if_unlikely	If statement which inform the compiler that the first branch will be the most taken branch

Traits

LikelyBool	Likely trait for bool
LikelyOption	Likely trait for Options
LikelyResult	Likely trait for Result

Functions

likely	Brings likely to stable rust.
unlikely	Brings unlikely to stable rust.