I think that everybody should instead read proposal that introduced this feature, P0479R2[1] [1] https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0479

I think that everybody should instead read proposal that introduced this feature, P0479R2[1] [1] https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0479r2.html https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p04... and look at code in the wild [2] https://github.com/search?q=[[likely]]+language%3Ac%2B%2B&type=code https://github.com/search?q=[[likely]]+language%3Ac%2B%2B&ty...