Rust std::ops::BitOrAssign用法及代码示例

use std::ops::BitOrAssign;

#[derive(Debug, PartialEq)]
struct PersonalPreferences {
    likes_cats:bool,
    likes_dogs:bool,
}

impl BitOrAssign for PersonalPreferences {
    fn bitor_assign(&mut self, rhs:Self) {
        self.likes_cats |= rhs.likes_cats;
        self.likes_dogs |= rhs.likes_dogs;
    }
}

let mut prefs = PersonalPreferences { likes_cats:true, likes_dogs:false };
prefs |= PersonalPreferences { likes_cats:false, likes_dogs:true };
assert_eq!(prefs, PersonalPreferences { likes_cats:true, likes_dogs:true });