1 files changed, 163 insertions, 0 deletions
diff --git a/rust-book/advanced/adv-traits/src/main.rs b/rust-book/advanced/adv-traits/src/main.rs
new file mode 100755
index 0000000..659883c
--- /dev/null
+++ b/rust-book/advanced/adv-traits/src/main.rs
@@ -0,0 +1,163 @@
+//fn main() {
+//    println!("Hello, world!");
+//}
+//
+//pub trait Iterator {
+//    type Item;
+//
+//    fn next(&mut self) -> Option<Self::Item>;
+//}
+//
+//
+//#[derive(Debug, PartialEq)]
+//struct Point {
+//    x: i32,
+//    y: i32,
+//}
+//
+//impl Add for Point {
+//    type Output = Point;
+//
+//    fn add(self, other: Point) -> Point {
+//        Point {
+//            x: self.x + other.x,
+//            y: self.y + other.y,
+//        }
+//    }
+//}
+
+//fn main() {
+//    assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
+//               Point { x: 3, y: 3 });
+//    println!("Done.");
+//}
+
+//trait Add<RHS=Self> {
+//    type Output;
+//
+//    fn add(self, rhs: RHS) -> Self::Output;
+//}
+
+//use std::ops::Add;
+//
+//struct Millimeters(u32);
+//struct Meters(u32);
+//
+//impl Add<Meters> for Millimeters {
+//    type Output = Millimeters;
+//
+//    fn add(self, other: Meters) -> Millimeters {
+//        Millimeters(self.0 + (other.0 * 1000))
+//    }
+//}
+
+
+//trait Pilot {
+//    fn fly(&self);
+//}
+//
+//trait Wizard {
+//    fn fly(&self);
+//}
+//
+//struct Human;
+//
+//impl Pilot for Human {
+//    fn fly(&self) {
+//        println!("Because I was inverted.");
+//    }
+//}
+//
+//impl Wizard for Human {
+//    fn fly(&self) {
+//        println!("Fly, you fools.");
+//    }
+//}
+//
+//impl Human {
+//    fn fly(&self) {
+//        println!("*feels real loose like a long-neck goose*");
+//    }
+//}
+//
+//
+//trait Animal {
+//    fn baby_name() -> String;
+//}
+//
+//struct Dog;
+//
+//impl Dog {
+//    fn baby_name() -> String {
+//        String::from("Spot")
+//    }
+//}
+//
+//impl Animal for Dog {
+//    fn baby_name() -> String {
+//        String::from("puppy")
+//    }
+//}
+
+
+//fn main() {
+//    let person = Human;
+//    person.fly();
+//    Pilot::fly(&person);
+//    Wizard::fly(&person);
+//
+//
+//    println!("A baby dog is called a {}", <Dog as Animal>::baby_name());
+//
+//
+//    println!("Done.");
+//}
+//
+
+
+//use std::fmt;
+//
+//trait OutlinePrint: fmt::Display {
+//    fn outline_print(&self) {
+//        let output = self.to_string();
+//        let len = output.len();
+//        println!("{}", "*".repeat(len + 4));
+//        println!("*{}*", " ".repeat(len + 2));
+//        println!("* {} *", output);
+//        println!("*{}*", " ".repeat(len + 2));
+//        println!("{}", "*".repeat(len + 4));
+//    }
+//}
+//
+//struct Point { 
+//    x: i32,
+//    y: i32,
+//}
+//
+//impl OutlinePrint for Point {}
+//
+//impl fmt::Display for Point {
+//    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+//        write!(f, "({}, {})", self.x, self.y)
+//    }
+//}
+//
+//fn main() {
+//    let point = Point { x: 5, y: 6 };
+//    point.outline_print();
+//}
+
+use std::fmt;
+
+struct Wrapper(Vec<String>);
+
+impl fmt::Display for Wrapper {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "[{}]", self.0.join(", "))
+    }
+}
+
+fn main() {
+    let w = Wrapper(vec![String::from("hello"), String::from("world")]);
+    println!("w = {}", w);
+}