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-rw-r--r--advanced/adv-traits/src/main.rs161
1 files changed, 145 insertions, 16 deletions
diff --git a/advanced/adv-traits/src/main.rs b/advanced/adv-traits/src/main.rs
index 6ec0aac..659883c 100644
--- a/advanced/adv-traits/src/main.rs
+++ b/advanced/adv-traits/src/main.rs
@@ -8,27 +8,156 @@
// fn next(&mut self) -> Option<Self::Item>;
//}
//
-use std::ops::Add;
+//
+//#[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,
+// }
+// }
+//}
-#[derive(Debug, PartialEq)]
-struct Point {
- x: i32,
- y: i32,
-}
+//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;
-impl Add for Point {
- type Output = Point;
+struct Wrapper(Vec<String>);
- fn add(self, other: Point) -> Point {
- Point {
- x: self.x + other.x,
- y: self.y + other.y,
- }
+impl fmt::Display for Wrapper {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "[{}]", self.0.join(", "))
}
}
fn main() {
- assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
- Point { x: 3, y: 3 });
- println!("Done.");
+ let w = Wrapper(vec![String::from("hello"), String::from("world")]);
+ println!("w = {}", w);
}