laurens/rust_the_book
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This commit is contained in:
laurens 2020-05-22 16:51:56 +02:00
parent 47599b6c7e
commit d4972c2d62
1 changed files with 13 additions and 10 deletions
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23
enum_example/src/main.rs
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@ -10,7 +10,7 @@ struct Color(i32, i32, i32);
#[derive(Debug)] #[derive(Debug)]
enum Message { enum Message {
Quit, Quit,
Move { x: i32, y: i32}, Move { x: i32, y: i32 },
Write(String), Write(String),
ChangeColor(Color), ChangeColor(Color),
YetAnotherMessage, YetAnotherMessage,
@ -18,17 +18,20 @@ enum Message {
impl Message { impl Message {
fn print(&self) { fn print(&self) {
println!("I don't do anything but can be called with any type: {:?}", self); println!(
"I don't do anything but can be called with any type: {:?}",
self
);
} }
fn call(&self) { fn call(&self) {
match self { match self {
Message::Quit => println!("Calling on a quit type!"), Message::Quit => println!("Calling on a quit type!"),
Message::Move { x, y } => println!("Calling on a move type: {}, {}!", x, y), Message::Move { x, y } => println!("Calling on a move type: {}, {}!", x, y),
Message::Write (s) => println!("Calling on a write type: {}!", s), Message::Write(s) => println!("Calling on a write type: {}!", s),
Message::ChangeColor (c) => println!("Calling on a color type: {:#?}!", c), Message::ChangeColor(c) => println!("Calling on a color type: {:#?}!", c),
_ => println!("Default case in a match"), _ => println!("Default case in a match"),
} }
} }
} }
@ -41,13 +44,13 @@ fn main() {
let msg = Message::Quit; let msg = Message::Quit;
msg.print(); msg.print();
msg.call(); msg.call();
let msg = Message::Move{ x: 1, y:2}; let msg = Message::Move { x: 1, y: 2 };
msg.print(); msg.print();
msg.call(); msg.call();
let msg = Message::Write(String::from("Hello enum")); let msg = Message::Write(String::from("Hello enum"));
msg.print(); msg.print();
msg.call(); msg.call();
let msg = Message::ChangeColor(Color(1,2,3)); let msg = Message::ChangeColor(Color(1, 2, 3));
msg.print(); msg.print();
msg.call(); msg.call();
let msg = Message::YetAnotherMessage; let msg = Message::YetAnotherMessage;