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finish enums exercises

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This commit is contained in:
lukaszKielar 2020-06-21 21:15:06 +02:00
parent 3d6fb762ae
commit b26aaf2095
3 changed files with 26 additions and 19 deletions
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7
exercises/enums/enums1.rs
View File

@ -1,11 +1,12 @@
// enums1.rs // enums1.rs
// Make me compile! Execute `rustlings hint enums1` for hints! // Make me compile! Execute `rustlings hint enums1` for hints!
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
enum Message { enum Message {
// TODO: define a few types of messages as used below Quit,
Echo,
Move,
ChangeColor,
} }
fn main() { fn main() {

11
exercises/enums/enums2.rs
View File

@ -1,11 +1,12 @@
// enums2.rs // enums2.rs
// Make me compile! Execute `rustlings hint enums2` for hints! // Make me compile! Execute `rustlings hint enums2` for hints!
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
enum Message { enum Message {
// TODO: define the different variants used below Move { x: u8, y: u8 },
Echo(String),
ChangeColor(u8, u8, u8),
Quit,
} }
impl Message { impl Message {
@ -16,10 +17,10 @@ impl Message {
fn main() { fn main() {
let messages = [ let messages = [
Message::Move{ x: 10, y: 30 }, Message::Move { x: 10, y: 30 },
Message::Echo(String::from("hello world")), Message::Echo(String::from("hello world")),
Message::ChangeColor(200, 255, 255), Message::ChangeColor(200, 255, 255),
Message::Quit Message::Quit,
]; ];
for message in &messages { for message in &messages {

27
exercises/enums/enums3.rs
View File

@ -1,21 +1,22 @@
// enums3.rs // enums3.rs
// Address all the TODOs to make the tests pass! // Address all the TODOs to make the tests pass!
// I AM NOT DONE
enum Message { enum Message {
// TODO: implement the message variant types based on their usage below Move(Point),
Echo(String),
ChangeColor(u8, u8, u8),
Quit,
} }
struct Point { struct Point {
x: u8, x: u8,
y: u8 y: u8,
} }
struct State { struct State {
color: (u8, u8, u8), color: (u8, u8, u8),
position: Point, position: Point,
quit: bool quit: bool,
} }
impl State { impl State {
@ -36,7 +37,12 @@ impl State {
} }
fn process(&mut self, message: Message) { fn process(&mut self, message: Message) {
// TODO: create a match expression to process the different message variants match message {
Message::ChangeColor(r, g, b) => self.change_color((r, g, b)),
Message::Quit => self.quit(),
Message::Echo(s) => self.echo(s),
Message::Move(p) => self.move_position(p),
}
} }
} }
@ -46,14 +52,14 @@ mod tests {
#[test] #[test]
fn test_match_message_call() { fn test_match_message_call() {
let mut state = State{ let mut state = State {
quit: false, quit: false,
position: Point{ x: 0, y: 0 }, position: Point { x: 0, y: 0 },
color: (0, 0, 0) color: (0, 0, 0),
}; };
state.process(Message::ChangeColor(255, 0, 255)); state.process(Message::ChangeColor(255, 0, 255));
state.process(Message::Echo(String::from("hello world"))); state.process(Message::Echo(String::from("hello world")));
state.process(Message::Move(Point{ x: 10, y: 15 })); state.process(Message::Move(Point { x: 10, y: 15 }));
state.process(Message::Quit); state.process(Message::Quit);
assert_eq!(state.color, (255, 0, 255)); assert_eq!(state.color, (255, 0, 255));
@ -61,5 +67,4 @@ mod tests {
assert_eq!(state.position.y, 15); assert_eq!(state.position.y, 15);
assert_eq!(state.quit, true); assert_eq!(state.quit, true);
} }
} }