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Enum3 with errors that should be highlighted
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// enums3.rs | |
// Address all the TODOs to make the tests pass! | |
// Execute `rustlings hint enums3` or use the `hint` watch subcommand for a hint. | |
// I AM NOT DONE | |
enum Message { | |
ChangeColor(u8, u8, u8), | |
Echo(String), | |
Move(Point), | |
Quit, | |
} | |
struct Point { | |
x: u8, | |
y: u8, | |
} | |
struct State { | |
color: (u8, u8, u8), | |
position: Point, | |
quit: bool, | |
} | |
impl State { | |
fn change_color(&mut self, color: (u8, u8, u8)) { | |
self.color = color; | |
} | |
fn quit(&mut self) { | |
self.quit = true; | |
} | |
fn echo(&self, s: String) { | |
println!("{}", s); | |
} | |
fn move_position(&mut self, p: Point) { | |
self.position = p; | |
} | |
fn process(&mut self, message: Message) { | |
// There are two errors on line 48: Move() does not match or ignore its field (E0023), | |
// and not_an_inscope_variable is not found in this scope (E0425) | |
match message { | |
Message::ChangeColor(red, green, blue) => self.change_color((red, green, blue)), | |
Message::Echo(echo_message) => self.echo(echo_message), | |
Message::Move() => self.move_position(not_an_inscope_variable), | |
Message::Quit => self.quit(), | |
} | |
} | |
} | |
#[cfg(test)] | |
mod tests { | |
use super::*; | |
#[test] | |
fn test_match_message_call() { | |
let mut state = State { | |
quit: false, | |
position: Point { x: 0, y: 0 }, | |
color: (0, 0, 0), | |
}; | |
state.process(Message::ChangeColor(255, 0, 255)); | |
state.process(Message::Echo(String::from("hello world"))); | |
state.process(Message::Move(Point { x: 10, y: 15 })); | |
state.process(Message::Quit); | |
assert_eq!(state.color, (255, 0, 255)); | |
assert_eq!(state.position.x, 10); | |
assert_eq!(state.position.y, 15); | |
assert_eq!(state.quit, true); | |
} | |
} |
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