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#[derive(Debug)] | |
enum Bar { | |
A, | |
B | |
} | |
impl Bar { | |
fn as_ref(&self) -> Bar { | |
match self { | |
Bar::A => Bar::A, | |
Bar::B => Bar::B | |
} | |
} | |
} | |
#[derive(Debug)] | |
enum Message<T> { | |
Quit, | |
Move { x: i32, y: i32 }, | |
WriteString(T), | |
ChangeColor(i32, i32, i32) | |
} | |
impl Message<String> { | |
fn as_ref(&self) -> Message<&String> { | |
match self { | |
Message::Quit => Message::Quit, | |
Message::Move { x: x, y: y } => Message::Move { x: *x, y: *y }, | |
Message::WriteString(ref string) => Message::WriteString(string), | |
Message::ChangeColor(r, g, b) => Message::ChangeColor(*r, *g, *b) | |
} | |
} | |
} | |
impl<'a> Message<&'a String> { | |
fn as_ref(&self) -> Self { | |
match self { | |
Message::Quit => Message::Quit, | |
Message::Move { x: x, y: y } => Message::Move { x: *x, y: *y }, | |
Message::WriteString(string) => Message::WriteString(string), | |
Message::ChangeColor(r, g, b) => Message::ChangeColor(*r, *g, *b) | |
} | |
} | |
} | |
fn main() { | |
let b = Bar::B {}; | |
let b = b.as_ref(); | |
println!("{:?}", b); | |
let s = "s".to_string(); | |
let m = &Message::WriteString(s); | |
println!("{:?}", m.as_ref()) | |
} |
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