mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
30 lines
565 B
Rust
30 lines
565 B
Rust
// run-pass
|
|
|
|
use std::fmt;
|
|
|
|
struct Thingy {
|
|
x: isize,
|
|
y: isize
|
|
}
|
|
|
|
impl fmt::Debug for Thingy {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "{{ x: {:?}, y: {:?} }}", self.x, self.y)
|
|
}
|
|
}
|
|
|
|
struct PolymorphicThingy<T> {
|
|
x: T
|
|
}
|
|
|
|
impl<T:fmt::Debug> fmt::Debug for PolymorphicThingy<T> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "{:?}", self.x)
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
println!("{:?}", Thingy { x: 1, y: 2 });
|
|
println!("{:?}", PolymorphicThingy { x: Thingy { x: 1, y: 2 } });
|
|
}
|