1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
// 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 } });
}
|
