如何实现具有生命周期的特征一般实现特征
How to implement trait with lifetime generically that implements trait
如何执行以下操作?
trait Foo {}
trait Bar<'a> {}
impl<S> S for Bar<'_> where S: Foo {}
确实有@user4815162342的回答:
impl<'a, S> Bar<'a> for S where S: Foo {}
您还可以为特征添加默认实现:
trait Bar {
pub fn hello() {
println!("Hello, world!");
}
}
struct Foo {}
impl Bar for Foo {}
// ...
Foo::hello();
如何执行以下操作?
trait Foo {}
trait Bar<'a> {}
impl<S> S for Bar<'_> where S: Foo {}
确实有@user4815162342的回答:
impl<'a, S> Bar<'a> for S where S: Foo {}
您还可以为特征添加默认实现:
trait Bar {
pub fn hello() {
println!("Hello, world!");
}
}
struct Foo {}
impl Bar for Foo {}
// ...
Foo::hello();