Rust 将生存期传递给结构
我有这样的代码:Rust 将生存期传递给结构,rust,reference,traits,lifetime,Rust,Reference,Traits,Lifetime,我有这样的代码: pub trait Action { fn execute(&self); } struct AddAction<'a> { rpn_calculator: &'a RpnCalculator } struct DeductAction<'a> { rpn_calculator: &'a RpnCalculator } impl Action for DeductAction<'_> {
pub trait Action {
fn execute(&self);
}
struct AddAction<'a> {
rpn_calculator: &'a RpnCalculator
}
struct DeductAction<'a> {
rpn_calculator: &'a RpnCalculator
}
impl Action for DeductAction<'_> {
fn execute(&self) {
// ...
}
}
impl Action for AddAction<'_> {
fn execute(&self) {
// ...
}
}
impl<'a> RpnCalculator {
fn actions(&self) -> Vec<Box<dyn Action + 'a>> {
let mut actions: Vec<Box<dyn Action + 'a>> = vec![
Box::new(AddAction { rpn_calculator: &self })
Box::new(AddAction { rpn_calculator: &self })
// ...
];
// ...
actions
}
}
因此,我在向量声明中有
'a
,但它仍然不起作用。您可能应该使用fn操作(&'a self)
,因为生命周期
在dyn Action+中使用的'a
与生命周期相关
这是否回答了您的问题?
Box::new(AddAction { rpn_calculator: &self })