Trait std::ops::Residual

pub trait Residual<O> {
    type TryType: Try<Output = O, Residual = Self>;
}

🔬This is a nightly-only experimental API. (try_trait_v2_residual #91285)

允许检索实现 Try 的规范类型，该类型具有此类型作为它的残差，并允许它保留 O 作为它的输出。

如果您将 Try trait 视为将类型拆分为其 Try::Output 和 Try::Residual 组件，则可以将它们重新组合在一起。

例如，Result<T, E>: Try<Output = T, Residual = Result<Infallible, E>>，在另一个方向上，<Result<Infallible, E> as Residual<T>>::TryType = Result<T, E>。

Required Associated Types

type TryType: Try<Output = O, Residual = Self>

🔬This is a nightly-only experimental API. (try_trait_v2_residual #91285)

此元函数的 “return” 类型。

Implementors

impl<B, C> Residual<C> for ControlFlow<B, Infallible>

type TryType = ControlFlow<B, C>

impl<T> Residual<T> for Option<Infallible>

type TryType = Option<T>

impl<T, E> Residual<T> for Result<Infallible, E>

type TryType = Result<T, E>