Trait scoped::Failure

pub trait Failure {
    fn is_error(&self) -> bool;
}

A trait to annotate whether a type is success or failure.

Required Methods

fn is_error(&self) -> bool

Returns true if the type is in a failure state, false otherwise.

Implementations on Foreign Types

impl<T, E> Failure for Result<T, E>

fn is_error(&self) -> bool

Result::Ok is success, Result::Err is failure.

impl<T> Failure for Option<T>

fn is_error(&self) -> bool

Option::Some is success, Option::None is failure.

Implementors