Trait IsErrOr 

pub trait IsErrOr<T> {
    // Required method
    fn is_err_or<F: FnOnce(T) -> bool>(self, f: F) -> bool;
}

Tests whether a result is an error or its success value matches a predicate.

Every Err result returns true without exposing the error. An Ok result is consumed and passed to the predicate.

Required Methods

fn is_err_or<F: FnOnce(T) -> bool>(self, f: F) -> bool

Returns true for any error or a matching success value.

The predicate is called only for the Ok branch. Both the success value and any error are consumed.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

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