Trait ErrOr

pub trait ErrOr {
    type Err;

    // Required method
    fn err_or<OK>(self, ok: OK) -> Result<OK, Self::Err>;
}

Expand description

The SomeErr trait provides a method for converting an Option into a Result by treating Some values as Err and None values as Ok.

§Examples

use some_to_err::ErrOr;

let some: Option<&str> = Some("Error");
let result = some.err_or(42);
assert_eq!(result, Err("Error"));

use some_to_err::ErrOr;

let none: Option<&str> = None;
let result = none.err_or(42);
assert_eq!(result, Ok(42));

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.