Trait astral::error::OptionExt

pub trait OptionExt<T> {
    fn ok_or_error<Kind, Context>(
        self,
        kind: Kind,
        context: Context
    ) -> Result<T, Error<Kind>>
    where
        Context: Into<Box<dyn Error + Send + Sync + 'static, Global>>;
    fn ok_or_error_with<Kind, Context, F>(
        self,
        kind: Kind,
        context: F
    ) -> Result<T, Error<Kind>>
    where
        Context: Into<Box<dyn Error + Send + Sync + 'static, Global>>,
        F: FnOnce() -> Context;
}
Expand description

Extension methods for Option.

Required Methods

Transforms the Option<T> into a Result<T, Error<Kind>>, mapping Some(v) to Ok(v) and None to Err(Error::new(kind, context)).

Example
use astral::error::OptionExt;

#[derive(Debug, PartialEq)]
enum MyErrorKind {
    Variant,
}

let option: Option<u32> = None;
let x = option.ok_or_error(MyErrorKind::Variant, "oh no!").unwrap_err();

assert_eq!(x.kind(), &MyErrorKind::Variant);

Transforms the Option<T> into a Result<T, Error<Kind>>, mapping Some(v) to Ok(v) and None to Err(Error::new(kind, context)) by applying the provided closure FnOnce() -> impl Into<Box<dyn error::Error + Send + Sync>>.

Example
use astral::error::OptionExt;

#[derive(Debug, PartialEq)]
enum MyErrorKind {
    Variant,
}

let option: Option<u32> = None;
let x = option.ok_or_error_with(MyErrorKind::Variant, || "oh no!").unwrap_err();

assert_eq!(x.kind(), &MyErrorKind::Variant);

Implementations on Foreign Types

Implementors