Trait ResultExt

pub trait ResultExt<T, E> {
    // Required methods
    fn err_into<E2>(self) -> Result<T, E2>
       where E: Into<E2>;
    fn err_to_string_with_causes(&self) -> Option<String>
       where E: Error;
    fn map_err_to_string_with_causes(self) -> Result<T, String>
       where E: Error;
    fn infallible_unwrap(self) -> T
       where E: Into<Infallible>;
}

Available on crate feature process only.

Extension methods for std::result::Result.

Required Methods

fn err_into<E2>(self) -> Result<T, E2>

where E: Into<E2>,

Applies Into::into to a contained Err value, leaving an Ok value untouched.

fn err_to_string_with_causes(&self) -> Option<String>

where E: Error,

Formats an Err value as a detailed error message, preserving any context information.

This is equivalent to format!("{}", err.display_with_causes()), except that it’s easier to type.

fn map_err_to_string_with_causes(self) -> Result<T, String>

where E: Error,

Maps a Result<T, E> to Result<T, String> by converting the Err result into a string, along with the chain of source errors, if any.

fn infallible_unwrap(self) -> T

where E: Into<Infallible>,

Safely unwraps a Result<T, Infallible>, where Infallible is a type that represents when an error cannot occur.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

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

fn err_into<E2>(self) -> Result<T, E2>

where E: Into<E2>,

fn err_to_string_with_causes(&self) -> Option<String>

where E: Error,

fn map_err_to_string_with_causes(self) -> Result<T, String>

where E: Error,

fn infallible_unwrap(self) -> T

where E: Into<Infallible>,

Implementors