Trait errata::FallibleExt

pub trait FallibleExt<T> {
    // Required method
    fn fail(self, msg: impl Display) -> T;
}

The trait providing fail. Implemented for Option<T> and Result<T, E: Display>.

Required Methods

fn fail(self, msg: impl Display) -> T

Exits the program cleanly, calling destructors and printing an error message.

If you enable feature color, prints in bold red.

Usage:

let bad: Option<i32> = None;

// Prints the text verbatim to stderr, then exits with code 1.
bad.fail("Expected bad to contain a value");

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl<T> FallibleExt<T> for Option<T>

fn fail(self, msg: impl Display) -> T

impl<T, E: Display> FallibleExt<T> for Result<T, E>

fn fail(self, msg: impl Display) -> T

Implementors