Trait BackendError 

pub trait BackendError: Error { }

Associated error type used by all fallible backend methods.

Backends that are infallible (e.g. Headless, SoftwareRenderer) use core::convert::Infallible. Fallible backends (e.g. Crossterm) use std::io::Error.

Requiring core::error::Error rather than just Display + Debug lets generic code convert B::Error into Box<dyn Error> or any error-trait-based caller error with a plain ?, and exposes source() chains for concrete error types that wrap an inner error.

Examples

use retroglyph_core::backend::BackendError;
use core::fmt;

#[derive(Debug)]
struct MyBackendError;

impl fmt::Display for MyBackendError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "my backend failed")
    }
}

impl core::error::Error for MyBackendError {}
impl BackendError for MyBackendError {}

Implementations on Foreign Types

impl BackendError for Infallible

impl BackendError for Error

Available on crate feature std only.

Implementors