Module std::error
[−]
[src]
Traits for working with Errors.
The Error
`Error` trait
Error
`Erroris a trait representing the basic expectations for error values, i.e. values of type
Ein
` in Result<T, E>
. At a minimum, errors must provide
a description, but they may optionally provide additional detail (via
Display
`Display`) and cause chain information:
use std::fmt::Display; trait Error: Display { fn description(&self) -> &str; fn cause(&self) -> Option<&Error> { None } }
The cause
`causemethod is generally used when errors cross "abstraction boundaries", i.e. when a one module must report an error that is "caused" by an error from a lower-level module. This setup makes it possible for the high-level module to provide its own errors that do not commit to any particular implementation, but also reveal some of its implementation for debugging via
cause` chains.
Traits
Error |
Base functionality for all errors in Rust. |