Module std::error
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[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` is a trait representing the basic expectations for error values,
i.e. values of type E`Ein` in Result<T, E>`Result. At a minimum, errors must provide a description, but they may optionally provide additional detail (via`. 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` method 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`cause` chains.
Traits
| Error |
Base functionality for all errors in Rust. |