Quick Error

Status:	production-ready
Documentation:	https://docs.rs/quick-error/

A macro which makes error types pleasant to write.

Features:

• Define enum type with arbitrary parameters
• Concise notation of Display and Error traits
• Full control of Display and Error trait implementation
• Any number of From traits
• Support for all enum-variants Unit, Tuple and Struct

Here is the comprehensive example:

quick_error!{
#[derive(Debug)]pubenumIoWrapper{Io(err: io::Error){
from()
display("I/O error: {}", err)
source(err)}Other(descr:&'staticstr){
display("Error {}", descr)}IoAt{ place:&'staticstr, err: io::Error}{
source(err)
display(me) -> ("io error at {}: {}", place, err)
from(s:String) -> {
place:"some string",
err: io::Error::new(io::ErrorKind::Other, s)}}Discard{
from(&'staticstr)}}}

License

Licensed under either of

• Apache License, Version 2.0, (./LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (./LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.