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)] pub enum IoWrapper { Io(err: io::Error) { from() display("I/O error: {}", err) source(err) } Other(descr: &'static str) { display("Error {}", descr) } IoAt { place: &'static str, 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(&'static str) } } }

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.

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.