Derive macro for the error2 crate.

This crate provides the #[derive(Error2)] procedural macro for automatically implementing error types with backtrace support.

Usage

use error2::prelude::*;

#[derive(Debug, Error2)]
pub enum MyError {
    #[error2(display("IO error"))]
    Io {
        source: std::io::Error,
        backtrace: Backtrace,
    },
}

See the main error2 crate documentation for complete usage information.