error_set 0.9.1

Quick error declarations and automatic conversions between errors for precisely typed error handling. Inspired by Zig's error set type.
Documentation 
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use std::fmt::Debug;

use error_set::error_set;

error_set! {
    AuthError1<T: Debug> := {
        SourceStruct(std::fmt::Error) {},
        DoesNotExist {
            name: T,
            role: u32,
        },
        InvalidCredentials
    }
    AuthError2<T: Debug> := {
        SourceStruct(std::fmt::Error) {},
        DoesNotExist {
            name: T,
            role: u32,
        },
        InvalidCredentials
    }
    AuthError3<G: Debug> := {
        SourceStruct(std::fmt::Error) {},
        DoesNotExist {
            name: G,
            role: u32,
        },
        InvalidCredentials
    }
    LoginError := {
        IoError(std::io::Error),
    } || AuthError1 || AuthError2 || AuthError3
}

pub fn main() {}