Error Stack Derive

A simple crate with a simple derive macro to make your error handling workflow simpler than ever :)

Check out the examples directory for, well, examples and check out the docs for more information about the macro.

Or, here's one

```rust use std::fs::readtostring;

use errorstack::{IntoReport, ResultExt}; use errorstack_derive::ErrorStack;

[derive(ErrorStack, Debug)]

[error_message(&format!("Error occured with foo ({}, {})", self.bar, self.baz))]

struct FooError { bar: u8, baz: u8, }

fn main() { let foo = readtostring("foo.txt") .report() .change_context(FooError { bar: 0, baz: 1 });

assert!(foo.is_err());
let err = foo.err().unwrap();
// Error occured with foo (0, 1)
//              at examples/structs.rs:16:10
// 
// Caused by:
//    0: No such file or directory (os error 2)
//              at examples/structs.rs:15:10
// FooError { bar: 0, baz: 1 }
println!("{:?}\n{:?}", err, err.downcast_ref::<FooError>().unwrap())

} ```