chainerror/booksrc/tutorial11.md

Debug for the ErrorKind

One small improvement at the end of the tutorial is to fix the debug output of Func1ErrorKind. As you probably noticed, the output doesn't say much of the enum.

Debug Error:
src/main.rs:35: Func2
[…]

As a lazy shortcut, we implement Debug by calling Display and end up with

Debug Error:
src/main.rs:40: func1 error calling func2
[…}

which gives us a lot more detail.

use crate::chainerror::*;
{{#include ../examples/tutorial11.rs:2:}}
# #[allow(dead_code)]
# mod chainerror {
{{#includecomment ../src/lib.rs}}
# }