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34 lines
852 B
Markdown
34 lines
852 B
Markdown
# Debug for the ErrorKind
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One small improvement at the end of the tutorial is to fix the debug output of
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`Func1ErrorKind`. As you probably noticed, the output doesn't say much of the enum.
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~~~
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Debug Error:
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src/main.rs:35: Func2
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[…]
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~~~
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As a lazy shortcut, we implement `Debug` by calling `Display` and end up with
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~~~
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Debug Error:
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src/main.rs:40: func1 error calling func2
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[…}
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~~~
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which gives us a lot more detail.
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To create your own Errors, you might find [crates](https://crates.io) which crate enum `Display+Debug` via derive macros.
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Also noteworthy is [custom_error](https://crates.io/crates/custom_error) to define your custom errors,
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which can then be used with `chainerror`.
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~~~rust
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use crate::chainerror::*;
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{{#include ../examples/tutorial11.rs:2:}}
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# #[allow(dead_code)]
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# mod chainerror {
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{{#includecomment ../src/lib.rs}}
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# }
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~~~ |