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29 lines
No EOL
591 B
Markdown
29 lines
No EOL
591 B
Markdown
# Mapping Errors
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Now let's get more rust idiomatic by using `.map_err()`.
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~~~rust
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{{#include ../examples/tutorial3.rs}}
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# #[allow(dead_code)]
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# mod chainerror {
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{{#rustdoc_include ../src/lib.rs:-1}}
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# }
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~~~
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If you compare the output to the previous example, you will see,
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that:
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~~~
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Error: src/main.rs:19: "func1 error"
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~~~
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changed to just:
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~~~
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src/main.rs:16: "func1 error"
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~~~
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This is, because we caught the error of `func1()` in `main()` and print it out ourselves.
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We can now control, whether to output in `Debug` or `Display` mode.
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Maybe depending on `--debug` as a CLI argument. |