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Add notes about traits.

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Andrew Walbran 2023-03-13 16:16:02 +00:00
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src/bare-metal/aps/uart/traits.md
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# More traits
We derived the `Debug` trait. It would be useful to implement a few more traits too.
```rust,editable,compile_fail
{{#include ../examples/src/pl011_minimal.rs:Traits}}
```
<details>
* Implementing `Write` lets us use the `write!` and `writeln!` macros with our `Uart` type.
</details>