thiserror

The thiserror crate provides macros to help avoid boilerplate when defining error types. It provides derive macros that assist in implementing From<T>, Display, and the Error trait.

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Speaker Notes

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  • Error 導出マクロは thiserror によって提供されます。このマクロには、エラー型を簡潔に定義するのに役立つ属性が数多く用意されています。
  • #[error] からのメッセージは、Display トレイトを導出するために使用されます。
  • Note that the (thiserror::)Error derive macro, while it has the effect of implementing the (std::error::)Error trait, is not the same this; traits and macros do not share a namespace.