/// Either a re-export of std::error::Error or a new identical trait, depending /// on whether Serde's "std" feature is enabled. /// /// Serde's error traits [`serde::ser::Error`] and [`serde::de::Error`] require /// [`std::error::Error`] as a supertrait, but only when Serde is built with /// "std" enabled. Data formats that don't care about no\_std support should /// generally provide their error types with a `std::error::Error` impl /// directly: /// /// ```edition2021 /// #[derive(Debug)] /// struct MySerError {...} /// /// impl serde::ser::Error for MySerError {...} /// /// impl std::fmt::Display for MySerError {...} /// /// // We don't support no_std! /// impl std::error::Error for MySerError {} /// ``` /// /// Data formats that *do* support no\_std may either have a "std" feature of /// their own: /// /// ```toml /// [features] /// std = ["serde/std"] /// ``` /// /// ```edition2021 /// #[cfg(feature = "std")] /// impl std::error::Error for MySerError {} /// ``` /// /// ... or else provide the std Error impl unconditionally via Serde's /// re-export: /// /// ```edition2021 /// impl serde::ser::StdError for MySerError {} /// ``` pubtrait Error: Debug + Display { /// The underlying cause of this error, if any. fn source(&self) -> Option<&(Error + 'static)> {
None
}
}
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(vorverarbeitet am 2026-06-19)
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