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rust如何优雅的写错误处理

rust如何优雅的写错误处理

定义error.rs

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use derive_more::From;

pub type Result<T> = core::result::Result<T, Error>;

#[derive(Debug, From)]
pub enum Error {

    #[from]
    ParamsErr(String),

}

// region:    --- Error Boilerplate

impl core::fmt::Display for Error {
    fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::result::Result<(), core::fmt::Error> {
        write!(fmt, "{self:?}")
    }
}

impl std::error::Error for Error {}

// endregion: --- Error Boilerplate

main.rs

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mod error;
use error::{Error, Result};
fn main() -> Result<()>{
    Ok(())
}

Cargo.toml

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[dependencies]
derive_more = { version = "1.0.0-beta", features = ["from", "display"] }

参考

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