rs-eda 0.1.5

rust EDA event-driven framework
Documentation 
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use std::{
    error::Error,
    fmt::{self, Display},
    future::Future,
};

pub type MyError<T> = Result<T, BError>;

#[derive(Debug)]
pub struct BError {
    msg: String,
}
impl BError {
    pub fn with_msg(msg: &str) -> Self {
        Self {
            msg: msg.to_string(),
        }
    }
    pub fn get_msg(&self) -> &str {
        &self.msg
    }
}
impl Error for BError {}
impl Display for BError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.msg)
    }
}

// 执行MyError相关的方法与函数
pub async fn my_err_fn<F, FUT, T>(f: F) -> MyError<T>
where
    F: FnOnce() -> FUT,
    FUT: Future<Output = MyError<T>>,
{
    let res = f().await?;
    Ok(res)
}

#[macro_export]
macro_rules! my_error {
    ($res:expr) => {
        match $res {
            core::result::Result::Ok(x) => x,
            core::result::Result::Err(e) => {
                let err_msg = &e.to_string();
                return core::result::Result::Err(BError::with_msg(err_msg));
            }
        }
    };
}