Trait crates_index::ResultExt

pub trait ResultExt<T> {
    fn chain_err<F, EK>(self, callback: F) -> Result<T, Error>
    where
        F: FnOnce() -> EK,
        EK: Into<ErrorKind>;
}

Additional methods for Result, for easy interaction with this crate.

Required methods

fn chain_err<F, EK>(self, callback: F) -> Result<T, Error> where
    F: FnOnce() -> EK,
    EK: Into<ErrorKind>, 

If the Result is an Err then chain_err evaluates the closure, which returns some type that can be converted to ErrorKind, boxes the original error to store as the cause, then returns a new error containing the original error.

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Implementations on Foreign Types

impl<T, E> ResultExt<T> for Result<T, E> where
    E: Error + Send + 'static, 

fn chain_err<F, EK>(self, callback: F) -> Result<T, Error> where
    F: FnOnce() -> EK,
    EK: Into<ErrorKind>, 

impl<T> ResultExt<T> for Option<T>

fn chain_err<F, EK>(self, callback: F) -> Result<T, Error> where
    F: FnOnce() -> EK,
    EK: Into<ErrorKind>, 

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Implementors

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