Trait Context 

pub trait Context<D> {
    type Output;

    // Required methods
    fn context(self, msg: &'static str) -> Self::Output;
    fn with_context<F, M>(self, with_msg: F) -> Self::Output
       where F: FnOnce() -> M,
             M: Display;
}

Context for Result-like types

Required Associated Types

type Output

Required Methods

fn context(self, msg: &'static str) -> Self::Output

Adds context to this result, if it’s an error

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

Adds context to this result lazily, if it’s an error

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T, D> Context<D> for Option<T>

where D: Default,

type Output = Result<T, AppError<D>>

fn context(self, msg: &'static str) -> Self::Output

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

impl<T, D> Context<D> for Result<T, &AppError<D>>

where D: Default,

type Output = Result<T, AppError<D>>

fn context(self, msg: &'static str) -> Self::Output

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

impl<T, D> Context<D> for Result<T, &mut AppError<D>>

where D: Default,

type Output = Result<T, AppError<D>>

fn context(self, msg: &'static str) -> Self::Output

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

impl<T, D> Context<D> for Result<T, AppError<D>>

where D: Default,

type Output = Result<T, AppError<D>>

fn context(self, msg: &'static str) -> Self::Output

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

impl<T, E, D> Context<D> for Result<T, E>

where E: StdError, D: Default,

type Output = Result<T, AppError<D>>

fn context(self, msg: &'static str) -> Self::Output

fn with_context<F, M>(self, with_msg: F) -> Self::Output

where F: FnOnce() -> M, M: Display,

Implementors