Trait Context

pub trait Context<T, E>: Sealed {
    // Required methods
    fn context<C>(self, context: C) -> Result<T, Error>
       where C: Display + Send + Sync + 'static;
    fn with_context<C, F>(self, f: F) -> Result<T, Error>
       where C: Display + Send + Sync + 'static,
             F: FnOnce() -> C;
}

Attach more context to an error.

Inspired by anyhow::Context.

Required Methods

fn context<C>(self, context: C) -> Result<T, Error>

where C: Display + Send + Sync + 'static,

Wrap the error value with additional context.

fn with_context<C, F>(self, f: F) -> Result<T, Error>

where C: Display + Send + Sync + 'static, F: FnOnce() -> C,

Wrap the error value with additional context that is evaluated lazily only once an error does occur.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

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

fn context<C>(self, context: C) -> Result<T, Error>

where C: Display + Send + Sync + 'static,

fn with_context<C, F>(self, context: F) -> Result<T, Error>

where C: Display + Send + Sync + 'static, F: FnOnce() -> C,

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

where E: Error + Send + Sync + 'static,

fn context<C>(self, context: C) -> Result<T, Error>

where C: Display + Send + Sync + 'static,

fn with_context<C, F>(self, context: F) -> Result<T, Error>

where C: Display + Send + Sync + 'static, F: FnOnce() -> C,

Implementors