Trait ErrorContext 

pub trait ErrorContext<T: Display> {
    // Required method
    fn context(self, msg: T) -> Self;

    // Provided method
    fn with_context<F>(self, f: F) -> Self
       where F: FnOnce() -> T,
             Self: Sized { ... }
}

Required Methods

fn context(self, msg: T) -> Self

Attach context to an error.

Provided Methods

fn with_context<F>(self, f: F) -> Self

where F: FnOnce() -> T, Self: Sized,

Attach context lazily, so the message is only built when there is actually an error to attach it to.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T, M> ErrorContext<M> for Result<T, DecodeError>

where M: Display,

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

where F: FnOnce() -> M,

Only render the error on the Err case

fn context(self, msg: M) -> Result<T, DecodeError>

Implementors

impl<T: Display> ErrorContext<T> for DecodeError