Trait Context

pub trait Context<O, E: Into<Box<dyn StdError + Send + Sync + 'static>>> {
    // Required methods
    fn context<T: 'static + Display + Debug>(
        self,
        kind: T,
    ) -> Result<O, Error<T>>;
    fn annotate(self) -> Result<O, Error<AnnotatedError>>;
    fn map_context<T: 'static + Display + Debug, F: FnOnce(&E) -> T>(
        self,
        op: F,
    ) -> Result<O, Error<T>>;
}

Convenience methods for Result<> to turn the error into a decorated Error

Required Methods

fn context<T: 'static + Display + Debug>(self, kind: T) -> Result<O, Error<T>>

Decorate the error with a kind of type T and the source Location

fn annotate(self) -> Result<O, Error<AnnotatedError>>

Decorate the error just with the source Location

fn map_context<T: 'static + Display + Debug, F: FnOnce(&E) -> T>( self, op: F, ) -> Result<O, Error<T>>

Decorate the error with a kind of type T produced with a FnOnce(&error) and the source Location

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<O, E: Into<Box<dyn StdError + Send + Sync + 'static>>> Context<O, E> for Result<O, E>

fn context<T: 'static + Display + Debug>(self, kind: T) -> Result<O, Error<T>>

fn annotate(self) -> Result<O, Error<AnnotatedError>>

fn map_context<T: 'static + Display + Debug, F: FnOnce(&E) -> T>( self, op: F, ) -> Result<O, Error<T>>

Implementors