Trait ResContext 

pub trait ResContext<T, E> {
    // Required methods
    fn context<M>(self, msg: M) -> Result<T, ErrorContext>
       where M: Into<SharedString>;
    fn with_context<M, F>(self, f: F) -> Result<T, ErrorContext>
       where M: Into<SharedString>,
             F: FnOnce() -> M;
}

A helper trait for annotating result errors and empty options

Required Methods

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

where M: Into<SharedString>,

Map the error into a new cloneable ErrorContext error, annotated with a specified context message

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

where M: Into<SharedString>, F: FnOnce() -> M,

Map the error into a new cloneable ErrorContext error, annotated with a dynamically computed context message

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> ResContext<T, Infallible> for Option<T>

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

where M: Into<SharedString>,

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

where M: Into<SharedString>, F: FnOnce() -> M,

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

where E: ErrContext,

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

where M: Into<SharedString>,

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

where M: Into<SharedString>, F: FnOnce() -> M,

Implementors