Trait ResultExt 

pub trait ResultExt<T, E1> {
    // Required methods
    fn context<C, E2>(self, ctx: C) -> Result<T, E2>
       where C: ErrorContext<Err = E2, Source = E1>;
    fn with_context<C, E2, F>(self, f: F) -> Result<T, E2>
       where F: FnOnce(&E1) -> C,
             C: ErrorContext<Err = E2, Source = E1>;
}

Extension trait for Result which adds useful methods to use ErrorContexts.

Required Methods

fn context<C, E2>(self, ctx: C) -> Result<T, E2>

where C: ErrorContext<Err = E2, Source = E1>,

Add the given context to the error of this result.

fn with_context<C, E2, F>(self, f: F) -> Result<T, E2>

where F: FnOnce(&E1) -> C, C: ErrorContext<Err = E2, Source = E1>,

Add the given context to the error of this result, lazily.

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, E1> ResultExt<T, E1> for Result<T, E1>

fn context<C, E2>(self, ctx: C) -> Result<T, E2>

where C: ErrorContext<Err = E2, Source = E1>,

fn with_context<C, E2, F>(self, f: F) -> Result<T, E2>

where F: FnOnce(&E1) -> C, C: ErrorContext<Err = E2, Source = E1>,

Implementors