Trait ResultExt 

pub trait ResultExt<T> {
    // Required methods
    fn context<S: ToString>(self, ctx: S) -> Result<T>;
    fn with_context<S: ToString, F: FnOnce() -> S>(self, ctx_fn: F) -> Result<T>;
}

Extension methods to the Result type.

Required Methods

fn context<S: ToString>(self, ctx: S) -> Result<T>

Adds some context to the error.

fn with_context<S: ToString, F: FnOnce() -> S>(self, ctx_fn: F) -> Result<T>

Adds context to the error, evaluating the context function only if there is an Err.

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, E> ResultExt<T> for Result<T, E>

where E: Error + Send + 'static,

fn context<S: ToString>(self, ctx: S) -> Result<T>

fn with_context<S: ToString, F: FnOnce() -> S>(self, ctx_fn: F) -> Result<T>

Implementors