Trait ResultExt 

pub trait ResultExt<T, E> {
    // Required methods
    fn ctx<C: IntoErrorContext>(
        self,
        msg: C,
    ) -> Result<T, Box<ComposableError<E>>>;
    fn ctx_with<F>(self, f: F) -> Result<T, Box<ComposableError<E>>>
       where F: FnOnce() -> String;
}

Extension trait for ergonomic context addition to Result types.

Required Methods

fn ctx<C: IntoErrorContext>(self, msg: C) -> Result<T, Box<ComposableError<E>>>

Adds a static context message to the error.

fn ctx_with<F>(self, f: F) -> Result<T, Box<ComposableError<E>>>

where F: FnOnce() -> String,

Adds a lazily-evaluated context message to the error.

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, E> for Result<T, E>

fn ctx<C: IntoErrorContext>(self, msg: C) -> Result<T, Box<ComposableError<E>>>

fn ctx_with<F>(self, f: F) -> Result<T, Box<ComposableError<E>>>

where F: FnOnce() -> String,

Implementors