Trait BoxedResultExt 

pub trait BoxedResultExt<T, E> {
    // Required methods
    fn ctx_boxed<C: IntoErrorContext>(self, msg: C) -> Self;
    fn ctx_boxed_with<F>(self, f: F) -> Self
       where F: FnOnce() -> String;
}

Extension trait for adding context to already-boxed ComposableError results.

This trait allows chaining .ctx() calls on results that already contain a boxed ComposableError.

Examples

use error_rail::traits::{ResultExt, BoxedResultExt};

fn inner() -> Result<(), Box<error_rail::ComposableError<&'static str>>> {
    Err("inner error").ctx("inner operation")
}

fn outer() -> Result<(), Box<error_rail::ComposableError<&'static str>>> {
    inner().ctx_boxed("outer operation")
}

Required Methods

fn ctx_boxed<C: IntoErrorContext>(self, msg: C) -> Self

Adds additional context to an already-boxed ComposableError.

fn ctx_boxed_with<F>(self, f: F) -> Self

where F: FnOnce() -> String,

Adds lazily-evaluated context to an already-boxed ComposableError.

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> BoxedResultExt<T, E> for Result<T, Box<ComposableError<E>>>

fn ctx_boxed<C: IntoErrorContext>(self, msg: C) -> Self

fn ctx_boxed_with<F>(self, f: F) -> Self

where F: FnOnce() -> String,

Implementors