Trait Contextual 

pub trait Contextual<E> {
    type Destination;

    // Required method
    fn build_error(self, source: E) -> Self::Destination;
}

Builds a target error from a context selector and a source error of type E.

Implemented automatically by the context selector structs generated by #[derive(Oopsie)]. You rarely implement this manually, and most code never names it directly — ResultExt::context and OptionExt::context drive it. Reach for it only when building an error outside a Result/Option, e.g. selector.build_error(source).

Required Associated Types

type Destination

The destination error type being built by this context selector.

Required Methods

fn build_error(self, source: E) -> Self::Destination

Build the target error from this context selector and the source error.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors