Function context_accumulator 

pub fn context_accumulator<E, I, C>(
    contexts: I,
) -> impl Fn(E) -> ComposableError<E>
where
    I: IntoIterator<Item = C> + Clone,
    C: IntoErrorContext + Clone,

Creates a reusable closure that wraps errors with multiple contexts.

Returns a function that can be used with map_err to attach the same set of contexts to multiple error paths.

Arguments

• contexts - Iterator of contexts to attach (must be Clone)

Examples

use error_rail::{context_accumulator, ErrorContext};

let contexts = vec![ErrorContext::tag("auth"), ErrorContext::tag("api")];
let add_contexts = context_accumulator(contexts);
let err = add_contexts("unauthorized");
assert_eq!(err.context().len(), 2);