Import
import { mapError } from "@typed/fx/RefResult";Signatures
export declare const mapError: {
<ResultE, ResultE2>(f: (e: ResultE) => ResultE2): <A, Err, R>(ref: RefResult<A, ResultE, Err, R>) => RefSubject.Computed<Result.Result<A, ResultE2>, Err, R>;
<A, ResultE, Err, R, ResultE2>(ref: RefResult<A, ResultE, Err, R>, f: (e: ResultE) => ResultE2): RefSubject.Computed<Result.Result<A, ResultE2>, Err, R>;
};Why
Projects result state with map error for both current reads and future pushes, avoiding a second mutable cache of the derived value.
Ownership and lifetime
The map error view retains no independent state. An Effect read samples the source once; Fx observation follows later pushes and its observing Scope owns subscription cleanup.
Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.