# isSuccess

Check if the current state of a RefResult is Success.

## Signatures

```ts
export declare const isSuccess: <A, ResultE, Err, R>(ref: RefResult<A, ResultE, Err, R>) => RefSubject.Computed<boolean, Err, R>;
```

## Why

Exposes the Result success discriminator as Computed state without changing or duplicating the
RefResult.

## Ownership and lifetime

The is success view retains no independent state. An Effect read samples the source once; Fx
observation follows later pushes and its observing Scope owns subscription cleanup.