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Extension to convert a failable Publisher into a non-failable Result based publisher (as well as extensions to break out values/errors) - Same idea as RxSwifts Materialize
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| extension Publisher { | |
| func asResult() -> AnyPublisher<Result<Output, Failure>, Never> { | |
| return map(Result.success) | |
| .catch { Just(Result.failure($0)) } | |
| .eraseToAnyPublisher() | |
| } | |
| } | |
| extension Publisher { | |
| func values<S, F: Error>() -> AnyPublisher<S, Never> where Output == Result<S, F>, Failure == Never { | |
| return flatMap { (result) -> AnyPublisher<S, Never> in | |
| switch result { | |
| case .success(let value): | |
| return Just(value).eraseToAnyPublisher() | |
| case .failure: | |
| return Empty().eraseToAnyPublisher() | |
| } | |
| }.eraseToAnyPublisher() | |
| } | |
| func errors<S, F: Error>() -> AnyPublisher<F, Never> where Output == Result<S, F>, Failure == Never { | |
| return flatMap { (result) -> AnyPublisher<F, Never> in | |
| switch result { | |
| case .success: | |
| return Empty().eraseToAnyPublisher() | |
| case .failure(let error): | |
| return Just(error).eraseToAnyPublisher() | |
| } | |
| }.eraseToAnyPublisher() | |
| } | |
| } |
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