# Publishers.TryAllSatisfy A publisher that publishes a single Boolean value that indicates whether all received elements pass a given error-throwing predicate. ``` struct TryAllSatisfy where Upstream : Publisher ``` ## Topics ### Creating a try-all-satisfy publisher [`init(upstream:predicate:)`](/documentation/Combine/Publishers/TryAllSatisfy/init(upstream:predicate:)) Returns a publisher that publishes a single Boolean value that indicates whether all received elements pass a given error-throwing predicate. ### Declaring supporting types [`Publishers.TryAllSatisfy.Output`](/documentation/Combine/Publishers/TryAllSatisfy/Output) The kind of values published by this publisher. [`Publishers.TryAllSatisfy.Failure`](/documentation/Combine/Publishers/TryAllSatisfy/Failure) The kind of errors this publisher might publish. ### Inspecting publisher properties [`upstream`](/documentation/Combine/Publishers/TryAllSatisfy/upstream) The publisher from which this publisher receives elements. [`predicate`](/documentation/Combine/Publishers/TryAllSatisfy/predicate) A closure that evaluates each received element. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)