31 lines
1.1 KiB
Swift
31 lines
1.1 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import Combine
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import Foundation
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extension Publisher where Failure == Never {
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/// Same as `assign(to:on:)` but maintains a weak reference to object
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///
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/// Useful in cases where you want to pass self and not cause a retain cycle.
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func weakAssign<T: AnyObject>(to keyPath: ReferenceWritableKeyPath<T, Output>,
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on object: T) -> AnyCancellable {
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sink { [weak object] value in
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object?[keyPath: keyPath] = value
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}
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}
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}
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