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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
extension Sequence {
/// Just like `Sequence.map` but allows an `async` transform function.
public func asyncMap<T>(
@_inheritActorContext _ transform: @Sendable (Element) async throws -> T
) async rethrows -> [T] {
var result: [T] = []
result.reserveCapacity(self.underestimatedCount)
for element in self {
try await result.append(transform(element))
}
return result
}
/// Just like `Sequence.compactMap` but allows an `async` transform function.
public func asyncCompactMap<T>(
@_inheritActorContext _ transform: @Sendable (Element) async throws -> T?
) async rethrows -> [T] {
var result: [T] = []
for element in self {
if let transformed = try await transform(element) {
result.append(transformed)
}
}
return result
}
/// Just like `Sequence.map` but allows an `async` transform function.
public func asyncFilter(
@_inheritActorContext _ predicate: @Sendable (Element) async throws -> Bool
) async rethrows -> [Element] {
var result: [Element] = []
for element in self {
if try await predicate(element) {
result.append(element)
}
}
return result
}
}
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