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adds documentation to define the default value for target isolation #8823

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Jun 16, 2025
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3 changes: 3 additions & 0 deletions Sources/PackageDescription/BuildSettings.swift
Original file line number Diff line number Diff line change
Expand Up @@ -472,6 +472,9 @@ public struct SwiftSetting: Sendable {
/// inference. The only valid arguments are `MainActor.self` and `nil`.
/// - condition: A condition that restricts the application of the build
/// setting.
///
/// The compiler defaults to inferring unannotated code as `nonisolated` if unspecified,
/// or if the `isolation` parameter is set to `nil`.
@available(_PackageDescription, introduced: 6.2)
public static func defaultIsolation(
_ isolation: MainActor.Type?,
Expand Down