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// RUN: %target-swift-frontend -emit-sil -o /dev/null -verify %s
// RUN: %target-swift-frontend -emit-sil -o /dev/null -verify %s -strict-concurrency=targeted
// RUN: %target-swift-frontend -emit-sil -o /dev/null -verify %s -verify-additional-prefix complete-and-tns- -strict-concurrency=complete
// RUN: %target-swift-frontend -emit-sil -o /dev/null -verify %s -verify-additional-prefix complete-and-tns- -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
// REQUIRES: concurrency
// REQUIRES: asserts
// https://github.com/apple/swift/issues/59909
struct Future<T> { }
extension Future {
@preconcurrency
func flatMap<NewValue>(_ callback: @escaping @Sendable (T) -> Future<NewValue>) -> Future<NewValue> { // #1
fatalError()
}
@preconcurrency
public func flatMapErrorThrowing(_ callback: @escaping @Sendable (Error) throws -> T) -> Future<T> {
fatalError("")
}
}
extension Future {
@available(*, deprecated, message: "")
func flatMap<NewValue>(file: StaticString = #file, line: UInt = #line, _ callback: @escaping (T) -> Future<NewValue>) -> Future<NewValue> { // #2
// expected-complete-and-tns-note @-1 {{parameter 'callback' is implicitly non-sendable}}
return self.flatMap(callback)
// expected-complete-and-tns-warning @-1 {{passing non-sendable parameter 'callback' to function expecting a @Sendable closure}}
}
@inlinable
@available(*, deprecated, message: "Please don't pass file:line:, there's no point.")
public func flatMapErrorThrowing(file: StaticString = #file, line: UInt = #line, _ callback: @escaping (Error) throws -> T) -> Future<T> {
return self.flatMapErrorThrowing(callback)
// expected-complete-and-tns-warning @-1 {{function call causes an infinite recursion}}
}
}
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