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edcde7c55c
Previously, `__attribute__((swift_attr("sending")))` would only be
resolved when attached to declarations. This patch expands it to be
a type attribute as well, which enables it to occur in the result and
parameter positions for blocks, function pointers, and lambdas.
Resolves rdar://148435359
56 lines
2.3 KiB
Swift
56 lines
2.3 KiB
Swift
// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource -I %t) -swift-version 6 -disable-availability-checking -emit-sil -o /dev/null %s -parse-as-library -enable-experimental-feature SendingArgsAndResults -verify -import-objc-header %S/Inputs/sending.h
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// REQUIRES: concurrency
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// REQUIRES: swift_feature_SendingArgsAndResults
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////////////////////////
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// MARK: Declarations //
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////////////////////////
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// Make our non sendable c struct non-Sendable
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@available(*, unavailable)
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extension NonSendableCStruct: Sendable {}
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@MainActor func sendToMain<T>(_ t: T) async {}
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func useValue<T>(_ t: T) {}
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/////////////////
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// MARK: Tests //
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/////////////////
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func funcTestSendingResult() async {
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let x = NonSendableCStruct()
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let y = sendUserDefinedFromGlobalFunction(x)
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await sendToMain(x)
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useValue(y)
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// Just to show that without the sending param, we generate diagnostics.
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let x2 = NonSendableCStruct()
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let y2 = returnUserDefinedFromGlobalFunction(x2)
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await sendToMain(x2) // expected-error {{sending 'x2' risks causing data races}}
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// expected-note @-1 {{sending 'x2' to main actor-isolated global function 'sendToMain' risks causing data races between main actor-isolated and local nonisolated uses}}
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useValue(y2) // expected-note {{access can happen concurrently}}
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}
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func funcTestSendingArg() async {
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let x = NonSendableCStruct()
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sendUserDefinedIntoGlobalFunction(x) // expected-error {{sending 'x' risks causing data races}}
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// expected-note @-1 {{'x' used after being passed as a 'sending' parameter}}
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useValue(x) // expected-note {{access can happen concurrently}}
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}
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func funcTestSendingClosureArg() async {
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sendingWithCompletionHandler { (x: sending NonSendableCStruct) in
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sendUserDefinedIntoGlobalFunction(x) // expected-error {{sending 'x' risks causing data races}}
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// expected-note @-1 {{'x' used after being passed as a 'sending' parameter}}
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useValue(x) // expected-note {{access can happen concurrently}}
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}
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let x = sendingWithLazyReturn { () -> sending NonSendableCStruct in
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NonSendableCStruct()
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}
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sendUserDefinedIntoGlobalFunction(x) // expected-error {{sending 'x' risks causing data races}}
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// expected-note @-1 {{'x' used after being passed as a 'sending' parameter}}
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useValue(x) // expected-note {{access can happen concurrently}}
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}
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