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A `@convention(block)` closure in Swift is completely compatible with Objective-C and does not need to be wrapped in a `__SwiftValue` box for use. Previously, it was bridged verbatim when appearing by itself, but could end up boxed when it went through array bridging. The test verifies that: * Objective-C does not see a `__SwiftValue` box * Swift `type(of:)` does not see a `__SwiftValue` box * Objective-C can actually call the closure Resolves rdar://138132321
77 lines
2.7 KiB
Swift
77 lines
2.7 KiB
Swift
// Casts.swift - Tests for conversion between types.
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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// -----------------------------------------------------------------------------
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///
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/// Contains tests for non-trapping type conversions reported by users.
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///
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// -----------------------------------------------------------------------------
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// RUN: %empty-directory(%t)
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//
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// RUN: %clang %target-cc-options -isysroot %sdk -fobjc-arc %S/Inputs/Cast_Blocks/Cast_Blocks.m -c -o %t/Cast_Blocks.o -g
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//
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// RUN: %target-build-swift -I %S/Inputs/Cast_Blocks %t/Cast_Blocks.o -swift-version 6 -g -Onone -module-name a %s -o %t/a.swift6.Onone.out
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// RUN: %target-codesign %t/a.swift6.Onone.out
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// RUN: %target-run %t/a.swift6.Onone.out
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//
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// RUN: %target-build-swift -I %S/Inputs/Cast_Blocks %t/Cast_Blocks.o -swift-version 6 -g -O -module-name a %s -o %t/a.swift6.O.out
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// RUN: %target-codesign %t/a.swift6.O.out
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// RUN: %target-run %t/a.swift6.O.out
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//
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// RUN: %target-build-swift -I %S/Inputs/Cast_Blocks %t/Cast_Blocks.o -swift-version 5 -g -Onone -module-name a %s -o %t/a.swift5.Onone.out
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// RUN: %target-codesign %t/a.swift5.Onone.out
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// RUN: %target-run %t/a.swift5.Onone.out
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//
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// RUN: %target-build-swift -I %S/Inputs/Cast_Blocks %t/Cast_Blocks.o -swift-version 5 -g -O -module-name a %s -o %t/a.swift5.O.out
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// RUN: %target-codesign %t/a.swift5.O.out
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// RUN: %target-run %t/a.swift5.O.out
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//
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// REQUIRES: executable_test
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// REQUIRES: objc_interop
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// UNSUPPORTED: use_os_stdlib
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// UNSUPPORTED: back_deployment_runtime
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import StdlibUnittest
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import Foundation
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import Cast_Blocks
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fileprivate func SwiftThinksObjectIsSwiftValue<T>(_ t: T) -> Bool {
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let type = "\(type(of: t))"
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return type == "__SwiftValue"
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}
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let CastsTests = TestSuite("Cast_Blocks")
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CastsTests.test("block closures should bridge without __SwiftValue")
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{
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let x: @convention(block) () -> Void = {}
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expectFalse(ObjCThinksObjectIsSwiftValue(x))
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expectFalse(SwiftThinksObjectIsSwiftValue(x))
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ObjCCanCallBlock(x);
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}
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// Bug: @convention(block) closure used to be incorrectly wrapped in
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// SwiftValue box when bridged to Objective-C as a member of an array
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CastsTests.test("block closures in array should bridge without __SwiftValue")
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{
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let f: @convention(block) () -> Void = {}
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let x = ([f] as NSArray)[0]
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expectFalse(ObjCThinksObjectIsSwiftValue(x))
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expectFalse(SwiftThinksObjectIsSwiftValue(x))
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ObjCCanCallBlock(x);
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}
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runAllTests()
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