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// RUN: %target-run-simple-swift
// REQUIRES: executable_test
// REQUIRES: objc_interop
import StdlibUnittest
import Foundation
import Dispatch
var WithoutEscapingSuite = TestSuite("WithoutActuallyEscapingBlock")
var sink: Any = ()
@objc class BlockConsumer : NSObject {
@inline(never)
@objc dynamic func call(block: @escaping () -> ()) {
block()
}
}
func dontReallyEscape(f: @convention(block) () -> ()) {
let escape : (@escaping @convention(block) () -> ()) -> () = { (b: @escaping @convention(block) () -> ()) -> () in
BlockConsumer().call(block : b)
}
let _ :() = withoutActuallyEscaping(f, do: escape)
}
WithoutEscapingSuite.test("ExpectNoCrash") {
var shouldBeTrue = false
dontReallyEscape(f: { shouldBeTrue=true })
expectTrue(shouldBeTrue)
}
WithoutEscapingSuite.test("ExpectNoCrash2") {
for _ in 1...10 {
let queue = DispatchQueue(label: "Foo")
queue.sync { }
}
}
if #available(OSX 10.10, iOS 8.0, *) {
enum Result<T> {
case error
case t(T)
}
func foo<T>(block: () throws -> T) {
let q = DispatchQueue(label: "Test")
var result: Result<T>! = nil
withoutActuallyEscaping(block) { (block) -> () in
let item = DispatchWorkItem(qos: .unspecified, flags: []) {
do {
result = .t(try block())
}
catch {
result = .error
}
}
q.sync(execute: item)
}
}
WithoutEscapingSuite.test("ExpectNoCrash3") {
for _ in 1...10 {
foo(block: { return 10 })
}
}
}
runAllTests()
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