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// RUN: %target-run-simple-swift(-Xfrontend -sil-verify-all) | %FileCheck %s
// RUN: %target-run-simple-swift(-O -Xfrontend -sil-verify-all) | %FileCheck %s
// REQUIRES: executable_test
public struct BufferView<T>: ~Copyable {
var ptr: UnsafeBufferPointer<T>
var count: Int {
return ptr.count
}
subscript(_ x: Int) -> T {
return ptr[x]
}
deinit {}
}
extension Array {
public mutating func withBufferView<U>(_ f: (borrowing BufferView<Element>) -> U) -> U {
return withUnsafeBufferPointer {
return f(BufferView(ptr: $0))
}
}
}
func testBufferView(_ x: __owned [Int]) {
var y = consume x
// CHECK: 1
// CHECK: 2
// CHECK: 3
y.withBufferView {
for i in 0..<$0.count {
print($0[i])
}
}
}
@inline(never)
func getBool() -> Bool { return true }
func testConditionalBufferView(_ x: __owned [Int]) {
(consume x).withUnsafeBufferPointer {
let y = BufferView(ptr: $0)
// CHECK: 4
// CHECK: 5
// CHECK: 6
if getBool() {
for i in 0..<y.count {
print(y[i])
}
}
}
}
func main() {
testBufferView([1,2,3])
testConditionalBufferView([4,5,6])
}
main()
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