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// RUN: %target-swift-frontend %s -emit-sil -verify
struct NC: ~Copyable {
func borrow() {}
consuming func consume() {}
mutating func mutate () {}
}
struct Box<Wrapped: ~Copyable> {
consuming func map(_ transform: (consuming Wrapped)->Void) { }
}
struct Tree: ~Copyable {
static func insert(_ box: consuming Box<Self>) {
box.map { x in x.insert() }
}
consuming func insert() { }
}
func withConsuming(_ body: (consuming NC) -> Void) {
body(NC())
}
func withBorrowing(_ body: (borrowing NC) -> Void) {
body(NC())
}
func withMutating(_ body: (inout NC) -> Void) {
var nc = NC()
body(&nc)
}
func withShared(_ body: (__shared NC) -> Void) {
body(NC())
}
func withOwned(_ body: (__owned NC) -> Void) {
body(NC())
}
withMutating { nc in
nc.mutate()
}
withConsuming { nc in
nc.consume()
}
withBorrowing { // expected-error {{'$0' is borrowed and cannot be consumed}}
$0.borrow()
$0.consume() // expected-note {{consumed here}}
}
withShared { // expected-error {{'$0' is borrowed and cannot be consumed}}
$0.borrow()
$0.consume() // expected-note {{consumed here}}
}
withOwned {
$0.consume()
}
do {
let clos: (consuming NC) -> Void = {
$0.consume()
}
clos(NC())
}
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