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// RUN: %target-swift-frontend %s -emit-sil \
// RUN: -o /dev/null \
// RUN: -verify \
// RUN: -sil-verify-all \
// RUN: -module-name test \
// RUN: -enable-experimental-feature NonescapableTypes
// REQUIRES: asserts
// REQUIRES: swift_in_compiler
struct BV : ~Escapable {
let p: UnsafeRawPointer
let i: Int
@_unsafeNonescapableResult
init(_ p: UnsafeRawPointer, _ i: Int) {
self.p = p
self.i = i
}
// Test borrowing `self`
public var isEmpty: Bool { i == 0 }
// Test consuming `self`
consuming func derive() -> dependsOn(self) BV {
// Technically, this "new" view does not depend on the 'view' argument.
// This unsafely creates a new view with no dependence.
return BV(self.p, self.i)
}
}
@_nonescapable
struct NE {
var bv: BV
@_unsafeNonescapableResult
init(_ bv: BV) {
self.bv = bv
}
}
struct NC : ~Copyable {
let p: UnsafeRawPointer
let i: Int
func withBV<ResultType>(_ body: (BV) throws -> ResultType) rethrows
-> ResultType {
try body(BV(p, i))
}
}
func takeNoescapeInt(_ f: ()->Int) -> Int { f() }
func bv_extract_pointer(_ bv: BV) -> UnsafeRawPointer {
return bv.p
}
func bv_argument(bv: BV) -> UnsafeRawPointer {
return bv_extract_pointer(bv)
}
func bv_capture_noescape(bv: BV) -> Int {
return takeNoescapeInt { bv.i }
}
func bv_assign_let(_ bv: BV) -> UnsafeRawPointer {
let local = bv
return local.p
}
func bv_assign_var(_ bv1: BV, _ bv2: BV, _ z: Bool) -> UnsafeRawPointer {
var local: BV
if z {
local = bv1
} else {
local = bv2
}
return local.p
}
func bv_assign_field(_ bv: BV) -> UnsafeRawPointer {
let ne = NE(bv)
return ne.bv.p
}
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