mirror of
https://github.com/apple/swift.git
synced 2026-06-20 15:42:51 +02:00
Doug Gregor
ae1e3d0865
The new library, swiftEmbeddedPlatformPOSIX, implements all of the _swift_XYZ functions needed to support Embedded Swift as shims on top of a POSIX system that provides posix_memalign, free, putchar, and so on. This offers an easier way to bridge between the prior ad hoc requirements of Embedded Swift and the newer platform abstraction layer. Part of rdar://164057124
45 lines
1.2 KiB
Swift
45 lines
1.2 KiB
Swift
// RUN: %target-run-simple-swift( -enable-experimental-feature Embedded -wmo -runtime-compatibility-version none %target-embedded-posix-shim) | %FileCheck %s
|
|
// RUN: %target-run-simple-swift(-O -enable-experimental-feature Embedded -wmo -runtime-compatibility-version none %target-embedded-posix-shim) | %FileCheck %s
|
|
|
|
// REQUIRES: swift_in_compiler
|
|
// REQUIRES: executable_test
|
|
// REQUIRES: optimized_stdlib
|
|
// REQUIRES: swift_feature_Embedded
|
|
|
|
@dynamicMemberLookup
|
|
public struct Box<T>: ~Copyable {
|
|
init() {
|
|
self.value = UnsafeMutablePointer<T>.allocate(capacity: 1)
|
|
}
|
|
|
|
public subscript<U>(dynamicMember member: WritableKeyPath<T, U>) -> U {
|
|
@_transparent
|
|
get { return self.value.pointer(to: member)!.pointee }
|
|
|
|
@_transparent
|
|
set { self.value.pointer(to: member)!.pointee = newValue }
|
|
}
|
|
|
|
@usableFromInline
|
|
var value: UnsafeMutablePointer<T>
|
|
}
|
|
|
|
public struct Foo {
|
|
var a: Int
|
|
var b: Int
|
|
}
|
|
|
|
public func test_read(x: inout Box<Foo>) -> Int {
|
|
return x.b
|
|
}
|
|
|
|
public func test_write(x: inout Box<Foo>) {
|
|
x.b = 42
|
|
}
|
|
|
|
var box = Box<Foo>()
|
|
_ = test_read(x: &box)
|
|
test_write(x: &box)
|
|
print(box.b)
|
|
// CHECK: 42
|