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Quiz: What does @_transparent on an extension actually *do*? 1) Make all members @_transparent? 2) Allow your members to be @_transparent? 3) Some other magical effect that has nothing to do with members? The correct answer is 1), however a few places in the stdlib defined a @_transparent extension and then proceeded to make some or all members also @_transparent, and in a couple of places we defined a @_transparent extension with no members at all. To avoid cargo culting and confusion, remove the ability to make @_transparent extensions altogether, and force usages to be explicit.
92 lines
1.4 KiB
Swift
92 lines
1.4 KiB
Swift
@_transparent public func testTransparent(x x: Bool) -> Bool {
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return x
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}
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@_transparent public func testBuiltin() -> Int32 {
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var y: Int32 = 300
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var z = "foo"
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return y
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}
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@_transparent public func standalone_function(x x: Int32, y: Int32) -> Int32 {
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return x
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}
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public func foo() -> Int32 { return 0 }
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public func runced() -> Bool { return true }
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public func a() {}
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public func b() {}
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public func c() {}
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public func d() {}
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public func e() {}
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@_transparent public func test_br() {
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switch foo() {
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case _ where runced():
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a()
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case _:
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b()
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}
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c()
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}
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public enum MaybePair {
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case Neither
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case Left(Int32)
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case Right(String)
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case Both(Int32, String)
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}
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public func do_switch(u u: MaybePair) {
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switch u {
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case .Neither:
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a()
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case .Left:
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b()
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case .Right:
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c()
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case .Both:
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d()
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}
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e()
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}
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public struct Wrapper {
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public var value: Int32
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@_transparent public init(Val: Int32) {
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value = Val
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}
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@_transparent public func getValue() -> Int32 {
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return value
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}
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public var valueAgain: Int32 {
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@_transparent
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get {
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return value
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}
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}
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}
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public extension Wrapper {
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@_transparent
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func getValueAgain() -> Int32 {
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return self.value
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}
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}
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public protocol P {
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func f() -> Self
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}
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public protocol CP : class {
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func f() -> Self
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}
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@_transparent public
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func open_existentials(p p: P, cp: CP) {
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p.f()
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cp.f()
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}
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