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In Swift 4, constructors had the same name as properties,
methods and enum cases named `init`. This meant that you
could use constructor syntax to call such a member, which
caused some confusing behavior.
Recently I added a special declname for `init` so that
constructors have unique names distinct from any name you
can spell, and "foo.init" syntax would look for a member
with the special name rather than one named `init`.
Unfortunately people actually had code where they defined
members named `init` and then use them via normal member
lookup syntax, like this:
enum E {
case `init`
}
let e: E = E.init
So to maintain backward compatibility, hack member lookup
to also find members named `init` when looking up the special
declname for constructors.
The workaround is only enabled in Swift 4 and 4.2 mode;
in Swift 5 mode you are expected to write "foo.`init`" to access
non-constructor members named `init`.
Fixes <rdar://problem/38682258>.
46 lines
770 B
Swift
46 lines
770 B
Swift
// RUN: %target-typecheck-verify-swift -swift-version 4
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// https://bugs.swift.org/browse/SR-1660
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enum DayOfTheWeek : Int {
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case monday = 0
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case `inout` = 1
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case `init` = 2
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case friday = 3
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case tuesday = 4
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}
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let _: DayOfTheWeek = DayOfTheWeek.init
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let _: DayOfTheWeek = DayOfTheWeek.`init`
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func match(_ d: DayOfTheWeek) {
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switch d {
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case .monday: break
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case .`inout`: break
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case .`init`: break
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case .friday: break
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case .tuesday: break
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}
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}
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enum Fox {
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case `init`(Int)
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init() {
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self = .`init`(10)
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}
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}
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let _: Fox = Fox(10)
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// expected-error@-1 {{argument passed to call that takes no arguments}}
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let _: () -> Fox = Fox.init
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let _: (Int) -> Fox = Fox.`init`
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func match(_ f: Fox) {
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switch f {
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case .`init`(let n): _ = n
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}
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}
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