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897a74f495
Un-reverts 9c01ee2c1b.
Also, add myself as a reviewer for more availability related files.
NFC.
43 lines
1.6 KiB
Swift
43 lines
1.6 KiB
Swift
// RUN: %target-swift-frontend -emit-sil -verify %s | %FileCheck %s
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// REQUIRES: OS=macosx
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public protocol Potato {
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func eat()
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}
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public protocol Fried {}
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extension Potato {
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public func eat() {}
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}
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@available(macOS 100, *)
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extension Potato where Self : Fried {
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public func eat() {}
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}
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// We ought to pick the unconstrained Potato.eat(), not
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// the one from the extension, because the extension has
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// narrower availability than the conformance.
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public struct CurlyFries : Potato, Fried {}
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public struct TaterTots {}
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// This conformance on the other hand should use the
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// constrained Potato.eat(), since the generic signature
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// is more specific than the unconstrained protocol
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// extension.
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@available(macOS 100, *)
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extension TaterTots : Potato, Fried {}
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// We FileCheck the SILGen output to verify that the correct
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// witnesses were chosen above.
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// CHECK-LABEL: sil shared [transparent] [thunk] @$s37conformance_availability_disambiguate10CurlyFriesVAA6PotatoA2aDP3eatyyFTW : $@convention(witness_method: Potato) (@in_guaranteed CurlyFries) -> () {
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// CHECK: function_ref @$s37conformance_availability_disambiguate6PotatoPAAE3eatyyF : $@convention(method) <τ_0_0 where τ_0_0 : Potato> (@in_guaranteed τ_0_0) -> ()
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// CHECK: return
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// sil shared [transparent] [thunk] @$s37conformance_availability_disambiguate9TaterTotsVAA6PotatoA2aDP3eatyyFTW : $@convention(witness_method: Potato) (@in_guaranteed TaterTots) -> () {
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// CHECK: function_ref @$s37conformance_availability_disambiguate6PotatoPA2A5FriedRzrlE3eatyyF : $@convention(method) <τ_0_0 where τ_0_0 : Fried, τ_0_0 : Potato> (@in_guaranteed τ_0_0) -> ()
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// CHECK: return |