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Add a test for circular protocol inheritance through a typealias #23919

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Apr 10, 2019
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Add a test for circular protocol inheritance through a typealias #23919

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5 changes: 5 additions & 0 deletions test/decl/protocol/conforms/circular_validation.swift
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Expand Up @@ -11,3 +11,8 @@ struct S : P { // expected-error {{type 'S' does not conform to protocol 'P'}}
static var x = 0 // expected-note {{candidate operates on a type, not an instance as required}}
var x = S.x // expected-note {{candidate references itself}}
}

// FIXME: Lousy diagnostics on this case.
protocol SR9224_Foo: SR9224_Foobar {} // expected-error 2 {{protocol 'SR9224_Foo' refines itself}}
protocol SR9224_Bar: SR9224_Foobar {} // expected-error {{protocol 'SR9224_Bar' refines itself}} expected-note {{protocol 'SR9224_Bar' declared here}}
typealias SR9224_Foobar = SR9224_Foo & SR9224_Bar