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94 lines
3.1 KiB
Swift
94 lines
3.1 KiB
Swift
// RUN: %target-typecheck-verify-swift -enable-objc-interop
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protocol P { }
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@objc protocol OP { }
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protocol CP : class { }
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@objc protocol SP : OP {
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static func createNewOne() -> SP
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}
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func fP<T : P>(_ t: T?) { }
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func fOP<T : OP>(_ t: T?) { }
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func fOPE(_ t: OP) { }
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func fSP<T : SP>(_ t: T?) { }
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func fAO<T : AnyObject>(_ t: T?) { }
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// expected-note@-1 {{where 'T' = 'any P'}}
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// expected-note@-2 {{where 'T' = 'any CP'}}
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// expected-note@-3 {{where 'T' = 'any OP & P'}}
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func fAOE(_ t: AnyObject) { }
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func fT<T>(_ t: T) { }
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func testPassExistential(_ p: P, op: OP, opp: OP & P, cp: CP, sp: SP, any: Any, ao: AnyObject) {
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fP(p)
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fAO(p) // expected-error{{global function 'fAO' requires that 'any P' be a class type}}
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fAOE(p) // expected-error{{argument type 'any P' expected to be an instance of a class or class-constrained type}}
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fT(p)
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fOP(op)
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fAO(op)
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fAOE(op)
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fT(op)
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fAO(cp) // expected-error{{global function 'fAO' requires that 'any CP' be a class type}}
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fAOE(cp)
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fT(cp)
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fP(opp)
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fOP(opp)
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fAO(opp) // expected-error{{global function 'fAO' requires that 'any OP & P' be a class type}}
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fAOE(opp)
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fT(opp)
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fOP(sp)
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fSP(sp)
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fAO(sp)
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fAOE(sp)
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fT(sp)
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fT(any)
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fAO(ao)
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fAOE(ao)
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}
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class GP<T : P> {}
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class GOP<T : OP> {}
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class GCP<T : CP> {}
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class GSP<T : SP> {}
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class GAO<T : AnyObject> {} // expected-note 2{{requirement specified as 'T' : 'AnyObject'}}
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func blackHole(_ t: Any) {}
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func testBindExistential() {
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blackHole(GP<P>()) // expected-error{{type 'any P' cannot conform to 'P'}} expected-note {{only concrete types such as structs, enums and classes can conform to protocols}}
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blackHole(GOP<OP>())
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blackHole(GCP<CP>()) // expected-error{{type 'any CP' cannot conform to 'CP'}} expected-note {{only concrete types such as structs, enums and classes can conform to protocols}}
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blackHole(GAO<P>()) // expected-error{{'GAO' requires that 'any P' be a class type}}
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blackHole(GAO<OP>())
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blackHole(GAO<CP>()) // expected-error{{'GAO' requires that 'any CP' be a class type}}
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blackHole(GSP<SP>()) // expected-error{{'any SP' cannot be used as a type conforming to protocol 'SP' because 'SP' has static requirements}}
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blackHole(GAO<AnyObject>())
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}
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// rdar://problem/21087341
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protocol Mine {}
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class M1: Mine {}
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class M2: Mine {}
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extension Collection where Iterator.Element : Mine {
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// expected-note@-1 {{required by referencing instance method 'takeAll()' on 'Collection'}}
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func takeAll() {}
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}
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func foo() {
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let allMine: [Mine] = [M1(), M2(), M1()]
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// FIXME: we used to have a better diagnostic here -- the type checker
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// would admit the conformance Mine : Mine, and later when computing
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// substitutions, a specific diagnostic was generated. Now the
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// conformance is rejected because Mine is not @objc, and we hit the
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// generic no overloads error path. The error should actually talk
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// about the return type, and this can happen in other contexts as well;
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// <rdar://problem/21900971> tracks improving QoI here.
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allMine.takeAll() // expected-error{{type 'any Mine' cannot conform to 'Mine'}} expected-note {{only concrete types such as structs, enums and classes can conform to protocols}}
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}
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